being a supra owner myself, by removing the cat you are running about 22psi of boost because there is no back pressure to regulate the boost. the breaking up your hearing is the car running to lean and fuel cutting. If you keep driving the car like that then you'll blow your turbos. Get a restrictor ring for the downpipe which will regulate your boost at 17.5-18psi and then get a mines ecu which is a plug and play ecu with a map for 17.5psi of boost. With this set up youll make about 400hp.
Creesic You completely ignored the (being a supra owner myself) I would much rather trust an owner of a Supra than someone who thinks it could be something.
He needs a fuel cut defender, uprated 255+ fuel pump and a restrictor ring and maybe an electric boost controller and set the boost to about 1.2ish bar
TJ you seriously need to read your comments dude. If it was as tough as you say it was to find. I told you the US and JDM front cat delete were different and where to find that in a previous video. Take advice from Supra owners. We’re here to help you. Also hopefully you saw my comment about the restrictor ring to prevent overboost. In the Supra community there are some that say you don’t need it but from my personal experience my stock twins went because I didn’t have one
Hey Tokyo JZA80, which downpipe would you go with? I was confused for the longest time, because the HKS midpipe is called a downpipe on the internet, but it is not the whole thing. Apparently, HKS doesn't have an actual downpipe available. From this video, he's using an Autobahn88 downpipe. Never heard of it. I have the same exact exhaust that TJ has that I put on three years ago. HKS Carbon Ti. Unlike TJ, I will run a restrictor ring, I think between the 1st decat and the 2nd. I'd appreciate your help. Thanks.
On the jdm twins you will need some kind of restrictor ring or ecu to control boost because the turbos are ceramic and you dont want to push them past 17-18psi. You can install a HKS fuel cut defender to sort out your fuel cut issues as the ecu will cut fuel at around 12-13psi as a fail safe. I have just gone through the same thing on my jdm twin turbo supra.
I ran a 4inch straight pipe all the way back up until July. I personally loved the sound but it was so loud that sometimes we would get threatened about being kicked off the track. My sponsor ended up doing a down turn angle that helped out a little bit but then we went to the Sports Land Yamanashi track and got kicked off there for noise. Another sponsor came in and gave us a new titanium concept but I haven’t seen the car since I’ve been visiting in the U.S. I’m hoping the noise is more tame now.
Love it! Few things tho for anyone doing BPU upgrades to their 2J's 1) upgrade to a 255+lph fuel pump to stop the engine from leaning out because of the extra boost 2) smaller gap spark plugs (.8) 3) the ecu will begin to cut fuel after 1 bar (14.7psi) as a safety precaution (note that the stock JDM twins can safely boost to 17psi) you'll need a fuel cut defender (hks) Do all 3 of the above at the same time for best performance! Also note that if you delete all the cats (straight pipe basically;) ) then you'll overboost to about 19-20 Psi. Keep an eye on your boost gauge cuz if you keep boosting the stock JDM ceramic blades over 17psi then you'll wear them out A LOT FASTER!
Nolan Canale literally has already stated he’s not gonna keep it stock brah. Said it would be cool to keep it stock & in good condition but it would be funner to go full send.
My JDM 2jzgte did the same thing, it’s fuel cut. When you run a straight pipe exhaust without a restrictor you push past 14psi on the stock turbos and hit fuel cut via the ecu.
Sound good Teej. Big part of the reason that it's still so quiet is because the factory turbos run in sequential mode, so until 4000rpm or so, all the exhaust essentially comes through only one turbo. 5 minutes with some vacuum tubing can convert it to a standard twin turbo configuration (often called TTC by Supra guys) which will make it much louder as well as get rid of the dip in power in the midrange. Down the road, running hybrid turbos in the factory spot in TTC mode means you could run 500+whp in a car that could look completely stock under the hood, preserving how clean it currently is and being a little more unique than a single turbo build
The breaking up is fuel cut. You get it on stock JZs when you remove the downpipe cat because the turbos regulate waste gate pressure from exhaust back pressure therefore it's over boosting. You can buy restrictor rings for them or you can get a decent boost controller to get round it.
you answered before i could. I was going to say it might be hitting fuel cut or boost cut. almost like the ecu hitting "rev" limit early. built in fail safes for fuel and overboosting. apexi used to make the SAFC for those guys running stock ecu's.
Yes, it would. I would love to see that. I would like to see Blackwidowsupra go head to head with this car out here in Maryland Called Alpha X. His car is so loud he broke my mic. The mic can't really pick how loud he is.
These cars don’t need a “tune” like modern ECU cars do. What he needs is a boost cut defender to bypass boost cut, and an electronic boost controller to control boost. No “tune” needed. (-previous MK3 Turbo and MKIV Twin-Turbo 6-speed owner)
Hey Teeg My understanding is as pressures increase, the need for a stronger spark increases. A local here is running stock ignition with 13 PSI no problem. As soon as he brings it to 15, it breaks up on him. Same thing with me, which is why I run an amp. The density of the a/f I think at higher boost pressures causes the spark not to jump across the electrodes or at least avery weak spark. The voltage from the ignitor to the coils in stock form is too weak to do the job (in most higher boost cases)
Apathity I’ve been having this same problem with my Audi being fully straight piped and I hear it and feel it breaking up in hirer rpms at revs and driving. I changed to colder spark plugs and r8 coil packs seems to not changed anything
Probably already been said but that break up is it hitting the 1 bar fuel cut. On a jspec (jdm) supra you need to run a restrictor plate in the exhaust when decatting. If you want it louder on idle and lower rpm look up ttc mode. Loving the supra on the channel 👌
JZ's run a 10-11afr straight piped. It will be fine.. All JDM cars run extra rich from factory and Supras, JZX's and Aristros have self learning ECU's.
No exactly true, there more to it than “just tune it” as you will need a aftermarket Ecu, and trying to control factory twins is a headache. He needs to just get the boost cut defender/fuel cut defender to fix his issues.
You don't map a car for putting an exhaust on. He needs a restrictor ring to control the boost of the stock twins and a FCD if he wants to raise the boost. You do realise the JZ ECU's were pretty advance for their time? There are people running 800bhp on the factory ECU without a retune.
If this is the same thing that I have on my 1JZ NON VVTI , what you are experiencing is boost cut, stock JZ's have a tendancy to go past the 14.3psi limit for the boost cut to engage, this is caused by your exhaust being bigger...
As the owner of a RHD mkiv Supra, you need a restrictor ring between the downpipe and midpipe on JDMs. You're probably hitting like 22+psi and leaning out. If it's an ODB2 car, those have a lean spot also around 6000 rpm.
Hey Tj at 7:45 you mention that you don't have the sound you want. If you want it to be loud you need to replace the Y-pipe coming off the turbos. The problem in doing this the turbos have so much room to breathe and the car will over boost. These turbos are sequential and recirculate. There is a way to bypass this and the turbos will spool faster.
It needs a single turbo, the exhaust manifold on the twin turbos are super restrictive, also like you said its hard to get sound out of 2 baby turbos. Also doing any mods to a turbo car without tuning is very dangerous.
Most 90's Toyota's had boost cuts up around the 14psi if you don't just hit fuel cut beforehand. If you want a quick fix you can buy a HKS Fuel Cut Defencer for around $130, it helps raise the factory fuel cut level. Don't know if factory wastegate puts it higher than available fueling but should be fine.
(Still needs more loud) but FINALLY this was probably the first thing I said you should have done when you wanted to do an “exhaust” but put that Prius exhaust on the supra instead 😂🤦🏽♂️🤷🏽♂️
The car is leaning out mate and chances are you’ll blow your twins up pritty quickly if you leave it like that. You need a restrictor ring for the exhaust as JDM twins have ceramic internals that cannot handle the boost pressure your straight pipe is allowing them to reach. I also recommend closer gapped spark plugs. You will also 100% need a fuel cut defender. HKS make these. I have one in my 93 TT6. A 4” front mount intercooler will also help the car to breath much better. This will all bring you to what we call BPU which should give you around 400hp. Invest in a ECU that’s tuneable like a Mines or in my opinion a syvecs and you should squeeze around 430-450hp. (At this power however your twins will be on borrowed time. But when look on the bright side, when they die there’s no better excuse for going single)
In the 335i world the first things to check would be spark plugs, coil packs then injectors but the n54 is DI so not 100% sure if PI will have the same issues.
You have a higher flow of air leaving the engine without thinking about the flow of air and burn in the engine. My advice is a hi flow intake a new fuel rail with higher rating injectors also tuning is key.
Over boosting because having the catless downpipe you need a tune with it I went through the same problem. Eventually you want to get a new ecu the stock ecu isn’t that smart lol.check you coils and spark plugs. Once you get it tuned it will solve the over boosting problem
Same thing just happened to me, I have a 2003 vw Gti and I had the muffler and res removed. It would make the exact “backfire” noise. My spark plugs were the only thing wrong. I had a misfire and I had already assumed that it was running lean or rich.
I had the exact problem with the sputtering under heavy load on my r34, I tried swapping in LS coils, new plugs, checked my fuel pump...at the end it was just the cam/crank angle sensor.
It’s not that, he’s just experimenting and taking the build slowly. Later on, tj will probably go big with a fair sized single turbo swap but nothing too ridiculous to keep the value of the car. He definitely won’t do any cutting on the body but it’s going to be a nice supra build... just give him time
You can get a Fuel cut defender but it will just fool the ecu and is not a good course of action unless you have some method of adding some more fuel where its needed. Why fit autobahn88 parts, I thought this build was going to be well thought out?
Just the fact that you continually say "straight piped" and it has a muffler proves what kind of car guy you are......or aren't. Please, keep doing pulls so you blow the 2j up because you don't understand what changing exhaust does to a car.
Try a researching a fuel cut defender for the supra. Decatting a FC rx7 required this little plug and play box as the FC would do the exact same thing under boost in the upper rpm range.
Chuck a set of brand new spark plugs in, and gap then correctly. It sounds like you are losing spark on a cylinder or two. I've had this happen before and it was only up too in the rpm the problem happened because of incorrectly gapped spark plugs.
I had that problem on my R33 skyline where if I hit a certain RPM it sounds like it's hitting limiter and stuttering, a simple coil pack upgrade and spark plug change made it like new if not better.
Sounds like a bad coil or plug so ur getting a misfire maybe. Thats exactly what happened in my b7 audi a4. Sounded exactly the same. Changed out all my coils and spark plugs and fixed the issue. Hope this helps
That sputtering noise means you need to do a tune up. Change spark plugs and coils. Had the same issue when my sc300 valve cover gasket flooded my spark plugs
JDM supras have ceramic turbines. Running your exhaust without a restrictor ring will allow turbos to overboost which will lead to the ceramic blades failing. Break up is most likely boost cut. Also, be wary of running cali 91 oct and overboosting
that limiter is the car hitting boost cut, because theres no restrictor ring in the exhaust it causes the the boost to spike past 14.7 psi. Need to put a restrictor ring back in. To run past 14.7 psi either replace the turbos with usdm twins as they have steel bearings instead of ceramics, get those twins rebuilt with steel bearings or go single turbo. 100% guarantee those stock jdm twins will blow if you go 17psi or higher
Your issue sounds exactly like the limp limiting mode when knock sensors go funky and/or coil packs go out. At least it’s really similar to the RB2xDET’s do
If the break up happened after the straight pipe then yeah it’s probably leaning out under boost..lack of back pressure i assume but I’m sure u will get a AFR gauge so if that’s the case then u know what to do from there
When it breaks up in my opinion I feel like the turbos might have a little bit of play and I’m pretty sure it doesn’t have a bov so the turbos waste pressure just goes back in to the turbo so the turbo has to chop it up at night pressures and you might also be running lean and the reason why I say it may not have a bov is cause my Supra didn’t come with one when it was stock
TJ that factory manifold is killing tons of noise, get a tubular manifold to the turbos, that’ll make it tons louder. Also twin turbos are much quieter than one.
Hey TJ, that stutter could be a missfire as well. On my R33 it had the same issue, found that i had a crack in the ceramic in spark plug no.3. I changed the spark plugs and upgraded to toyota yaris coil packs and didnt have the same problem again. My plugs are gapped to a .63 (metric) for a stronger spark
Breaking up is the spark plugs I’m almost deadset. My 32 gtr has a built engine and upgraded twins, after 2 years of sitting it sounded very similar in high end, the engine broke up and sounded very dull. Needed a tune and new plugs and it will sound more alive, but actual engine mods and a bigger turbo/more boost will give you what you expect from a supra.
Teej, been in your position with the same exact car. Your issue is the twins. Because your turbos are still sequential, second turbo is restricting all your flow (noise) When I went true twin turbo, noise significantly improved. A single will make your car unbearably loud now lol
I'm a new subscriber and I would just like to say that I give you guys much props for actually doing the work to the vehicles yourselves building your own Vehicles instead of buying a vehicle already built always remember built not bought
that sounds like a wastegate issue. your over boost, the the spring in the Wastegate could be to weak to hold boost. if not i know swapping a wastegate and BOV really helped mt turbo run better went from 12 PSI to 19 PSI and i needed a stronger spring in my Wastegate. hopefully this helps Doc
TJ, it’s got a muffler, you would be surprised how much that will muffle even an after market muffle. Straight pipe that and tune it and it’ll sound amazing and spit mad flames
The supra really doesn't even sound like a JZ. Idk about the 2JZ but on the 1JZs, there's a valve on the turbo manifold so one turbo will spool before the other. Then the valve opens to allow flow to the second turbo. I've seen that valve get stuck close or just not function. Check the valve and lock it open and you can get the real JZ noise.
To everyone saying its not straight piped because it still has a muffler, i dont really agree. In California the smog laws are insanely strict. When someone out here in cali says straight pipe, it usually means res and cat delete. And his muffler is a "straight through" design, it just has a fiber glass packing so it "muffles" the sound but has no restrictions. So technically it is still "straight piped".
Teeg I think the over boost is correct however I think ignition cut would be more accurate fuel cut would leave an even leaner condition causing fuel knock or ping. Not familiar with Toyota especially Supra (nice).needs the dyno and butt sniffer in pipe.
deep growl sounds good but i like too much louder.Maybe you can change all exaust system(going to some exxpensive)or you can change really high quality air intake system , wastegate , blow off valve ,aftermarket high quality spark plugs,injection system (bigger than stock one)etc. LOVES FROM TURKEY
get an aftermarket ecu like a haltech or get a fuel cut defender and boost cut defender. From personal experience though ide jump straight to a single turbo with open wastegate gate and screamer pipe and full 4 inch exhaust and then obviously with the aftermarket ecu and fuel system to back it up. You will not regret it.
Sounds like it’s hitting fuel or boost cut. Def should get a boost controller and a fuel cut defender. Do not keep getting on it letting it break up. Could cause detonation.
It still won’t be as loud because you basically have two resonators being stock twin turbo. They muffle the sound, going a bigger single turbo will make it louder with a 4” down pipe and 3” straight through exhaust
Hey TJ, the part you’re after is a greddy boost cut defender and also fuel cut defender. There are copies out there that do the same job. This will be due to higher boost as raddan said, the twins rely on that back pressure and is a common issue with aftermarket exhausts on stock twins. Also would recommend a boost controller and gauge so you can see what boost will actually spike to so you can limit it and not send your turbos into oblivion.
being a supra owner myself, by removing the cat you are running about 22psi of boost because there is no back pressure to regulate the boost. the breaking up your hearing is the car running to lean and fuel cutting. If you keep driving the car like that then you'll blow your turbos. Get a restrictor ring for the downpipe which will regulate your boost at 17.5-18psi and then get a mines ecu which is a plug and play ecu with a map for 17.5psi of boost. With this set up youll make about 400hp.
I'm more than certain it's just spark blowout. He just needs to gap the plugs smaller.
@@Creesic no this mans post is 100% correct
Creesic You completely ignored the (being a supra owner myself) I would much rather trust an owner of a Supra than someone who thinks it could be something.
He needs a fuel cut defender, uprated 255+ fuel pump and a restrictor ring and maybe an electric boost controller and set the boost to about 1.2ish bar
@@92ahmedr Japanese waste gates aren't big enough so Boost controller won't help
TJ you seriously need to read your comments dude. If it was as tough as you say it was to find. I told you the US and JDM front cat delete were different and where to find that in a previous video. Take advice from Supra owners. We’re here to help you. Also hopefully you saw my comment about the restrictor ring to prevent overboost. In the Supra community there are some that say you don’t need it but from my personal experience my stock twins went because I didn’t have one
Say it
TJ only Vlogs for views, he never reads his videos comments, you guys should know that by now
Hey Tokyo JZA80, which downpipe would you go with? I was confused for the longest time, because the HKS midpipe is called a downpipe on the internet, but it is not the whole thing. Apparently, HKS doesn't have an actual downpipe available. From this video, he's using an Autobahn88 downpipe. Never heard of it. I have the same exact exhaust that TJ has that I put on three years ago. HKS Carbon Ti. Unlike TJ, I will run a restrictor ring, I think between the 1st decat and the 2nd. I'd appreciate your help. Thanks.
He didn’t read it...
Tokyo JZA80 I have the same problem, should I try to get both cats or get the downpipe with the OEM cat?
Get your ak47’s out guys
The only thing remaining is a single turbo
BRAP
Sami PAPAPAPAPAPAPAPA
And the cams
not sure, he spent how much on a down pipe?
And stand alone with ignition cut limiter, and cams, and injectors...
on jdm supras the boost controller uses the cats to control boost. when you delete the cats on a jdm supra it tends to over boost. thats your issue
Car needs to become louder
Uses cats? like a variable ring or something? none of my supras are JDM or MK4s. just curious.
Was waiting for RX7 meat mount... straight piping the Supra is a good substitute tho.
i think he will get the meat in around a week
Jaco_sims that’s right he said that yesterday. Thanks amigo
On the jdm twins you will need some kind of restrictor ring or ecu to control boost because the turbos are ceramic and you dont want to push them past 17-18psi. You can install a HKS fuel cut defender to sort out your fuel cut issues as the ecu will cut fuel at around 12-13psi as a fail safe. I have just gone through the same thing on my jdm twin turbo supra.
Straight pipes don't have mufflers
TheKevo27 Yeah but true straight pipe is obnoxious
MD Supreme slap a single turbo on the 2j and its beyonce under the hood
Thank you straight pipe is just pipe no muffler
Yes he needs to get rid of that big exhaust tip muffler
I ran a 4inch straight pipe all the way back up until July. I personally loved the sound but it was so loud that sometimes we would get threatened about being kicked off the track. My sponsor ended up doing a down turn angle that helped out a little bit but then we went to the Sports Land Yamanashi track and got kicked off there for noise. Another sponsor came in and gave us a new titanium concept but I haven’t seen the car since I’ve been visiting in the U.S. I’m hoping the noise is more tame now.
AFTER YOU GET IT TUNED IT WILL SOUND GREAT TJ
Jason McMullen can’t tune stock ecu
Need a restrictor ring now... lol
A TUNE WON'T CHANGE THE SOUND
Jason McMullen tune it, tune it, tuna!🐟
Friend had the same sputtering issue turned out to be spark plugs
The Supra was the best decision of your life
Edit: besides asking Sabrina out. I can tell how happy you are with this purchase
david The awesome Rx7> Supra
Corey 01 ya
Due he didn't purchase sabrina 😂😂
@@r33hab82 he didn't say he did. He said asked sabrina out. Lmao read first then comment.
Maby sabrina asked him out
Love it! Few things tho for anyone doing BPU upgrades to their 2J's
1) upgrade to a 255+lph fuel pump to stop the engine from leaning out because of the extra boost
2) smaller gap spark plugs (.8)
3) the ecu will begin to cut fuel after 1 bar (14.7psi) as a safety precaution (note that the stock JDM twins can safely boost to 17psi) you'll need a fuel cut defender (hks)
Do all 3 of the above at the same time for best performance! Also note that if you delete all the cats (straight pipe basically;) ) then you'll overboost to about 19-20 Psi. Keep an eye on your boost gauge cuz if you keep boosting the stock JDM ceramic blades over 17psi then you'll wear them out A LOT FASTER!
min 1:40 and you can see already tj scraped the exhaust pipe.. what a chach
“iM tHiNKinG AbOUt KEpPinG tHE sUpRA sToCk” come on teeg, we know that thing is gonna be making some big power eventually
Nolan Canale 900whp by december.
Nolan Canale literally has already stated he’s not gonna keep it stock brah. Said it would be cool to keep it stock & in good condition but it would be funner to go full send.
Dusty240sx Im being sarcastic homie and funner isnt a word
@@nolancanale3518 Can't turn a noun into a comparative...
East Bay Angler huh?
Not straight piped, still have muffler. You have a cat and res delete.
Yeah these guys are clowns.
Matt Clairoux k?
Yup
100 percent straight piped with a muffler, running lean as fuck. All shit what a muppet.
Teej we need an FTB it’s been too long 😂
My Boi 100%😂
Truu
probably thinks its his way of staying healthy
My JDM 2jzgte did the same thing, it’s fuel cut. When you run a straight pipe exhaust without a restrictor you push past 14psi on the stock turbos and hit fuel cut via the ecu.
Dustin Craine will a fcd will work
Sound good Teej. Big part of the reason that it's still so quiet is because the factory turbos run in sequential mode, so until 4000rpm or so, all the exhaust essentially comes through only one turbo. 5 minutes with some vacuum tubing can convert it to a standard twin turbo configuration (often called TTC by Supra guys) which will make it much louder as well as get rid of the dip in power in the midrange. Down the road, running hybrid turbos in the factory spot in TTC mode means you could run 500+whp in a car that could look completely stock under the hood, preserving how clean it currently is and being a little more unique than a single turbo build
What ever happened to truck mods?
El_De_La_Lobo give me some suggestions bb
he was asking for suggestions on truck mods like one or two videos ago. Give him some ideas
Tj Hunt delete the truck and tune it best decision you’ll ever make
Straight pipe, egr delete, bigger injectors, bigger turbo. Fuel sump and fass. Just get more fuel and air in that boy
Tj Hunt you should get a nice exhaust for the truck
The breaking up is fuel cut. You get it on stock JZs when you remove the downpipe cat because the turbos regulate waste gate pressure from exhaust back pressure therefore it's over boosting. You can buy restrictor rings for them or you can get a decent boost controller to get round it.
This gonna be a STUTUTUTU Supra😍
*Accelerates* *BRAAAP PA* *AntiLag* *SUSSSTUTUUTU,*
Seth Drucker BWAAAAAAAAAAAAH
Thought i would join in. BARRRRRRRRRRRRRRRK, BARRRRRRRRRRRRRRK.
Brum?
Seth Drucker 200th like
you answered before i could. I was going to say it might be hitting fuel cut or boost cut. almost like the ecu hitting "rev" limit early. built in fail safes for fuel and overboosting. apexi used to make the SAFC for those guys running stock ecu's.
Blackwidowsupra vs TJ at the end of this build is a must
He moved and can't really come back to Cali with that car I heard. Not sure if it's true. But how he was talking about it he made it seem that way.
yeah Kyle lives in the Tampa area it still would be cool tho for them to meet up somewhere
Yes!
Yes, it would. I would love to see that. I would like to see Blackwidowsupra go head to head with this car out here in Maryland Called Alpha X. His car is so loud he broke my mic. The mic can't really pick how loud he is.
Black widow Supra is not allowed to go to Cali with the Supra if they pull him over in that car it’ll get impounded he has a state ref
Should've just built a custom 4" genuine straight pipe.
Obviously no back pressure with the aftermarket exhaust so without a tune it will breakup.
Emil back pressure is a myth
These cars don’t need a “tune” like modern ECU cars do. What he needs is a boost cut defender to bypass boost cut, and an electronic boost controller to control boost. No “tune” needed. (-previous MK3 Turbo and MKIV Twin-Turbo 6-speed owner)
@@Kevhoe true
You need to replace your spark plus and gap them down to .26, that will 110% fix your ignition break up. I’ve own 5 mkiv Supra’s, very common problem.
How is it straight piped with a muffler hanging out the back take the muffler off then it will be straight piped
It's a resignator
Check the spark plug gap!!! When I tuned my car the boost was blowing out the spark at higher boost levels, gapping the plugs smaller fixed it.
2jZ + Open Wastegate = Eargasm`
Hey Teeg
My understanding is as pressures increase, the need for a stronger spark increases. A local here is running stock ignition with 13 PSI no problem. As soon as he brings it to 15, it breaks up on him. Same thing with me, which is why I run an amp.
The density of the a/f I think at higher boost pressures causes the spark not to jump across the electrodes or at least avery weak spark. The voltage from the ignitor to the coils in stock form is too weak to do the job (in most higher boost cases)
Apathity I’ve been having this same problem with my Audi being fully straight piped and I hear it and feel it breaking up in hirer rpms at revs and driving. I changed to colder spark plugs and r8 coil packs seems to not changed anything
Calvin looking like a kid in that supra😂
Probably already been said but that break up is it hitting the 1 bar fuel cut. On a jspec (jdm) supra you need to run a restrictor plate in the exhaust when decatting. If you want it louder on idle and lower rpm look up ttc mode.
Loving the supra on the channel 👌
Yo you need a tune asap, people dont realize that uncorking a turbo car and straight piping it without a tune is its running lean guaranteed.
JZ's run a 10-11afr straight piped. It will be fine.. All JDM cars run extra rich from factory and Supras, JZX's and Aristros have self learning ECU's.
Except you can’t tune factory Ecu..
Bottom line car needs a tune running a straight piped exhaust no WAY around it ask any jdm engine tuner builder.
No exactly true, there more to it than “just tune it” as you will need a aftermarket Ecu, and trying to control factory twins is a headache. He needs to just get the boost cut defender/fuel cut defender to fix his issues.
You don't map a car for putting an exhaust on. He needs a restrictor ring to control the boost of the stock twins and a FCD if he wants to raise the boost. You do realise the JZ ECU's were pretty advance for their time? There are people running 800bhp on the factory ECU without a retune.
At 7:00, calvins face was like a kid waiting for his dad to say you did good son😂
I really don’t understand why everyone hates the blue TE’s lol. They’re different, I really like them.
Zynksx forreal, best wheels he’s ever had personally
Zynksx it’s a bad color combo with the black
Overated.swishers nah dude, it’s different, I love it, I do see your point but idk I love it
I was just thinking of how sick they would look on a sti with the black paint with the blue flakes
Just because its different doesnt make it a good choice...
If this is the same thing that I have on my 1JZ NON VVTI , what you are experiencing is boost cut, stock JZ's have a tendancy to go past the 14.3psi limit for the boost cut to engage, this is caused by your exhaust being bigger...
Tj got the juice maneee
iKillaFraud I peep that z32 my guy. Still waiting to find a clean TT with lower miles so I can fulfill my dream car craze
Dylan Slusher, my dream car is a R33 gts25t.
@@TRKxCLAN57 i got myself I rhd tt :) and yeah I also want a r33 gts25t all the Z32 owners i know want one too
As the owner of a RHD mkiv Supra, you need a restrictor ring between the downpipe and midpipe on JDMs. You're probably hitting like 22+psi and leaning out. If it's an ODB2 car, those have a lean spot also around 6000 rpm.
Fun fact jdm manual cars don’t need the clutch pushed in to start the car. Not just the Supra
Hey Tj at 7:45 you mention that you don't have the sound you want. If you want it to be loud you need to replace the Y-pipe coming off the turbos. The problem in doing this the turbos have so much room to breathe and the car will over boost. These turbos are sequential and recirculate. There is a way to bypass this and the turbos will spool faster.
trd wing and single turbo, all I have to say
It needs a single turbo, the exhaust manifold on the twin turbos are super restrictive, also like you said its hard to get sound out of 2 baby turbos. Also doing any mods to a turbo car without tuning is very dangerous.
How do pass cali smog for all these straight pipes?
Zach Beydoun you know a guy who will pass it for you if you slip him some money
Most 90's Toyota's had boost cuts up around the 14psi if you don't just hit fuel cut beforehand. If you want a quick fix you can buy a HKS Fuel Cut Defencer for around $130, it helps raise the factory fuel cut level. Don't know if factory wastegate puts it higher than available fueling but should be fine.
(Still needs more loud) but FINALLY this was probably the first thing I said you should have done when you wanted to do an “exhaust” but put that Prius exhaust on the supra instead 😂🤦🏽♂️🤷🏽♂️
The car is leaning out mate and chances are you’ll blow your twins up pritty quickly if you leave it like that. You need a restrictor ring for the exhaust as JDM twins have ceramic internals that cannot handle the boost pressure your straight pipe is allowing them to reach. I also recommend closer gapped spark plugs. You will also 100% need a fuel cut defender. HKS make these. I have one in my 93 TT6. A 4” front mount intercooler will also help the car to breath much better. This will all bring you to what we call BPU which should give you around 400hp. Invest in a ECU that’s tuneable like a Mines or in my opinion a syvecs and you should squeeze around 430-450hp. (At this power however your twins will be on borrowed time. But when look on the bright side, when they die there’s no better excuse for going single)
Its not supra specific that you don't need the clutch engaged to start up, it's Japanese cars in general.
actually is 15+ years old cars in general
My 97 m3 starts without the clutch being in, same with my 70 chevelle. Its just older cars
Pre OBD2
mark culp not true lol
In the UK most cars don't need clutch to start. I got a JDM DC5 which is my first car that needs clutch
Full 3.5in piping full straight pipe no muffler just straight out the back polish the piping so it looks nice itll sounds amazing
The wheels are starting to grow on me tbh.
Taran Panduranga yup same here, it takes time tbh
Sounds amazing. Not loud but nice, perfect even. Can be roudy when she wants too but descrete when she needs too
Don't keep doing pulls with it running bad breaking up you'll end up breaking something like
Jonny 250 like what?
Jo Louie
Jonny 250
Actually that’s how you blow turbos
Over boosting
In the 335i world the first things to check would be spark plugs, coil packs then injectors but the n54 is DI so not 100% sure if PI will have the same issues.
Get a intake system
You have a higher flow of air leaving the engine without thinking about the flow of air and burn in the engine. My advice is a hi flow intake a new fuel rail with higher rating injectors also tuning is key.
sounds like a 5vz-fe
😂😂 he's right 😂😂 the 3.4L 4runner with a flowmaster 😂
Austin Grullon
Those are amazing swaps for mr2’s
Connoisseur Of Cars Tig Ol Bitties & VJ’s have u seen a 2gr in a mr2 😂
Over boosting because having the catless downpipe you need a tune with it I went through the same problem. Eventually you want to get a new ecu the stock ecu isn’t that smart lol.check you coils and spark plugs. Once you get it tuned it will solve the over boosting problem
Dayummm
Miquel Jones your 1st
Same thing just happened to me, I have a 2003 vw Gti and I had the muffler and res removed. It would make the exact “backfire” noise. My spark plugs were the only thing wrong. I had a misfire and I had already assumed that it was running lean or rich.
"I hit it last night.." 4:02
"Did you get that nut off that stud.." 4:05
:o!
if you pause at 0:25 the blue rim tape on the fd wheels looks sick, i actually recon that blue lips would have looked awesome dude.
Why does it have to be so loud? It’s nice as it is
Needs a deeper tone
He wants to rice it out
Jack Morton you don’t know what rice is
Because racecar.....I guess lol. I liked it the way it was.
I thought TJ said he’d keep it stock as much when he got it. Guess he changed his mind
I had the exact problem with the sputtering under heavy load on my r34, I tried swapping in LS coils, new plugs, checked my fuel pump...at the end it was just the cam/crank angle sensor.
Sell that Supra. N buy beater Supra u can build from ground up
BLACK SANTA That’s just ridiculous, no hard feelings bro.👍
Sergio no it’s because he has to keep everything stock
BLACK SANTA Who said that?
Sergio he did because soon as he wants a widebody or something everybody gone start crying ITS A CLEAN SUPRA DONT RUIN IT
It’s not that, he’s just experimenting and taking the build slowly. Later on, tj will probably go big with a fair sized single turbo swap but nothing too ridiculous to keep the value of the car. He definitely won’t do any cutting on the body but it’s going to be a nice supra build... just give him time
You can get a Fuel cut defender but it will just fool the ecu and is not a good course of action unless you have some method of adding some more fuel where its needed. Why fit autobahn88 parts, I thought this build was going to be well thought out?
Just the fact that you continually say "straight piped" and it has a muffler proves what kind of car guy you are......or aren't. Please, keep doing pulls so you blow the 2j up because you don't understand what changing exhaust does to a car.
Try a researching a fuel cut defender for the supra. Decatting a FC rx7 required this little plug and play box as the FC would do the exact same thing under boost in the upper rpm range.
My civic sounds louder
hey brother i just started youtube is there anyway you can check me out and show the channel some love!? thnxs for your time bro!
Chuck a set of brand new spark plugs in, and gap then correctly. It sounds like you are losing spark on a cylinder or two. I've had this happen before and it was only up too in the rpm the problem happened because of incorrectly gapped spark plugs.
I had that problem on my R33 skyline where if I hit a certain RPM it sounds like it's hitting limiter and stuttering, a simple coil pack upgrade and spark plug change made it like new if not better.
Sounds like a bad coil or plug so ur getting a misfire maybe. Thats exactly what happened in my b7 audi a4. Sounded exactly the same. Changed out all my coils and spark plugs and fixed the issue. Hope this helps
Yo my man where did you buy the pipe I can’t find one
Intake, single turbo and 6 boost manifold, external waste gate w:/ screamer pipe and you’ll have your desired sound.
That sputtering noise means you need to do a tune up. Change spark plugs and coils. Had the same issue when my sc300 valve cover gasket flooded my spark plugs
JDM supras have ceramic turbines. Running your exhaust without a restrictor ring will allow turbos to overboost which will lead to the ceramic blades failing. Break up is most likely boost cut. Also, be wary of running cali 91 oct and overboosting
that limiter is the car hitting boost cut, because theres no restrictor ring in the exhaust it causes the the boost to spike past 14.7 psi. Need to put a restrictor ring back in. To run past 14.7 psi either replace the turbos with usdm twins as they have steel bearings instead of ceramics, get those twins rebuilt with steel bearings or go single turbo. 100% guarantee those stock jdm twins will blow if you go 17psi or higher
Your issue sounds exactly like the limp limiting mode when knock sensors go funky and/or coil packs go out. At least it’s really similar to the RB2xDET’s do
If the break up happened after the straight pipe then yeah it’s probably leaning out under boost..lack of back pressure i assume but I’m sure u will get a AFR gauge so if that’s the case then u know what to do from there
When it breaks up in my opinion I feel like the turbos might have a little bit of play and I’m pretty sure it doesn’t have a bov so the turbos waste pressure just goes back in to the turbo so the turbo has to chop it up at night pressures and you might also be running lean and the reason why I say it may not have a bov is cause my Supra didn’t come with one when it was stock
TJ that factory manifold is killing tons of noise, get a tubular manifold to the turbos, that’ll make it tons louder. Also twin turbos are much quieter than one.
Hey TJ, that stutter could be a missfire as well. On my R33 it had the same issue, found that i had a crack in the ceramic in spark plug no.3. I changed the spark plugs and upgraded to toyota yaris coil packs and didnt have the same problem again. My plugs are gapped to a .63 (metric) for a stronger spark
Breaking up is the spark plugs I’m almost deadset. My 32 gtr has a built engine and upgraded twins, after 2 years of sitting it sounded very similar in high end, the engine broke up and sounded very dull. Needed a tune and new plugs and it will sound more alive, but actual engine mods and a bigger turbo/more boost will give you what you expect from a supra.
Teej, been in your position with the same exact car. Your issue is the twins. Because your turbos are still sequential, second turbo is restricting all your flow (noise)
When I went true twin turbo, noise significantly improved. A single will make your car unbearably loud now lol
I'm a new subscriber and I would just like to say that I give you guys much props for actually doing the work to the vehicles yourselves building your own Vehicles instead of buying a vehicle already built always remember built not bought
that sounds like a wastegate issue. your over boost, the the spring in the Wastegate could be to weak to hold boost. if not i know swapping a wastegate and BOV really helped mt turbo run better
went from 12 PSI to 19 PSI and i needed a stronger spring in my Wastegate. hopefully this helps Doc
6:30 for anyone who is like me and can't wait to hear supra revs
TJ, it’s got a muffler, you would be surprised how much that will muffle even an after market muffle. Straight pipe that and tune it and it’ll sound amazing and spit mad flames
The supra really doesn't even sound like a JZ. Idk about the 2JZ but on the 1JZs, there's a valve on the turbo manifold so one turbo will spool before the other. Then the valve opens to allow flow to the second turbo. I've seen that valve get stuck close or just not function. Check the valve and lock it open and you can get the real JZ noise.
To everyone saying its not straight piped because it still has a muffler, i dont really agree. In California the smog laws are insanely strict. When someone out here in cali says straight pipe, it usually means res and cat delete. And his muffler is a "straight through" design, it just has a fiber glass packing so it "muffles" the sound but has no restrictions. So technically it is still "straight piped".
Teeg I think the over boost is correct however I think ignition cut would be more accurate fuel cut would leave an even leaner condition causing fuel knock or ping. Not familiar with Toyota especially Supra (nice).needs the dyno and butt sniffer in pipe.
You need to get a 1bar restrictor plate and a boost controller to keep the boost below 1.2bar. Trust me I owned a 93 tt6 here in the U.K.
deep growl sounds good but i like too much louder.Maybe you can change all exaust system(going to some exxpensive)or you can change really high quality air intake system , wastegate , blow off valve ,aftermarket high quality spark plugs,injection system (bigger than stock one)etc. LOVES FROM TURKEY
get an aftermarket ecu like a haltech or get a fuel cut defender and boost cut defender. From personal experience though ide jump straight to a single turbo with open wastegate gate and screamer pipe and full 4 inch exhaust and then obviously with the aftermarket ecu and fuel system to back it up. You will not regret it.
Sounds like it’s hitting fuel or boost cut. Def should get a boost controller and a fuel cut defender. Do not keep getting on it letting it break up. Could cause detonation.
Hey tj I own a 1990 Supra with a 1jz and my problem was with the spark so check coil packs and spark plugs, mine ended up being the coil packs.
It’s used to Japanese gas and it’s high octane level. Go with new plugs, and tune it for California 91oct
If it's losing power then check the spark plugs and or any spark plugs coils and most of all tune it
It's the HKS FCD they use to raise the fuel cut, had one on my jzx and worked fine
Spark plugs! I had that problem with my Mercedes E300 😊 came back, and is was the plugs again
Make sure to delete sequential turbo system. It requires swithcing around of some vacuum lines that's literally it. Motion auto tv has a video on it.
Change the spark plugs to 1 range colder & close the cap by .2 of a millimetre this should help with the breaking down of the ignition
It still won’t be as loud because you basically have two resonators being stock twin turbo. They muffle the sound, going a bigger single turbo will make it louder with a 4” down pipe and 3” straight through exhaust
Hey TJ, the part you’re after is a greddy boost cut defender and also fuel cut defender. There are copies out there that do the same job. This will be due to higher boost as raddan said, the twins rely on that back pressure and is a common issue with aftermarket exhausts on stock twins. Also would recommend a boost controller and gauge so you can see what boost will actually spike to so you can limit it and not send your turbos into oblivion.