Fun fact, big exhaust isn't just about top end power. Its part of the wizardry that lets a big cam engine make power off the bottom. NA tuning can suck at times, but dont give up. The ones that make it look easy will have had years of development, or have got very very lucky. 180hp is doing pretty good.
Do you think I’m wasting my time with the 60mm fujitsubo exhaust? I made this video hoping to get advice from you, if you think I have a shot at 150kw I’ll purchase the fujitsubo exhaust tonight.
Definitely a step in the right direction over the 2" setup, way back my starlet originally had a 2" system. going to 2.5" was big gains. stepping up to 3" not so much but was there. this was when it was making a lot less power, less than yours, but had big cams. the big gains weren't so much top end power but down in the 4-5000rpm range. which transforms the way they drive on the street. when im talking exhaust i'm not talking directly off the header either. my current setup runs a 2" choke point and some other stuff, before goes to 3" going big in the correct place lets parts in front of them do there thing. the back half is merely there to make it to the back of the car and to shut it up
I agree - whats 20bhp when that gain will only be seen above 7k at great expense.. if your not happy with 180 will you be happy with 200? Whichever route you choose do what makes YOU happy 👊 love the build man 💯
Exactly, I’m actually very happy with 180hp, the car is so much fun and can keep up with most mild turbo cars. It’s just a matter of making it better and I’m just playing the numbers game at the moment
I used to do 1300 cc bracket racing, I chased the exhaust unicorn on a flow bench to find the magical scavenge moment. Personally, I never found more than 2-5 hp. And I'm pretty sure when I did find that. It was more likely changes in ambient temperature. Even putting a large vacuum on the exhaust. Other than additional heat removed did not give noticeable improvement. Focus on fuel and cooling the air. Garage 4age is who I would be mimicking. Come to New Zealand and do a Collab with them.
A New Zealand trip sounds awesome! I’d might come back with a kp61😂 Chasing NA power is just time and money, I’m probably gonna end up developing a long lasting relationship with my local dyno owner
@@fuzzayd4601 I think I know who you’re talking about, is that the guy who was in a speedhunters article If so I’d certainly do a video with him if he’s up for it
Good luck Niko I was not so detailed on the exhaust, but I concurred with you. I had a similar situation , that I want to improved, first I need to improved my intake and the velocity stacks, then the exhaust. But , all in all , following your project.
Man, I had the same issue in my AE86 project. I have a 4age 16v small port with 284/278 camshafts, 20v ST ITBs, 12:1 CP pistons, Martelius Group A XL header with 57mm output. The car made 167whp on Dynojet with the custom 57mm pipe. I keep the same header but changed the exhaust system to a Matelius High Output OverAxle 2.5" (63.5mm) and I could notice the difference immediately when driving it, I felt it with more power throughout the powerband. I will soon return to the dyno to see how it improved in numbers. What surprised me is that it became quieter than with the 57mm pipe.
Easy way before spending heaps is to make up a 60mm side exit. Take it to dyno, power run it. If it's material then 2.5 or 3 inch is the jam. 3 inch with vibrant resos and mufflers sound really good and not mega loud.
Good call with the side exit but I think I’m gonna dyno it with the exact setup I wanna run. Vibrant is a good option I also wonder if it would be worth running a second muffler if I could fit it somewhere
@NEVER-LIFT I have run 2.5" on everything since the dawn of time to keep noise down - NA, supercharger, turbo. My buddy with a 200hp 1nz echo went to a 3inch and that was perfect. And all the 2zz boys run 3inch for most power. It will be a combo of 2 reso 1 good muff or 1 res, 1 small muff and one large rear. Mild steel pipe if not wanting to send up large. I'm about to change mine to 3 inch so am in the same boat but am supercharged at the minute. I'm old and don't like too much noise.
@@Garage_Dorihopefully you get it sounding reasonable, I’ve always wanted quite exhausts even when I was a teenager. The only time I’d consider an aggressive build would be for a dedicated track car.
little reminder that the formula atlantic 2.5" exhaust that made 280 crank is only a couple inches long, the longer the exhaust, the more restriction. I would likely think that the 60mm (2.3") wont be able to make the power you are looking for. you could probably get away with it if it was super short but not at the length that ae86's have. for the cost of 3,000 you should be able to have a custom exhaust made with a resonator and muffler that makes the power you look for. You may want to have your current header modified so that it doesnt neck down quite so much before expanding back out to your final size. As someone else wrote here, id follow garage 4age and his methods on exhausts Loving all the content recently!
This is exactly what I’m thinking, I’ve had multiple people suggest just running a short side exit or no exhaust on the dyno but although that would be great to see what the car can do I totally agree with you. Once the exhaust goes on it’ll change everything
i think one of the main reasons G4A makes so much is the revs, massive cams and comp ratio. If i remember correctly its peak power was 9000 rpm 💀not too mention the wizardry he has with the BMW itbs and stepped headers
@@aergaetrhethaergertha2099 I’d be ok with making less power than him I he’s producing 220hp which is 20hp more than my goal. But yes you’re definitely correct, NA 4age power is usually made with rpm
2.3l Duratec, NA, 2 1/4" Exhast, 50mm ITB´s, running a very large airbox and two large silencers (89 Decibel), 276 DIN PS at the crank in a mk1 Cortina.
3" seems excessive for an N/A street engine of this capacity, and the drone will be miserable. My vote is the 60mm exhaust and fit your Atlantic throttles, surely someone would buy your 20v ITBs and SQ manifold?
I agree with 3 inch being excessive but if I can’t make the power any other way I’ll probably try it. I was laughing when all the exhaust sizing charts I found wouldn’t go down to 1.8 litre
I run a 3 inch exhaust on my ae86 but its turbo. If it's low getting it over the diff will be pretty tricky. Why not just test it with a short 3inch exhaust off your current header. Just a short pipe so its cheap and simple to fab. You could do the same with a 60mm. See which one makes the power you want. Then Decide what exhaust is best.
Yeah that’s definitely an option, I have had a few people say a side exit exhaust would be cool but I’d like to dyno the car with the exact setup I wanna run.
Id say go for the 60mm exhaust first as your right there nearing your goal of 200hp, But also those trd throttles have to be installed sooner than later lol that will look incredible in the engine bay. What do the trd throttles have over the 20v blacktop throttles?
The Atlantic throttles have a much larger diameter, I haven’t measured the difference but when you hold them side by side it’s noticeable. I was planning on saving the TRD throttles for my next engine build but you’re right, the temptation to just install them is real
@@NEVER-LIFToh so probably louder induction noises too😮 deng lol. Being a 7ag tho hopefully itll retain good bottom end, theres a build built by hasselgren that i think has 300hp but its all top end and was a pig on the street ive heard
@@NEVER-LIFTyea its the one with the gantry injection theres videos of it on the internet, cmautohaus did a build break down and drag raced it on his youtube channel with his itb cammed 16v it was neck and neck lol
Yeah i think for the time save and install and price the 2.5 wins the 3 inch is a lot of work and fab work in Sydney is not cheap parts of the shelf can be big savings and if it doesn’t work you can prob get most of your money back selling second hand. I am jealous of the trd itbs lol..
few times polisihing intake/head the power go down... 2.5" pipe on many rally cars here and over 200hp easy. 3" over axle is really TIGHT fit.. 2.5" i have few corollas, that fit and sound nice. and rallycars here use similar pipe but not stainless i think in uk and us have also "martelius exhaust"
Re: 180hp ---> 200hp step, you said you had excessive crankcase pressure? How's your compression/piston & rings looking? I'd compression test and make sure that my bottom end was healthy before bolting on extras onto an engine that just doesn't deliver the goods
Itb’s for another future project, I say 200 is the goal right now. If loud exhaust is too much, but the 200hp is hit, atleast you cansay you hit it and pulled it back to make the car bit more liveable.
I think your header runner diameter may be the limiting factor in your system. Not sure if you mentioned your current runner diameter but I believe using a 1.75 inch runner should solve your issues and allow you to rev further and produce more peak power
My current runner diameter is 45mm or 1.772in which is very close to Mirls Atlantic header that made 280hp It’s also comparable to Mirls header as they are both 4-2-1
For shits and giggles I'd keep the current header, do an expansion chamber from header up to 3" run 3" pipe for 3/4 of the system and then start stepping down diameter at 1st muffler to smaller diameter again at 2nd muffler or a hot dog and smaller tip. At least with a 86 you got length in the system to play with. HK$ used to do this with larger diameter at headers stepping back down to smaller diameter. Hot exhaust gasses need the diameter to escape, but as the gasses cool through the system the diameter can be brought back down. Benefit of that is not having a loud obnoxious wet fart sounding exhaust that still flows. We all know what happens when you go the opposite with a smaller to larger system, insert milo tin fart can here... 🤣 I make my own exhausts, so that keeps costs down to just buying the materials to experiment with. That's if you're into that sort of thing, I enjoy "bending air" for the sake of experimentation and learning. Not everything has to be as everyone else does. In other words, no I cannot give you a definite comment on what might work.. 😋
I might have to learn how to weld soon and experiment with exhaust variations It’s actually difficult to see in the photos but my toda headers have a bottle neck after the final collector. I imagine they did that for a reason and I did recently watch a video of a guy who made his exhaust sound like an f1 by stepping down the primaries. So many possibilities
Is a 60mm exhaust going to give you power? Most probably... Is it going to get you to 200hp? I'm almost sure it won't. So the real trick is if those up to 5-...10?hp (account other variables, especially if you're making some changes to the injectors, etc) are worth 1500 AUD. I've always used a 60mm catback, except when for a very reasonable 150 USD I tried the stock AE86 exhaust for being low key back when I had the mild-tuned 16v. With my current mid-built blacktop I've had two different 60mm catbacks: an HKS HiPower and a Brave exhaust. Max difference they had was a 1.5hp difference on the dyno (if at all), tested back to back. I kept the HKS for a cleaner sound. A custom exhaust is never going to be as well developed and "sound engineered" as an off-the-shelf part. The Brave, as much as it looked like a 60mm version of the Fujitsubo (I always really liked the finish and "OEM look" and always had one on my sights but the 50mm kept me away), sounded raspier. This also comes down to the materials used, and even though the HKS is mild steel, it had the best hp and nicer sounding (IMO) note. For contrast, the titanium Tomei ones sound rough as hell, and I'm not particularly impressed with their performance on either design (they provide a comparison vs a literally very rusted Toyota stock exhaust). But the weight advantage is substantial. It's just not a streetable setup I'd ever consider, and probably neither for a track-only, as I'm not convinced on the power gains. You could also consider a middle of the road which might be ideal for you. There's also a 60mm HKS "Sport" which literally only changes the back section from the HiPower with a more "OEM look" silencer. I think this could be a real option if the price in AUS is right. Regardless, I'm pretty sure you'll be able to find either the Sport or HiPower for closer to half the price of the TECARTS one. Speaking of TECARTS, I've always been intrigued with their HP ratings. It seems to me they're estimated crank numbers, as they claimed high numbers when they raced in the N2 AE86 series in Japan, but I never saw their cars with higher top speeds or any particular straight line advantage. Also, their claimed 217PS build for Tsuchiya's car vs TRD's Sakurai "stock but blueprinted" 20v which was rated about 170-180hp had, even with the advancement of the newer tire compounds from the Yokohama A048 to whichever new-then Hankook "S-tire" had when they lapped at Tsukuba... a single tenth of a second faster a decade later. Somehow I'm at best dubious with their claims. If you want to discuss this further or have my take on my own dyno experience on exhausts and 86s, hit me up on Instagram with the same username. Great content, dude. Cheers!✌
Hey mate I was building my 7age at the same time as your videos of your build were put up with the same goal of 200hp. Will it make it who knows should go very close gets tuned in 2 weeks. Very similar build to yours, unsure of what cams your running. Im running same headers but my exhaust is 2.5" titanium over diff, 3" over diff would be incredibly hard.
Hey brother. When I talked to MRP about making 200whp on a 7A he made it clear that BT throttles won't cut it. I can't confirm or deny if it's true because I haven't decided to go for 200whp due to class restrictions but I would put on those TRD throttles 100%
Very interesting, hopefully with a little time someone will be able to confirm what Barry told you. If so I think the TRD throttles would be the answer
Can't say exactly when 45mm blacktops will become a restriction. with 2mm oversized 47mm plates, they will do 150kw no problem. confirmed by switching to 52mm throttles and it made the same power. a 40mm runner in front of the throttles will limit power into the 130-140kw range. so you can start to see how a silvertop 43mm throttle would be a no go and 45mm blacktop getting borderline heading towards 150kw. taking into account the throttle plate
3" pipe is ridiculous on a wee 4cyl. Thats mild V8 size. Why dont you go back to the dyno, unbolt the exhaust at thw back of the extractor and see what it makes with all restriction removed. It kinda seems like you are guessing as to what the restriction is? Is the engine worn out? Maybe thats why its puking with blowby? Id hire the dyno out for a day and test test test. You can weld some barbs to the exhaust and do a dyno run with a boost gauge connected at various points and see exactly how much restriction it has.
I wish I took the time to unbolt the exhaust when we tuned it the first time If I did there would be much less guessing now Hopefully I’ll get it all sorted soon, thanks for the advice
A New Zealand trip would be awesome! I might come home with a kp61😂 Chasing NA power is just time and money at the end of the day, I imagine I’m probably gonna develop a long lasting relationship with my local dyno owner
Do it!! If you make it to Wellington hit me up so you can come check out my slow going 7agte ke30 build 😉 thanks for the videos brother. Your content has got me back into my car after years of it sitting in the garage
150KW/201HP is a hard nut to crack, my 5AGZ SC is kind of a disappointment but I never really finished it or tuned it. I don't have much first hand knowledge but Garage 4AG (ruclips.net/video/99JlMhbA-vc/видео.html) has done a ton of Dyno testing
@@Garage_Dori I love the fact that I did it (great fun) but if I had not gotten all the parts cheap I would not recommend it. I also had a 88 CRX D16 race car and it would run circles around my GZE (so to speak)
20hp gain for an all motor application s a lot @nyal1988, you should try using a Short pipe for a dyno run , then you will figure out if that's where your restriction is at. I have a stock 4age20v bt with bolt ons stock ecu and SAFC for fueling, and its making 160hp at the wheel with a 2.25 exhaust, in other words not all the builds are the same, you have to try a few things to know which one your engine likes..
100% Ive seen people spend crazy time and money on NA tuning just to gain 5hp I’m just banking on the fact that we haven’t yet seen what my 7a is capable of. It could end up being a very long road to 200hp
Fun fact, big exhaust isn't just about top end power. Its part of the wizardry that lets a big cam engine make power off the bottom. NA tuning can suck at times, but dont give up. The ones that make it look easy will have had years of development, or have got very very lucky. 180hp is doing pretty good.
Do you think I’m wasting my time with the 60mm fujitsubo exhaust?
I made this video hoping to get advice from you, if you think I have a shot at 150kw I’ll purchase the fujitsubo exhaust tonight.
Definitely a step in the right direction over the 2" setup, way back my starlet originally had a 2" system. going to 2.5" was big gains. stepping up to 3" not so much but was there. this was when it was making a lot less power, less than yours, but had big cams. the big gains weren't so much top end power but down in the 4-5000rpm range. which transforms the way they drive on the street. when im talking exhaust i'm not talking directly off the header either. my current setup runs a 2" choke point and some other stuff, before goes to 3" going big in the correct place lets parts in front of them do there thing. the back half is merely there to make it to the back of the car and to shut it up
Legend, thanks mate that’s exactly what I needed to hear
I’ve made up my mind now
Use a 2.5 inch!
I agree - whats 20bhp when that gain will only be seen above 7k at great expense.. if your not happy with 180 will you be happy with 200? Whichever route you choose do what makes YOU happy 👊 love the build man 💯
Exactly, I’m actually very happy with 180hp, the car is so much fun and can keep up with most mild turbo cars.
It’s just a matter of making it better and I’m just playing the numbers game at the moment
I used to do 1300 cc bracket racing, I chased the exhaust unicorn on a flow bench to find the magical scavenge moment. Personally, I never found more than 2-5 hp. And I'm pretty sure when I did find that. It was more likely changes in ambient temperature. Even putting a large vacuum on the exhaust. Other than additional heat removed did not give noticeable improvement. Focus on fuel and cooling the air.
Garage 4age is who I would be mimicking. Come to New Zealand and do a Collab with them.
A New Zealand trip sounds awesome!
I’d might come back with a kp61😂
Chasing NA power is just time and money, I’m probably gonna end up developing a long lasting relationship with my local dyno owner
@@NEVER-LIFT if you do a nz trip you have to try meet up with steve wilcock. Hes got heaps of the formula atlantic shit and a bunch of n2 ae86s
@@fuzzayd4601 I think I know who you’re talking about, is that the guy who was in a speedhunters article
If so I’d certainly do a video with him if he’s up for it
Good luck Niko
I was not so detailed on the exhaust, but I concurred with you. I had a similar situation , that I want to improved, first I need to improved my intake and the velocity stacks, then the exhaust.
But , all in all , following your project.
Cool hopefully my experiences can help you make a decision in the future 👍
Man, I had the same issue in my AE86 project. I have a 4age 16v small port with 284/278 camshafts, 20v ST ITBs, 12:1 CP pistons, Martelius Group A XL header with 57mm output. The car made 167whp on Dynojet with the custom 57mm pipe. I keep the same header but changed the exhaust system to a Matelius High Output OverAxle 2.5" (63.5mm) and I could notice the difference immediately when driving it, I felt it with more power throughout the powerband. I will soon return to the dyno to see how it improved in numbers. What surprised me is that it became quieter than with the 57mm pipe.
To deal with the drone I understand that the most important thing is a good combination of muffler and resonator.
That’s very interesting, you gotta reply to this comment when you get around to tuning it
Seems like anything is better than what I’ve got
Agreed but you don’t know what you’re gonna get until it’s done, so it may take a few goes
You could try an open header with the what you have to see if that picks up anything
@@TurbineResearch I honestly should have done that the first time it was on the dyno, thanks for the suggestion bro
Easy way before spending heaps is to make up a 60mm side exit. Take it to dyno, power run it. If it's material then 2.5 or 3 inch is the jam. 3 inch with vibrant resos and mufflers sound really good and not mega loud.
Good call with the side exit but I think I’m gonna dyno it with the exact setup I wanna run.
Vibrant is a good option I also wonder if it would be worth running a second muffler if I could fit it somewhere
@NEVER-LIFT I have run 2.5" on everything since the dawn of time to keep noise down - NA, supercharger, turbo.
My buddy with a 200hp 1nz echo went to a 3inch and that was perfect. And all the 2zz boys run 3inch for most power. It will be a combo of 2 reso 1 good muff or 1 res, 1 small muff and one large rear. Mild steel pipe if not wanting to send up large.
I'm about to change mine to 3 inch so am in the same boat but am supercharged at the minute. I'm old and don't like too much noise.
@@Garage_Dorihopefully you get it sounding reasonable, I’ve always wanted quite exhausts even when I was a teenager.
The only time I’d consider an aggressive build would be for a dedicated track car.
little reminder that the formula atlantic 2.5" exhaust that made 280 crank is only a couple inches long, the longer the exhaust, the more restriction. I would likely think that the 60mm (2.3") wont be able to make the power you are looking for. you could probably get away with it if it was super short but not at the length that ae86's have. for the cost of 3,000 you should be able to have a custom exhaust made with a resonator and muffler that makes the power you look for. You may want to have your current header modified so that it doesnt neck down quite so much before expanding back out to your final size. As someone else wrote here, id follow garage 4age and his methods on exhausts
Loving all the content recently!
This is exactly what I’m thinking, I’ve had multiple people suggest just running a short side exit or no exhaust on the dyno but although that would be great to see what the car can do I totally agree with you. Once the exhaust goes on it’ll change everything
The OEM BT ITB's start being a restriction around 185whp+, those TRD throttles should help.
i think one of the main reasons G4A makes so much is the revs, massive cams and comp ratio. If i remember correctly its peak power was 9000 rpm 💀not too mention the wizardry he has with the BMW itbs and stepped headers
@@aergaetrhethaergertha2099 I’d be ok with making less power than him
I he’s producing 220hp which is 20hp more than my goal.
But yes you’re definitely correct, NA 4age power is usually made with rpm
2.3l Duratec, NA, 2 1/4" Exhast, 50mm ITB´s, running a very large airbox and two large silencers (89 Decibel), 276 DIN PS at the crank in a mk1 Cortina.
Wow that’s great info thanks for sharing
How hard did you rev it?
@@NEVER-LIFT The limiter is sat at 7200 just over the hump in the torque curve.
Dont think the original crank will take any more than that.
3" seems excessive for an N/A street engine of this capacity, and the drone will be miserable.
My vote is the 60mm exhaust and fit your Atlantic throttles, surely someone would buy your 20v ITBs and SQ manifold?
I agree with 3 inch being excessive but if I can’t make the power any other way I’ll probably try it.
I was laughing when all the exhaust sizing charts I found wouldn’t go down to 1.8 litre
@@NEVER-LIFT haha yeah most N/A performance info online is aimed at 6s/V8 muscle cars hey.
I run a 3 inch exhaust on my ae86 but its turbo. If it's low getting it over the diff will be pretty tricky. Why not just test it with a short 3inch exhaust off your current header. Just a short pipe so its cheap and simple to fab. You could do the same with a 60mm. See which one makes the power you want. Then Decide what exhaust is best.
Yeah that’s definitely an option, I have had a few people say a side exit exhaust would be cool but I’d like to dyno the car with the exact setup I wanna run.
Id say go for the 60mm exhaust first as your right there nearing your goal of 200hp, But also those trd throttles have to be installed sooner than later lol that will look incredible in the engine bay. What do the trd throttles have over the 20v blacktop throttles?
The Atlantic throttles have a much larger diameter, I haven’t measured the difference but when you hold them side by side it’s noticeable.
I was planning on saving the TRD throttles for my next engine build but you’re right, the temptation to just install them is real
@@NEVER-LIFToh so probably louder induction noises too😮 deng lol. Being a 7ag tho hopefully itll retain good bottom end, theres a build built by hasselgren that i think has 300hp but its all top end and was a pig on the street ive heard
@@ManjiMachine wow I haven’t heard about that one
@@NEVER-LIFTyea its the one with the gantry injection theres videos of it on the internet, cmautohaus did a build break down and drag raced it on his youtube channel with his itb cammed 16v it was neck and neck lol
@@ManjiMachine cool I’ll check it out 👍
Yeah i think for the time save and install and price the 2.5 wins the 3 inch is a lot of work and fab work in Sydney is not cheap parts of the shelf can be big savings and if it doesn’t work you can prob get most of your money back selling second hand. I am jealous of the trd itbs lol..
I think off the shelf is the way forward, hopefully it does what I want
Are they the barrel type throttle bodies?
No just normal style throttle plates
few times polisihing intake/head the power go down... 2.5" pipe on many rally cars here and over 200hp easy. 3" over axle is really TIGHT fit.. 2.5" i have few corollas, that fit and sound nice. and rallycars here use similar pipe but not stainless i think in uk and us have also "martelius exhaust"
That’s very interesting, did you make that power with a naturally aspirated 4age?
all usual rallycars are like "stock" na if was genuine.. over 200hp all better drivers. and 2,5" exhaust whit custom manifolds 1600cc
Re: 180hp ---> 200hp step, you said you had excessive crankcase pressure? How's your compression/piston & rings looking? I'd compression test and make sure that my bottom end was healthy before bolting on extras onto an engine that just doesn't deliver the goods
It's healthy it poped the dipstick on limiter 😅
@@r2dter hopefully with the larger breathers it’ll be ok now, it won’t hurt to double check the compression again
@@mtperformanceengines3508 bahaha convenient oil pressure sensor pickup point then😆
@NEVER-LIFT we should do a leakdown and comp test video to prove the motors health 😂
@@r2dter 😂
Itb’s for another future project, I say 200 is the goal right now. If loud exhaust is too much, but the 200hp is hit, atleast you cansay you hit it and pulled it back to make the car bit more liveable.
Hitting that number might seem silly but it would make me happy
I think your header runner diameter may be the limiting factor in your system. Not sure if you mentioned your current runner diameter but I believe using a 1.75 inch runner should solve your issues and allow you to rev further and produce more peak power
My current runner diameter is 45mm or 1.772in which is very close to Mirls Atlantic header that made 280hp
It’s also comparable to Mirls header as they are both 4-2-1
my fully toda built (toda itbs, high comp, cams, e85) f20c s2000 with a 60mm exhaust made 240whp on the dyno.
That’s a great example, thanks mate
For shits and giggles I'd keep the current header, do an expansion chamber from header up to 3" run 3" pipe for 3/4 of the system and then start stepping down diameter at 1st muffler to smaller diameter again at 2nd muffler or a hot dog and smaller tip. At least with a 86 you got length in the system to play with.
HK$ used to do this with larger diameter at headers stepping back down to smaller diameter. Hot exhaust gasses need the diameter to escape, but as the gasses cool through the system the diameter can be brought back down. Benefit of that is not having a loud obnoxious wet fart sounding exhaust that still flows. We all know what happens when you go the opposite with a smaller to larger system, insert milo tin fart can here... 🤣
I make my own exhausts, so that keeps costs down to just buying the materials to experiment with. That's if you're into that sort of thing, I enjoy "bending air" for the sake of experimentation and learning. Not everything has to be as everyone else does.
In other words, no I cannot give you a definite comment on what might work.. 😋
I might have to learn how to weld soon and experiment with exhaust variations
It’s actually difficult to see in the photos but my toda headers have a bottle neck after the final collector. I imagine they did that for a reason and I did recently watch a video of a guy who made his exhaust sound like an f1 by stepping down the primaries.
So many possibilities
Is a 60mm exhaust going to give you power? Most probably... Is it going to get you to 200hp? I'm almost sure it won't.
So the real trick is if those up to 5-...10?hp (account other variables, especially if you're making some changes to the injectors, etc) are worth 1500 AUD.
I've always used a 60mm catback, except when for a very reasonable 150 USD I tried the stock AE86 exhaust for being low key back when I had the mild-tuned 16v.
With my current mid-built blacktop I've had two different 60mm catbacks: an HKS HiPower and a Brave exhaust. Max difference they had was a 1.5hp difference on the dyno (if at all), tested back to back. I kept the HKS for a cleaner sound.
A custom exhaust is never going to be as well developed and "sound engineered" as an off-the-shelf part. The Brave, as much as it looked like a 60mm version of the Fujitsubo (I always really liked the finish and "OEM look" and always had one on my sights but the 50mm kept me away), sounded raspier. This also comes down to the materials used, and even though the HKS is mild steel, it had the best hp and nicer sounding (IMO) note.
For contrast, the titanium Tomei ones sound rough as hell, and I'm not particularly impressed with their performance on either design (they provide a comparison vs a literally very rusted Toyota stock exhaust). But the weight advantage is substantial. It's just not a streetable setup I'd ever consider, and probably neither for a track-only, as I'm not convinced on the power gains.
You could also consider a middle of the road which might be ideal for you. There's also a 60mm HKS "Sport" which literally only changes the back section from the HiPower with a more "OEM look" silencer. I think this could be a real option if the price in AUS is right. Regardless, I'm pretty sure you'll be able to find either the Sport or HiPower for closer to half the price of the TECARTS one.
Speaking of TECARTS, I've always been intrigued with their HP ratings. It seems to me they're estimated crank numbers, as they claimed high numbers when they raced in the N2 AE86 series in Japan, but I never saw their cars with higher top speeds or any particular straight line advantage.
Also, their claimed 217PS build for Tsuchiya's car vs TRD's Sakurai "stock but blueprinted" 20v which was rated about 170-180hp had, even with the advancement of the newer tire compounds from the Yokohama A048 to whichever new-then Hankook "S-tire" had when they lapped at Tsukuba... a single tenth of a second faster a decade later. Somehow I'm at best dubious with their claims.
If you want to discuss this further or have my take on my own dyno experience on exhausts and 86s, hit me up on Instagram with the same username. Great content, dude. Cheers!✌
Hey mate I was building my 7age at the same time as your videos of your build were put up with the same goal of 200hp. Will it make it who knows should go very close gets tuned in 2 weeks. Very similar build to yours, unsure of what cams your running. Im running same headers but my exhaust is 2.5" titanium over diff, 3" over diff would be incredibly hard.
@@1jzs144 that sounds very interesting I have so many questions
Is your exhaust custom?
Where are you from?
What kind of car?
@@NEVER-LIFT yeah custom mate, brisbane, ae86 notchback
@@1jzs144 cool if you have Insta send me a DM @199niko199
Hey brother. When I talked to MRP about making 200whp on a 7A he made it clear that BT throttles won't cut it. I can't confirm or deny if it's true because I haven't decided to go for 200whp due to class restrictions but I would put on those TRD throttles 100%
Very interesting, hopefully with a little time someone will be able to confirm what Barry told you. If so I think the TRD throttles would be the answer
Can't say exactly when 45mm blacktops will become a restriction. with 2mm oversized 47mm plates, they will do 150kw no problem. confirmed by switching to 52mm throttles and it made the same power. a 40mm runner in front of the throttles will limit power into the 130-140kw range. so you can start to see how a silvertop 43mm throttle would be a no go and 45mm blacktop getting borderline heading towards 150kw. taking into account the throttle plate
Too small for sure!!!
63mm piping have a muffler made. It's not difficult, what is the diameter of the collector.
The collector tapers down so I’m not sure, I’d have to measure it
Hey mate, whats the best contact for Matt?
Email but he is a very busy man so good luck
@@NEVER-LIFT😅
3" pipe is ridiculous on a wee 4cyl. Thats mild V8 size.
Why dont you go back to the dyno, unbolt the exhaust at thw back of the extractor and see what it makes with all restriction removed.
It kinda seems like you are guessing as to what the restriction is? Is the engine worn out? Maybe thats why its puking with blowby?
Id hire the dyno out for a day and test test test. You can weld some barbs to the exhaust and do a dyno run with a boost gauge connected at various points and see exactly how much restriction it has.
I wish I took the time to unbolt the exhaust when we tuned it the first time
If I did there would be much less guessing now
Hopefully I’ll get it all sorted soon, thanks for the advice
10mm is a massive increase in flow
Exactly, hopefully it’s enough
Thats what she said
Fujitsubu FTW!
201 HP 😉
Proper
Got a set of 1000cc Bosch Injectors you can have for free that came off my 16valve small port.
1000cc! Not sure I have a use for them
You might be better off selling them for some extra pocket money
Thanks anyway
If you go too big on the exhaust you lose torque from reduced scavenging effects
So what do you suggest I do?
A New Zealand trip would be awesome!
I might come home with a kp61😂
Chasing NA power is just time and money at the end of the day, I imagine I’m probably gonna develop a long lasting relationship with my local dyno owner
Do it!! If you make it to Wellington hit me up so you can come check out my slow going 7agte ke30 build 😉 thanks for the videos brother. Your content has got me back into my car after years of it sitting in the garage
@@7agte.ke30 That's awesome, get it running bro
200馬力 の走りみたいです
150KW/201HP is a hard nut to crack, my 5AGZ SC is kind of a disappointment but I never really finished it or tuned it. I don't have much first hand knowledge but Garage 4AG (ruclips.net/video/99JlMhbA-vc/видео.html) has done a ton of Dyno testing
Garage 4ag is a great resource, he’s the reason I’m even considering going 3 inch
@davegt27 what didn't you like about the gz?
@@Garage_Dori I love the fact that I did it (great fun) but if I had not gotten all the parts cheap I would not recommend it. I also had a 88 CRX D16 race car and it would run circles around my GZE (so to speak)
4ages are cool but realistically just go 2ZZ.
【1台5役】 テックアート 最新の デモカー試乗 究極のメーター &最新 7A-Gエンジン で ドリキン ご機嫌♪ ~ 土屋圭市 AE86熱世界 連載第12回~【新作】 7AG 220HP ruclips.net/video/tK2EwQ6AtVQ/видео.html
Thank you
20hp gain for an all motor application s a lot @nyal1988, you should try using a Short pipe for a dyno run , then you will figure out if that's where your restriction is at. I have a stock 4age20v bt with bolt ons stock ecu and SAFC for fueling, and its making 160hp at the wheel with a 2.25 exhaust, in other words not all the builds are the same, you have to try a few things to know which one your engine likes..
100% Ive seen people spend crazy time and money on NA tuning just to gain 5hp
I’m just banking on the fact that we haven’t yet seen what my 7a is capable of.
It could end up being a very long road to 200hp