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PSSSST-Are These Heads Any Good? TFS 225 VS LS3!
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- Опубликовано: 7 авг 2024
- FACTORY LS3 vs TFS 225 GEN X CATH HEADS! WHAT WORKS BEST ON A 6.0L? Having already compared the 706 to the 799 heads on a 5.3L and 6.0L, then the 799 vs LS3 heads, it was time to compare the factory, rec-port LS3 heads to a set of TFS 225 heads. Since the rec-port LS3 heads were more powerful than any of the factory cathedral-port heads, how would they compare to a set of after market heads? We compared them to TFS 225 heads with two different intakes.
So now we obviously need to see a Trickflow Cathedral vs Trickflow Rec port shoot out (Fast manifold on both).
This is awesome! Now you’ve gotta port the REC port heads haha
I would really like to see a good cnc ls3 vs the as cast 220 and the 225 just because of price on all three being in the same ball park.
@@Hatcher426 me too
Dont forget a better camshaft for the rect heads
Richard - Great test - the engine I tested for Car Craft was very similar as an LQ4 6.0L using the same TFS 225 heads and FAST intake but I chose the slightly shorter Comp 227 @ 0.050 cam and generated 557HP at 6,600 and 501 lb-ft of torque at 5,400 rpm - very similar rpm peaks just down on horsepower because of the shorter cam. So that bigger cam is worth roughly 20 hp at the top. As usual, you do a great job of offering test dyno test information. This is going to be worth even more now with Discsovery Channel killing 19 of their titles! You will become the source for dyno testing!
thnx El Jeffe,I merely walk in the shadow. we will have to see how things shake out with the mags-our world is always changing. 2020 will be interesting.
@@richardholdener1727 As it turns out, 2020 was EXTREMELY interesting.
Did u only change springs when using these heads what lifters and pushrod and style rocker arms did u use ?
Those are rwhp numbers?
Great episode great channel
Hey Richard. I noticed the studio content in your videos only have audio on one channel. Love your YT and Instagram posts!
lot of those earlier vids were done with mono lav mics and receivers-upgraded to stereo when I use the SLR
Great job love your videos
For the love of god, fix the uneven volume. If i crank the volume to hear what you say i'm about to pop an eardrum when the engine sound is suddenly cut in.
will do
@@richardholdener1727 Thanks! Love the content. Keep em coming.
But thats the thrill of youtube 😂 makes u jump in your pants lol but i do agree sometimes its hard to hear u lol acoustics are a bitch lol
@@richardholdener1727 hey rich I have a stock bottom 5.3 with stage 2 btr cam ls7 lifters and trays with 799heads btr valve springs trying to find a good set of heads to throw on it to wake the hose power up a little more any suggestions
The next test should be 706's on the 6.0, stock... then port them. Then put them against the trick flows... That seems to be the path most of us take. I notice some people mildly port them and some people really hog them out... So maybe two stages of port work. Is it worth the port work or would it be better to just save your money and buy a set of trick flows?? Some people grind out the part of the bowl that makes it a vortec and i wonder if that hurts or helps. Chevy did really well on design but i wonder if people are disrupting flow with the big port job.
Think you can do a test between these and the Texas Speed PRC heads?
Does that mean always a cathedral heads +fastlsxr102 intake will show more gains than a rec heads +an intake or is there some exeptions I am asking because I will be building a budget 408 twin turbo setup I want to make around 1100-1200hp and I have seen similar setups runing stock heads +arp bolts so I am a little bit confused
Richard, thanks for doing this test, it's very interesting! It's the any chance you could do this with Trickflow rec port heads and a rec port FAST? That would be really interesting to see
I dont have the tfs 255 heads right now unfortunately
I would like to see that test as well. However, the LS3 intake will be fine to use.
How good would those 225 heads do compared to some prc ls6 799 heads?
I have a LQ4 but dont know what heads to run! Im going to twin turbo it. Definitely going aftermarket head though. Torn between those Trickflow 225 Cathedral Port or PRC 823s. What is best for boost?
I have those Trickflow 225's on a 427 with an F1a Procharger. Had them on an LS2 prior.
nice combo
Hey Richard. I have a ls2 stock shortblock with 821 ls3 gmpp cnc heads with a similar cam and hi ram. I believe the gmpp ls3 flow 355ish at 600 lift. Good to see what idea the power level is at the flywheel. Love my setup. Boost is my next add on to it!!!!
boost helps everything
The Trick Flow and Fast setup is awesome but the heads and rockers that have to be used is about $3200. The intake is $1000 "Injectors and rails NOT included"
So it would take around $5000 to make as much power as a stock 5.3 or 6.0 with a $400 nitrous kit. I'm not a genius but I'll take the cheaper route
Thank you for all the data and videos Richard, I was pleased to see you start posting them to your channel. One small Gripe I have with this test and others like it... We know the ls3 intake is good and not far behind the fast, but when doing a rec vs cath test Why not use a fast 102 combo on both just to eliminate that variable?
Thnx Ill keep that in mind
I wanna say hotrod or someone tested them side by side and gains were negligible. but big improvement when the ls3 manifold was ported vs the fast
rebel4life383 that was me Testing all the ls3 intakes
What about comparing trickflow rec heads and trickflow cathedral heads?
Was that with the new or old dorman LS2 intake? The old one is supposed to be fairly poor.
I have a nice set of prc cathedral heads that flow 322cfm at .700 lift and at .950 flows 330. Find out soon once they get put on my 408ls
Richard , Im really curious . I have a Gen1 sbc 383 all forged scat wiseco crank rods pistons running a coli over plug ls1 ecm and injectors and hp tunners . Dart aluminum pro 1 heads comp cam single plane efi intake that runs a 4150 throttle body w/ a bw s488 t6 96mm turbine. Do you think I would make much more power switching to true lsx architecture like the 6l ish gen4 engine?
Awesome video. Can you do a video on what all the stock head do for compression ratio. Don’t for get the most common 862s lol
862 is the same as 706
Awesome test! What would this comparison look like on a 6.2? Same difference in power, or would the spread increase? Thanks Richard!
SIMILAR
Cleetus has been running cathedral port heads forever even on his latest 2000+ hp ls427.
Are these the as cast tf225s or the competition ported version?
And for anyone that will argue that the rec heads need a bigger cubic inches, I did the exact same comparison on a 416 motor where I compared a GM LS3 CNC'ed rec heads vs. TSP 237 cath heads with FAST intake, and the HP jumped from 468 to 490 right away!
?hp Wheel
@@johndelta00 yep, at the rear wheels.
Don't really know what these TFS heads cost complete with valves and springs but back in 2008 l got a set of rectangular port or CNC ported LS3 heads with stock valves and upgraded springs to match the split lift and duration camshaft being used from Scoggin Dickey parts center for 1200 dollars to replace the cathedral port heads on a LS2 crate engine l ordered with a GM carbureted single plane intake manifold that makes 540 horsepower at the crank the engine pulls very very strong from 3000rpm to 7200rpm it's still in the car going on 12 years and runs as good or better than when put in it has a holley hp 850cfm carburetor and 1 7/8 longtube headers it revs up so fast in 1st and 2nd gear when the throttle is floored you'd better be on the shifter or your bouncing it off the rev limiter set at 7200rpm horsepower and torque seem to carry very well even above 6500rpm without any falloff or tapering or struggling like every old style smallblock l had that horsepower and torque dropped off sharply like a boat anchor off the side of a boat after 6000rpm even with a solid cam with 248 duration
One thing I would say is that the LS3 heads are quite easy to port and get more CFM. The lower power across the rpm range suggests inefficient flow for runner volume. You can smooth the rough sand cast finish, smooth the flow path around the stud and spring perch, teardrop the valve guide boss and blend the seats. I wonder if you would need a turbo at that point to really take advantage of the flow potential.
The results would be the same it you added the same boost to both
@@richardholdener1727 I meant if the 823 was ported to improve the flow path. How do ported 823s compare to ported cathedrals?
Id still just use the LS3 heads and intake in stock form with some springs and boost it. The hp per dollar isnt worth buying those heads/intake. The only reason id switch to aftermarket heads is if I were wanting a thicker deck to hold in more boost. I guess if you're NA you don't have a choice and need to spend on those items.
that's why I test-so everyone can choose their own path!
@@richardholdener1727 so why didn't you test a set of cnc ported LS3 heads?
Which is better in a quarter mile na stock engine 6.0 taking into consideration the cam and intake manifold
Ls3 cnc ported heads with whatever best cam,intake manifold for this setup vs tfs heads with whatever best cam +fast intake manifold .
Any experts here?
@@hassanabas1549 put some 706 heads on it with tbss intake 👍🏼
Richard great stuff how about a holley high ram on both the heads? ive seen the stock ls3 heads take good advantage of it. But what about the aftermarket catherdral ports? Will it make more power than the stock ls3 heads on a high ram?
yes they will with any intake
So I want to build a 5.3 turbo motor at 25 30lbs maybe I have 706 should I port match them or buy new 205 trick flow I'm a 15 yo mechanic so what do you all think let me know
Was this a stock ly6 with just cam and heads and spring upgrade
Thank you.
Richard, have you considered contacting Ed Curtis to test a couple of his cam grinds? He seems to have cams in some of the fastest rectangle port stuff and I'm curious what the gains would be from the Comp cam in this test to one of his grinds. Keep up the great work!
thnx for the recomendation
Great idea.
Ed Curtis is one of the best.
He specified me a camshaft once and it was a little ripper.
john rodabaugh you might want to check out the rec vs cath cam tests
@@richardholdener1727 I've seen them. No difference really on the rectangle port and cathedral port profiles between the 2 different heads. Just be interesting to see how his profiles work on a back to back test on either style head.
Okay but what if you add boost?
Whats the compression ratio with the ls3 heads?
Hey Richard. I've seen a test ( think its Weinhart ) where they filled the floor of the LS3 head by approximately 20% and only lost 10cfm. They have another test of raising the roof and leaving the floor alone and the port goes to 396 cfm. Maybe there's something to it, filling the floor and raising the roof and still yielding smaller cross section but more flow.
396 cfm?
@@richardholdener1727 typo. 386cfm. Here is the discussion: ruclips.net/video/uHneE2Uh610/видео.html
Got a question
Looking for the best heads for l83
5.3 with btr stage 2 cam
stock or ported stock
I would love to buy that 6.0 from you Richard
TFS Cathedral 225's are winners on 5.7, 6.0.. I did get notes from the TFS 255 LS3 comparison and AFR 260.
TFS 255LS3 579HP and 529ft-lb
AFR 260 591HP 433 ft-lb
The AFR's start winning after 5200 rpm over the TFS My thought is the TFS didn't need as much exhaust bias as the AFR and this brought the power number down, but who knows? Either way all are bad ass heads.
Or the tfs 255 vs cncd ls3 heads
How would you think an ls3 cam would work with the 225 heads and fast intake
look at the 6.0L cam video to find out
How about ported LS3 heads or aftermarket LS3 heads against those TFS heads? The TFS heads are great heads but don't they cost more than the LS3s, even with the LS3 being ported? Do you that dyno video?
I did not try ported LS3 heads on this motor
Thank Richard your doing gods work! Lol
Would this work with 2005 LQ9 ENGINE? would you recommend this setup for that ENGINE? What size cam and where can i find it
YES
My 302 5.0 push rod foxbody mustang are the gt40 heads a real limited factor should I go to a trick flow head Aluminum
that depends on cam and intake but TFS heads are better than GT-40-I tested ALL of the 5.0L heads in the Ultimate head shoot out for MM&FF back in the day
Something not mentioned here, which is discussed in some of the great articles Richard has written over the years for Hot Rod (big RH fan here!) 🙌❤️
A lot of the success on an LS3 rectangle port head will come from the size of your bore that you’re working with.
Those of us using roughly a 4.00” bore and smaller, the cathedral heads are beautifully optimized for the set up. Cam it for your goals, stick a Fast on there and go party.
The valves are small and efficient, and do not experience the shrouding that occurs when we shove a massive 2.165” intake valve (on the rectangle port LS3 head) into a small 4.00” compartment.
The takeaway from this is: one head is not assuredly better than the other: which head is better for YOUR combination? That’s the joy of research. 😊
Naturally aspirated 408ci and smaller LS motors Absolutely adore a quality cathedral head, the above explanation covering part of the reasons.
Short Case study:
I made 505whp/490wtq SAE with a small cam, PRC 243s and a lightly ported Fast 92 on a 402ci LS2 back in 2010-2011. 12:1 SCR on 93-octane and 23* timing. Drove like stock with just 17* of cam overlap.
Switched to TFS 235s, medium cam, and an untouched Fast 102 in 2013:
Made 548whp 505wtq SAE.
Same car, same dyno, same tuner. 😎 Went 10.90s at 128 at a 3600lb race weight. Fat car with a fat driver.
It’s all about having a well sorted combo for the car and displacement you’re working with.
Those of you with LS3 376s, 416s and 427s? Sky is the limit for you with a quality rectangle port.
Hope this helps! Too many folks forget the basics of bore and how it limits or uncorks the potential of the lungs feeding it.
Edit: boosting is a whole other discussion! 💪😉
I'm thinking about using cathedral on my ls3 camaro
Little late to this game here, any chance what might be seen with a slightly bigger cam? I ask because I have a BTR stage 3 cam in my garage and nothing to put it in...this might be it
that cam works well on a 6.0l-just trades a little down low
@@richardholdener1727 sounds good to me. I greatly appreciate it
pssst summit owns trick flow. In my experience, good quality stuff.
yep-those 225 heads work well
Is this specific set up on the 6.0 good for low boost pushing around 8 psi
yes
Where these out of the box TFS heads or sent out for porting?
out of the box
When did you start doing chevy's? I remember you doing the silver state classic in a 5.0 mustang when you were still going to cal state Fullerton.
John choy I test everything and I still have that mustang
Cool. I'm still a fox fan. I have a 88 coupe that unfortunately I probably have to sell. Ben Alameda did the porting on first gen twist wedge heads and his smog supercharger cam on a stockblock, s trim with a CHP 347 stroker kit with turned down Cleveland crank and 5.4 eagle rods. Would like to redue shortblock w/Dart but hard times. Good luck on your current endeavors.
John choy thnx-mines an 88 too
Now do ls3 cncd heads vs tfs 225 heads
Hi mate, which rockers did you have on the 225 heads?. Trickflow say you must use roller rockers & to use Harland sharp one's. Is this correct.
Thanks.
Jason.
stock rockers on these heads
@@richardholdener1727 one more question for ya, how much can I shave off the heads before I have PVC issues using that cam
Thanks,
Jason Nash
That’s a big compression difference. I bet if the ls3 chambers were 65cc like the trick flows it would have been very close. 71cc vs 65cc is a big difference.
stock vs stock
Would like to see the GMPP CNC LS3 heads tested vs these two.
Used a set of scoggin dickey cnc ported heads on an L76 with a Herbert cam, lsxr manifold made 610hp so would like to see you do a cathedral head comparison to match that
@@Hitman-ds1ei exactly! Compare factory to factory, then aftermarket to aftermarket, rec port will always come out on top!
@@Hitman-ds1ei may i ask which herbert cam you used? Im building a forged 370 w/prc cnc ported ls3 heads and my goal is 600 hp crank or as close to it as possible. Bet that setup ran great. Also was it an auto ,if so what size stall
@@ls87gbody i will look it up for you, but is in a manual car, lenco,
@@ls87gbody 190866-13 and ran their short stroke litters which need the valve spring pressure they say, as tried less but saw valve float early, then ran it as solid with zero lash cold was worth bit more again, ran with lsx-r manifold on all runner lengths and found made peak HP past 7200 with shortest runners of 647hp, 2" primary ceramic headers peak torque 5651rpm, hope that helps
One day I'm at junkyard looking spark plug wires. I see this car got Bosch 4 prongs spark plugs. Horse power gain was great but my gas mileage sucked. 91 Buick LeSabre 3.8.
Great video this is exactly what I thought the results would be. LS3 heads are great but you don't need them to make huge power. So does this mean the volumetric efficiency of the cathedral Port head may be better than a rectangular Port head?
Can you use a fast intake on a cathedral style head
they make FAST intakes for cath heads (they made those first)
How do the 862 heads do? Have you tested these somewhere
yes-same as 706
Brother you just opened a hole new can of worms. Lol. Now what about the factory cnc ported rectangular port heads from GM Performance? 🤷🏼♂️
Bad Luck Garage do a search for ultimate LS Head Test Hot Rod -I tested every cath and rec port LS heads
do a Apache Hemi head conversion on the old 5.7 Hemi.
What size injectors do you have in that? Have to be 42 or more at 60psi
80
Where are you located? I have a twin turbo LS3 6.9ltr I'd like to get some dyno tuning on.
WESTECH IS IN MIRA LOMA,CA
Thanks I'm gonna give them a call and get scheduled. It's gonna be something they will probably want to video for some content
Do a test to see how much ported heads pick up with boost please!
I already a test on the installation of TFS205 heads on a turbo 5.3L
@@richardholdener1727 thank you for replying I recently subscribed to motor trend on demand cause I love the numbers and tech specs of engine masters and all the other video content nice to see someone who is putting out educational content on making power with different combos keep up the awesome work I'm subscribing to your channel now
I just build a 6.0 with rect port Ls3 heads , Ls3 intake, btr stage 3 cam , 4L80 transmission. How much power you think I’ll be at?
depends on which stage 3 cam (truck, na, turbo, stroker, nitrous)-but over 500 flywheel
@@richardholdener1727 truck cam
@@richardholdener1727 218/224 .553/.553 110+0
Ls3 intake with what size fuel injected?
SIZED FOR THE POWER LEVEL
Not fair Richard! Dorman ls2 manifold, had a 92mm throttle body. F.A.S.T was a 102mm throttle body. A lot of the 15 hp came from the larger throttle body!Comparing apple to oranges.
Thnx for the insight-I do love apples and oranges! I think you mean its not fair thatt he Dorman had a 92-mm opening in the manifold and not a 102-the bigger throttle body on the Dorman doesn't help!
@@richardholdener1727 I really love your videos and enthusiasm. Just trying to keep comparison as fair and accurate as possible.
Trick Flow "cathedral port" 225 heads are no slouch with excellent low lift flow:
Lift Value Intake Flow CFM Exhaust Flow CFM
.100" 68 55
.200" 142 120
.300" 220 178
.400" 279 223
.500" 316 239
.600" 338 245
Would have like to know the flow numbers.
315-318 for the LS3 and 335 for the tfs
Thanks, sure didn't realize it would make that much difference in power.
It seems to me that the 6.0 works well with the smaller ports than larger ports. I do not think that the 6.2 would like smaller ports from the ls2.
Honestly, I tend to wonder how much of an effect valve shrouding is having on the 6.0 with the huge valves that the ls3 heads have. Yes, those heads fit on a 4" or larger bore, but that doesnt mean they are ideal in such use. I have had an l92 6.2, and an l76 6.0. Same engine basically, with a bore size difference. My l92 felt much better at lower rpm vs the l76. The only way I really see that bore change making as large of a difference as it makes, is that the compression ratio is up on the 6.2, and the very large valves are allowed to do their thing with the larger bore giving them more room to breathe.
Are 821 ls3 heads also?
Yes. The LS3 never actually had 823 heads, it's just that they are the exact same casting aside from valves as the 821. The 823's are what come on the automatic Camaro SS L99 (and some 6.2 Gen IV trucks), which is the VVT/AFM version of the LS3. The only difference between the 821 and 823 heads is that the 821s have a lighter hollow intake valve compared to the solid valves the 823s use. 823s are fantastic heads. I have had both and am currently running the 821s on my LS3.
While I'm not arguing that the TFS didn't make more power than the rectangular port LS3 heads but with the cost of the TFS heads they are not cheap they are expensive bet if the rectangular port heads were CNC ported it would pickup 10 - 20 more horsepower and be more cost effective than buying a expensive new set of heads and the reason the TFS head made more power is because the exhaust side flows better than the rectangular port heads the rectangular ports still out flow the TFS heads on the intake side which is why on the rectangular port heads you need a split lift and duration cam with more lift and duration on the exhaust side to really get the most out of them
take a look at the rec port vs cath port video and you'll see that both heads respond the same to the cam changes
If you have any engine size smaller than a 416 use cathedrals. They perform a lot better with crazy power under the curve and actually accelerate the car quicker.
That big intake valve of the ls3 head shrouds the 4 inch bore and not only do you make less power, the engine doesn't perform as well either as the head is too big for that bore and cubes.
People need to realise the ls3 head was made for 427+ engines with a minimum bore size of 4.125.
This is where it works more optimally.
Also the LS3 head was originally meant to have gone on the ls7 but GM could not meet their goals with it so they scrapped it and recycled it years later.
The LS7 is the finished product and it is clearly a superior head.
Mr Mysterious by ls3 you mean 823?
@@duramax78 It is the same head.
There is an 821 and 823 version
823's for sale!
How MUCH?
I had my stereo up on my truck on the way to work and my ears are bleeding. The sound is a little off lol
Can you use ls3 heads on a 5.3?
No because of the larger intake valve won't clear the smaller borer.
Nice, but why was this coolant tube glowing red hot??? ;)
Coolant tube glowing red hot?
@@richardholdener1727 That red silicon hose ;)
@@andriosz got ya-its a hot little motor
Now add Chevrolet performance CNC heads and make it a 3 way test.
2 guys who disliked this video are probably just a Coyote owners 😂🤦🏻♂️
I've done lots of Coyote testing too, we can all get along-the only complaint I've read is audio! I need a good IT guy!
@@richardholdener1727 You could try to normalize the audio channel. That will drop the ultra loud spots and crank up the quieter areas.
@@richardholdener1727 I know this is months later and you seem to have fixed it, but I wanted to tell you that this video was also heavily favoring the left side audio channel. Great video.
It's all about the velocity through the head...
Hey well which heads are better for boost ?>>>
both r good
Richard Holdener thanks a lot ! Love your vids, we’re about to build an ly6 ourselves, looking to pro charge it...but wasn’t sure if those heads will be good for that, just gotta figure out a camshaft.
Did you eliminate the VVT?
NO VVT
@@richardholdener1727 Thank you so much. I'm doing this at home all on my own with basic mechanic knowledge and your videos are really helping me out.
Here’s the video I uploaded yesterday about home porting the 823. ruclips.net/video/50nPwstQQII/видео.html
Not a fair comparison, Richard. The LS3 heads breathed thrugh a 92mm TB, and on the final pull with the FAST intake, the cathedral heads breathed through a 102mm TB.
adding a 102 tb to a 92mm throttle opening on the ls3 intake does nothing. adding a fast 102 ls3 intake adds nothing
Im watching this like if i had the money to afford TFS heads and a Fast 102 Intake
Hey, Rich do you think you could do a video on LS trunions? Is it needed and when. I have the Comp 617-624 231-239 113 I was told over 600 lift you need a trunion or I’ll screw everything up. True? It’s a street car 62 Chevy ll lm7 junkyard motor. Thank you.
Awsum
Just wondering how much more power would the difference be for those heads on a 5.3 stroked to a 383 ?
I’m all about the 500 ft lbs of torque at 5200, super fun on the street. 👍🏻
Got that on 383 I just did
Hereinmissoula, What’s it going in?
The Comparison you need to do is: HAVE PRC DO A 2.02 VALVE AND Cnc PORT ON THE 243's Than run this same test PLEASE. 243's CnCed flow around 315cfm That is the ONLY GOOD TEST !!!
I missed an opportunity to run the ONLY GOOD TEST-ALL CAPS! Dang! Seriously though, If you want to see how ported 243 heads do-do a search on line for ultimate LS cylinder head test Hot Rod-I ran every LS head in that series-cath, rec then LS7-you will enjoy the data and I might put it together as a vid later.
you need an audio mic, Rich!
Adolfo Sandoval I have one for my slr and for the iPhone -just need and extension for the iPhone
@@richardholdener1727 other than that, keep up the awesome work!
Porting the 823s with the factory ls3 intake would save you a ton of money and outperform the cathedrals
But necessarily. Those ported 823's (LS3 heads) would probably make the slower port intake velocity of the rectangulars even more worse than they are when compared to the cathedrals. You would lose area under the curve esp. in the low RPM range. This test confirmed for me of what Iheard about how some big name engine builders prefer to use CNC ported aftermarket cathedral heads on their big inch (400 to 454 ci) LSx builds than rec ports heads.
please record in stereo
all the new vids are-check out the latest on the compound and let me know if its better
you NEED to work on your audio
just balancing levels and using a good mic will make a world of difference
listen to the new videos and see if there is a difference
@@richardholdener1727 keep it up :)
there is only one way to get better at anything in life
i watch your vids to help me get better as well
Yes the TFS produced better power but you have to ask yourself is the HP per dollar worth it? You gained 20HP for a $1200 head upgrade and 15HP for another $800'ish intake! You just paid $57 per HP!
Only you can decide if the extra power is worth the money
@@richardholdener1727 Yep totally agree. Sorry if it felt I was trying to poo poo what you're doing. In fact I very much appreciate the time and effort you put in here and with Engine Masters. I have a friend who's stuck in this mentality you need expensive parts to make power - so my comment was geared towards those folks. Thanks Rich look forward to your future content!
aXBlackDeathXa no worries -I only provide the data-ultimately you guys decide what to do-I don’t care which direction people go-I have no vested interest
You guys don't take into account that the much smaller head is way more efficient and yet it produces more power and torque everywhere.
This will translate into far better driveability, with part throttle response being vastly superior as well as the more efficient head accelerating the vehicle faster.
Not to mention it will also be better on fuel too especially on the highway.
So many people overlook these important variables and focus on a peak power number only.
@@mrmysterious6006 what would you suggest for a cammed ls3 motor?
If it’s sponsored by summit, do you really think the stock heads are going to win? Let me predict. No.
STOCK LS3 VS TFS 225 CNC, AND YOU THINK ITS CUZ THE VIDEO WAS ORIGINALLY FOR SUMMIT?
Richard Holdener I finally got to finish watching. I was right. The trick flow heads won. Not saying I didn’t like the test. It’s good news for me. I have a cathedral head motor. With a ported dorman ls2 intake. But really, I didn’t expect the trick flow heads to lose.
I will take a set of air flow research heads any time over the trick flows
The AFR heads work well-I used them on a number of builds including the LS intake test where I compared 20 different cath intakes
I feel the same.
There is something about the AFR that gives me the impression of superior quality.
It's also been shown that the AFR castings keep more energy in the combustion chamber compared to the trickflows.
How can tell when you've got a poorly optimized cam you ask? Whem your 823 heads (that are already too big) make more power than your 243's. 823s suck.
No send them to me for proper disposal
The audio is off. Almost sharted my pants when the dyno came on. Knock it off
just adjusted the latest one-let me know if it is better-thnx for the reminder