TRICKFLOWS or AFR
TECH Senior Member
iTrader: (10)
Joined: May 2005
Posts: 5,353
Likes: 2
From: Bossier city,LA barksdale AFB
https://ls1tech.com/forums/multimedi...ile-video.html
https://ls1tech.com/forums/drag-raci...s-glide-2.html
TECH Regular
Joined: May 2008
Posts: 460
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From: St.Louis Missouri
Tektrans has got the nuts man! The L92/LS3 heads are the way to go, hollow stem valves, milled to 68cc, yella terra 1.8 rockers, and a texas giant cam from texas speed slighty modified with a few added numbers with a 114LSA then spray the **** out of it. Your for sure gonna make nothing less than 540/520 through an auto no doubt and have decent manners on a street with about a 3800 converter. Check out texas speed first they know their **** when it comes to cylinder heads i don't give a **** what anybody says! I know some badass cars in stl uncluding mine 408+ set-up's making some nasty ******* numbers before the nitrous, turbo, and supercharger.... Any factory casting head that can flow 340+cfm out of the box with some porting and a mild 624'lift cam with a stock intake making 550 to wheels has my vote any day of the week. Do you homework and quit looking at the big names that people encourage you to buy! honeslty why do that when you could spend $1500 on L92/Ls3 heads fully assembled and do the same damage. Trust me i say it's the better bang for the buck! If you think Trickflow/ AFR are the nuts when it comes to cylinder heads by all means git're done.
TECH Regular
Joined: May 2008
Posts: 460
Likes: 0
From: St.Louis Missouri
It's like ******* honda and mustang owners you try over & over to convince then that they are **** slow, but they swear up an down you are retarded! lol goodluck with the choice either way you can't go wrong because a bowtie's hanging off the front of it!
Picking a cylinder head based only on flow numbers is like getting a mail order bride based only on her hat size.
You can't compare an L92 head with a 260cc intake port volume and a 2.16" valve to a TFS 235 head with 231cc intake port volume and a 2.08" valve, it's like comparing apples to oranges.
The key is the total combination, one of our customers holds the C6 LS3 head/cam record, but those heads are still over $2000 if you need to buy castings.
It's very hard to beat the TFS cathedral port heads combined with a Fast intake, if you look at the results you will find out. The all time fastest N/A list, the fastest hyd roller cammed cars still running a Fast (not carb, solid roller) are with TFS heads. Coleman Roddy has run 9.241 @ 146.29 with TFS 245's and James (TXCAMSS) as run 9.39 @ 141 with TFS 235's.
https://ls1tech.com/forums/drag-raci...s-any-c-i.html
Also look at the dyno section and read through the results. https://ls1tech.com/forums/dynamomet...s-part-ii.html
I think the OP is headed in the right direction based on results.
You can't compare an L92 head with a 260cc intake port volume and a 2.16" valve to a TFS 235 head with 231cc intake port volume and a 2.08" valve, it's like comparing apples to oranges.
The key is the total combination, one of our customers holds the C6 LS3 head/cam record, but those heads are still over $2000 if you need to buy castings.
It's very hard to beat the TFS cathedral port heads combined with a Fast intake, if you look at the results you will find out. The all time fastest N/A list, the fastest hyd roller cammed cars still running a Fast (not carb, solid roller) are with TFS heads. Coleman Roddy has run 9.241 @ 146.29 with TFS 245's and James (TXCAMSS) as run 9.39 @ 141 with TFS 235's.
https://ls1tech.com/forums/drag-raci...s-any-c-i.html
Also look at the dyno section and read through the results. https://ls1tech.com/forums/dynamomet...s-part-ii.html
I think the OP is headed in the right direction based on results.
Last edited by Brian Tooley Racing; Jan 12, 2010 at 08:48 AM.
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When my car was NA with the 408, I ran consistant 10.30's at 130 MPH with 3800# race weight. I was running just under 12:1 compression, Crane 242/252 cam on a 114 and drove to and from the track every time. I was running the same AFR225's that I am running now and the car was geared and cammed for spray. I still run the stock rockers and LS7 lifters.
nick williams had tfs 235's on his 402 and i believe its one of the highest hp 402's there is. i think he hit 570rwhp with good tq. search under his name. one day i will have my f1a procharged l92 topped off with tfs 235's 
TECH Senior Member
iTrader: (10)
Joined: May 2005
Posts: 5,353
Likes: 2
From: Bossier city,LA barksdale AFB
friends TFS out of box record car David AKA stripes owner of G.C.R.
408ci 6.0 iron block, trick flow 245 cylinder heads, solid roller cam, and a super victor intake, through a rossler th400, 6200stall converter, ford 9" with 4.56 gears it made 652whp abd run 9.30's na
vid i took/made
changed the music from rock for once
http://www.youtube.com/watch?v=IqrCP0IVWHI
and 1/8 mile in car pass
http://www.youtube.com/watch?v=HxFkH1g3q7M
more info here
https://ls1tech.com/forums/dynamomet...ad-record.html
408ci 6.0 iron block, trick flow 245 cylinder heads, solid roller cam, and a super victor intake, through a rossler th400, 6200stall converter, ford 9" with 4.56 gears it made 652whp abd run 9.30's na
vid i took/made
changed the music from rock for once
http://www.youtube.com/watch?v=IqrCP0IVWHI
and 1/8 mile in car pass
http://www.youtube.com/watch?v=HxFkH1g3q7M
more info here
https://ls1tech.com/forums/dynamomet...ad-record.html
Last edited by SIC LSX; Jan 12, 2010 at 05:23 PM.
TECH Regular
Joined: May 2008
Posts: 460
Likes: 0
From: St.Louis Missouri
Yup i'm sure they made good power with those set-ups but you can spend less money on the factory casting head and make about the same power. I'd never buy a fast anything to bolt up to my car. Thats why i'm getting together all the parts together for a single plane set-up with a 4Brrl TB.
I would go with trick flow. I have a 11:5:1 LQ9 408 with 225cc trick flows, Fast 92mm. On the engine dyno I made 635hp and 577ftlbs. Almost done, so I don't know my rwhp or torque. Pricey, but well worth it.
I have l92 heads on a 402ci and got good results with the combo(i hope better with the ported intake and pat g cam going in). If I had to do it all over again,I would go trick flow 235 heads on a 402ci. They make the power and from what I hear drive great too. Now,I'm just waiting for trick flo or afr to make a after market ls3/l92 typ hear so I cam swap to something better. Good Luck with the build.
Heads I am really stuck between the AFR 215's and TFS 235's, I know they are really two different heads, but from what I'm gathering the TFS 235's supposedly won't sacrifice any low end torque... 
friends TFS out of box record car David AKA stripes owner of G.C.R.
408ci 6.0 iron block, trick flow 245 cylinder heads, solid roller cam, and a super victor intake, through a rossler th400, 6200stall converter, ford 9" with 4.56 gears it made 652whp abd run 9.30's na
more info here
https://ls1tech.com/forums/dynamomet...ad-record.html
408ci 6.0 iron block, trick flow 245 cylinder heads, solid roller cam, and a super victor intake, through a rossler th400, 6200stall converter, ford 9" with 4.56 gears it made 652whp abd run 9.30's na
more info here
https://ls1tech.com/forums/dynamomet...ad-record.html
I am doing a build with TFS225's on a 403 now, but I know I will be using a little gas down the road too. I had some TFS 215's but opted to step up. If I remember there are no differences between the 215 and 225 exhaust ports, only difference in flow is on the intake side and it is not huge.
L92's are great for the money, but IMO why stick a fair amount of money in castings that are one dimensional and limited in their uses. Head lift on these engines is an issue as we all know. What if you choose to go boosted or N20 down the road with your combination?
If I'm not mistaken nick williams vette with the tfs 235s was dyno'd on 98 octane I would like to see some 93 octane numbers he would most likely turn the timing down a bit for not running a higher octane to gain power from more timing....but I am looking at this https://ls1tech.com/forums/dynamomet...big-power.html since I already have afr 205s it will make a high velocity air speed motor for a very snappy throttle response for some fun on the street.
with the right stick in there it will still have great bottom end even with a 235 head. something in the low/ mid 24x i high 24x, low 25x e on say a 113 +3 will still give you a decent dcr and perform great. some people have had good luck with the l92/ls3 heads but there have been quite a few dissapointed also. go ahead and get the new 102 mm fast with a 100mm+ tb and be done.
just my $ .02
just my $ .02
Picking a cylinder head based only on flow numbers is like getting a mail order bride based only on her hat size.
You can't compare an L92 head with a 260cc intake port volume and a 2.16" valve to a TFS 235 head with 231cc intake port volume and a 2.08" valve, it's like comparing apples to oranges.
The key is the total combination, one of our customers holds the C6 LS3 head/cam record, but those heads are still over $2000 if you need to buy castings.
It's very hard to beat the TFS cathedral port heads combined with a Fast intake, if you look at the results you will find out. The all time fastest N/A list, the fastest hyd roller cammed cars still running a Fast (not carb, solid roller) are with TFS heads. Coleman Roddy has run 9.241 @ 146.29 with TFS 245's and James (TXCAMSS) as run 9.39 @ 141 with TFS 235's.
https://ls1tech.com/forums/drag-raci...s-any-c-i.html
Also look at the dyno section and read through the results. https://ls1tech.com/forums/dynamomet...s-part-ii.html
I think the OP is headed in the right direction based on results.
You can't compare an L92 head with a 260cc intake port volume and a 2.16" valve to a TFS 235 head with 231cc intake port volume and a 2.08" valve, it's like comparing apples to oranges.
The key is the total combination, one of our customers holds the C6 LS3 head/cam record, but those heads are still over $2000 if you need to buy castings.
It's very hard to beat the TFS cathedral port heads combined with a Fast intake, if you look at the results you will find out. The all time fastest N/A list, the fastest hyd roller cammed cars still running a Fast (not carb, solid roller) are with TFS heads. Coleman Roddy has run 9.241 @ 146.29 with TFS 245's and James (TXCAMSS) as run 9.39 @ 141 with TFS 235's.
https://ls1tech.com/forums/drag-raci...s-any-c-i.html
Also look at the dyno section and read through the results. https://ls1tech.com/forums/dynamomet...s-part-ii.html
I think the OP is headed in the right direction based on results.
The car dynos around 700rwhp n/a with a 388ci motor.
