TFS on 08 Ls3 Vette?
TFS on 08 Ls3 Vette? A friend of mine just bought a LS3 Vette and want's to put Trickflow 225's or 235's heads and a ported Fast 92mm with a Cam in the 230-240's duration.
The question in hand is has anyone made good power on a LS3 with a combo like this?
The question in hand is has anyone made good power on a LS3 with a combo like this?
Exactly! Why bother when 500rwhp is essentialy headers, a cam and a tune away. not to mention the new Street Warrior manifold is due out soon as well. 3500 or so is alot to waste for little to no gains.
I would advise him to get a set of longtubes and a decent cam first. But again if he has money burning a hole in his pocket by all means go for it. Just does not make sense to me HP/$ wise
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can someone just explain to me how the **** tfs heads and a 240 cam with longtubes "isnt going to gain much" over stock???
it must be because you guys think the L92 heads are realy good. That's true, but I still think there would be gains by going to the TFS' and of course the cam is a no brainer
it must be because you guys think the L92 heads are realy good. That's true, but I still think there would be gains by going to the TFS' and of course the cam is a no brainer
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We got 62 hp and whatever tq with a mild cam and an underdrive. This car already had LTs and exhaust.
Seems a waste to spend the money on a set off heads that probably wont get you much if any.
Seems a waste to spend the money on a set off heads that probably wont get you much if any.
But if he ported and milled the L92's he wouldn't gain any power?
That's like saying if u have a Ls6 Vette and u put TFS 215 heads and a ported Fast it would not gain much power because the ls6 heads flow just fine for a 346 , a couple mave made over 500 wheel with the Trickflows. All i'm saying is there anyone that has hard evidence they will not make more power than the stock L92's! I for one do not think its worth the money but he does and would like to see some hard proof he wasting his money.
That's like saying if u have a Ls6 Vette and u put TFS 215 heads and a ported Fast it would not gain much power because the ls6 heads flow just fine for a 346 , a couple mave made over 500 wheel with the Trickflows. All i'm saying is there anyone that has hard evidence they will not make more power than the stock L92's! I for one do not think its worth the money but he does and would like to see some hard proof he wasting his money.
Last edited by raymond mckinney; Jul 21, 2008 at 07:11 PM.
My .02 cents, keep the LS3 heads, send them to Rich at WCCH for the CNC port job, get a custom cam, ported LS3 intake and TB, UD wouldn't hurt and a real good tune. 500 rwhp is nothing to sneeze at. Plus he has a little spray if he needs it too.
A cam only setup will make 475-490. A few have made over 500, Mine included. Add heads, and expect to pick up ~20 or so.
The TFS will loose from 5000-7000, but pick up with the small runners below 4000.
Its a trade off. Big port, big power/big RPM, small port, good midrange, less overall HP.
You wont make 520 rwhp with a heads/mid 230s cam with a cathedral port on an LS3, nor will it make 485 rwtq.
Tell him to try it. I have, and its not worth the money in the heads/intake.
Louis
The TFS will loose from 5000-7000, but pick up with the small runners below 4000.
Its a trade off. Big port, big power/big RPM, small port, good midrange, less overall HP.
You wont make 520 rwhp with a heads/mid 230s cam with a cathedral port on an LS3, nor will it make 485 rwtq.
Tell him to try it. I have, and its not worth the money in the heads/intake.
Louis
Louis, So you're saying u have tried a 225-235cc Cathedral head out on a LS3 and lost power, what were the heads and what exactly did the combo do that u didn't like.
To all, take in mind that i am learning also.
To all, take in mind that i am learning also.
It didnt do anything I didnt like, it just lost big power, To the tune of 20hp or so starting at 4000 or so.
Its all the same 205 vs 225 vs 235 argument- 205s make killer low to midrange power, but will not make as much as say a 225 up top. However, down low, the 225 will not perform like the 205.
Same goes for the 225/235 vs the LS3 head. You cant measure throttle response and snappiness of combo on a dyno. Thats where the cathedral port will win, but pure power, it would have to be a pretty radical setup to match that of the LS3.
Its just physics. You need to look at YOUR combo, and what YOU want to do with it. Bigger isnt always better, but HP/Dollar, if you have an LS3, throw a cam in it and save the 3500 for a good set of heads/ported FAST AND the FAST firewall mod.
Its all the same 205 vs 225 vs 235 argument- 205s make killer low to midrange power, but will not make as much as say a 225 up top. However, down low, the 225 will not perform like the 205.
Same goes for the 225/235 vs the LS3 head. You cant measure throttle response and snappiness of combo on a dyno. Thats where the cathedral port will win, but pure power, it would have to be a pretty radical setup to match that of the LS3.
Its just physics. You need to look at YOUR combo, and what YOU want to do with it. Bigger isnt always better, but HP/Dollar, if you have an LS3, throw a cam in it and save the 3500 for a good set of heads/ported FAST AND the FAST firewall mod.
It didnt do anything I didnt like, it just lost big power, To the tune of 20hp or so starting at 4000 or so.
Its all the same 205 vs 225 vs 235 argument- 205s make killer low to midrange power, but will not make as much as say a 225 up top. However, down low, the 225 will not perform like the 205.
Same goes for the 225/235 vs the LS3 head. You cant measure throttle response and snappiness of combo on a dyno. Thats where the cathedral port will win, but pure power, it would have to be a pretty radical setup to match that of the LS3.
Its just physics. You need to look at YOUR combo, and what YOU want to do with it. Bigger isnt always better, but HP/Dollar, if you have an LS3, throw a cam in it and save the 3500 for a good set of heads/ported FAST AND the FAST firewall mod.
Its all the same 205 vs 225 vs 235 argument- 205s make killer low to midrange power, but will not make as much as say a 225 up top. However, down low, the 225 will not perform like the 205.
Same goes for the 225/235 vs the LS3 head. You cant measure throttle response and snappiness of combo on a dyno. Thats where the cathedral port will win, but pure power, it would have to be a pretty radical setup to match that of the LS3.
Its just physics. You need to look at YOUR combo, and what YOU want to do with it. Bigger isnt always better, but HP/Dollar, if you have an LS3, throw a cam in it and save the 3500 for a good set of heads/ported FAST AND the FAST firewall mod.
I've heard power cuts off around 6300 w/LS3 manifold. A better cam that works up to 7K rpm should give you better results with TFS heads and 90mm manifold based on my research.
Hmmm, you have two very seasoned engine builders here saying its a waste of money and one is also a well known race driver, yet no one seems to listen to the advice given by them. Guess I don't understand why.
That's because everyone on this site knows everything about everything. When 2 respected sponsors state first hand experience and it is disputed it is just ridiculous.
Amen, after LG pops in with thier personal advice not selling anything, hell shut the thread down.
LS3/L92's are the future so the intakes will catch up. I am going LS3 topend/cam and not looking back. Hell, you cant beat mild cams and 500+rwhp.