515 HP. Trick Flow LS1 top-end engine kits.
LS-6 Intake
http://i67.photobucket.com/albums/h2...packageLS6.jpg
Fast 90 Intake
http://i67.photobucket.com/albums/h2...mpackage90.jpg
How much does 540 FWHP translate to at the tires ? 460-470 with a 228 cam! Imagine what would happen if the heads were milled to 58-59cc and and 240 camshaft is installed. You would probably make 570-580 fwhp which is exactly what all the 490-500 rwhp guys are doing with these heads. Those packages are very well thought out and proven but may be a little on the conservative side for most people on this site. It is my understanding they were designed to deliver good power with good driveability and still be easy to tune. The TFS 215 is about as good a head as can be bought for the 3.900 bore engines 5.7 engines regardless of what this flowbench or that flowbench says.
LS-6 Intake
http://i67.photobucket.com/albums/h2...packageLS6.jpg
Fast 90 Intake
http://i67.photobucket.com/albums/h2...mpackage90.jpg
How much does 540 FWHP translate to at the tires ? 460-470 with a 228 cam! Imagine what would happen if the heads were milled to 58-59cc and and 240 camshaft is installed. You would probably make 570-580 fwhp which is exactly what all the 490-500 rwhp guys are doing with these heads. Those packages are very well thought out and proven but may be a little on the conservative side for most people on this site. It is my understanding they were designed to deliver good power with good driveability and still be easy to tune. The TFS 215 is about as good a head as can be bought for the 3.900 bore engines 5.7 engines regardless of what this flowbench or that flowbench says.
The Best V8 Stories One Small Block at Time

you have 3 basic choices....
5.3L heads (853? i think)
5.7L heads (241)
LS6 heads (243)
for well under $2000....and even under $1500 you could get a set of those heads, with a decent port job and mate it to a good cam and make 420-450rwhp (500+ at the crank).
how much exactly will depend on the cam, the heads and you particular car setup.
I actually calculate stock compression around 10.25-1 with stock 67cc heads. With the 64cc heads I calculate around 10.55-1. Most all of our customers have us mill the heads down to 61cc to get close to 11.0-1.
LS-6 Intake
http://i67.photobucket.com/albums/h2...packageLS6.jpg
Fast 90 Intake
http://i67.photobucket.com/albums/h2...mpackage90.jpg
How much does 540 FWHP translate to at the tires ? 460-470 with a 228 cam! Imagine what would happen if the heads were milled to 58-59cc and and 240 camshaft is installed. You would probably make 570-580 fwhp which is exactly what all the 490-500 rwhp guys are doing with these heads. Those packages are very well thought out and proven but may be a little on the conservative side for most people on this site. It is my understanding they were designed to deliver good power with good driveability and still be easy to tune. The TFS 215 is about as good a head as can be bought for the 3.900 bore engines 5.7 engines regardless of what this flowbench or that flowbench says.
Mike and Brian are awesome to deal with as well. Very professional and informative.
Last edited by robz*; Jan 22, 2008 at 02:57 PM.
I do have the fast 90 though.
you shouldn't have a problem making 460 - 480rwhp with the proper heads, cam and INTAKE, with very street-able cams. if you want to go more wild, do it. you can get 500whp. you're gonna be spending A lot of money, make it worth your dollar. 490 - 500whp is attainable with a well thought out combo. its all about the parts you use, and the tune.
can you give us some info about the car? auto? stick? gearing? weight? how hard do you want to rev it? is it carb'd or FI?
that way we can help you select a cam for this setup that'll get you gobs of power and still remain very streetable.
EX: i just installed an ms3 in my buddies camaro, and honestly, besides a bit of bucking at really low rpm's (sub 1400), and the choppy idle, the car drives very well. this is a pretty damn big cam for a little 346, and even with the stock tune the thing drove great! with the stock 3.42 gears you did notice the bucking just a little, but the car's a 6 speed so he just slipped the clutch a little off the light and it was fine. now, the power comes on a little later in the rpm's, around 4 grand, but when it does its nice! with an auto, the bucking would be more noticable.
the specs on that cam are 237/242 .603"/.609" on a 112 lsa. a cam with pretty simmilar specs would be capable of 500whp h/c/i, with the right combo. compression is also going to play a big role in making a number like that.









