New aftermarket LS3 heads.

[orange-prince]

[Ovenmitt]

MAST is also coming out with a splayed valve 11deg head for the LS3 thats supposedly even better then their current black label head.

Still no word from TSP, but I've got a feeling we're not far off. The heads were "on the engine dyno" last week

[orange-prince]

im waiting for the TSP heads

[FiveO]

Soooo many options!!!! I'm currently at 632 rwhp with a centri style SC setup and I'm unsure if purchasing aftermarket heads would be beneficial or just have the stock ones Ported. I don't know, so many damn options but not enough similar setups as mine with threads and/or post displaying their results.

[nuptualnemesis]

Originally Posted by the rich dude

TEA offers a CNC Port job for the L92 castings that flow

Flow Data

Intake Exhaust
0.1 67 53
0.2 150 118
0.3 226 173
0.4 287 219
0.5 332 247
0.55 347 255
0.6 353 264
0.7 368 266
Flowed on 4.030" bore @28"

I know TEA stuff always makes really good power. If I decide to stick with stock castings for my blower setup I'll get him to rework my heads. If I go aftermarket heads I'll be looking at these PRC Castings or the Mast Motorsports ones

I installed a set of TEA CNC heads in my LS3 with a 231/247 duration 113 LSA cam and lost 15hp. I read on the LS1 forum their main R&D guy (Bryan?) had said no plans to CNC LS3 heads because they were too efficient already. The company owner did a CNC program for them after the R&D guy left. They do make good cathedral port heads but not LS3/L92.

I called TEA and the owner said the usually add 10 to 20 hp. He said one person got thirty hp. This is not what they advertise on their web site. I pulled them and flow tested. They flowed 344/220 @ .600, with 2" velocity pipe. They might work on a bigger motor with some exhaust work but not on an LS3. They hogged out the intake to get the flow and lost velocity and power.

I worked with a local head porter and got my stock heads to flow 320/242. Mainly worked on the exhaust short side radius and recontured and laid back the outside of the combustion chamber squish area so the piston could push the air into the exhust bowl. I think Chevy was more interested in a clean burn than power. Every good racing head I have ever seen has a straight,slightly laid back, combustion chamber on the spark plug side.

We made a radical gear change between dynos so exact HP hard to say. Looks like it picked up the 15hp I lost with TEA plus 10 peak hp and 12-15 hp in the mid range.

[JETG]

TTT any more information on heads ???