Will someone look at my cam and explain what I am seeing? I was surprised to see a 228 / 226. For some reason I was thinking that turbos were the other way around. Maybe I am a little crazy since the weather has me stuck in the house. This was the cam chosen for the combo and it does work quite well, but I think a custom one may work better with the LS3 heads???? I am looking for a bit more lowend tq and stock like manners.

LS3 heads, 370 CI, TC76 (.96AR exhaust), about 9 to 1 comp, vic intake and 85mm tb.

 

Advance the cam you have or go smaller about 10 deg at .050.
The reverse split you have is a better match to the small TC turbo turbine.

Actually, with that small turbine a 216/216 would probably do what you want.
Any smaller and you might as well but an LS6 cam in it.

Your current cam is a better match to a GTS or bigger turbine. (75mm +).
The TC has a 68mm.

 

i would think with ls3 heads you would want a sinlge duration cam or split duration not a reverse split due to the giant intake valve in the ls3 heads.

 

That is what I was thinking too. I thought I was going crazy.

 

That would be because your ignoring the turbine.
75mm turbines back up at 5k on a 350.
People run TC's on 5.3's.
The 68mm turbine is small for a 346 -period unless you want to shift at 5500.
More duration/overlap just lets the back pressure back into the cylinder
Never going to make more power at 6k with little turbine so might as well go small cam and pick up power off boost. Or get a GTS.

 

I agree with dudeman and TurboS10. The cam is wrong and the turbo is wrong. I would change both. In this case 2 wrongs do make right though.

 

I need you to explain this so I can sleep at nights.

 

I think Cobrakiller and TurboS10 are saying that the cam and the turbine are wrong for each other in this size motor. But, if you match a smaller cam with the small (for that motor) turbine you can still make good power with what you have (two wrongs making it right).

 

Thanks! That does make sense. I ran a 10.15 at 135mph using 11# of boost and most of the power was in by 5200 RPM. I knocked .40 off of my ET by lowering my shift from 6500 to 5500. I am moving back to a more street car like maching and I want to take advantage of as much low end torque I can. I had looked at a Z06 and a few other cams to replace this one.