General Category > Quadrajet Carb Talk and Tips
cam selection
Cliff Ruggles:
Tough call there. Wider LSA will idle better and slightly broader power range and peak cylinder pressure slightly. I think you'd be OK either way......Cliff
tayto:
I'm running tbi heads, apparently they start to run out of steam around 4500 rpm if that helps?
will the 112* help more with my higher compression?
Cliff Ruggles:
It will add some overlap but also close the intake early if you put it at 108ICL.
Sort of a trade off, but I think I'd go 112LSA with those heads to pull power down slightly and tighten up the power curve for the RPM range.....
lightning boy:
The GM845 cam would be a good choice for you as well if your running a late model block with a step nosed cam. they ran alot of these in 350's making good power. they have a fuel pump lobe.
tayto:
--- Quote from: lightning boy on October 07, 2019, 10:09:31 AM ---The GM845 cam would be a good choice for you as well if your running a late model block with a step nosed cam. they ran alot of these in 350's making good power. they have a fuel pump lobe.
--- End quote ---
I believe cam is discontinued but crane still grinds it. Too bad crane thinks their cams are made out of gold, over $600 canadian, howards cam is $380.....I was also told by a fellow that played around alot with TBI heads that they really like straight pattern cams and to not have more than a 5* split in duration. The Howards cam fits this bill and is 10* more than the TPI cam thay Cliff recommended.
Cliff, I assume the 108 is already ground into the cam when installed "dot to dot". I could figure out when the intake closes and check my dynamic compression. I could install it "straight up" on a 112* ICL??
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