bcarpman

Yep, I'm looking for the EFI model, although your lift specs are higher than I've seen elsewhere. Are those the actual stock cam specs, or just Crane's sort-of-stock cam for that motor?

I've been repeatedly told the LSA of 114 makes a huge difference in idle (as it should).

Pat McPherson

Hi bcarpman,
You and I may be corresponding about a set of L-29 heads that I have.
Anyway, I have a 1999 7.4MPI (L-29) engine that I have tried different combinations; head mods, cams...
I have consulted with Tyler Crockett, RM Builder, and other vary helpful people here on OSO...
IMO the L-29 heads are not a great choice for a 475+HP 496 stroker.
They will require more work than it is worth and larger intake valves for sure. The heart shaped combustion chamber makes it difficult to install lager valves there for $$...
L-29 heads would be a great choice for building a 420-430HP/454 cube Gen V or Gen VI from a 300-330HP base engine...
An HP500EFI is a great cam choice. I bought a take-out from Strippoker and will be installing it in my 502 soon.

bcarpman

I'm curious what equation you used? In my GM days, if I had a question like this I'd ask someone in the analysis group to run me some engine simulation numbers during lunch. Can't do that anymore, and overkill anyway. Sometimes these "rough calcs" can be very usefull. I'd like to see what they come up with for the reworked L-29 heads.

Irishtornado

Just curious how this project went and second I know Raylar and Tyler Crockett are the gurus regarding the 496, but I'm on a sorta budget regarding my upgrade project and am looking at either just buying a stock HO cam and finding a good flowing set of heads and having them worked or could someone else make a recommendation on a little more agressive cam than the HO and some good aluminum heads that will bring the 496 alive?

Thanks...Oh by the way I'm not the engine builder on this project so when you start talking duration etc. I'll be lost.