Anyone have any advise on swapping a stock ZZ502 cam.
Currently:
9.6:1 compression
aluminum oval 110CC semi-open combustion chamber.
dual plane intake
850 Holley vac. sec.
hydraulic roller 110 degree centerline
527/544 lift
224/234 duration
370 gears
28" tires
Turbo 400
Stall 3400 ?
power brakes
Looking for more upper end power on pump gas.
Is this to radical?
Crower HYD roller 245/253 @50 612/636
If not, what other mods would be required besides, springs, lifters, carb, fuel pump?
Thanks

Ray - That's the cam I have in my chevelle and wifes camaro. Pulls good to 6300 RPM, maybe even higher but havented wanted to! We also have 1.8 roller rockers. I kinda wish I went withe the next bigger one though. We are at a very high corrected altitude, so if your at lower elevations it may be different.

Lee

Is this to radical?

Looks just right!

Ray,

what are your goals? why looking for upper end power?

Is this in a lightweight chevelle?

Carb is fine. Just for example I run 125 mph with a box stock 850 pulling barely any measurable vacuum.

Thanks for the input. My goal is to have a reliable street car that runs high 11's. The car seems to run out of steam around 5K. It's not horrible but I would think a cam swap would be fairly easy and would be well worth the effort. Just not sure how big I should go. I'd rather not make any head modifications $$ at this time. I'm also concerned with manifold vacumm for power brakes. I'm pulling about 15" at idle now and the brakes work fine. The car is all steel w/ac so I would guess it's pretty heavy for a Chevelle.
BTW 70_Chevelle, the Camaro and Chevelle look Awesome!

Had that cam in last year ....11.0's......I also have had my heads ported .....The cam will help alot....I went to a solid roller...To bad I didn't know sooner ....Just sold the cam and springs etc.....Good luck....... graemlins/thumbsup.gif