CC503 or CC466 (XFI) }{ Cam

[r6bullet]

Hey guys, I will be installing a new motor in my car soon as my current one has bearing problems. I just installed a CC305 cam (oil pressure problem not cause by cam swap) and it sounded and ran great, but I would like something just a tad bigger so I was thinking about the CC503. I have read a bunch about this cam and it seems like everybody that has one likes it, after looking around I saw one of Comps new XFI cams that I might like. I like the fact that the XFI cams are newer and better designed for the LT1, the one I was looking at is the CCA-07-466-8. How would this cam compare to the CC503?
How do you think the CC466 would lope at idle? Less or more than my CC305?
Also the car has stock heads and manifolds, 1.6 rockers, Comp 986 double springs, SLP Loudmouth II.
I know headers would help out but I need to pay for a new short block first.

Here are the specs on both cams

CC503= 224 int./230 exh. 0.503/0.510 lift 112LSA (1.5 rocker) 1,800-5,800 RPM

CC466= 218 int./224 exh. 0.570/0.565 lift 113LSA (1.6 rocker) 1,800-5,800 RPM


Any help or comments would be great, thanks

[r6bullet]

Nobody?

[metalbeast]

Comparing the two cam lifts with the same RAR, I see that the CC503 has 0.537/0.544. The duration of the CC466 is very similar to the Hotcam. With the 113 LSA vs the 112 LSA, the CC466 should lope less than the CC503.

[slow260z]

IMO go with the 503 and 1.5 rockers. That's what I did. The LT1 heads aren't flowing much at >.500" lift unless you have CNC'd heads so why beat the valve train with little or know pay back?

The 503 give nice bottom end and pulls hard through the RPM band. I think it is the best cam for mild ported (pocket and gasket matched) aluminum heads.

I plan to go to the track in a week or two, and have Nos to try if all goes well.

Good luck

[N20Dave]

Given the information I would go with the 503 for unported to mild ported stock style LT1 heads. It will provide the most "bang" for the area under the curve of maximum valve lift and the extra duration will help the weaker heads. It could lope a little but is that a bad thing?