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

 

Nobody

 

I can't be a valid judge as I've never heard either. I upgraded to a 224/236 .535/.555 on a 114 lobe sep. Those should sound a little more radical then my nitrous energyy extreme. But I still am not happy with mine. So I should have went bigger.

ZMAN

 

The fact that the XFI cams are so new I can't find anybody that has one to get their opinion on it. Right now I am leaning towards the CC466 because it looks like it would be a great daily driver cam and also the fact that Comp has put alot of time in designing the cam just for the LT1 engine. How do you think this cam would idle? More lope than my current CC305? Any help would be great

 

Although I've never heard of it either (CC466) it sounds like something John Lingenfelter would've liked...relatively small duration, high lift, little wider LSA. I would think it would be a good street strip cam, and a lot of fun stop light to stop light. I went 11s for years with a 211/219 .533/.560. on a 112 which was LPEs signature 383 grind and I loved it.

I freshened the top end of the 383 this year with a Joe Overton grind with around 22X/23X .568/.568 on a 111 and its awesome. Imho, don't get too carried away with big duration. I've always loved smallish duration with high lift.

My neighbor has the 503 with 1.6 rockers. Its got a good lope to it and idles around 750. Mine has a good choppy idle at 950...

Based on the specs I would suggest the 466, but I would ask knowledgable cam gurus first...Remember there's always "custom" stuff, too..

--Alan

 

r6 I'm going to be going with the 466. I was deciding between the 467 and 466. I like the duration on the 466 better for street driving and there isn't that much diffrence in lift. Just my opinion.

 

Cool, thanks guys

 

I've got the CC503, and I'm quite happy with it. It's actually quite tame in a 383, and makes good power across the rev range.

The XE series of cams have a lobe design that is known to be hard on valvetrain components, though, so you need to spend some cash to get good parts to go with it.

I'm running...

Comp 918 beehive springs
Crane Gold roller rockers
Comp Chrome Moly pushrods
Comp Pro Magnum hyd-roller lifters

 

503 is teh hotness

 

if you're looking for something a bit more radical than the 305 the 503 would be my choice over the xfi cam. the xfi will have less overlap than even the 305 which most consider pretty tame anyway. Also without the 918 springs you have no hope of controlling the valves. the xfi takes the absolute best pushrods and rockers also. when you run wicked lobes you need everything else to match. but i think if you want something with a little bit choppier idle the 503 will fill the bill, and should work with your current springs and the rest of your setup.

 

That is great info, so you don't think a 986 double spring would be able to handle the XFI cam? Even though the XE lobes are hard on the valvetrain the XFI would be worse? I know with all that lift the valve guides would take a beating and being I have stock heads I may want more duration than lift anyways right? I forgot to mention that I have Comp hardend pushrods as well, the rockers are made by ProForm.

 

the xfi lobes were designed with extensive use of a spintron for use specificly with beehive springs. I really have no doubt that the 986 will end you up with valve float way too early to make good hp. the xfi isnt necessarily harder on parts, its just that to get the hp out of those lobes you have got to have the valvetrain nailed down pretty good. otherwise you get deflection and valve float and you just threw away all the benefit (and then some) of the more agressive valve action. the valve guides wont really take a beating anymore than with a regular xe cam .025" extra at the valve isnt really much in the grand scheme of things. when you start crossing the .600-.650" lines and start using rocker arms with crazy ratios.. then worry about your valve guides. otherwise just make sure your geometry is right and it should last fine.

on the pushrods for xfi stuff the ones i'm refering too are the hi-tech line which run about $100 a set... not the high energys that are about $35. and the proform rockers while fine for regular usage arent stiff enough or light enough for xfi duty imho. the important thing to remember is that the stiffer (lifter pr and rocker side) and lighter (valve, spring, retainer) you can make all the parts is going to be of great benefit to you in the upper rpms, but recent tests have also shown gains in the midrange to also be substantial from this. on the downside the price increase from all these things is also substantial.

more duration than lift is a can of worms i really dont wanna open up here, everybody has thier own opinion on that. my advice is that if you want a little choppier idle just go with the 503 it'll probably work just fine if all you're after is a little choppier idle, and it'll work with the parts you already have, and still wont be a pain to drive every day.

a last note on the xfi's... that 113lsa that comes with those cams off the shelf isnt something i agree with for a small block chevy. those lobes can do a lot with the right parts and the right selection of lsa and icl however imho the shelf ones leave something to be desired.

 

Of your 2 choices I would go 466 without hesitation.

 

Those are some very strong points you made, the one thing I didn't like about my CC305 is that it didn't lope all that much at idle. The CC503 with a little more intake duration and the 112LSA should do the trick. I really don't feel like redoing my valvetrain so it looks like I will be putting a CC503 in my new motor. Also looks like it could get pretty expensive to properly run the XFI cams.

Thanks again WS6T3RROR and the rest of you guys for the help

 

Comp calls for the 918 valve spring for the 466 XFI cam.