just checking if anyone's had experience with this cam because ill probably be switching to it with this new engine(going to get it within a few days so tell me if it sucked), if you used it how did you like it? here she is. http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=802&sb=2
i plan on doing the weekend driving through-out the summer, at least 1 day per week plus driving it to the track
I tried to find the cam card for the cam out of my old engine, I think it might be the same. Dual plane intake, holley 600, and headers, worked very well for years until I rebuilt the short block, and went with a newer VooDoo grind. I'll see if I can find the cam card tomorrow in the garage.
DDB were you running the C4? or a standard tranny? and what heads? stall? and coolvettes im running the RHS aluminum heads 180 or 200 cc can't quite remember at the moment. and im quite stupid when it comes to vacuum.. i have no idea about it.
I have to agree with CoolVettes on this one. Really can't tell without more information on what your new motor is! I do agree about having some good flowing heads and exhaust with at least long tube headers. Unless you've got some stout gears in the rear and a manual trans this is going to be a bear on the street................IMHO
Well what i'm running is holley 650DP, edelbrock dualplane intake, RHS alum heads, 1.7:1 rollerrockers, hooker 6901's, .30over forged KB flat tops w/ valve reliefs, scat rods, HV oil pump..2800 stall and at the moment 3.50 gears. Edit: and all MSD if that matters box/dist/wires
I thought this cam was spec'd for 1.6 rockers. You should check with Comp because your 1.7's will change the lift. I think the 6901's are little on the small side being 1-5/8", but that will only make a difference on the top end. Also, I think the 3.50's would need to go and be replaced with 4:11's and I am assuming you've got a traction lock or other type of posi. What kind of static CR are you shooting for? What size chambers do you have in the RHS heads? I had a cam somewhat similar to this in my old 64 Comet, but I ran 1-7/8" full length headers, 4spd and 4:56 gears. She was a real screamer around town and back in the 70's ran in the mid to high 12's depending on which tires I ran out back, street or slicks. Oh yes, it was a real deal 289HiPro with highly mod'd 69 351w 4brl heads.
Thanks you for teaching me something new! i did not know that the rockers will change the lift..as for that cam..with 1.7's changing the lift its a NO GO, my heads say .560 max and that will push it up to .578 lift..so which means i have to go down to a XE274 which works out to .556 lift after the calculation and here it is: http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=801&sb=2 or also i actually have this cam laying around..has like 300km's on it and this is the specs on it http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=800&sb=2 i also really wanted to put 3:89 or 4:11 gears in it so that will help aswell.
on the XE274 cam the lift works out to be .556 my max is .560 lift, that would most likely be cutting it too close?
Out of all those you've listed I'd go with the XE268H. Should be very responsive with the shorter duration numbers and very good lift with your 1.7 rockers.
After looking at the specs on those cams, they suggest NOT using stock springs. (7). Make sure the suplied springs on the heads, have the the nessisary pressures needed to hold the valves open or closed.Compcams can tell you whats needed for any of their cams. 180 heads are great for street or track use on a dual purpose motor. I suggest a cam approx 230-240 duration @50. 500 - 540 lift with 1.6 RR. 380 -411 rear with a posi.Use a 28in tall tire.jmo
You know, they best thing to do would be to call or fill out one of the cam sheets on their web site. Personally I have never been a fan of Comp, but Dave or Tom Crower (if you talk with him make sure you know everthing about your heads, open spring pressure, valve stemp length, spring diameter, roller rocker type, push rod diameter, static CR, weight of car, trans type, stall..........etc) and get some suggestions. You can do the same with Comp and I'd ask one more, whoever you choose. Also tell them you have 1.7 roller rockers and don't want to change to 1.6......................this will make a huge difference when they give you the cam number. I looked at the RHS heads, and didn't get much info, but did notice the runners are on the small size...............not bad, just not really big, so maybe, depending on the CR the 1-5/8 headers may be a good starting point. As my friend Chris always says (owner of SPD Exhaust) it's better to start out too small than go to large. On my Maverick's old motor (and refreshened new motor) which was putting out somewhere North of 700hp ATC (the new motor with new cam should be North of 750hp and if I tell you the specs then I'll have to have you wak'd), I ran a stepped header, 1-7/8" x 2", and will continue to use them on the new motor. Not saying the guys on this forum don't know what they are talking about, but the cam guys do this for a business.....................and their business depends on them making the right decission................IMHO
