280Zone Posted August 20, 2004 Share Posted August 20, 2004 Any advice on how to select a cam? I have a pretty much stock 70's V8, headers, Edlebrock intake, Edlebrock 650 cfm carb, stock heads. Not looking for anything real wild just a little bit more than stock. Car is used at the 1/4 mile track on occasion. thanks Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted August 20, 2004 Share Posted August 20, 2004 Depends on what the heads are set up for and what lift they can handle. There are alot of variables to look at. Do you know what springs you have. Seat pressure? etc.. If they are stock then maybe find out what cam was used in the stock application and just go a step or two over stock..small torque cam! Mike Quote Link to comment Share on other sites More sharing options...
Guest 77vegasz Posted August 21, 2004 Share Posted August 21, 2004 As a rule of thumb, stock Chevy heads can handle up to .450 lift without a problem. Look at your real usage of the car, and the rpm range driven the most. Keep you tourqe curve in that rpm range, and you will be very happy. Do not get carried away chasing horse power on a daily street driven car. High lift and high hp cams make power up in the rpm range that you will not be in. Look for a cam that has a power band 1500-4500 rpm and that will be you best bet for street. Jon Quote Link to comment Share on other sites More sharing options...
Pyro Posted August 21, 2004 Share Posted August 21, 2004 No info on your compression ratio, diff gear, or transmission used. But this is some general guide lines I like the CompCam 260. Works great on stock engines (low cr, weak valve springs, and stock converters). Plus improves highway MPG. A comp 268 is a little bigger but would required new valve springs and a 2200 stall converter if an automatic is used. And will run best with 9:1 cr. Quote Link to comment Share on other sites More sharing options...
Mike C Posted August 22, 2004 Share Posted August 22, 2004 Pyro is right on for a mostly stock motor. However, I would run the Energizer 266 from Crane. Specs almost identical to the Comp 260, but cam AND lifters the same price as just the cam from Comp. Quote Link to comment Share on other sites More sharing options...
Pyro Posted August 22, 2004 Share Posted August 22, 2004 Mike C What is it with Z's and old chevy trucks! I have noticed a lot of Z owners also have the 67 to 72 chevy trucks like you. The Z and the 67 to 72 chevy truck have something in common, somehow.....? I also have a 70 chevy C10 LWB, built 410 BBC, TH400, AC, PS, PB, front disk brakes, 5 lug conversion, 3.08 limited slip diff, 4" front and 6" back lowered body. Quote Link to comment Share on other sites More sharing options...
Mike C Posted August 22, 2004 Share Posted August 22, 2004 Good question. There does seem to be a lot of us. I like to chalk it up to good taste. Tim240Z has one also! FWIW, my 70 big block truck is for sale if anybody is looking for a clean tow rig. Quote Link to comment Share on other sites More sharing options...
Pyro Posted August 22, 2004 Share Posted August 22, 2004 I know someone here in San Antonio that might be interested. What are the trucks specs and how much are you asking? Quote Link to comment Share on other sites More sharing options...
Tim240z Posted August 22, 2004 Share Posted August 22, 2004 It must so that we have a vehicle to steal motor mounts from for the JTR conversion Quote Link to comment Share on other sites More sharing options...
Mike C Posted August 23, 2004 Share Posted August 23, 2004 Sorry for the thread hijack... It is a 1970 GMC C2500. It is medium bronze with a white top. Original paint. Big block 402, TH400, factory air, power steering, power brakes. Disc conversion. Crower 270 cam. Proform HEI, JET Stage II 750 Q-jet. It has a leaf spring Dana 60 in the rear with 3.54 gears. 2 1/2" aluminized dual exhausts. It has a pullout Alpine tape deck with 6 disc changer, crossfire 4x100 running kicker separates and a 10" sub, all under the front seat. Full foam seat with orignal upholstery. Unripped! Rubber bed mat, Drawtite Class IV receiver hitch. Electric brake controller. ProComp ES3000 shocks. Original step bumper. 16x7" American Racing wagon wheels, 265 75 16 radials. Truck runs great. Gets 13mpg in daily driving. I bought this planning on keeping it forever, but with 3+ the dog now, I caved in to the extended cab thing. 138k original miles. The onlyu thing it really needs is a drivers rocker and a set of valve seals wouldn't hurt. Here's a pic. Shoot me an email and I can send you some more. I'm pretty firm at $4500. The Alcoas and the toolbox in the photo both are destined for my '02 GMC. Quote Link to comment Share on other sites More sharing options...
Pyro Posted August 23, 2004 Share Posted August 23, 2004 very nice! I'll pass it on.. Quote Link to comment Share on other sites More sharing options...
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