Hello Folks. I need some help deciding which cam to go with.

For a 1964 Chevelle SS, mostly show. I want the car to run hard, but not run into low vacuum or overall overheating, or plain and simple, PROBLEMS.

Motor:
-355
-11.1 compression
-Pro Action 220cc heads
-Victor Jr Intake, or RPM Air Gap, have both.

Car has a turbo 350, with an EDGE Performance 3000 Stall, 3:55 rear end gears. 1 5/8 long tubes, electric fans, blah blah blah.

Here are the contenders:

Comp Magnum 286 (230/230 .570 110)
Comp XE (230/236 .510/.520 110)
ThumpeR Series (227/241 .513/.498 107)

What do you guys recommend? Thank You A MILLION!

 

comp cam ex284

 

I agree the Comp XE (230/236 .510/.520 110) would best suit your set up.

 

I would also go with the xe284, but I would get it on a 112lsa to boost low end and vacuum. That is a pretty big cam for a street 350.

 

I agree also that the cam selection of the three is on the large side, you may also want to consider a slightly smaller cam due to the weight of your vehicle. If you go with that much cam, you may loose the grunt required to get that big chevelle moving and keep it running at peak power. Out of the three the Comp XE (230/236 .510/.520 110) had the best numbers on a simulation that I ran, but a slightly smaller cam actually made your car a little quicker in a simulated 1/4 mile.

 

My 10.6:1 minirammed 385 with that Comp XE 230/236 but with a 112 lobe separation angle:

http://www.ws6transam.org/transamidle.wav

Works nice, has 381 RWHP on a Mustang Dyno, which is about 460 to 480 at the crank. You'd like it. It's a little torque shy under 2000 RPM but peaks on torque at 4000 RPM and runs to 6300 RPM before falling off.

850 RPM idle. about 12 to 14 inches of vacuum.

 

Those are pretty big heads. I wonder why you are limitng your choices to those cams? What rpm do you want this thing to run to? That converter with 3.55's is going to keep you from using a cam to really complement those heads, IMHO. I'd ise a smaller cam unless you are willing to change the gear and/or converter, but you will be leaving some of the hp available from the heads on the table.

Rich

 

so what you guys are saying, is you guys reccomend a smaller cam then the three I have chose from. What would you guys reccomend, something like a 220/224 112?

 

Rich, this thing probably will never even see 6200rpm's. What cam would you reccomend?

 

Something with an intake duration in the 215-220 range with 110-112 LSA.

Rich

 

If its just a show car and all out performance isnt mandatory,I'd use the ThumpR camshaft you have listed.

Those heads are pretty big,that thing needs some 3.73's and definately use the air gap over the single plane IMO.

 

Hey Rich one more thing, which manifold would you reccomend: Victor Jr, or RPM Air Gap?

 

Performer RPM. You might consider cutting down the plenum divider a bit.

Rich

 

Im not big with carb setups, as you can see my car in my sig. What is the difference between the single and dual plane manifold? As far as power and torque goes?

 

dual plane=tq
single= make power up high

I have used that 230/230 cam........no tq.