Reply to "engine hp"

Marc,

If you haven't purchased pistons yet, you need to do something about the compression.

In regards to the cam, I would prefer to know what kind of cam it is (flat tappet, roller, hydraulic, solid) and who makes it & the model no. or part no., I can then go to their web site & take a lookee at the lobe centers, etc.

But before recommending specific parts for the motor, I would really like to know what you are trying to achieve, what is important to you about the various aspects you're building into this motor, the many ways you intend to use your car.

Two more comments:

First: As a generality single plane & dual plane intakes will "cross" or make equal torque somewhere around 5000 rpm. Below that rpm the dual plane intake makes more torque, above that rpm the single plane intake makes more torque. Since our motors tend to make peak bhp above 5000 rpm, the peak bhp number will be less with a dual plane intake. But if you look at everything below 5000 rpm, the dual plane intake kicks ass on the single plane intake.

If you want the looks of the single plane, I understand & you need not be self conscious about saying so. I'm just explaining the give & take of the choice. If you want to wind the motor out way above 6000 rpm the single plane is the way to go.

Second: I prefer not to shoot for high peak numbers. I wish the magazines would emphasize the highest average torque over the powerband. For a street car that would be 1500 to 6000 rpm. A wide flat torque curve will yield the highest average torque.

A tilted or sloping torque curve, the kind drag racers shoot for, will yield higher peak values, but they don't yield the most average torque and such a torque curve wont be the fastest on a road track, or on the street.

It takes a period of reprogramming your mind, as to what is desirable, before you can overcome advertising & think this way. Of course, the peak torque & peak bhp numbers do little to give you the information you need once you've reprogrammed yourself, so then you go around like me, dissatisfied because nobody provides relevant data. lol......

So tell me us about how you will be using your car, the goals you have for the motor.

Your friend on the DTBB, George