Speed Secret # 7

[jim_howard_pdx]

A 2V Cleveland head, Australian closed combustion chambers would be my choice, and a cam about the same as the E roller should put you at 400 hp with 11 to 1 compression. Stepping up to about 575 lift at 255 degrees at .030 will put the 2V at 475 hp with the same compression.

Just do the pop up trick I outlined in speed secret 1 keeping a very tight quench throughout the combusion chamber.

Using the 4V cleveland head with the 575 roller cam will put you about 520 hp. I use those port plates they make for the heads, both intake and exhaust to improve the flow. They work GREAT. If you can afford the SVO cleveland aluminum heads, these will easily put you at 525 hp with the 575 roller cam.

Hope this helps.

What were you going to do for the intake side of your cleveland project?

Hey, keep me informed on the 351 C. I am going to do a 302 Boss engine for a Miata with 180 mph in mind. About 500 horses at 8,500 rpm is what I am hoping to hit. I am going to use the 351 Block, a destroked crank and 6.45 length aluminum rods and probe or Ross light weight pistons. The rod ratio will be 1.195 but the swept length will be 9.45 inches which is much more than a small block chevy ( 3.5 + 5.4 = 8.9 inches). This will be a torque beast as well as a good upper rpm performer....perhaps a perfect engine....if I can get it to fit in the engine bay? I expect over 400 ft lbs of torque on the engine from 3,500 to 5,500 rpm, and over 300 ft lbs of torque at 7,000 rpm!

Now I need to cut the weight on that Miata, cause it weighs 3,300 lbs with the aluminum 4 cylinder engine. With the 351 windsor block I will weigh as much as a new Mustang!

I really want a MAS EFI for this application, but will probably have to go single plane and a throttle body speed density FI system. I just have to find a friend that will smog certify me when I am all done. Luckily I have one or two that will help me if I beg and do some favors in return.