Reply to "Edelbrock Clevor"

You can make 500, 600 or over 700HP with the CHI 3V heads right out of the box, without spending $20K. I spent that kind of money to ensure as much as possible that things would not break.

A Dart Iron Eagle block can support 2000HP and in that sense it is overkill. But my thinking was that if I am making only 600HP, it probably won't break and I will only spend the money once. I am a big fan of only spending money once!

Again my objection to the Edelbrock heads is that they get all the publicity because of the shear weight of advertising muscle Edelbrock wields.

If you are a car magazine and Edelbrock is pushing a new head, you ar going to do a positive article on it because almost assuredly they have ads for their products in their pages. Unfortunately there is no unbiased Consumer Reports comparison for aftermarket Cleveland heads.

Based on my experience and two years of researching what is available I would be willing to bet that a side by side comparison would prove that the CHI's make more HP and TQ on identical test mule motors.

If the Edelbrocks require additional porting and other work to make the same power, what is the upside? I just don't see it.

My 427CI Clevor, with the CHI3V, 218cc intake runner heads and 10.5 to 1 compression, had a best dyno pull of 713HP @ 7000rpm and almost 580 ft/lbs tq at 5600rpm. The torque was over 500 ft/lbs around 3200 all the way to the 7000 rpm redline. The heads were not modified or ported other than matching to the intake.

I have not read one article that suggests the Edelbrocks are capable of this level of performance out of the box.