quote:Originally posted by 73 l:
so the high swirl heads are they 4v style or 2v or something different? i like the fact they produce good hp and torque but are they too much for the street?
Here's a link to the thread regarding SCM (Scott Cook Motorsports) heads.
Scott Cook Heads
The SCM heads are a modern head, designed by Darin Morgan, designed in the spirit of the 4V head. They are a stuffed 4V port head, the same concept as the CHI 3V head. The port inlet is about the size of a 2V port inlet, but the opening is raised so that the roof of the port is the same height as the roof of a 4V port. To look at it a different way, start with a 4V port, fill in the left hand side of the port and fill in the floor of the port until it is approximately the size of a 2V port.
Darin Morgan designs induction systems for Reher Morrison Racing engines, he's a recognized authority on the subject; he teaches induction system design, and he has written a text book on induction system design. I believe it is an awesome opportunity for regular Joes like you and I to be able to purchase a product developed for our cars by someone with the professional credentials of Darin Morgan.
Imagine bolting a set of these heads on your 351 cubic inch motor, adding a mild hydraulic roller cam like a Crane HR216, and having about the same performance as a Corvette LS7 motor. They are not "too much" for the street. They can be as mild or as wild as you want them to be. I don't need 560 BHP personally, 400 BHP is just fine (scary enough for me). From my point of view, as a life long fan of the 4V Cleveland motor, these heads provide the opportunity to jump ahead 40 years and modernize the 4V Cleveland with state of the art technology. Just the way the original 4V heads were state of the art in 1970.
A lot of guys want to talk dyno numbers and air flow numbers ... that's fine ... but these motors all produce way more power than street tires can harness. Personally I am amazed by the width and flatness of that torque curve.
-G