Hemi Heads for SBF

[olddog]

Originally Posted by cycleguy55

]




Specs:

• Comes with 2.200”/1.650” Competition Series Stainless Steel valves

$4,995 per set

The valve sizes bugged me, so I looked up the Cleveland 4V heads. They are 2.19"/1.71" and the Chrysler Hemi Heads from the 1960's are 2.25"/1.94".

Also at first glance I realized these are not a true Hemi head. However when I looked more closely these are far from a Hemi head. I'm not sure they are deep enough to require a domed piston. They quoted a chamber CC that sounds like you could use a flat top piston.

Now that said, the Hemi head design has its problems. So maybe they solved a lot of problems with this design. However I'm not sure they will outperform a set of CHI heads.

[69boss429]

Originally Posted by olddog

The valve sizes bugged me, so I looked up the Cleveland 4V heads. They are 2.19"/1.71" and the Chrysler Hemi Heads from the 1960's are 2.25"/1.94".

Also at first glance I realized these are not a true Hemi head. However when I looked more closely these are far from a Hemi head. I'm not sure they are deep enough to require a domed piston. They quoted a chamber CC that sounds like you could use a flat top piston.

Now that said, the Hemi head design has its problems. So maybe they solved a lot of problems with this design. However I'm not sure they will outperform a set of CHI heads.

These heads look almost identical to Kasse Boss 429 heads in the combustion chamber.
Probably didn't hurt that Greg Brown who makes them used to work for Jon Kasse

[Cobra #3170]

Originally Posted by 69boss429

These heads look almost identical to Kasse Boss 429 heads in the combustion chamber.
Probably didn't hurt that Greg Brown who makes them used to work for Jon Kasse

Poor FE, like a red headed step child. A nice wedge with the intake valve moved toward the center of the chamber would be nice. Nothing out there for us, we have to struggle on with milk truck design heads.

[xlr8tr]

Originally Posted by Cobra #3170

Poor FE, like a red headed step child. A nice wedge with the intake valve moved toward the center of the chamber would be nice. Nothing out there for us, we have to struggle on with milk truck design heads.

IIRC you've managed to squeeze more than a few ponies out of your stepchild!

[Topfuelhydro]

Originally Posted by olddog

The valve sizes bugged me, so I looked up the Cleveland 4V heads. They are 2.19"/1.71" and the Chrysler Hemi Heads from the 1960's are 2.25"/1.94".

Also at first glance I realized these are not a true Hemi head. However when I looked more closely these are far from a Hemi head. I'm not sure they are deep enough to require a domed piston. They quoted a chamber CC that sounds like you could use a flat top piston.

Now that said, the Hemi head design has its problems. So maybe they solved a lot of problems with this design. However I'm not sure they will outperform a set of CHI heads.

The pistons should look very much like this one.