[Stan Weiss]

Originally Posted by Jay S

Here are screen shot of Jim Hands actually results with the KRE’s written by him.

When he pulled the KRE’s he went back with 6X heads and found another 10 or 15 cfm over what he had before. I think Stan has them listed in his data base, they flowed into the 260s. The time slips are from the 6x heads after the KRE’s. Jim had #64 head which flowed about this same 253 number. Rocky Rotella has one, he showed it to me, it was leaking coolant was why he quit running it. I am not sure if that is when he tried the KRE’s.

After the KRE’s he ported some 6X heads that flowed well into the 260s, which is also when his car was the quickest. The comparisons were also with the same Bullet cam. It used pretty aggressive HFT torque profiles on the intake. When it went back to 6x heads he went back to his old Wolverine cam. Time slips are with the Wolverine.

Does anyone know if the port center line length of the Iron and KRE heads is the same? If I had more information I could do some more calculations.

This is CFM per 1 cc of port volume for each head.

► 253 / 165 = 1.53333

► 273 / 186.5 = 1.46381

Stan