Quote:
Originally posted by RACER X #99
...the Yates type Cylinder heads of the Cleveland. 358 CI Nascar engines have been dynoed at almost 800 hp at 9,500 rpms. And this year those heads are being updated with even better flowing ports to catch up with the SB-2 Chevy and Dodge sb heads.
RD
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Looking for a better head than the Yates? Ford already has a significantly better head than the Yates, it's the SC1. To be more specific, it is an SC1 from Don Losito at Ultra Pro. Don is (or at least was) the only one that can get the raw casting from Ford. He then does extensive welding to the raw casting to allow it to be machined to Chevy SB2.2 valve angles. Chevy valve angles combined with the Ford combustion chamber allow it to make substantially more power than the Yates. They're not legal for Nextel Cup which is one of the reasons why Cup engines pale in comparison to dirt Late Model engines.
Scott