Yates Heads on the street?

[RRD]

First, thanks to all for the input. I appreciate it. Today I spoke with Bennet, Craft, Comp and Mckeown Motorsport. Bennet advocated the biggest cam with the largest centerline; like mid 240"s at 112-114 degrees. Mar Mckeown took the most time, was the most analyitical and, at least to me, seemed for this task to be the guy I'm going with. Here's the deal, minimum low to mid 230's at .o50, 109-110 degrees. Maximum mid 140's; lots more power, but start to pay some driveability price... Hydraulic roller .575 to .600 lift. Not a valve spring maint hog at all, he says probably won't have to touch them for several years unless starting to tread much in the 6500 -7400 rpm area. No thanks, don't need it. Probably will be hard to keep under 550 hp anyway. What's 1900 divided by 550?? Certainly low enough for me... He told me that Yates himself was originally a diesel mechanic, and that Yates still runs his own team's engines with a longer stroke and larger dished piston than others; says it's all about building cylinder pressure, and they do not like over 110 degree centerline at all. Mark says he has a lot of dyno time, street motors to Grand National and Pro Stock to go by. Good enough for me. For anyone interested:

Mark Mckeown
Mckeown Motorsport Engineering
Nanjemoy
MD
20662

301-246-9225

...Good Guy (not that the others are not...)