[Steve C.]

"I want the power to kick in at around 2000 ish and see no real need to go over 6500 PRM's."


If your obtaining a 550--600 hp combo from Butler don't have too much concern about the torque/power level at 2000 rpm ! With the amounts on tap it will have little impact on your driveability.

[HWYSTR455]

I've gone back and forth on the whole dual plane / single plane thing, and finally decided to get a single plane and try it. The driver has Butler 310cfm E-heads (which they now call 315s), and I ordered a Hurricane. Was ready to do a swap one weekend, and started mocking things up. Well, there was no WAY enough meat on the Hurricane to make it seal on the head ports, period. (And forget gasket/port matching). Called Butlers's, and believe it was Rodney I spoke with, and he was like "Oh, right, only had about 1/16" gasket contact, huh?" . So, I went back to the RPM. (Did a better gasket match on it prior to tossing it back on).

Ace- Any chance there may be a revision on those Hurricanes that have more meat for contact/porting?

Steve - Curious how the RPM does for you, been thinking about it! Trace the contact area of the head ports on the gaskets for comparison/reference. (Or use new gsakets).

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