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Old 01-03-2013, 08:26 PM
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Originally Posted by hcompton View Post
Tech how do you think that will run when compared with an actual blower cam in the same basic size.

12-400-4 - Blower & Turbo Hydraulic Flat Tappet Camshafts

It does not appear the current cam will be bad. Certainly not as bad as the 30-30 cam would be. But would the added midrange of this cam make it worth it to swap out. I dont do too much with roots style blowers. And never with smaller cams.
All I know is what I learn from talking to the engineers and racers who run this stuff. Blower Drive Service says that they have consistently had better results on gasoline with a 110 LSA, so that's the info I pass on to others who ask. They say that you may want to open up the LSA for alcohol, but tighten up to 110 on gasoline.

I wouldn't hesitate to use a 300hp cam with a small blower. Now, if you were to get serious with a 6-71 or 8V-71, then yeah, I'd want to stab another cam in there and re-piston the motor for forged and 8.00:1 or lower SCR.
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