Dyno tested...... Mastermind Ported 660 vs Stock 660 vs Dual port 660

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I couldn't believe that these numbers were correct.......I argued with Ron that he was crazy. I said no way in hell was this correct.

But it is. He finally got it thru my thick head.

http://www.percentagecalculator.net/

All this time I've been doing it in my head. I shoulda known there would be a web page for it. WHat are the chances of that? ;) Prolly 100%
 
Now let's see what that tuned pipe will do

nice to see the whole power band it's important too me at least don't just run my saws at max rpm it's hard to be as accurate when milling timber for finish product
 
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