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2mm more is as big as you can go. Butterflies might be more difficult than you think to make and work correctly. Luckily The company that makes them is down the street. 800 pro stock is a toss up on whether they are worth it. Bigger cc's in prostock version might benefit but you really need much larger if you can get a T-body bigger. The ones here are 2000.00 and up for any size you want. Just not ISR leagal......... Hopefully this changes tho....
 

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Discussion Starter · #4 ·
ProStock regulations here is 0-1110ccm. Just weight index after how many ccm you are. 800ccm=296kg(590) with pilot on.
So i have to race trippels up to 1110ccm. Crankshop-hooper-price-- 2-3-4CYL.. All in one class.
Only advance i got is the weight. No regulations on timing-fuelsystem etc.. No studds are allowed. Suspention have to be 75mm, No other regulations on boggie.
So you see.. Its hard to win on a Firecat..
 
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