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Discussion Starter #1
andbody runing mr9 or mr12 if they got a motor with alot of comperssion?
 

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how much compression are you running? IMO go with mr9 instead of mr12 bcuz the 12 is real tempermental to heat.
 

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Discussion Starter #3 (Edited)
not sure 13.5:1 pistons and a decked head:dontknow:
 

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higher comp.

ive also read mr12 can be a little erratic in high heat, but you dont want any detonation period. i dont think u even have a choice with ur motor, mr12 only, especially in this heat. even the lightest detonation, the kind we cant sense, destroys hp. if i ever have the chance to finish my bike, gotta try 12 after all ive read. mr9 is great fuel, designed for stk.comp. sportbikes. 12 designed for higher comp. modified motors as yours, i wouldnt be surprised if this fuel isnt tempermental, when run with the compression it was designed for, as in your motor. let us know what u decide and how it turns out. good racing toney.
 

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not sure 13.5:1 pistons and a decked head:dontknow:
you could run mr9/12 and be okay with 13.5:1..but you may like mrx01 and see how that works for you as well..I seen the mr12 make 10 hp over pump gas on a customer's bike just recently...built motor with high compression pistons..:thumbsup:
 

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Discussion Starter #6
you could run mr9/12 and be okay with 13.5:1..but you may like mrx01 and see how that works for you as well..I seen the mr12 make 10 hp over pump gas on a customer's bike just recently...built motor with high compression pistons..:thumbsup:
thanks im runing MRX01 now i was just thinking MR12 might be better.
 

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Discussion Starter #7
ive also read mr12 can be a little erratic in high heat, but you dont want any detonation period. i dont think u even have a choice with ur motor, mr12 only, especially in this heat. even the lightest detonation, the kind we cant sense, destroys hp. if i ever have the chance to finish my bike, gotta try 12 after all ive read. mr9 is great fuel, designed for stk.comp. sportbikes. 12 designed for higher comp. modified motors as yours, i wouldnt be surprised if this fuel isnt tempermental, when run with the compression it was designed for, as in your motor. let us know what u decide and how it turns out. good racing toney.
if i run the mr12 i will post the turn-out good or bad:thumbsup:
 

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mr12

10hp? cams in a can! yeah, ive heard reports of 6-12 hp on some engine combinations. ive also read mr12 required more fueling on some bikes, im benchracing, cycle concepts can give u a experienced answer to that.
 

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10hp? cams in a can! yeah, ive heard reports of 6-12 hp on some engine combinations. ive also read mr12 required more fueling on some bikes, im benchracing, cycle concepts can give u a experienced answer to that.
with my 15+ years of building/tuning, I've never seen any fuel do the same exact thing in two different bikes..even those with the same engine combos..With my 1070 cc motors I start with a base map that I have developed and every single time I load it into a pc and start tuning, i have to tweak it here and there to get a/f where I want it..so some combos like alittle more and some like alittle less..hope this answers your question..:thumbsup:
 
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