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Author Topic: Racing Fuel  (Read 1964 times)

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Offline Chris08Bus

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Racing Fuel
« on: May 02, 2014, 10:58:34 AM »
What are people running for race fuel on natually aspirated bikes with high-ish compression ratios?  I was looking at the VP website at both leaded and unleaded fuels.  Looks like a good choice for leaded would be MR12 or C12, and unleaded would be C10.  I ran some MR12 at the Harvest Event last year and it seemed to run really well but at $150/5 gallons, that's pretty pricey.  Hayabusa compression ratio (stock) is 13.1:1.

Offline sabat

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Re: Racing Fuel
« Reply #1 on: May 02, 2014, 12:19:52 PM »
MR12 will make the most power, but you need to richen your tune for it- preferably on a dyno, or with your own wideband O2 sensor.

Offline Roland6250

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Re: Racing Fuel
« Reply #2 on: May 02, 2014, 11:25:53 PM »
MR12 delivered an extra 21hp on the dyno for me.

Offline Chris08Bus

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Re: Racing Fuel
« Reply #3 on: May 04, 2014, 06:34:24 AM »
I plan on running Autotune with my PCV. Will that be enough or is it worth a visit to the dyno?