No more VP MR9...WHAT NOW?!

soetje & cbr9rider,

The MR12 is very similar to the MR11, same octane rating and both are oxygenated, we have not tested the MR12 but the MR9 & MR11 both work with the same mapping so the MR12 should work fine with our track map.

All are leaded fuels.

Quote: Originally posted by *EJ* on March 19 10

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Yes, same as MR9 & MR11

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Quote: Originally posted by *EJ* on July 16 10

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No and we will not test it, E85 (85% ethanol) does not make any power.

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Quote: Originally posted by *EJ* on September 27 10

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It has an ethanol content which is far too high compared to standard fossil fuels. It’s 85% ethanol and 15% pump gas.

E85 cars are actually closed loop and will self compensate by adding additional fuel on the fly. Bikes don't work this way, I believe it could cause engine damage from an excessively lean condition.

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Quote: Originally posted by Brock on October 09 10

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Swiftkart,

EJ did not relay my answer on the subject correctly, my apologies. 

Most current motorcycle fuel systems cannot easily support the additional fuel volume required to run E85. Currently, the proven exceptions to this rule would be the ZX-14 and the BMW. Our testing on (dual injector) Suzuki’s found little or no additional power gain due to the inability to properly deliver the correct A/F ratio on the dyno, which was even worse during the longer run time on the track, hence the (very general) no power statement. FYI: These tests were performed with single power commanders using the stock fuel systems, as we are in the bolt-on/plug-in business. Given enough time, expense, hassle—the power increase noticed from the higher energy value of the ethanol (combined with the reduction of inlet temperature) is undisputable. 

Because bikes do not have the ability to instantly adapt between E85 and pump gas, as a car would, and we do not consider forcing a customer to deal with any number of expense-adding/complicated means of adding an additional map, just to get home without fouling his plugs if they can’t find an E85 pump… we don’t support E85 mapping. For race use, we haven’t seen enough of a performance gain to justify the additional work/trouble/technical support issues for the minimal number of customer requests. BTW, the total number of requests is less than a handful since E85 was introduced. 

Although more expensive, we suggest powerful oxygenated race fuels, such as VP MR12, for an instant/measurable performance gain with very little additional trouble. 

I hope this helps clear things up. 

Brock

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I agree with you, most stock fuel systems won't work with the fuel, I am going to try some MR12, from what I'm hearing, it should do a lot better than the E85.

Thanks