Which one, U4 or Mr12???

[gazx10]

mr12 has some downsides. requires specific tune, short shelf life opened, super sensitive to temp.during storage, strong odor, $$$, must be drained and flushed, makes other oxygenated fuels seem like babies milk, but if u want it all and are willing to deal with the maintaince, this is your fuel.

[1420SS]

what kind of a/f do you guys tune mr12 to?

[Cycle Concepts]

I have a head/cam package with raised compression. I've been using U4 and have turned some good numbers using it but I'm wondering if MR12 would be a better race fuel to use next year?!?!

What do you guys think and why?

get you a pale of each and go to the dyno...that is really the best way to know what your bike/engine is gonna like better between the two..I have done this several times using mr12/mrx01 and no two times has one fuel outperformed the other fuel in very similar builds..Just recently had a 1070 gsxr1000 where we thought mrx01 would be the better fuel, guess what it made more power with mr12..I personally don't think the fuel is the exact same every time we buy it from VP..but my point to all this is, you are gonna have to experiment alittle bit to know for sure which fuel is best for your package..

[teezy]

I wanted to see the difference or gains from one to the next. Mainly to see the power vs cost difference. Im here in texas and have a good friend that lives in San Antonio who can swing by the VP RACING plant and pick it up for me so the price is cheaper... So I decided to buy a pail of MS109 and MR12. THe bike already had U4.4 in it. This is the break down on my bike.

COST
U4.4........... $74.00............. 5 gallons
Ms109......... $60.00.............. 5 gallons
Mr12.......... $110.00............. 5 gallons


DYNO NUMBERS
U4.4...................... 213whp 121wtq
Ms109................... 215whp 123wtq
Mr12...................... 216whp 124wtq


What I will say is that the tune from u4.4 too MR12 did not require any real adjustment. MS109 required alot. As far as power and torque the graph literally chased each other up the rpm band.


Sidenotes!!!

*MS109 smells bad!!! If you leave it sealed in your garage or in the bike it will stink up the place. Put it in a fringe if you have one in the garage. You can spray up too a 200 shot on it acccording to VP

*MR12 is just nasty!! Make sure after you run it you flush it out with something else. Everyone says it will ruin fuel parts. The throttle response on MR12 is worlds better then MS109 or U4.4 even if the dyno doesnt show the gains.



NOW E85 VS MR12 VS Q16
We dynoed one of the shop bikes today with MR12 in the tank. Its very humid today FYI... The results


MR12.............223 whp 132 wtq
E85................216 whp 127 wtq
Q16................217 whp 129 wtq


Sidenotes!!

*MR12 is 22.00 a gallon vs E85 at 3.16
*E85 also sign off early making peak power at 10,200 vs 10,500

On a customers bike we tested pump gas 87 vs u4.4

pump gas......187whp/104wtq
u4.4.............197whp/107wtq


KEEP IN MIND ALL THE BIKES ARE TUNED TOO THE FUELS!!!

I know that some of the fuels say pour in and go but we found that all the fuel required tuning it get the power out of the fuel.

[jojos750]

I wanted to see the difference or gains from one to the next. Mainly to see the power vs cost difference. Im here in texas and have a good friend that lives in San Antonio who can swing by the VP RACING plant and pick it up for me so the price is cheaper... So I decided to buy a pail of MS109 and MR12. THe bike already had U4.4 in it. This is the break down on my bike.

COST
U4.4........... $74.00............. 5 gallons
Ms109......... $60.00.............. 5 gallons
Mr12.......... $110.00............. 5 gallons


DYNO NUMBERS
U4.4...................... 213whp 121wtq
Ms109................... 215whp 123wtq
Mr12...................... 216whp 124wtq


What I will say is that the tune from u4.4 too MR12 did not require any real adjustment. MS109 required alot. As far as power and torque the graph literally chased each other up the rpm band.


Sidenotes!!!

*MS109 smells bad!!! If you leave it sealed in your garage or in the bike it will stink up the place. Put it in a fringe if you have one in the garage. You can spray up too a 200 shot on it acccording to VP

*MR12 is just nasty!! Make sure after you run it you flush it out with something else. Everyone says it will ruin fuel parts. The throttle response on MR12 is worlds better then MS109 or U4.4 even if the dyno doesnt show the gains.



NOW E85 VS MR12 VS Q16
We dynoed one of the shop bikes today with MR12 in the tank. Its very humid today FYI... The results


MR12.............223 whp 132 wtq
E85................216 whp 127 wtq
Q16................217 whp 129 wtq


Sidenotes!!

*MR12 is 22.00 a gallon vs E85 at 3.16
*E85 also sign off early making peak power at 10,200 vs 10,500

On a customers bike we tested pump gas 87 vs u4.4

pump gas......187whp/104wtq
u4.4.............197whp/107wtq


KEEP IN MIND ALL THE BIKES ARE TUNED TOO THE FUELS!!!

I know that some of the fuels say pour in and go but we found that all the fuel required tuning it get the power out of the fuel.

GOOD INFORMATION!! Thanks for posting

[Okcboi]

I wanted to see the difference or gains from one to the next. Mainly to see the power vs cost difference. Im here in texas and have a good friend that lives in San Antonio who can swing by the VP RACING plant and pick it up for me so the price is cheaper... So I decided to buy a pail of MS109 and MR12. THe bike already had U4.4 in it. This is the break down on my bike.

COST
U4.4........... $74.00............. 5 gallons
Ms109......... $60.00.............. 5 gallons
Mr12.......... $110.00............. 5 gallons


DYNO NUMBERS
U4.4...................... 213whp 121wtq
Ms109................... 215whp 123wtq
Mr12...................... 216whp 124wtq


What I will say is that the tune from u4.4 too MR12 did not require any real adjustment. MS109 required alot. As far as power and torque the graph literally chased each other up the rpm band.


Sidenotes!!!

*MS109 smells bad!!! If you leave it sealed in your garage or in the bike it will stink up the place. Put it in a fringe if you have one in the garage. You can spray up too a 200 shot on it acccording to VP

*MR12 is just nasty!! Make sure after you run it you flush it out with something else. Everyone says it will ruin fuel parts. The throttle response on MR12 is worlds better then MS109 or U4.4 even if the dyno doesnt show the gains.



NOW E85 VS MR12 VS Q16
We dynoed one of the shop bikes today with MR12 in the tank. Its very humid today FYI... The results


MR12.............223 whp 132 wtq
E85................216 whp 127 wtq
Q16................217 whp 129 wtq


Sidenotes!!

*MR12 is 22.00 a gallon vs E85 at 3.16
*E85 also sign off early making peak power at 10,200 vs 10,500

On a customers bike we tested pump gas 87 vs u4.4

pump gas......187whp/104wtq
u4.4.............197whp/107wtq


KEEP IN MIND ALL THE BIKES ARE TUNED TOO THE FUELS!!!

I know that some of the fuels say pour in and go but we found that all the fuel required tuning it get the power out of the fuel.

Good info, you don't say the build of the bike that you ran the U4-Mr12 in but I know it's not stock producing 213-216whp's. And to gain 3hps from U4 to Mr12 and having to pay like $36 more for it might be worth looking into......Thanks man, I'll definitely be tuned for the fuel as well.

[teezy]

Good info, you don't say the build of the bike that you ran the U4-Mr12 in but I know it's not stock producing 213-216whp's. And to gain 3hps from U4 to Mr12 and having to pay like $36 more for it might be worth looking into......Thanks man, I'll definitely be tuned for the fuel as well.

I have a Rearick Racing cam package 1397cc Hayabusa.... I made those numbers when the motor was fresh.. She has since made 218whp/127wtq now that she has many passes. I run MS109 all the time and love it. Runs great on both motor and dope. I have run the bike on MR12 on motor with no gains from the MS109.

[jojos750]

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