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Author Topic: U4.4 fuel  (Read 5390 times)

Offline 00Busa

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U4.4 fuel
« on: February 10, 2011, 07:48:25 AM »
Have any of you guys ran this fuel at the track or on a dyno and compared it to MR9/12 ?
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'00 Busa / '06 1K / '12 HD-SG
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Offline badass1000

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Re: U4.4 fuel
« Reply #1 on: February 10, 2011, 11:02:35 AM »
from what I have heard:  mr12 is going to make more hp then u4.4 NA.  say on a good runing gen 2 gain 3 or 4 hp on u4.4, gain 7-9hp with mr12.  I can get u4.4 for $64 for a 5 gallon pail.  mr12 was around $100 I believe.

mr 12 is 87 motor octane.  u4.4 is 103 motor octane.

my experiance.  09 busa with gen one valves, hd valve springs, and web 395/378.  I was runing premium pump with no problems and bike was runing good.  i am runing around a 75hp shot of nitrous on it so I sarted runing a 50/50 mix of pump and 105 mon sunoco supreme.  bike ran fine on nitrous, but lost a couple mph n/a.  I started useing u4.4 and n/a it ran about the same as premium pump to maybee slightly better.  talking .5 to 1 mph in the 1/4.  On the nitrous I think it picked up a couple mph over the 50/50 mix.  

I believe on a stock compresion engine you will not gain much with u4.4 because of the high octane.  if you want maximum n/a power mr12 would be best.  if you have something with very high compresion the u4.4 may work great compared to runing c12.
The u4.4 suites my needs for now.  I think I will try runing premium pump and 25% q16 this year to see how that works.  If it works it will be alot cheaper per gallon then strait u4.4.
« Last Edit: February 10, 2011, 11:04:47 AM by badass1000 »
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Offline 00Busa

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Re: U4.4 fuel
« Reply #2 on: February 10, 2011, 05:22:32 PM »
Yeah it's a stock motor. I just never seen any numbers from anyone that had used it. Guess I'll stick with MR12
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'00 Busa / '06 1K / '12 HD-SG
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Offline signal9

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Re: U4.4 fuel
« Reply #3 on: February 22, 2011, 08:08:56 AM »
stock motor gen 1.  170whp on 87 180whp on u4.4. 
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Offline dadofthree

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Re: U4.4 fuel
« Reply #4 on: February 22, 2011, 11:53:47 AM »
With the right fuel you might get into the 11's  :wink:






 :hys:
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Offline ft campbell busa

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Re: U4.4 fuel
« Reply #5 on: February 22, 2011, 03:00:11 PM »
Like above, I ran exactly 1mph faster on U4.4 than pump gas. It does work in N2O applications! The oxygen content is lower than MRXO1 plus higher octane. If you are stock and keep the gas no more than a 40 shot then I say MRX01. After that U4.4 or q16.
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Offline 00Busa

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Re: U4.4 fuel
« Reply #6 on: February 22, 2011, 08:05:59 PM »
Quote from: dadofthree on February 22, 2011, 11:53:47 AM
With the right fuel you might get into the 11's  :wink:
:hys:
Don't make me post my tickets ... You would be VERY surprised !!! :mrgreen:
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'00 Busa / '06 1K / '12 HD-SG
BE SAFE - HAVE FUN !
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