CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted February 21, 2005 06:33 PM
This is a Must Read!!!
I copied this from Brock Davidsons site...
Well, after convincing ourselves that VP MR9 fuel wasn't as hard on Fuel systems as Nutec.....SURPRISE!
We have THREE bikes with DEAD fuel pumps after leaving this stuff in the tank for over a month!!
Retail price on an "in the tank pump" (Hayabusa, GSX-R 1000 etc.) is right at $500.00
It is a $1500.00 mistake we don't want you to make!!!
According to our sources (American Suzuki included.) MR9 will not damage the pumps if left in the tank for a day or so....or even as long as 1 week. But anything close to 1 month...it's over.
They recommend draining the tank and running pump gas through the system after every use. This is what the road race teams do before they head back home. They are also careful to COMPLETELY SUBMERGE the pump in gas...not just add a little for the flush.
I have posted previously that we had not seen problems leaving MR9 in the tank between weekly trips to the drag strip...BUT, one Hayabusa test did keep loosing mph as the season progressed?
HMMMM.....if MR9 completely destroys a fuel pump in a month, I wonder if it will slowly hurt performance before it dies completely?!
In the same breath, BOTH of our GSXR1000's ran their best MPH's at the last race and they did not have pump gas in the tanks during the entire season?! Each bike was raced at least once per week.
This is a new mystery to solve....
We will figure it out and pass the news on to YOU!
I'll keep you posted,
Brock
brock@brockracing.com
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Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
   
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MadMike
Moderator
FEAR THE BLACK FLAG!!!!!!!!
Posts: 6579
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posted February 21, 2005 07:04 PM
very interesting!!! for sure.
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200-MPH CLUB MEMBER!
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osti33
Needs a job
Posts: 2973
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posted February 21, 2005 07:17 PM
Thanks for sharing the info.
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zrxdean
Needs a job
Posts: 2225
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posted February 21, 2005 09:22 PM
Good info. One more argument for boost or spray 
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entropy
Moderator
Posts: 8671
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posted February 22, 2005 01:56 AM
hmmmmm, i haven't been running MR9, but i do run vp c-44; prolly a good idea to test the pump output presssure.
thanks for the info.
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This moderator uses moderation in moderation
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rac4it
Needs a job
Bergie
Posts: 3009
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posted February 22, 2005 04:45 AM
Seems like a lot of trouble when you can just go up one jet size :-)
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