Author Topic: Gasoline for production motorcycle  (Read 6320 times)

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Offline mbuk

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Gasoline for production motorcycle
« on: April 11, 2013, 04:42:18 PM »
Hi all, I new to landracing and am wondering what gasoline production motorcycles use at bonniville. I am in the UK and want to get the bike setup with some simular fuel. Different altitude but closer than starting a fresh.

Andrew

Offline salt27

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Re: Gasoline for production motorcycle
« Reply #1 on: April 11, 2013, 05:05:50 PM »
Welcome Andrew,
Look in the build diaries under "Team Go Dog Go, partial streamliner".

Some of the more recent post addresses gas availability and compatibility.

 Don

http://www.landracing.com/forum/index.php/topic,6167.0.html

Offline Queeziryder

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Re: Gasoline for production motorcycle
« Reply #2 on: April 12, 2013, 01:32:44 PM »
Andrew,
VP racing fuel is widely available in the UK from people such as Hauser Racing in Rushden Northants.

I know from my racing days that both leaded and unleaded are available.

HTH
Neil
Old enough to know better, but too interested in speed to care

Offline wobblywalrus

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Re: Gasoline for production motorcycle
« Reply #3 on: April 12, 2013, 07:45:42 PM »
Andrew, what bike do you have and what events are you going to run?

Offline mbuk

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Re: Gasoline for production motorcycle
« Reply #4 on: April 14, 2013, 05:47:34 PM »
Hi, I have a Kawasaki KR1S and I am going to run in 250 PP class at speed week

Offline Queeziryder

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Re: Re: Gasoline for production motorcycle
« Reply #5 on: April 15, 2013, 05:16:50 AM »
Andrew
Go to the homepage of Eurodragster.com and there is a link for Sunoco.
Then work out which fuel matches the ERC event fuel

Either VP or Sunoco will have a match

Neil
Old enough to know better, but too interested in speed to care

Offline grumm441

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Re: Gasoline for production motorcycle
« Reply #6 on: April 15, 2013, 06:33:19 AM »
Hey Mbuk
Production is a tough class, and the most likely to be kicked out of impound for non compliance
just make sure you have read the rules as to what you require to run in production
G
Chief Motorcycle Steward Dry Lakes Racers Australia Inc
Spirit of Sunshine Bellytank Lakester
https://www.dlra.org.au/rulebook.htm

Offline Stainless1

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Re: Gasoline for production motorcycle
« Reply #7 on: April 15, 2013, 09:59:56 AM »
Bring lots of documentation to run PP, if there is a single aftermarket piece visible you are modified.
exceptions are chain guard, handlebars, wheels and tires.
Good luck with the project  :cheers:
Stainless
Red Hat 228.039, 2001, 65ci, Bockscar Lakester #1000 with a little N2O

Offline BVCBR

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Re: Gasoline for production motorcycle
« Reply #8 on: April 15, 2013, 02:28:28 PM »
The fuel you get at Speed Week will be ERC MUL-B. You can contact ERC and they will give you a close match of the other brands you have available that you can use to get your tune-up dialed in before getting to Bonneville.

http://www.ercracingfuels.com/

JW
970B 1000cc P-P
976B 1000cc P-P
977B 1000cc M-G/F

Offline wobblywalrus

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Re: Gasoline for production motorcycle
« Reply #9 on: April 16, 2013, 12:52:06 AM »
Andrew, the MULB specs are sorta secret, in my experience.  I could never get them.

Is the Kawasaki air or water cooled?  Does it have fuel injection?

Offline Queeziryder

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Re: Gasoline for production motorcycle
« Reply #10 on: April 16, 2013, 09:13:39 AM »
Bo
The Kawasaki KR1S is a parallel twin liquid cooled 250cc two stroke, similar to the Yamaha RD250LC
Runs on carb's

HTH
Neil
Old enough to know better, but too interested in speed to care

Offline Stainless1

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Re: Gasoline for production motorcycle
« Reply #11 on: April 16, 2013, 09:48:34 AM »
Andrew, the MULB specs are sorta secret, in my experience.  I could never get them.


Rick told me that MUL-A and B were about the same, some slight formula change... that was at the races after they switched from A to B.  Don't know why they have not updated the website to indicate B instead of A.  We were using A and then started using B.  Leaded 110K is also available.  I found more HP in my GSXR 1000 with MUL-B than with leaded 110K.  Used it in the bike and the car (same motor).
Stainless
Red Hat 228.039, 2001, 65ci, Bockscar Lakester #1000 with a little N2O

Offline wobblywalrus

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Re: Gasoline for production motorcycle
« Reply #12 on: April 16, 2013, 10:17:23 PM »
The Go Dog, Go! thread might have some good info about the procedures I went through to choose gasoline.  The gas I chose might not be the best for the stroker, however.  The Triumph engine is a completely different animal.

One thing I do is use a simple rule of thumb to convert the jetting at sea level to the elevation at B'ville.  The bike is jetted on the dyno at elev 120 feet for maximum power.  Jets are initially too small and the sizes are increased in steps until they are too rich.  The jets are chosen that make the most power.  Then I use the rule of thumb to adjust for altitude.  The Triumph is not very sensitive to jetting and it will run decent with jets that are one or two sizes off.  Basically, this means my lazy butt can get by with using the thumb rule.

Your production engine will probably not be fussy.  Some engines are and the dyno work will show this.  The engine is sensitive to mixture if a small change in jetting will make a big difference in engine heat or power.  In this case, the jetting needs to be more precise than by the rule of thumb.  The daily climatic data is posted at the ERC fuel trailer.  There are some graphs to use to get a better idea of the mixture change.  I have some but they are copyrighted so I cannot post them.  The fuel supplier or carb manufacturer has them.

It is easy to figure out how much the mixture needs to be adjusted using the graph.  The tricky part is to know the jet size change that will be needed to alter the mixture the desired amount.  This is where expert advice is needed.

The whole reason for this post is my experience with two stroke desert racing bikes.  They were more fussy than the typical four stroke.  I had to pay attention to mixture.  All of this sounds more difficult than it is in practice.       

   

Offline wobblywalrus

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Re: Gasoline for production motorcycle
« Reply #13 on: April 17, 2013, 01:33:56 AM »
Andrew, my approximate method is posted on the team go dog go website.  The more elaborate methods I cannot help with.  I hope this helps.