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Old 08-03-2009, 12:37 AM   #1
notsofast
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Race fuel advantages

My bike has been run on race fuel and I want to revert to pump gas. Do I need to drain it dry or can I just top it off with pump gas. The engine is stock so I am not sure how much of an advantage the race fuel is anyway?
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Old 08-03-2009, 12:41 AM   #2
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If the engine is stock, race fuel wasn't helping it at all.
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Old 08-03-2009, 06:08 AM   #3
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Answer: Mixing it with pump gas is fine.

As far as performance advantages (or not), here's all you need to know:

http://www.motohouston.com/forums/sh...ghlight=Octane
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Old 08-03-2009, 05:07 PM   #4
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Thanks guys - I like the smell of it more than pump gas but Shell's finest it is......$ bucks $ talk $.
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Old 08-03-2009, 05:11 PM   #5
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Mixing it will be fine as Racer997 said. With that said, a stock motor can benifit from race fuel. It does not sound like you need it, but I'm just saying
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Old 08-03-2009, 05:23 PM   #6
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Yep, the exhaust valves will stay cleaner longer on the race fuel. Plus if running carbs, I highly recommend the Race fuel, unless you are willing to clean the pilots fairly regular.
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Old 08-04-2009, 08:40 AM   #7
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Quote:
Originally Posted by tiatool View Post
If the engine is stock, race fuel wasn't helping it at all.
I ran race fuel in my bike even when it was stock and could feel a noticeable difference. Have not ran it in a long time, though.
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Old 08-04-2009, 08:44 AM   #8
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i run race fuel in my s-vizzle....but i also took my bike to the dyno to get mapped for it. if you're gonna pay the bucks, might as well make the most of it.

oh yeah, before the map, i only gained around 1 hp, with the dyno tune and map i got 4.73hp
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Old 08-04-2009, 08:50 AM   #9
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Quote:
Originally Posted by Mr Richards View Post
I ran race fuel in my bike even when it was stock and could feel a noticeable difference. Have not ran it in a long time, though.

You must have run the oxygenated stuff, which does boost power, 'cause octane ain't gonna increase horsepower on its own. If you felt a difference with octane alone, it means that your ignition timing was less than optimum for pump fuel (yet mapped correctly for race spec fuel), or it meant that your engine detonated on pump fuel (and ran hot and lost power because of it), and race fuel's octane stopped this condition.
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