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Old 01-20-2003, 05:16 PM
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what octane gas do you use in your stock HP 500??
 
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Old 01-20-2003, 05:21 PM
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87


Stock 2002, 500 EFI's
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Old 01-20-2003, 05:53 PM
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87-89

Missed you last thursday at our first St Louis oso gathering

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Old 01-20-2003, 09:21 PM
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By the book, 87 in 500 EFI
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Old 01-20-2003, 10:01 PM
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89 oct on 500efi 2001 model, 178 hrs runs great.
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Old 01-21-2003, 07:09 AM
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87-89 in my EFI, it does not like anything higher.
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Old 01-21-2003, 07:42 AM
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89 in 1999 HP500s (150 hours), no problems.
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Old 01-21-2003, 10:32 AM
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the higher the octane #....the less btu it has....in short, run 87 in that engine....

racers...yeah we also pay near 4 bucks per gal to go slower!
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Old 01-21-2003, 11:54 AM
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hey JJ, maybe that is why you are going 7mph slower!!! LOL!

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Old 01-21-2003, 02:01 PM
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maybe its all the additional weight of the new paint what kind of rpms are you spinning if its the same and your using the same props maybe its your speedo, and if your using a gps now and werent then, then maybe you havent lost the 7 mph and in that case go back to your old speedo to find it.
it sounds as if you change quite a few things and its just a matter of dialing back. did you change props gears etc.?
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