what octane gas do you use in your stock HP 500??

87


Stock 2002, 500 EFI's

87-89

Missed you last thursday at our first St Louis oso gathering

Later
Dave

By the book, 87 in 500 EFI

89 oct on 500efi 2001 model, 178 hrs runs great.

87-89 in my EFI, it does not like anything higher.

89 in 1999 HP500s (150 hours), no problems.

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!

hey JJ, maybe that is why you are going 7mph slower!!! LOL!

jbk

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.?
Later
Dave