*THE RUNNIN MAN*
Banned
i heard the same thing aboiut the busa....run 87....i was runnin 87 with no issues for years and decided to start runnin 89 since i bought the m109 i figured i couldnt dare run regular in that beautiful machine...so why deprive my busa too...lol....but 87 always did my busa great!!!im running a jri rear shock, it looks similar to a pensky drag shock. It has a 750lb spring on it, (i have it set to 3/8" of sag at the tail light) and im at 63". And im running 87 octane because it makes the most power besides running oxygenated race gas. You guys should try it if your not already running it. I wouldnt run 91 unless i was spraying, boosted or running higher comp. Pistons. 87 is your friend if you have a stock motor![]()