Join Date: Apr 2009
Location: South of Boston
While they are right, they are still leaving a fairly important part out. 87 will make more power because it burns faster/easier/at a slightly lower temperature, however, that's only of you don experience detonation. The high compression ratios of these bikes create high internal cylinder temperatures. Compressing air and fuel causes them to heat up just by the nature of the beast. And with high CR's and low octane fuel, it sometimes gets too hot, and the fuel burns before TDC, before the spark plug fires. Pretty bad for just about all your motor's internals. So if you can run it with no pinging, you will make more power. Sometimes you can even run it seemingly with no problems, but then when you start to really hammer on it a lot, that's when it start to detonate.
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2006 ZX-10R Mitsubishi Sunset Orange, shaved turn signals, full Sato exhaust. And some other goodies.