You run 87 with that high of a comp ratio ? The manual says 91...so does the ECU drop the timing down if you run 87 ? Does anyone else run 87 ?????my 04 made more HP on 87 than 93 and had approx 4* ign a advance. Don't lug it , no worries. I only run 87 in both my 07 ZX10R and my 07 ZX14. Any higher is just burning $$$'s. ...and that's with 10% corn fuel bull shit gas.
You know I had a coworker that raced (I think sprint cars) on weekends & actually ran #1 plate for many years... & he told me they looked for the lowest octane gas for that same reason (able to create more horsepower with the faster burn). I always told him that that cannot be true, cause gas pump marketing tells me I need the more expensive supreme :lol:It's odd but that's what he said. Would be interesting to throw it back on the dyno with 87... The theory is you can unleash more power with lower octane fuel so long as you do not knock, and almost all stock bikes are set up so conservatively that they will not knock in stock form.
Still not sure I would try it but it is an interesting theory.