you have to really work at making it hammer. 93 still looks like an oil slick minutes later. It's better to buy-mix on the side of caution than burn it up.Ī little overkill :) But you can throw a small cup of this on the concrete, a few seconds later you cant tell where it was. And unless you buy in bulk from a known supply or own a test kit. Īnd has a higher flash point than lower octane Some higher octane burn slow like Avgas, I would be asking my fuel supplier. Hope this wasn’t to much don’t ask for math formulas I done forgot them just imagine pascals laws, and geometry.Įdit : another discussion is rpm and timing. So yes higher compression requires less advance. Or richen up.Įach fuel and motor combo has a different max advance and any change in fuel would cause knock, as will air temp and current motor conditions. I.e sometimes people get a knock at 3/4 throttle need to retard max timing. 25* full throttle timing has a max typically close to 30* in the motors richest state. When setting final advance ( not max) you will typically be leaner then at other points prior to full throttle. Without impending the up stroke, or generating knock ( the forcing backward of piston travel). Confused yet?įaster consumption requires less advance for peak pressure to accour at the right point of piston travel creating maximum down piston acceleration. It is a faster burn as burn rate is simply a defined rate of burn for chemical description. Higher compression benifits in creating a higher consumption rate easily confused with faster burn. 100ll both have 100aki but not the same burn rate due to 100ll being a mix of octane, tel, and cheeper versions of 100ll other things like detergent and stuff. The burn rate rate of the fuel isn’t dependent on aki, it depends on the additives in addition to the main component ( the chemical octane). Some can alter hot spot and force retarding due to heat.īeen thinking for a while how to add some engineering knowledge without just adding confusion. Just how the force is applied same with angle. Squish height won’t change the cc of the head.
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