What fuel to stop detonation with high compression help please
Posted April 24, 2015 - 01:49 AM
I was hoping to run 98RON fuel.
How do i find out what fuel to run. I know if it pings to run higher octane, but how do i determine the correct fuel.
I can get higher octane but its expensive and not available at the pump.
Can i run 50/50 pump and race fuel? Can i use an octane booster? Is there any fuel i cannot run Eg. Methanol, ethanol etc.
There is a 10% ethanol mix available at some pumps thats called 100 octane.
I live in Australia so im talking RON ratings.
I want to know how to test my new engine safely to find the right fuel, and know what additives work.
Hopefully 98ron will be ok but if its not i can get up to 106ron for $$$.
Does any changes require jetting/fuel system changes.
Thanks for the help and only answer if you have credible knowledge.
Posted April 24, 2015 - 04:50 AM
Race fuel mix is the most common solution
You mix to the minimum amount of race fuel to eliminate detonation
13:5 is a substantial increase, so 50/50 should be expected
Ocatne boosters are typically just Toluene: not a very good fuel source on it's own.
For more detailed info, you should contact the Piston company
Posted April 24, 2015 - 10:40 PM
and I woundnt experiment with fuel/ combustion ratio's etc..
98 should/ could work fine,
but if not, use a booster, make sure "other" fuels dont "eat" rubber/ plastics...
Posted April 29, 2015 - 02:33 PM
98 RON should be more than enough. In fact, the originally required 95 RON should be adequate. Here in the states, gas pumps are all labeled with "AKI" ( anti-knock index), which is an average of RON and MON, and most pump premium is labeled 91-92. This is roughly equivalent to 95-96 RON, and generally works out as being enough for most people running 13.5:1 with no other additives. I wouldn't worry about it too much.