high octane fuel
- Thread starter bigwill
- Start date
it will do more harm than good unless your pushing 180+ psi of compression, or have like +6 advanced timing
hi octane fuel does nothing unless you have the compression ratio to need it.. so unless you have a modded head or advanced timing it is not needed. to tell you the truth high octane fuel is actually less effect than low octane fuel, the only need for it is to stop pre-detonation. try avgas though. its slightly higher octane but the fuel is oxygenated and burns much more fiercely than standard fuel...
i have a stock (power wise) and i was told that i shold run probust (a racing octane aditive) and advance the timing with my premix
they are a waste of money... just get the 93 octane. you will be fine with that. or like i said run some avgas and feel it come alive 
octane boosters are worthless. your better off mixing some industrial grade paint stripper with your gas, since most are like 96% or better xylene.
I run 110 race fuel in my blaster and 50/50 race/premium in my banshee. I switched to 100% race gas in my blaster(s) for a few reasons 1) it runs much cooler 2) it runs better 3) it is better quality 4) and my experience is that it tends to have less carbon buildup. this is just why I stay with this type of fuel. My blasters get good mileage so I am not put off by the additional fuel costs. You may want to search for ethanol free gas in your area and try that.
probust is the proper stuff all the guys use it for rallying
and all petrol over is 95 octane and u can get u t 100 out the pump
Over the weekend I ran a 50/50 mix of cam2 and 93. My blaster ran alittle cooler and the idle dropped alittle since the cam2 is harder to burn. I like the way my blaster ran on it so I think I'm going to stick with it, especially since I'm about to send my head to O'conner to be modded.
the octane ratings in most of Europe are just the RON rating, thats why you guys usually have at least 95 and upto 100.
here we use R+M/2 which is RON + MON divided by 2.
so our normal fuel grades are 87, 89, 91, and 93 (some sunocos have 94)
that might be why when we say 100 octane race fuel it seems strange to you
Ethanol can be used as a poor mans race fuel. Thes require a rejet and possible oil mixture change. I always run 32:1 because I'm paranoid - (i normally run yamalube 2r)
E85 - 105 Octane
E85 burns cleaner can offer more horsepower and is cheaper. Downsides are these; You need richer jets, it doesn't lubricate as well as pure gasoline, so more oil may be needed, it requires higher compression/advanced timing to see the real benefits.
Flex fuel vehicles that can run e85 are not optimized for ethanol, so they actually suffer power or gasoline.
Today, in Wichita KS, 91octane is $3.72 a gallon, ethonal is confirmed at $3.39, but internet says there is a station selling it as cheap as $2.29 here in town(im going to check this out soon).
E85 - 105 Octane
E85 burns cleaner can offer more horsepower and is cheaper. Downsides are these; You need richer jets, it doesn't lubricate as well as pure gasoline, so more oil may be needed, it requires higher compression/advanced timing to see the real benefits.
Flex fuel vehicles that can run e85 are not optimized for ethanol, so they actually suffer power or gasoline.
Today, in Wichita KS, 91octane is $3.72 a gallon, ethonal is confirmed at $3.39, but internet says there is a station selling it as cheap as $2.29 here in town(im going to check this out soon).
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