StreetStalkerZ

iTrader: (1)

Have any of you seen any ET difference in running some 100 or 104 unleaded race gas on a 11:1 compression motor?

I have always ran pump gas (93 octane) but never tried anything higher with the new motor. I know with higher compression it would help but im not sure about a compression ratio like mine.

JL ws-6

iTrader: (50)

Using good fuel will allow you to turn the timing up some and you might see a gain by doing that. Just adding the fuel, probably won't get you anything without adjusting the tune for it.

StreetStalkerZ

iTrader: (1)

Right but it would only benefit for the track only due to the fact that 2 to 3 gallons will run out fast so the timing will have to go back to pump gas friendly before i left the track.

TORCHD 02 TA

iTrader: (39)

it is really not that imnportant.. As long as you are running 93 octane you are good to go. All the 100 octane will do is maybe allow a little more timing and it will prevent ping and detonation too..

Save your money

gator's 99TA

iTrader: (2)

i always run more octane than i need. i dont understand guys that want to pinch a few pennys and risk their hard earned money by losing a motor.

JL ws-6

iTrader: (50)

This is sound thinking.

I run a 118 Nos fuel... not because I have to, just because I know it's safe. I'm 100% sure C16 or the like would work fine.

Next year whenI get back to racing, if Torco is out like I think they are, I'm probably going to switch to C23 if I stick with nitrous. Not becausse I have to, just because I know the fuel will give me a little added safety.

ndfrsd6

iTrader: (5)

same here .... and i totally agree , this stuff is to expensive to pinch pennys

tektrans

iTrader: (23)

race gas will kill your cats if you still have them.
race gas works well if your cr is up and it's tuned for it.
you can tune the car to race on the race gas and use pump gas on the street (I do that if I'm not racing and I'm low) BUT you cannot lay into the car on the street with the pump gas, only part throttle driving/cruising if you're tuned with race.
I can't lay into the car on the street anyway, just fryes the tires so it works for me.

cambirdracing

iTrader: (4)

A motor can only burn so much octane. If your built to run 100, 110 won't do you any good. If might actually slow you down. Only real way to find out is to purchase some and try it.

chas010

iTrader: (3)

octane = flame front velocity

tektrans

iTrader: (23)

that's nice.

BlackScreaminMachine

iTrader: (17)

Once you hit race gas be it unleaded or leaded, its a jump but the diff between brand is like said.... PENNIES!!

Cars see improvement if for an example the PCM was pulling timing and the new fuel resist it. If your not KR to begin with, will you see a measurable gain? Probably not.

BUT is it a good thing to a little heavy on fuel requirement? YES! Running cars on the ragged edge is not always the best thing.

mrdragster1970

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It's true pinching penny's can cause more damage than people realize.
It's also true throwing money away for no reason is a waste.
I've been doing this a long time with a pass or two. I try to test fuels on all new engines.
I've had engines that ran better on the cheaper stuff. So why buy the better stuff.
I had a N/A engine that ran best on 110 when everyone thought it needed more.
I've also had a N2O engine that ran better with 114, again everyone said use 118.
I run what's quickest AND still safe on parts.

Obviously you have to tune accordingly & not just pour something in and expect it to tune itself.
More so with 8-10-12+ dollars a gallon fuel, you have to be smart & safe. Just a thought, good luck everyone.

.

chas010

iTrader: (3)

Most higher octane fuels burn slower which helps prevent preignition in engines with domed pistons/irregular shaped combustion chambers without sacrificing timing. Lower octane fuels typically burn hotter and will make more hp if you can get away with it in your application. You will lose some hp running higher octane fuel than your engine requires but will decrease the chance of having major engine failure from detonation.
This is what have been told for NA applications only, NOS is a whole other ballgame.