Race fuel

[iclrag]

So today i ran out of gas, no problem right? i'll just switch to reserve! well after switching to reserve i drive about another 1/8 of a mile and it dies again, great, i'm out of gas on the side of the highway! so i start pushing and out of no-where i this guy comes running and takes me to his shop where he has race fuel (he also had some friggin amazing cars in there!!!) and we work our way back to the highway (Where my bike is sitting) and he proceeds to ask what type of gas i use, so i tell him "i'll use anything to get me to the next gas station" so he asks if i use race fuel, now i've never thought about putting it in my street bike but he seemed determined to put this fuel in my bike and i wasn't about to say no when i'm miles from the next gas station, he then proceeds to fill my tank (to the top!) with this gas and with a shaZam! eating grin explains how amazingly my bike is going to run until my next fill-up, so with a promise to come back some day and buy something from his shop i'm off, and holy @#$%!!!!!!! once i get going i can literally hear the difference, my engine sounds to be running smoother, my acceleration feels increased and i'm cruising at a hgher speed with much lower RPM's


so for those of you who dont want to read the whole story;
ever tried race fuel? i think he said it was 110 something or other, but wow this runs amazingly in my bike! if it isnt running lean (i'll check that later since i think it burns hotter) i may well mix some into my tank on occasion, right now i'm at 50/50 primo and race fuel (i ran about half a tank of it, even my friend (who likes riding with me) could tell the difference).

[Ryanstalin]

i wonder if I can get some race fuel from my local drag strip, they have it i believe, if not rynolds has it. i wonder if those octane boosters work.

[iclrag]

Check your local high performance shop, the 110 high octane gas is like running your'e bike off cocaine!

[BassWoW]

True- Even tho I dont use race fuel- If I put the lowest reg unlead I think 87 and switch to 93 or 91- I deffinatly notice a difference-

I'm going to try some of this liquid cocaine sometime too!

[dry_humor]

i think 87 is the recommended octane in the manual and everything. higher octane fuel is made for high end engines with higher compression ratings like mercedes, bmw, race cars and such. as far as i know, the gs's motor is not on par with anything of that sort.

[Higgins13]

Will this type of fuel not clog your whole fuel system up?

[weedahoe]

Higher octane fuel is susceptible to less detonation

[twocool]

Ha ha ha ha ha ha....

Cookie

So today i ran out of gas, no problem right? i'll just switch to reserve! well after switching to reserve i drive about another 1/8 of a mile and it dies again, great, i'm out of gas on the side of the highway! so i start pushing and out of no-where i this guy comes running and takes me to his shop where he has race fuel (he also had some friggin amazing cars in there!!!) and we work our way back to the highway (Where my bike is sitting) and he proceeds to ask what type of gas i use, so i tell him "i'll use anything to get me to the next gas station" so he asks if i use race fuel, now i've never thought about putting it in my street bike but he seemed determined to put this fuel in my bike and i wasn't about to say no when i'm miles from the next gas station, he then proceeds to fill my tank (to the top!) with this gas and with a shaZam! eating grin explains how amazingly my bike is going to run until my next fill-up, so with a promise to come back some day and buy something from his shop i'm off, and holy @#$%!!!!!!! once i get going i can literally hear the difference, my engine sounds to be running smoother, my acceleration feels increased and i'm cruising at a hgher speed with much lower RPM's


so for those of you who dont want to read the whole story;
ever tried race fuel? i think he said it was 110 something or other, but wow this runs amazingly in my bike! if it isnt running lean (i'll check that later since i think it burns hotter) i may well mix some into my tank on occasion, right now i'm at 50/50 primo and race fuel (i ran about half a tank of it, even my friend (who likes riding with me) could tell the difference).

[burning1]

Higher octane fuel is susceptible to less detonation

Detonation isn't really an issue for the GS500. Stock engine will run race pace all day on 87.

Will this type of fuel not clog your whole fuel system up?

Depends on the fuel, but for the most part the race gas you get out of a pump is just old-school leaded gas. Probably fine for the GS500E. If you have a GS500F with a catalytic converter, it's best to avoid it; lead will ruin the catalyst.

[iclrag]

So back in the olden days, 110 octane was normal, now-a-days 92 is considered "premium" with 85 being regular (around where i live) so in a way the 110 is what the old E motors were designed to run, i technically have an F model, but i don't think i'll be running the 110 again anytime soon. This is probably one of those "well, it was fun while it lasted" kind of things

[slipperymongoose]

I remember the ole days of a tank of av gas and a shot of reddex for a good time. To take real advantage of high octane fuel you need to dial in your timing. But hey I wouldn't turn down a tank of race fuel even though its illegal to use on Aussie public roads.

[SAFE-T]

Race gas is around $20/gallon here, so no.

[Funderb]

Ima go fill up with some 100LL at the airport and see what happens.
Other than pumping some lead into the atmosphere.


I imagine the placebo effect will kick into high gear.

[Suzuki Stevo]

So back in the olden days, 110 octane was normal, now-a-days 92 is considered "premium" with 85 being regular

I started driving in the early 70's and the highest octane gas I ever saw in Washington State (at a gas station chain) was Chevron's Custom Supreme 104 octane , where was 110 octane normal??

[burning1]

Sears Point, Thunderhill, Laguna Seca, Buttonwillow...

I think I can get up to 118 or so.

Race fuel comes in a wide variaty of flavors. I think most of the stuff at the pump either uses lead or an exotic mix of additives to bring the octane rating up. Wouldn't be surprised if it's ethanol free. The really exotic stuff is highly corrosive, and heavily oxygenated. It'll run very lean with stock fueling, but make more power than pump gas when properly tuned. It also has a higher octane rating, permitting higher compression/more boost/more aggressive timing.

[RichDesmond]

Oi vey, we need a few facts here.

First, the old octane numbers you saw in the 60's was RON, not the (RON+MON)/2 that you see today. That 104 is about 99 in the current system.
Second, modern engines have much more efficient combustion chamber designs and so don't need the high octane levels of the past.
Third, and most important, OCTANE DOES NOT EQUAL POWER!! All octane is is a measure on knock inhibition. Nothing to do with power or energy density at all. In fact, all other things being equal the higher octane gas makes slightly less power. What is does do is allow you to use higher compression ratios and more advance. Those are what generate the power, not the octane. If you just dump higher octane gas into a motor but leave everything else the same, you make the same power.

Race gas comes in a lot of varieties. Most are just standard gas, blended with an eye to storage stability and with a high octane rating. These types will not make any more power unless you mod the engine.
The other main group are the oxygenated types. These can make more power, if you adjust the fuel mixture to suit them. They actually have a lower energy density than normal race gas, but because they carry some of their own oxygen with them you can (must, actually) run a richer mixture and so end up stuffing more energy into the combustion chamber per intake stroke.

[slipperymongoose]

How are you meaning that modern engines don't need higher octane? Modern cars and bikes now need 95ron minimum like on my Beemer. Are you meaning that they need high octane but not the high stuff hat you used to get?

[RichDesmond]

How are you meaning that modern engines don't need higher octane? Modern cars and bikes now need 95ron minimum like on my Beemer. Are you meaning that they need high octane but not the high stuff hat you used to get?

Compared to years ago, compression ratios are much higher now, even though most gas is lower octane. 95 RON is premium gas now, but that's lower than "premium" used to be.

[slipperymongoose]

Ah k got ya, oh btw are you going to do springs for the BMW f800r?

[Funderb]

guys, we all know if you want to get real power out of these things, you need to fill it with diesel.