Race Gas

[pwmorris]

Have run VP Race Fuel for different applications for years.
My old 12:5-1 124", then 13:5-1 131", I would have a 55 gallon drum of C12 delivered to my house. Had my own gas pump in my garage-fill up and go. Great local distributor who would pull up and swap out the drums. Very nice.

Full race bike at 15-1, I run C25.

For my current street bike, when I take it to the track, I run U4.4, which doesn't leave a sticky residue in fuel lines and allows me to add more fuel for tuning purposes.

Daily driving around town, freeway, as a go anywhere fuel, I run typical 91 pump gas. Anything more is a waste of money. I could see carrying a small bottle of octane booster for emergencies, should someone with healthy compression get stuck somewhere with only crap fuel available.

http://www.vpracingfuels.com/motorcycle-drag-racing.html

[hardheaded]

if you don't need it , don't run it. alls the octane boost does is slow the burn rate.

[VDeuce]

Around here we only get increments of 87, 89 and 93 at the gas stations. Really wish I could get 91 here.

[Hossamania]

A real world experience: a friend of mine has a Honda VTX 1300. He was running premium fuel in it for a couple years. It always got poor gas mileage, but ran OK. He switched over to 87 octane, and his mileage increased almost five miles per gallon, from about 30 up to 35. It also started idling a little higher and had to be turned down. A little better performance, no pinging at all. In this application, it provided evidence that higher octane fuel hurt performance.

[tomcat64]

remember that AV  (100LL) and Race fuel have lead in them, and on the newer bikes that lead will raise hell with your O2 sensors. I do use AV gas for my old bikes and when I put my bikes away for the winter as it doesn't go bad..

Not necessarily true. I used to buy Sunoco unleaded race gas for my 117 that would ping in the heat of the summer. Not all race gas has lead.

I wasn't referring to race gas, I was talking about AV gas (aviation gas)

[Hossamania]

A friend of mine has an old Indian, and he has to add lead to his fuel to lube the carb and valves. AV fuel is a little to high in octane for his 7.5 to one compression... He also uses oil from the local airport used in the older planes because it has ash in it, which his loose old motor likes.

[C-Cat]

The race gas that I was questioning you all about is actually called RACE GAS. It comes in a concentrate that you can carry in your saddle and use it wherever. I have used SUNOCO racing fuel and its a tad costly at around $8.00 a gallon and the price never seems to drop as does regular pump gas. I liked the fact that there is no alcohol in it to cause issues with the carb. Well anyways I have already bought it and will give it a shot........

I've tried it on F110 Turbo sled, it will turn your plugs red, and leaves the red color (they state it doesn't hurt anything)  on engine parts also from the MMT. I had better luck with Revamp from D&D Racing, they purchase in from Shelbourne fuels in Canada. I can usually run 2-3 lbs. extra boost (25-30HP) over straight 93 octane. It will leave the red color also, as will most octane boosters I've tried.

[Phu Cat]

Smokedyvr, I'll back any amount of money your willing to bet that high octane gasoline will not produce any more horsepower than whatever you normally use.  ANY amount.  I'm that sure.  Wanna go for it?  (Don't mean to come off like a smart a$$ but I have a little first hand experience with this.)

Phu Cat

[ThumperDeuce]

If you start looking up the heat of combustion figures for octane, heptane and the different additives used to increase the octane rating you'll see that by volume there is less energy the higher the octane rating.

[N-gin]

If you don't need it don't run it. If you want the smell they sell that..
I have ;
Bubble gum
Grape,
Pina colada
Root beer, don't get the root beer 

[Phu Cat]

by volume there is less energy the higher the octane rating.

Well......not exactly.  All octane does is tell you how much the air/fuel mixture can be compressed before it spontaneously ignites.  It really has nothing to do with the level of energy contained in that volume of fuel.  Sorry.

PC

[ThumperDeuce]

by volume there is less energy the higher the octane rating.

Well......not exactly.  All octane does is tell you how much the air/fuel mixture can be compressed before it spontaneously ignites.  It really has nothing to do with the level of energy contained in that volume of fuel.  Sorry.

PC

If you look at an extreme example heptane  ( which is what the octane rating is being calculated against ie. 90 octane fuel has the same burn rates as a 90% octane and 10% heptane blend ) has a heat of combustion value of 44.566 MJ/Kg ( or 19,163 btu's/lb ); pure octane ( the 8 single bonded carbon chain ) has 44.427 MJ/Kg ( or 19,104 btu's/lb ).  An octane boosting additive like MTBE has 38.21 MJ/Kg.

So if you start with heptane as a base line you are adding in molecules with less energy in them in order to increase the octane rating and retard the burn.  So I still say that for a given volume ( or perhaps mass is more accurate ) you will have less energy available the higher you push the octane rating.

[Phu Cat]

you are adding in molecules

Therein lies the problem.  We're not talking about the same two volumes.

Please.  Look it up.  Octane will do nothing to increase power in any shape or form.  Just isn't going to happen.  Enough, I'm done

PC

[ThumperDeuce]

you are adding in molecules

Therein lies the problem.  We're not talking about the same two volumes.

Please.  Look it up.  Octane will do nothing to increase power in any shape or form.  Just isn't going to happen.  Enough, I'm done

PC

You do realize that I am saying the same thing don't you?  Increasing octane does not add energy into the reaction ie increase the power produced.

[smokedyvr]

Phu Cat I never implied that I was trying to increase hp with Race Gas. What I like is that it burns cleaner and my bike runs better on it. If I was claiming hp I wouldn't have wasted money on a 90/90 kit for my 80.

http://www.whitfieldoil.com/www/docs/171/vp-racing-fuel-/

Here's a great site to read up on such stuff!

[Garry in AZ]

Well, I'm no physicist, but I have some experience with Race Gas in my modified 2011 Corvette Grand Sport.
I did a bunch of modifications (cold air kit, long tube headers and 3" exhaust, x-pipe, cam, etc.) I use a Diablosport Trinity tuner to adjust fuel and timing curves.
We did three runs making adjustments on each. Between each run we allowed the car to cool for 30 minutes.

The second to last last run resulted in 466 hp at the rear wheels from the LS3. If you listened closely to the motor, you could hear mild detonation above 5000 rpm. The cars computer pulled some timing out and prevented damage. You could see on the curve where the timing got retarded.

Then, much to the skepticism of my dyno guy, all I did was pour in one can of Race Gas to the 16 gallons of premium fuel already in the Vettes tank.We waited 30 minutes and ran it one more time. He was so sure that the Race gas was a waste of money that he bet me a steak dinner. Well, he paid for dinner. The Race Gas run resulted in 473 hp and the detonation was gone, the car did not pull timing out. EGT's were also a little lower.

So, my experience says it does work, but unless you are running hard enough, there wouldn't be much (if any) benefit. But if you are racing or running a high compression motor on what passes for gasoline these days, the stuff really does work. Where it really shines though, is for a race team that normally carries a couple of 55 gallon drums of race fuel all over the country. With the Race Gas, you can just by premium at the event, and pour in the additive. Maybe cheaper, but definitely easier, and safer too.

Garry