Octane Booster

[Lebasi]

Off-Road Community,
I have a Class 12, FAT 1835 motor. I would like to pre-run with my car but I can not always find 112 octane racing fuel. I have 91-92 premium Pemex available, any octane booster recomended ?? In the long run, I may just convert the racing car to a pre-runner... Any ideas ??
Thank you.. Lebasi Racing

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[sidekicker]

here info for u http://www.lucasoil.com/ we use it for pre run and racing it give u more power in your engine our team desert assassin use it

[Dezertpilot]

I dont think u can gain 20 octane points with octane booster, sorry but ur SOL.

[TreyP]

Off-Road Community,
I have a Class 12, FAT 1835 motor. I would like to pre-run with my car but I can not always find 112 octane racing fuel. I have 91-92 premium Pemex available, any octane booster recomended ?? In the long run, I may just convert the racing car to a pre-runner... Any ideas ??
Thank you.. Lebasi Racing

What compression ratio do you have?

[nimrod]

I just got done having all my pistons replaced after trying the old Pemex with octane booster trick.....No octane booster in the world is gonna make up 20 points.......I remember when Hot Rod magazine back in the mid 90's did an article and test on octane boosters and the most expensive and advanced boosters were good for 3 points.......Most of the brands were good for less then 1 point.......

Lucas Oil octane booster works great in the DA Bikes and we love it, but I think expecting it to turn Pemex into a decent race gas is asking an awful lot..............

[dsms motorsports]

I use to run tuolene in this supercharged truck I have to stop it from pinging until I got a piggy back computer, but tuolene did work and can be found at home depot. it's about 9 dollars a gallon mix in with 5 gallons. there is an article about this that I read 1st. before trying that.

[John F2000]

The latest hot rod magazine test indicated the best was the NOS octane booster. As previously stated in the thread you wont get a large increase in octane, but they did a test with the major brands and NOS came out slightly higher than the rest.

[charlie_brown]

hey john, can you do a quick run down of 2nd and 3rd?

[redmist]

Do not ever use an octane booster on a race engine. It simply gives inconsistent final octane results. As such can cause detonation.
Why? Fuels are not refined to an exact octane. Octane boosters such as Toluene are required to boost fuels up to the pump rating. Some fuel batches require more boosters to get it to pump rating. The differing concentration of boosters means when you add the additional booster you will NOT get a consistent end octane rating. IE Higher concentration of existing octane boosters mean that when you add your booster you will NOT boost the octane rating as much as you would if you had a batch of pump fuel that had lower concentration of boosters.
The only reliable way to add boosters is to add your booster and test octane rating afterwards. Not something I can be bothered with.

[VeryFast]

The best and least expensive octane boost you can use is Toluene. As you mix a higher percentage you will notice the motor running "flat". Meaning less throttle response. I would not use Toluene in my 12 motor. Only use it in a pinch or in your prerunner. Buying the right fuel is cheap insurance for a race motor.

Do not mix more than 20% toluene. There is toluene already in all fuels. More than 20% and the motor will fall on its face.

You can get up to 5 octane points depending on what fuel you are mixing it with.

Another avenue would be to buy 116 or 118 octane and use it as a booster. 116 and 118 has up to 6 grams of TTL (Tetra Ethyl Lead) and sometimes a dose of Manganese. Mixing 116 or 118 race fuel with pump gas will give you a much higher octane increase than toluene. If your motor has an oxygen sensor, don't use this leaded fuel as it will coat the sensor and send your mapping in to full rich mode.

Don't use any "octane boosters" sold by any performance fuels. Most are toluene and cost much more than simply going to your local paint store and purchasing toluene in a gallon can.
Steve Poole