Make your own race gas.

[James Earl]

I stole this from another site. I will set up the meteric conversoin soon but I this give ratios in % and math is easy.

(Toulene octane)(# of gallons)+(pump gas octane)(# of gallons), then divide by total number of gallons, in which case is 18.5 gallons for the Mkiii, so five gallons of toulene mixed with 93 will equal about a 99.3 octane rating. (Or, 1.2 gallons of toulene + 2.8 gallons of 93 will equal about 99.3 octane, and is 30% toulene.)

Toulene has RON+MON/2 of 118, so when you average it out with pump gas, this is how you obtain the final octane rating.

Pump gas has 9% toulene by volume, and 8% xylene. Race gas has 27% toulene and 1% xylene.

Pump93/Toulene ratio----Gallons----------Octane
95%/5%------------------17.575/0.925-----94.05
90%/10%-----------------16.65/1.85-------95.10
85%/15%-----------------15.725/2.775-----96.15
80%/20%-----------------14.8/3.7---------97.20
75%/25%-----------------13.875/4.625-----98.25
70%/30%-----------------12.95/5.55-------99.30

It's dangerous to your fuel system to use more than a 30% toulene mix. Why? I forgot... lol, sue me. Just dont do it!

Make sure to add lubricant when using toulene. Marvel mystery oil comes into play here.

55 gallon drums of toulene, can be had for $246+ shipping from "Star Bronze Company Inc." ...last I knew. Or, can be bought at your local paint store, but make sure they have "pure" toulene, not paint thinner.

[dogstar]

not to rain on your parade, but i recently read an excellent article in sport compact car or grassroots...basically, they took all kinda octane boosters and some toulene to an independant lab and had them tested.

the NOS offroad/racing formula was 85% as effective as the strongest mix of toulene, but instead of messing around putting 5 gallons of toulene into your tank, it was a 9 oz can.
now... this isnt a problem if you want to mix at home, or if you can find a gas station willing to allow you to do it on their property, but i havent found any yet.

on another note, isnt toulene highly toxic, and a listed carcinogen?
not exactly something id want to have 5 gallons of sitting in my trunk on the way to the drags ;)

ill try to find the article to get more concrete numbers if anyone is interested.

[Deep_Blue]

It was in SCC, June 2005 issue (?). And I was thinking the same thing reading this. I wouldn't use toulene necessarily, besides, pump gas works for me! I guess you could do it if you wanted to take the time/money.

Cheers,

Tim

[James Earl]

OK how about this.... http://www.elektro.com/~audi/toluene/

OK so the thinking is you start with 94 Oct ans add a little T to get the high end boost working better.