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Old 10-22-2019, 06:55 PM   #16
stevieturbo
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

Quote:
Originally Posted by Taff View Post
Says who? The WRC F1A fuel -100octane max I believe? - IS made with extra Toluene added, I know because I used to buy my Toluene from a company who made the fuel.
I would have thought WRC and any such motorsport would have very tight rules these days about the fuel used, and wouldnt allow random adding and mixing of chemicals to the fuel.

I have used toluene in the past and found it very dirty. It would tend to produce black smoke, even when only say 10% was used, and also the engine oil would end up stinking of the stuff too.
One car we did use a pretty high percentage of the stuff along with methanol and petrol too. But now moving onto factory supplied fuels...there is no question it runs better and cleaner. Sadly a lot more expensive though.

But those things put me off it altogether.

Now maybe there are different types of "toluene", but this one was bought as like 99.xxx% toluene off a seller on ebay.
It was actually ridiculously cheap at the time and he even did free postage here, which was amazing lol.
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Old 10-23-2019, 09:14 AM   #17
Taff
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

Yeah, a US gallon of C12 or C16 is around 20 at the track, an equivalent 20% Toluene mix is about 7 a UK gallon.
You can lean the AFR a bit because of the increased btu content of Toluene (we use the usual 11.5 ish), it also likes a fair bit of heat to burn cleanly and a bit more timing advance- it is very good in non intercooled combos. F1 back in the '80's used to duct hot air from the exhaust to the fuel tanks to warm the fuel to help it vapourise more easily.
We've not noticed any oil contamination using 20-50 Valvo VR1, (I don't know what you set your ring gaps to), and I've used it in high compression n/a, blown, turbo and 2 st/4st dirt bike combos over the past 20 years or so.
ps, a mixed batch of gas/Toluene doesn't like to sit for weeks in a vented fuel tank, we mix a fresh batch for each meeting and use the old in our lawnmowers.
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