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Old 10-02-2019, 06:48 PM   #1
Mgabski
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Default Looking to mix fuels for the track. Pump gas and taking recommendations

I currently have my car running on 93 octane. Itís a blow through turbo deal non intercooled. Looking to add a few gallons of something for protection down the track. There are so many fuels out there that I donít know what I can get away with. I was considering just switching car over to e85 but Itís not available a lot around here and the car sees a good amount of street use.

How do I go about choosing which fuel to use? Itís a fuel injected motor.

Thanks guys.
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Old 10-07-2019, 06:53 PM   #2
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

how much do you want to spend, what fuels/compounds do you have easy access to ?

And are you looking for something that will require no tuning changes ?
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Old 10-08-2019, 01:11 AM   #3
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

If you have an airport close, you may be able to get 100LL AV gas. It is 100 octane and cost about $4.00/ Gal. I have used it straight in my pump gas 582 BBC for years with no side effects.
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Old 10-08-2019, 05:26 PM   #4
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

If you can run on the street with 93 you could probably get away with octane boosters for the runs.
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Old 10-11-2019, 05:38 AM   #5
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

There is nothing better than Toluene, easily available and cheap too. Add 10% for medium boost, so that's 9 gallons of pump fuel and 1 gallon of Toluene. I've used it for nearly 20 years without a problem. It is fantastic stuff.
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Old 10-13-2019, 03:46 AM   #6
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

I find this chart to be fairly useful. Cost wise, I'm convinced that you ought to be buying the very highest octane fuel you can easily acquire, if you are going to mix it with pump gas.



http://www.wallaceracing.com/octane-chart.php


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Old 10-13-2019, 06:36 AM   #7
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

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I find this chart to be fairly useful. Cost wise, I'm convinced that you ought to be buying the very highest octane fuel you can easily acquire, if you are going to mix it with pump gas.



http://www.wallaceracing.com/octane-chart.php


Take care. Tom Worthington
But there are many who will say, not all fuels readily mix properly with pump fuels for such use.

Really, the simplest and safest for occasional use, and you know will not require any major tuning changes or concerns is a simple octane booster.
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Old 10-17-2019, 10:49 AM   #8
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

Oh man I stopped checking this thread thinking it was a goner. Haha. So I am mainly just looking for added protection against detonation Incase intake air temps get crazy. Honestly, for the little bit I run, I don’t mind spending some money on fuel for the piece of mind that I will not grenade my motor.

Since posting this I ordered a Holley efi port injection set up, and plan to switch to full time e85 and adding a second meth nozzle. Once I get my new intake manifold and see what kind of room I have to work with I may end up going intercooled too depending on how far off my existing stuff is to fitting.

I wasn’t looking to add fuel for more power. So didnt plan on changing the tuning at all. My concern was I know certain fuels require a lot more quantity to run correctly. So I didn’t want to add a fuel to help against detonation and end up leaning it out.

I will look into octane boosters. To be honest I didn’t expect them to be recommended by anyone, didn’t know if they were snake oil or could add protection.
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Old 10-20-2019, 02:53 AM   #9
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

Octane booster needs to say "Contains MMT" on the label. MMT is the active ingredient. Toluene is high octane but it attacks most rubber and plastic parts and will make them soften and swell. Don't use MMT with alcohols, methanol or ethanol or any other oxygenate.

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Old 10-20-2019, 05:59 PM   #10
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

Toluene doesn't attack most rubbers and plastic parts and it doesn't make them soften or swell either (at least not up to 20% levels,which is basically C16) -in fact all pump gas has Toluene in it. Toluene is a bit more than just an octane booster, it also has more BTU's per pound of fuel than most other additives-more BTU's equals more power. With their huge budgets that meant they could have used any chemical - F1 and Group B cars used it- what does that tell you?
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Old 10-20-2019, 06:26 PM   #11
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

But none do anymore.....
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Old 10-20-2019, 11:43 PM   #12
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

A buddy with a truck, used 55 gallon drum, a hand crank pump. Yea way too hard to use E85
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Old 10-21-2019, 03:36 PM   #13
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If it's good on 93, why not run meth injection with a boost sensor.
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Old 10-21-2019, 03:38 PM   #14
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

Either do a meth injection or get a drum of VP ms100 it's 100 octane unleaded. A lot of fuels will not mix properly.
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Old 10-22-2019, 07:52 AM   #15
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Default Re: Looking to mix fuels for the track. Pump gas and taking recommendations

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But none do anymore.....
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.
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