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I was wondering if it is ok to mix 110 leaded race gas with unleaded pump gas. Also how do you find out what the octane will be?
Ski-Dooin' it
Expert
the octane isnt exactly a straight average type deal, its a non linear situation, BUT, unless your really pusing it, just do an average of gallons per each type... will be plenty safe.
and yes, its plenty ok to mix 110 leaded with regular pump gas.
what kinda octane are you looking for overall??
and yes, its plenty ok to mix 110 leaded with regular pump gas.
what kinda octane are you looking for overall??

Turk
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I'm not really sure. I ran 7 lbs of boost on 93 octane last year. I'm going to 10 this year and might do 14 next. It is very addictive.
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turk.thanks. that is a slick calaulater
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Yes, very nice calculator! I haven't seen it before. Thanks!!


millstreet
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If you run an O2 sensor, you might consider unleaded race fuel. Sunoco makes a 100 and a 104, mix either with 91/93 pump gas 50/50 should be good for 11psi - 

insane
Expert
Meth baby meth! You could run 87 if you were in a jam. Fairly cheap compared to a new motor. Hurricane can give you some numbers on what boost you can run at what octane. Stuff works awesome for me. There is a Hurricane kit available in classifieds.
Qc Flatlander
Veteran
fuel mix ???
I'm expecting to run at 15 PSI this year ; I'm hesistating too .......100% VP C-12 or 50/50 Premium pump gas with a mix of VP C-16 ?
Last year I ran 12 PSI on premium pump gas (MPI Stage II at sea-level with 10:1 head shim).
I'm expecting to run at 15 PSI this year ; I'm hesistating too .......100% VP C-12 or 50/50 Premium pump gas with a mix of VP C-16 ?
Last year I ran 12 PSI on premium pump gas (MPI Stage II at sea-level with 10:1 head shim).
rxrider
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It all depends on setup, ignition, compression and boost pressure, size of compressor on your turbo and so on. If money and availability is not of your consern go with race gas 100% or 50/50 at least. Use a AFR meter no matter what, change the sensor if it goes it's on ly money.
On the other hand if money is a part of the equation go with meth/water injection as suggested above. I run stock ignition timing, 10:1 compression, 20+ lbs of boost, race IC and 2860 turbo, premium 93 pump gas and meth/water injection. I held her wide open for 1000 meters at 22 lbs without a problem, top speed was 245 kmt on the meter.
whatever you choose it will work just great, only remember to always have more octane than you need when boosted 
On the other hand if money is a part of the equation go with meth/water injection as suggested above. I run stock ignition timing, 10:1 compression, 20+ lbs of boost, race IC and 2860 turbo, premium 93 pump gas and meth/water injection. I held her wide open for 1000 meters at 22 lbs without a problem, top speed was 245 kmt on the meter.


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