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Old 04-06-2012, 05:53 AM   #1
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Racing Fuel

Has anyone tried racing fuel in a stock car? They say with the TiVCT it can make the adjustment for more octane.
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Old 04-06-2012, 08:57 AM   #2
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Waste of money on a stock car.
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Old 04-06-2012, 09:05 AM   #3
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I read that for optimal performance you want to run the lowest octane possible, like if you car is tuned for 91 run 91, anything higher wont do a thing
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Old 04-06-2012, 09:10 AM   #4
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You should run the lowest octane that your motor needs. Even a highly modified motor will run fine on premium pump gas. Running race fuel really requires extensive modifications to be useful.
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Old 04-06-2012, 10:06 AM   #5
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I don't the the stock ecu will take advantage of anything over 91 octane. Thank The People's Republic of Kalifornia for that one.
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Old 04-06-2012, 10:12 AM   #6
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These cars adjust depending on fuel used. 93 being Max fuel. You can put race fuel in it. Say 110 octane but it isn't going to do much if nit hurt it. The computer can only adjust +/- 3 degrees of timing. So it not going to do nothing really on a stock car. They have showed these cars made more power on 93 over 87. And it is very common for them to dyno base on 87. Then tune on 93 and dyno to show bigger gains.

On a FI car putting a little race fuel in with your 93 can make a big difference. That 3* of adding timing can be 40whp.
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