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06-07-2012, 12:14 PM
Basket of Deplorables
South Bend, IN
your mom probably stayed out of boost.
You can run 87, but you will do damage when you get into boost.
There are too many factors that need to be adjusted when going from 91/93 to 87.
Fuel, timing, air... it's all too much for the ECU to compensate.
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