marshall13
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the first step is to admit your ignorance
Posts: 301
Fort Lauderdale FL
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it passes air more efficiently for the engine, thus using a little more... so, rejetting, and possibly a MINOR loss in mileage... i doubt the difference will make any change in your fueling habits, unless you have a "run from full to reserve" daily 1 way commute.... now, throw the second grind one in, add an open pipe exhaust, and say an edelbrock 38mm, with an efficient air filter(or a velocity stack), and your mileage will drop noticably... anything that makes the engine breath more air, will require you to burn more fuel per gulp.... though one can mitigate that to an extent with final drive gearing(more torque available at cruise speed, you can lower the drive ratio, thus lowering revs, and air/fuel usage)... it's a package deal, aint no free rides...lol
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