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The Marketplace Categories New

Buy and Sell Cars, Parts, Services and more. Ranging from New to Used to Aftermarket products for free. Car and Parts Dealers are now welcomed.
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Cars For Sale

Exterior & Body

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Dear Friends,

We all love our cars & like to improve our rides (if u're not, u won't come to ZTH, right?) :biggrin:

I would like to know how do u measure improvement of torque & hp without putting ur car to a dyno machine..?

Especially after u bolt on some simple performance part..

Let me share how i do it 1st.. i'm not a pro.. so, my method is not exactly correct..


IDLE SPEED
the 1st thing i would do is take note what rpm my engine idle before and after i bolt on the...
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