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Old 11-04-2015, 09:20 PM   #1
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water injection

anyone know how much hp a water injection gives to a car?
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Old 11-05-2015, 07:15 AM   #2
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water injection gives negative horsepower. Alcohol injection, or water / methanol injection can give some power, but really its only beneficial in boosted applications.

The water acts as a chemical intercoolant because it absorbs nearly double the heat methanol does before evaporating. You only want enough water to disperse the heat though, any additional water displaces either fuel or oxygen in the combustion chamber and therefore impacts horsepower.

Methanol has an octane of about 110 and, is an oxygenated fuel, so it can be tuned to give more power but again its really not beneficial unless you are boosted. If you want a bump above pump gas just use E85.

Assuming you are boosted however, WMI is a tremendous benefit and can help the car run significantly better over all and i would highly recommend running it.
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Old 11-05-2015, 03:06 PM   #3
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Originally Posted by Voltwings View Post
water injection gives negative horsepower. Alcohol injection, or water / methanol injection can give some power, but really its only beneficial in boosted applications.

The water acts as a chemical intercoolant because it absorbs nearly double the heat methanol does before evaporating. You only want enough water to disperse the heat though, any additional water displaces either fuel or oxygen in the combustion chamber and therefore impacts horsepower.

Methanol has an octane of about 110 and, is an oxygenated fuel, so it can be tuned to give more power but again its really not beneficial unless you are boosted. If you want a bump above pump gas just use E85.

Assuming you are boosted however, WMI is a tremendous benefit and can help the car run significantly better over all and i would highly recommend running it.
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Old 11-05-2015, 03:45 PM   #4
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So is that a Yes or No?

The OP's question wasn't really a yes or no question. It was a "how much". And volt pretty much nailed the answer. As usual.
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Old 11-06-2015, 12:09 PM   #5
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Methanol gives about 30-90 hp if done right....
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