HP question

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07-02-2006, 05:09 PM

bvballer12

2nd Gear Member

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Join Date: Jun 2006

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Posts: 181

HP question

i am just wondering hwat the ratio is from rwhp to hp if i add 10 rwhp to my car how much engine hp am i adding

07-02-2006, 05:12 PM

randy78045

6th Gear Member

Join Date: Jan 2006

Location: Laredo, TEXAS

Posts: 6,054

RE: HP question

about 15-20%

07-02-2006, 06:04 PM

04BlueGT

5th Gear Member

Join Date: Jul 2005

Location: Georgia

Posts: 2,387

RE: HP question

Here are the general formulas. They are not perfect and no two cars are the same anyway.

Manual - subtract 15%

Auto - subtract 20%

So, my stock mustang came with 260 fwhp. 260 x .85 = 221 rwhp.

So far, I've spent about $2600 and I might have 250 rwhp. If I'm lucky.