horsepower

brad03svt · April 22nd, 2007, 11:08 AM

I have looked online for a way to calculate your power to see the difference from the rear wheels to the engine. I thought that it was 20% but I'm not sure. All of the ones online you had to have the 1/4 mile time and car weight. Does anyone know how to calculate this without that info, just the HP and FT-Lbs?

HMUSN · April 22nd, 2007, 11:23 AM

the general rule of thumb is you lose 15% if you drive a stick and 20% if you drive an auto..

so if your car is stock

390 X .15 =58.5

then 390 -58.5= 331.5rwhp stock....

mind you this is inaccurate because your Cobra is underated in power.
same math applies to the TQ numbers.

i also looked online and didn't see the caculator man..

brad03svt · April 22nd, 2007, 11:46 AM

Thanks alot, now I can find out what I am making with my new parts.

April 22nd, 2007, 11:08 AM	#1
brad03svt Newbie Join Date: Feb 2007 Location: San Antonio Posts: 42 iTrader: 0 reviews	horsepower I have looked online for a way to calculate your power to see the difference from the rear wheels to the engine. I thought that it was 20% but I'm not sure. All of the ones online you had to have the 1/4 mile time and car weight. Does anyone know how to calculate this without that info, just the HP and FT-Lbs? __________________ JLT CAI Magnaflow Catback X-pipe 2.8 Pulley 4.10's

April 22nd, 2007, 11:23 AM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	the general rule of thumb is you lose 15% if you drive a stick and 20% if you drive an auto.. so if your car is stock 390 X .15 =58.5 then 390 -58.5= 331.5rwhp stock.... mind you this is inaccurate because your Cobra is underated in power. same math applies to the TQ numbers. i also looked online and didn't see the caculator man.. __________________

April 22nd, 2007, 11:46 AM	#3
brad03svt Newbie Join Date: Feb 2007 Location: San Antonio Posts: 42 iTrader: 0 reviews	Thanks alot, now I can find out what I am making with my new parts. __________________ JLT CAI Magnaflow Catback X-pipe 2.8 Pulley 4.10's

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