how much hp does it take to go 121 mph in a 3000lb mustang??? And what would be the difference in flywheel hp compared to RWHP, and how is it figured?
Jack
Jack
how much HP does it take to go 121 mph?
- Thread starter jackchan
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onefstsnake
New Member
well a friend of mine went 10.22 @ 134mph with ~600RWHP
His car weighed in at ~3700lbs with the driver.
Flywheel hp compared to RWHP varies with transmissions.
His C6 tranny probably eats almost 100hp
His car weighed in at ~3700lbs with the driver.
Flywheel hp compared to RWHP varies with transmissions.
His C6 tranny probably eats almost 100hp
According to this calculator: http://bbs.hardcore50.com/calc/?mode=hpfrompw it would take 410 "engine HP" which I suppose is flywheel.
Euphoric306
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- Apr 5, 2004
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Euphoric306 said:i thought u meant like on the highway .....
Well, if you can't do that stock then there is a problem.
I came up with 407 hp....but I was quickly told I had no clue what hp it took to run that speed! driveline loss is between 10-15% depending on factors (type of car, type of driveline etc. I.E. if its race driveline it should loose 10% rather than 15%).
anywhich way you do it 410 or 407 hp minus the driveline numbers comes up to be around 355-360RWHP....would you agree? thats using 12 percent driveline loss.
Thats a hel ova lot of hp from a stock 4V cobra with stock unported heads, stock cams....and full exhaust thru shortie headers ....wouldn't ya think?
Jack
anywhich way you do it 410 or 407 hp minus the driveline numbers comes up to be around 355-360RWHP....would you agree? thats using 12 percent driveline loss.
Thats a hel ova lot of hp from a stock 4V cobra with stock unported heads, stock cams....and full exhaust thru shortie headers ....wouldn't ya think?
Jack
ninety15.0
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- Mar 10, 2004
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ninety15.0
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Im assuming your talkin bout a supercharged cobra, and no thats not uncommon at all. Thoe motors are underrated at 390 hp and they have very efficient drivetrains...compared to a 5.0. I've seen 03's throw down 360rwhp with just a catback. very impressive numbers in stock form.
NO.........I am talking about Naturally aspirated Cobra!!! So is that a lot of NA horsepower for a stock cammed,stock unported intake, stocked unported headed cobra
Jack
Jack
ninety15.0
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yup, then i would agree....that does seem like way too much, i thought those motors were only rated at 320 hp.
well I didn't mention, this particular combo isn't totally stock! It prolly has lightweight internals in the bottem end, shaved heads, good valve job and no telling what kinda light components internally in engine, trans, and rear end. but still....thats hauling tail!
