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03-21-2007, 07:49 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,303
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Not Ranked
Power to weight formula ?
Do any of you have the power to weight formula ?
My cobra engine put's out 563 hp. Weight of the car is 2,400 lbs.
Thanks,
__________________
Regards,
Kevin
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03-21-2007, 08:13 PM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
4.26
Weight divided by power.
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03-21-2007, 08:18 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,303
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Not Ranked
well.........that's simple !
Thank you
__________________
Regards,
Kevin
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03-22-2007, 04:27 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,554
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Not Ranked
Frenchy is a simple Frog and she told Fred.
Ron  |
03-22-2007, 04:57 AM
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Beam Me Up Scottie
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Join Date: Aug 2004
Location: Squantum (part of Quincy),
MA
Cobra Make, Engine: SPF1049 Titanium w/black stripes, 351W with Trick Flow Heads, Tremec 3550
Posts: 7,592
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Not Ranked
The only dividing that Frenchy can do is both her legs. Good eatin' 
In the good old days of "muscle cars", any power to weight ratio less than 10 was FAST. If you got down to a ratio of 7, you were a king of the hill.
HP was always engine HP, and I'm assuming your 563 HP is engine HP, not RWHP.
__________________
Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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05-09-2007, 01:38 PM
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CC Member
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Join Date: Feb 2006
Location: Scottsdale,
AZ
Cobra Make, Engine: Superformance, Roush 427R-095, Pro Systems carb, 2" headers, Buckshot Racefab side pipes, 10s off idle start
Posts: 705
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Not Ranked
I would think it would be of most meaning if usable HP with a driver was used for a HP to weight ratio.
Get a 1/4 mile trap speed, correct to sea level for alike comparison to others and then use a racing calculator for a HP number. Divide HP into you and the car weight.
If car and driver is 2600 lbs and it traps 125 mph, which is about what 550 to 600 engine HP Cobras often seem to be, it would be about a 400 corrected rear wheel HP car.
6.5 lbs per 1 HP.
http://www.pro-system.com/calc.html
http://www.modulardepot.com/density.php |
05-09-2007, 01:44 PM
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CC Member
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Join Date: May 2000
Location: Northern VA,
VA
Cobra Make, Engine: Classic Roadsters
Posts: 2,765
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Not Ranked
Don't forget to factor in what day of the week you are running the formula, and also if you are above or below the equator for proper coriolis adjustments!!!!!!!
What would you guys do without me !!! ???? 
.
__________________
LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
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Utinam logica falsa tuam philosophiam totam suffodiant!
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05-09-2007, 01:55 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Well, since everyone says TORQUE is what makes it feel good, what is the torque to weight formula? Let's see, weight divided by torque for my car (2650 lbs and 450 ft-lbs) works out to 5.89 per ft...what's a "per ft"?
__________________
Ken
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05-09-2007, 02:22 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,303
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Not Ranked
Good question Ken !
How about 2400 lbs and 580 torque ?
__________________
Regards,
Kevin
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