horspower lose from engine to rear wheels question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

billyspeed · 06-28-2010, 08:50 PM

does anybody have a real way to figure out the hp lose from engine to the rear wheels. my dyno run said 377 to rear wheels.

ive heard every rumor number from 10% to 17%...
is there any way to figure this out in my 1ss MANUAL with an actual formula or anybody have real data on this instead of " my friend said E=MC SQUARED TO THE FLUX CAPACITOR" ect ect ect

thansk for any help

69lt1bird · 06-29-2010, 06:01 AM

10-15% for a manual and 15-18% for an auto is pretty common.

SAE certified horsepower is 426 crank horsepower so that puts you in the 11-12% loss range. Pretty much on the money.

Russell James · 06-29-2010, 08:09 AM

377 x 100 / 85 = 444 for using roughly 15%

377 x 100 / 88 = 428 for using roughly 12%

Thats the formula for figuring somewhere around 12 to 15 % loss. The only way to know the exact number would be to dyno the engine out of the car.

DSteck · 06-29-2010, 08:52 AM

If you wanted to get exact, it's a combination of a percentage and a fixed value...

12% is usually a decent estimate of drivetrain loss.

06-28-2010, 08:50 PM	#1
billyspeed BILLYSPEED Drives: 2016 black camaro SS Join Date: May 2009 Location: Williamstown N.J. Posts: 640	horspower lose from engine to rear wheels question does anybody have a real way to figure out the hp lose from engine to the rear wheels. my dyno run said 377 to rear wheels. ive heard every rumor number from 10% to 17%... is there any way to figure this out in my 1ss MANUAL with an actual formula or anybody have real data on this instead of " my friend said E=MC SQUARED TO THE FLUX CAPACITOR" ect ect ect thansk for any help Last edited by billyspeed; 06-28-2010 at 09:16 PM.

06-29-2010, 06:01 AM	#2
69lt1bird Drives: 1969 Pontiac Firebid Join Date: Aug 2009 Location: Lapeer, MI Posts: 89	10-15% for a manual and 15-18% for an auto is pretty common. SAE certified horsepower is 426 crank horsepower so that puts you in the 11-12% loss range. Pretty much on the money. __________________ Free HP Tuners Beginners Tuning Guide Michigan Snowmobiler 1969 Firebird: 7.55@97.93 1/8 1.70 60 ft.[/COLOR] EPS cam 234/246 .602.606 114+3, 6.0 LQ4, L92 heads milled 10.5:1, Ported L76 intake, ported 90mm Holley TB, 100mm MAF, FIC Custom injectors, Hooker LT, PYPES dual exhaust with an X pipe, 4L65e with all of the good parts inside, FTI 4000 RPM Stall, 12 bolt with 3.73 gears. HP Tuner tuned by me

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06-29-2010, 08:09 AM	#3
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,483	377 x 100 / 85 = 444 for using roughly 15% 377 x 100 / 88 = 428 for using roughly 12% Thats the formula for figuring somewhere around 12 to 15 % loss. The only way to know the exact number would be to dyno the engine out of the car.

06-29-2010, 08:52 AM	#4
DSteck Account Suspended Drives: 2006 Corvette Z06 Join Date: Feb 2010 Location: St. Louis, MO Posts: 587	If you wanted to get exact, it's a combination of a percentage and a fixed value... 12% is usually a decent estimate of drivetrain loss.