Chevy Chevelle Rear Axle Dyno Results - The Great Rear Axle Comparo

Chevy Chevelle Rear Axle Swap Chevy Chevelle On The Dyno

Rear-Wheel Power Numbers
Average power is another way to look at the differences among these three rearend assemblies. As you can see from the chart, all three are very close in terms of peak and average horsepower and torque. The greatest difference is between the 12-bolt and the Ford 9-inch, with an average rear-wheel horsepower loss of 6.6 hp and 2.6 lb-ft of torque for the 9-inch. Since the average power takes into account the entire run, this represents only a 2 percent rear-wheel horsepower difference between the 12-bolt and the Ford 9-inch. The power difference isn't very much, which means it would be difficult to measure in terms of lost e.t. among these three rearends. We'd expect the difference in performance on the dragstrip between the 12-bolt and the Ford would be measured in hundredths of a second. Now you know.

HORSEPOWER AND TORQUE AT THE WHEEL
			HP	TQ	AVERAGE		HP	TQ
REAREND	PEAK HP	TQ	DIFFERENCE		HP	TQ	DIFFERENCE
12-Bolt	326	340	-	-	290.6	323.4	-	-
Dana/S60	320	339	-6	-1	286.5	322.6	-4.1	-0.8
Ford 9-inch	319	336	-7	-4	284.0	320.8	-6.6	-2.6

PARTS LIST
DESCRIPTION	PN	SOURCE	PRICE
Hotchkis adjustable upper rear arms	1203A	Summit Racing	$328.95
Hotchkis lower rear arms	1302	Summit Racing	265.95
Hotchkis trailing arm brace	1403	Summit Racing	132.95
Hotchkis trailing arm hardware	1702	Summit Racing	21.95
Denny's Drive Shaft, 1350 style	call	Denny's Drive Shaft	425.95 and up

SOURCES
AMSOIL Superior WI 7-15/-392-7101 Amsoil.com	Mikronite Technologie Eatontown NJ
Currie Enterprises 7-14/-528-6957 www.currieenterprises.com	Moser Engineering 2-60/-726-6689 moserengineering.com
Denny's Drive Shaft Kenmore NY	Strange Engineering Morton Grove IL 8-47/-663-1701 Strangeengineering.net
Hotchkis Performance 12035 Burke St., Ste. 13 Santa Fe Springs CA 90670 877-466-7655 www.hotchkis.net	Summit Racing P.O. Box 909 Akron OH 44309-0909 800-230-3030 www.summitracing.com