horse power loss

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Feb 12, 2005 | 10:58 AM

1FASASZ

Thread Starter

Registered User

Joined: Mar 2003

Posts: 447

From: reno, nv

horse power loss

does anybody know the horsepower loss from a 10 bolt to a 12 bolt, and a 12 bolt to a 9''

Feb 12, 2005 | 05:15 PM

Injuneer

Administrator

Joined: Nov 1998

Posts: 71,094

From: Hell was full so they sent me to NJ

Re: horse power loss

The numbers I have seen published in National Dragster by Evan
Smith indicate:

Dana 60: 5%
GM 12-bolt: 7%
Ford 9-inch: 10%

Have never seen published numbers for the 10-bolt.

Feb 13, 2005 | 07:13 AM

87DJP2001

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Joined: Jan 2001

Posts: 1,790

From: Florida. USA

Re: horse power loss

Those above numbers plus the tranny, drive line & other losses still add up to about 15/18% for a manual and 20/24% for a auto. These are averages and NOT absolute values.