Drivetrain loss
Thread Starter
5th Gear Member
Joined: Jul 2007
Posts: 4,897
From: TX
Drivetrain loss
What percentage drivetrain loss is there on a dyno? Say I'm putting down 337whp on a mustang dyno with 20'' rims/tires, lightweight aluminum driveshaft, 4.10 gears, TR3650 trans, etc.
Do the 20'' wheels come into play? How about the lighter weight driveshaft? Gearing? I've heard the heavier wheels/tires can kill 8-10whp. Trying to get a somewhat accurate bhp number and wondering what factors come into play when calculating drivetrain loss...
Do the 20'' wheels come into play? How about the lighter weight driveshaft? Gearing? I've heard the heavier wheels/tires can kill 8-10whp. Trying to get a somewhat accurate bhp number and wondering what factors come into play when calculating drivetrain loss...
6th Gear Member
Joined: Jun 2007
Posts: 16,182
From: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
The difference between the crank and the RW's is a conglomeration of losses totaling roughly 12-15% of the crank value. We know we can shave a little here and there but I haven't seen numbers for various individual changes between the crank and the wheels.
2nd Gear Member
Joined: Jan 2007
Posts: 403
From: Plant City FL
What percentage drivetrain loss is there on a dyno? Say I'm putting down 337whp on a mustang dyno with 20'' rims/tires, lightweight aluminum driveshaft, 4.10 gears, TR3650 trans, etc.
Do the 20'' wheels come into play? How about the lighter weight driveshaft? Gearing? I've heard the heavier wheels/tires can kill 8-10whp. Trying to get a somewhat accurate bhp number and wondering what factors come into play when calculating drivetrain loss...
Do the 20'' wheels come into play? How about the lighter weight driveshaft? Gearing? I've heard the heavier wheels/tires can kill 8-10whp. Trying to get a somewhat accurate bhp number and wondering what factors come into play when calculating drivetrain loss...
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