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Drive train losses

   
Old 12/10/12, 06:31 PM
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Anyone know what the drive train loss is for torque? Is it the same as for horsepower? I had my 2013 gt500 dynoed and it pulled 633 ftlbs with just a 93 octane tune. If you use the 10% loss that these 13s seem to have on horsepower, I come up with 703 ftlbs. A 70 ftlbs increase seems an awful lot for just a 93 octane tune. https://www.youtube.com/watch?v=MmZp...e_gdata_player
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Old 12/10/12, 06:53 PM
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I saw a 9% driveline loss on my '13.
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Old 12/12/12, 11:49 AM
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yes the same losses are on hp or torque. Did you have a baseline done? Ford severely underrated torque on this engine. So your torque figures sound correct.
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Old 12/14/12, 05:41 AM
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No baseline done. But it seems most baselines on a Dynojet are just below 600 on both torque and horsepower pretty consistently
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Old 12/14/12, 06:31 AM
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carbon fiber drive shaft should really cut down on the torque loss right?
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Old 12/14/12, 06:49 AM
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Originally Posted by 2012BLKV6
carbon fiber drive shaft should really cut down on the torque loss right?
Lighter, less mass.

What happened to the 15% rule of thumb? Is the 9 or 10% verified from flywheel to rear wheels?
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Old 12/14/12, 05:20 PM
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Originally Posted by cdynaco
Lighter, less mass.

What happened to the 15% rule of thumb? Is the 9 or 10% verified from flywheel to rear wheels?
IMO 15% was about right on older cars.
Newer 'Stangs no.
Even on your car and mine (5spd man.)10% is closer to the mark near as I can tell.
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