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Old 09-15-2012, 09:29 AM   #15
lscrx
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Quote:
Originally Posted by swansong View Post
Right, we can't know exactly how these real world numbers compare to the crank numbers, because of the uncertainty in drivetrain losses. Dyno accuracy and peculiarities are mitigated by the sampling of many different dyno's and averaging the results out. Of course we only have a small sample to deal with, but it's a start. So, even if we assume a 10% loss, the numbers still look good:

Average HP: 227.04 x 1.11 = 252.27 HP
Average TQ: 276.316 x 1.11 = 307.02 ft/lbs

It certainly seems as though the torque number is being underrated. By quite a bit.

(Aside: hopefully we all realize why I'm multiplying the whp/wtq by 1.11 instead of 1.10 for a 10% loss, and 1.18 instead of 1.15 for a 15% loss. Can explain if necessary.)
The non-ST's are making almost as much torque to the wheels as Ford rates them at the crank. IIRC the stock torque rating is 146, and people (with the 5 speed) are dyno'ing at 140+ to the wheels.

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