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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

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Old Oct 7, 2019 | 09:40 AM
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Decode Help Please

The fordification site says the "D" engine code is rated at 208 HP at 4400 RPM but this tag clearly states 172 HP at 4000 RPM. Is one rating at the crank and the other at the wheels or is fordification just wrong?


 
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Old Oct 7, 2019 | 11:51 AM
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Certified net was measured with accessories like an alternator and water pump to give a realistic as installed number. The 208 was advertised horsepower measured on a dyno with no accessories that a real engine in a vehicle would have. EDIT: The net horsepower was also measured with the factory breather and exhaust manifolds. The advertised gross horsepower would have used an air horn and dyno headers.
 
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Old Oct 7, 2019 | 02:47 PM
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Originally Posted by rjack1282
The fordification site says the "D" engine code is rated at 208 HP at 4400 RPM but this tag clearly states 172 HP at 4000 RPM.

Is one rating at the crank and the other at the flywheel?

Warranty Plate = The dead bang give-away: CERT.(IFIED) NET H.P.

1965/66 F100/350 352: 172 Certified Net HP @ 4,000 RPM .. Air cleaner decal: 208 (gross) Horsepower .. 4400 is the gross RPM

D = 1961/64: 292 4V; 1965 352 2V; 1966/78 330 2V Heavy Duty FT engine.

Y = 1966/67 F100/350 352 2V, 1968/76 F100/350 360 2V
 
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Old Oct 8, 2019 | 07:51 AM
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Thanks fellers.
 
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