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> Horsepower Ratings, Net...Gross...???
Tom73
post Mar 23 2005, 09:01 AM
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Was wondering about the HP ratings used for the 914 engines. Are they GROSS or NET rating. I know most of the American companies changed from Gross to Net around 1972, in the middle of the 914 production. So for comparitive purposes was wondering how the engine was rated?

(did a search on this topic to see if it had been discussed before but that came up empty.)

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Tom73
post Mar 23 2005, 02:45 PM
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QUOTE (Brando @ Mar 23 2005, 12:37 PM)
I thought gross HP ratings were when they bolted the engine itself right up to a brake and tested purely the engine's power rating. Net would be in a car, everything attached, rear-wheel testing?

Gross is at the flywheel with no accessories, no air cleaner assembly, no stock exahust manifolds/mufflers (used headers with open exhaust), no emissions, no alternator, etc etc.

Net is also at the flywheel but with all stock/standard equipment in place. Stock exhaust manifolds running through stock exhaust, stock air cleaner assembly, alternator, emission equipment, etc.

The factories do not do any HP ratings at the wheels, that is a Hot Rod/aftermarket thing. All factory ratings are at the flywheel.

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