12-10-2009, 07:59 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by vector1
this i find very interesting.
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A couple of years ago we had a nice thread on "Dyno Games" and tricks that can be used when putting an engine, or car, on a dyno to get higher numbers. We also had a discussion, and at least one of the better known engine builders participated, on the validity of advertised HP numbers. In response to my question on why the engine dynos are done with open headers (when nobody around here runs open headers and the exhaust sucks a huge amount of power off) he truthfully answered "because everybody else dynos that way and if I put an exhaust on there my engines won't appear competitive" -- or something like that. IMO, a "truthful dyno" run is done with the exhaust bolted on and the water pump pumping. |
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