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I agree completely with soD and JMCC. The only way I know of determining power with any reasonable degree of accuracy is on a high quality load dyno.
Accurate fuel flow measuring instruments are expensive and as was mentioned, fuel density has a major effect on the outcome. I calculate my fuel flow based on accumulated injector on time over a set time period. The best I seem to be able to get is about +- 3% of actual averaged over a range of speeds and loads.
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Robert
'95 Ford E150 4.9L I6 Megasquirt MS1 Custom MSnS Extra
'92 Winnebago Elante 33 RQ Ford 7.5L V8 Megasquirt MS1 Custom MSnS Extra
'93 Bayliner 3288 Twin Ford 5.8L V8s (351 Windsors) converted to tuned port EFI. Megasquirt MS1 Custom MSnS Extra
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