Quote:
Originally posted by DealsGapCobra
Simple question...are both runs corrected to standard sea level conditions? This is a very reasonable thing to do and should be done. However, this would not explain the peak power being at a different RPM.
Did the guy in PA add any numbers? This is, in my opinion, not a reasonable thing to do and was probably not done. However, I know quite a few engine shops that use engine dynos "adjust" the numbers for a bunch of BS reasons (like internal friction, estimated accessory drag, etc) and then report power produced. They do this so that the customer can say (and think) he has a 450 Hp engine when it only produces 400 at the crank.
With the loss in high RPM power I would check the total timing (the distributor curve will be inconsequential at this RPM) and the fuel delivery.
Good luck.
Rob
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the PA shop says no, that the graph printed 351. I am 6 feet below sea level here. The PA shop is 780 feet above sea level.
The check of the timing is next. I asked this dutch shop (
www.moritztuning.nl) whether the Scott Drake fuel pump was inadequate or not. The owner says it should not make a difference. I was under the impression that I wanted at least a 110 gph fuel pump for this engine. the scott drake (I think it is a federal mogul) is probably more like 70-80 gph. After the timing is checked, how high on the list of suspects would the fuel pump be? Can a 80 gph deliver enough fuel at 6000 rpm?