09-17-2001, 03:31 PM
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Senior Club Cobra Member
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Join Date: Jan 1999
Location: MARKSVILLE,LA.,,
Posts: 3,235
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Not Ranked
I have been playing with the Desktop Dyno since it came out and I have had the chance to "run" two motors on the Desktop Dyno that had been run on real dynos. One was a 600 cu in Ford Pro Stock style motor that made 1,000 hp and the other was a 383 Chevy stroker putting out 475 hp. The big block came in at 8% over actual dyno numbers and the 383 came in at 5% over actual dyno numbers.
The biggest "unkown" so to speak is the head flow and also things such as rods are not taken into account and really can not with the software.There are other things that you can not account for either such as your bearing clearances and piston to cylinder tolerances and such that will make a difference in hp readings.
All in all,I think it is good for us "armchair" racers to fool around with and pretty close for the type of stuff we usually do with our engines. Around here, actuall dyno time goes for about $50-75 bucks an hour with a $200.00 min. which is really not bad for a dyno tune...
David
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DAVID GAGNARD
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