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Old 03-06-2008, 10:14 AM
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Anybody with a desktop dyno

Hello, does anybody have a desktop dyno that they could run what I have?
-Standard bore/stroke 400 small block Chevy
-10.35:1 compression
-Performer RPM aluminum 64cc heads (slightly ported)
-Comp Cams 292 Magnum cam (advanced 4 degrees)
-Proform 1.5 roller rockers
-RPM Air-Gap intake
-750cfm Holley mechanical secondary
-Hooker 1-5/8 headers w/3-inch collectors (open)
-Lightweight crank and rods
The previous owner dynoed it on an engine dyno and it was 475 with a set of old cast iron heads ported terribly, a Victor Jr. intake, and a 780 holley. I was wondering if I would have any change in horsepower. Thanks alot.

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Old 03-06-2008, 11:04 AM
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You can download a free one at http://www.compcams.com/Camquest/
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Old 03-06-2008, 11:08 AM
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I have one of those but I don't know how accurate they are...it says 494hp at 5500 and 515ftlbs. at 4500. Healthy enough for me, I am expecting a little less than that on an expensive one.
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Old 03-06-2008, 05:51 PM
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I have Desktop Dyno 2000 and it says 425 HP at 5500. It wont take into account a lightened rotating assembly, and I only have flow numbers from the Edelbrock catalog so the porting will add some. I don't think they are super accurate, probably pretty close for a SBC, but they are good tools to see trend information as to what will have the most effect.
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Old 03-06-2008, 05:59 PM
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Thank you very much, I appreciate it. I don't know what to expect because I am moving up from a small journal 327 with the same stuff except for the cam...it was a .470 lift cam 226 @.050 duration.
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Old 03-07-2008, 09:17 AM
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You can download a 450 dollar program for free at www.performancetrends.com it is the full version and good for 10 days. The more you know about your engine the more accurate it will be .
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