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Dyno Question- Help??

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Old Nov 27, 2007 | 11:15 AM
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9secondflat's Avatar
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From: sterling ct
Default Dyno Question- Help??

i have the chance to buy a nice c5, but my concerns center around the dyno figures of a SUPERFLOW AUTODYN EDDY CURRENT chassis dyno vs a Dyno jet dyno. the seller of the car is telling me that a superflow is always going to read low by about 10% compared to a drum dyno such as a dyno jet. Here are the numbers generated on his 383

torque- final SAE Trq 404 @4900

hp-FINAL SAEPrw- 392 @6200

he is telling me that the conversion to a Dyno jet would yield torque figures at the same rpm ( final IOC Trq 450 Clb-ft and Final IOC Pwr 433 CHp.

Ioc= inertia- only comparison

what is your opinion?? is this bull **** or true??

thanks
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Old Nov 27, 2007 | 12:35 PM
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From: Madison Wisconsin
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Post your mods so people can tell you how accurate the dyno probably is. I've never even heard of that kind of dyno. All we have around here are dyno jets and mustang dynos.
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Old Nov 27, 2007 | 12:44 PM
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it is a c5 corvette built by lingenfelter, typicall he uses a 211/219 cam/ long tubes- 6 speed
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Old Nov 27, 2007 | 01:51 PM
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From: East Hampton CT
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Originally Posted by 9secondflat
it is a c5 corvette built by lingenfelter, typicall he uses a 211/219 cam/ long tubes- 6 speed
Doesn't lingenfelter provide dyno charts with their builds?

211/219 cam + LT's on a non Z06 MN6 sounds about right on the hp (approx 400rwhp). Might be a litte generous but not too much.

Each dyno is different, so even comparing two dynojets can net you different results.

My 228/232 .588/.590 112+4 cam + Ported LS6 heads + LS6 intake + LT's gave 412rwhp and 394tq on Slowhawk's dynojet (Dez Racing). I was expecting higher but we ended up finding a loose intake later which could have been screwing up our tuning.
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