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SAE vs. STD Dyno Comparison!

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Old Jul 21, 2002 | 11:51 AM
  #1  
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BfB
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Thumbs up SAE vs. STD Dyno Comparison!

To Everyone: ALWAYS have your #'s displayed in SAE. That is the ONLY true way we'll get accurate comparisons of these trucks.

Here's the reason why:

BfB's '01 COMPLETELY Stock using STD as the correction:


BfB's '01 COMPLETELY Stock using SAE as the correction:
 
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Old Jul 21, 2002 | 11:16 PM
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Hey BFb,

What were your Cyl head temps?? How about air inlet Temps? Humidity?
TRUE Reading?
 
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Old Jul 21, 2002 | 11:24 PM
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I have no idea what my cylinder head temps were, as we didn't measure anything else but the power. It was a HOT day, let's just put it that way

Here's an "Actual" power graph with conditions, though:



#'s on Actual were:

Max Power = 330.15 Max TORQUE = 398.26

As I said, it was a NASTY hot day and the humidity was awful (near 100%).
 

Last edited by BfB; Jul 21, 2002 at 11:26 PM.
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Old Jul 22, 2002 | 12:07 AM
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Re: SAE vs. STD Dyno Comparison!

Originally posted by BfB
To Everyone: ALWAYS have your #'s displayed in SAE. That is the ONLY true way we'll get accurate comparisons of these trucks.

Even if everyone begins using the appropriate correction factors (which would definitely be a good thing), results from two different dynos should not be compared. All dynos are different from model-to-model and brand-to-brand. Even two identical Dynojet models will produce different results, often being off by several percent. If one is just 3% over and the other is just 3% under, on a 350 HP engine, the error would be about 25 HP between the two. Camparing results from different brands of dynos can produce differences of 20%!

The only accurate way to use a chassis dyno is to do before-and-after comparisons on the same dyno.
 
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