Originally Posted by Dropspeed

Lat time I checked we couldn't race dynos..................take the car to the track and see what it runs!

Warrtalon:

You mentioned that the changing the weight will make the reading differ. After my car was dynoed with a weight of 3250 in the dyno and the lower hp at 50 I spent some time investigating this claim. I spoke with both Mustang Dyno and the dyno facility that dynoed the car.
Now first let me say that we all agree the the numbers that where put into the dyno where not correct according to SAE specs. But what does that change?

The weight and hp @ 50 change the resistance on the dyno (load). This will change the time it takes to make a pull, (sweep) at higher RPM, the higher numbers will load the dyno more. The less weigh the shorter the sweep (for the example we will say 8 seconds) with more load it could take 10 or more seconds. Typically when there is more load on a vehicle it will make more power on the dyno. So a shorter "sweep" would equal less power.

I did not rerun my vehicle but the facility did a couple of "tests" for me on another vehicle. They ran the same car through 3 different time sweeps 8 seconds, 10 seconds and 15 seconds to simulate a lower weight, SAE weight and heavier weight on the car to increase loads

The results:
8 seconds = 375 whp
10 seconds = 383 whp
15 seconds = 390 whp

Now this was on a 2005 GTO so it is not an EVO, but experiance says the results would be similar.

So from my "investigation" my car "should" make more power on the dyno if the weight and hp @ 50 were increased........................but I don't care enough to run it again to find out. It runs a 112.97 trap which is proof enough for me it makes decent power.

NOW back to the thread topic. A DYNO, LIKE ANY PRECISION MEASURING INSTRUMENT IS ONLY AS GOOD AS ITS USER. You CANNOT compare two dynos in two different buildings let alone two different states. It doesn't matter if MUSTANG DYNO calibrated it or not. It is still up to the facility to enter the correct numbers, weather data....ECT. NOT to mention that the way a facility straps the car down can have an impact on the results. (They SHOULD NOT load the suspension in any way. Common mistake)

Now with that said I believe that the MUSTANG DYNO is the most accurate (Best) on the market today for correct, repeatable numbers. the only reason that the Dynojet is considered the "Industry standard" is because people in the so-called "Industry" want to buy a dyno and the the Mustang is 2 or 3 times more expensive that the Dynojet.

(PS I Have worked with three different MUSTANG DYNOS and purchased one for a facility I was at a few years back so I have seen the calibration process ECT. ECT first hand it is not an exact process..............But I am always learning)


PS Nice Numbers.................Now take it to a track and back them up.

Matt J.

Originally Posted by Warrtalon

Btw, I didn't say vehicle weight, I said roll weight. This has a HUGE impact on the results and is the main thing that is changed to help produce higher numbers that are more like a Dynojet.

Of course, I always say "take it to the track," but that's not feasible this time of year.

Originally Posted by jayhawker

What the heck are you talking about? It's almost 85 degrees outside right now!

That's one thing I do like about Phoenix. No snow, just old snow birds.