I went to a local place that was running a dyno day, $40 for 2 runs and a 1/4 mile simulation. Due to the loading capabilities of the Mustang Dyno they have, we have that it can accurately simmulate the 1/4.

I just wated to get a comparison between closed and open cutout, and was surprised by the numbers I actually produced...

Knowing that a Mustang Dyno normally reads low I thought I might see 250ish rwhp or so because the car only has:

So when I got 281.6 @ 5000 and 307.3 @ 4000 with the cutout closed I was suprised. The guys running the dyno started the run @ 90 MPH and stoped at 135 thinking I had 3.23 gears so it only tested until 5000 RPM's and HP was still climbing, you get what you pay for I guess...

With the cutout open and the run parameters kicked up to end the run @ 140 I made 296.0 @ 5250 and 338.1 @ 4500... too bad that it adding 5 mph only got me a few more RPM's, damn 2.73's , because it was still climbing when the run ended at 5250 RPM's. we speculated that if we increased the run length that it would get close to 300, but then again it could just flaten out where it was I guess that is their way of trying to get you to pay for another run, I didn't bite though...

Ok in the 1/4 mile run it got:
Distance____Time____Speed
Reaction ___1.137
60'________1.566____37.546
330'_______5.025____65.521
660'_______8.013____83.459
1000'_____10.610____94.723
1/4_______12.805____102.742

Now I know this is almost as bad as guys going out and saying their G-tech times are soo great.. But I think this is reasonable considering that the 13.2 @ 103 in my sig was 3 weeks ago and I was getting 1.94x 60's, and if you take the conversion factor of 1.5 tenths in the 1/4 for every tenth in the 60' then that would drop it by more then a half a second... I just wish I could get that type of traction at the track

We also had a few guys that actually ran almost identical times on the dyno to what they run at the track, so we used that to determine that it was pretty accurate.

 

Mustangs dynos...eh....

My understanding is they have been fidgeting with the way the generate #'s to be closer to Dynojets...

But your car is making good power to run those times and they probably are close.

You 1/4 run is the exact reason I do not like Mustang dyno's...you know that that the run is skewed...to many tards out there do not understand that.

 

There were a few guys there running the same on the dyno that they ran at the track, one was an LS1 SS, sorry don't remeber the year, that ran 12.6 both on the dyno and at the track with very similar 60' times in both runs...

My only question is why my MPH was down almost .6 MPH? because I was under the impresssion that the track I go to takes and estimate of the last few feet and speed to calculate the MPH or something like that... I thought that would be less accurate, but never thought it would read higher...

The guy running the dyno said that the MPH was down because of the 1.5 60' and that when it spins it helps MPH a little, due to spinning and rolling out then when it starts to really move it has the tires already going or some crap like that...