Dyno Tune Results
04-04-2005, 08:34 AM
#1
Dyno Tune Results On Saturday I took the Z28 to be dyno tuned. The shop had a different kind of dyno that is more accurate then the conventional Mustang and DynoJet dynos, it was a DynaPack 4000 (check it out)! It takes the tires (growth, slip, etc.) out of the equation for mor precise results, plus it can hold any load/rpm (+/-3 rpms) to effectively tune your vehicle (VE Tuning). On the first pass with the "OE" tune the results were 392.3 @ ~6200 rpm and 341.6 @ ~4800. Miserable, but on par with A&A's dyno results a couple weeks back. We noticed also that the wideband I had barrowed from a friend was not giving accurate readings, so we were forced to ignore those results and go strictly off of the DynaPack's WB readings. The AFR was 13.44 @ ~5400 rpms. We noticed that after the ~5500 rpm range, they would plummet! We tried adjusting the VE table and timing, but it turned out the intake and throttle body are the bottle necks. I am now looking at a more serious intake setup that will not be a restriction, nor will it be "street friendly". Not that the car is street driven. Anyway, the final results as best we could do were 405.2 @ ~5000 rpms (which only climbed to 408.2 @ ~6300 rpms) and 459.1 @ ~4000 rpms. That is an increase in HP by 15.9 at peak (76.5 at the bottleneck) and 117.5 in TQ. We noticed that she was leaving with about 110 ft/lbs of TQ off of the transbrake, while lifting the tires ... now she will be leaving (off of the transbrake) with over 460 ft/lbs of TQ. Can you say wheel stands! When I get the intake tract figured out, I will head out to this dyno place again to finalize the Z28's tuning. My engine builder and Tuner (Strictly Performance and HPTuners respectively) think this setup should hit 460rwhp no problem. It does look like it was on it way to that goal had it not been for the LS6 intake and ported OE throttle body.
04-04-2005, 11:57 AM
#5
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Why the 100 Trick fuel? 10.8:1 CR would be 93 level. Maybe a little splash of some higher octane, but unless you have the cr to need 100 you wont burn it as effiecently as something lower. Just a thought.
04-04-2005, 12:57 PM
#6
Yes, we are tuning it in open loop and speed density. I am going to go with an intake setup that does not resemble the OE ... also planning for my future setup for next season. 
Why the 100? I was running late for the dyno session and the Z28 had no gas. I would have preferred mixing some 87 in it (50/50) to get a 94 level. That is what I usually run in it, ~94 octane.
Why the 100? I was running late for the dyno session and the Z28 had no gas. I would have preferred mixing some 87 in it (50/50) to get a 94 level. That is what I usually run in it, ~94 octane.