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Old 08-14-2006, 07:49 PM   #1 (permalink)
machnjo
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Join Date: Apr 2006
Location: Austin, Texas
Posts: 1,086
Default Finally got the graphs

I had to download the Dynojet performance eval program in order to read the results from saturdays dyno runs.

The first graph is the mach's baseline from apr'04 and the first run from saturday without the Diablo Predator tuner installed. I was pretty happy with the peak numbers from the baseline to current mods, but not happy with how lean it was running.

So, we loaded the default tune from the Predator. The second graph shows the default run and the final run we made after dumping fuel into the program. I just wanted to show ppl why its not a good idea to run with the boxed program. We lost a little bit of power and torque, but the A/F is all over the place and if I ran the mach that way, it wouldn't have lasted to long before some kind of major malfunction. The final run flattened the A/f ratio to a point where I was satisfied, though I still need to make a few more runs to tweak it a bit. I want the A/f on or below 13.0 and still keep it above 300 rwhp / 320 rwtq.

It looks like I start making power around 3.5k, max hp @ 5k which holds til around 6.3k. As for speed (in 4th gear), I max hp at 105 and stay steady til 135, then power drops off at that point.

Looks like I'll be doing the intake spacer mod to see if I gain any performance in the mid range, also going to change to mid-length headers instead of the shorty's I have now. Since the machs not my DD anymore, I'll be going with an o/r x-pipe as well. I foresee many days at the dyno in my near future.

I haven't prepped the graph for the GT, but it was actually 222 rwhp / 241 rwtq
Attached Images
File Type: jpg Machdyno01.JPG (122.6 KB, 56 views)
File Type: jpg Machdyno03.JPG (128.8 KB, 44 views)
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2004 Screaming Yellow Mach 1 (5spd)
2002 Mineral Grey GT (auto, DD)
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