So my truck is hitting the dyno this weekend... - Ford Powerstroke Diesel Forum
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Old 07-15-2008, 01:12 PM
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So my truck is hitting the dyno this weekend...

Ok I got a couple questions. First off, I've never been on a dyno in my life. Dont really know what to expect. Is there any special steps I want to take when doing this? Is there a preferred gear to run in? (automatic btw) anything I should check on the truck or anything I may want to tweak a bit before putting it on?

Also I have a few different tunes I want to try, my question is, am I better off leaving one tune on for the next couple of days for the computer to learn settings or is it ok to switch tunes while I'm there and run them back to back? I'd think it'd be better to leave one in and drive for a few days first, but just wondering if it will make a difference. I will be using my ID tunes, and I also have a few spartan tunes I'd like to try for comparison sake. Whats everyones thoughts on this?
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Old 07-15-2008, 01:17 PM
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I had mine on the dyno a few months back. I too have an SCT, but run DJ's tunes. Mine is also an automatic. Just leave it in 3rd gear (3) throughout the run. This way it will not shift into overdrive and possibly jump off the dyno.

Also, punch it as early as possible once you get a slow roll in 3rd. I floored it from just under 1200 rpm's and would have seen higher numbers if I had done it sooner than that...this, of course, is depending on the tune. I was running a modified looney created for me.

Good luck and post those numbers up on here



Sergio
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Old 07-15-2008, 04:20 PM
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So just leave the shifter on the 3 and I'm good to go? Sorry these auto's are also a new thing to me! Anyone have any insight about the tuning?

I will definitely post numbers up on here.
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Old 07-15-2008, 04:31 PM
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3rd gear will give you skewed results(higher numbers). The truck needs to be dyno'd in 5th gear, which is 1:1. You feel it as the shift to 4th gear.
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Old 07-15-2008, 05:50 PM
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The best way is to get Eric to write you a dyno tune that locks the tranny in direct drive so you don't have to mess with an incompetent dyno operator that can't keep his foot outta the throttle enough to keep it in 1:1.......unless it's David Dunbar who is the MAN on a dyno.
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Old 07-15-2008, 07:29 PM
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Actually I'll be the one running the truck on the dyno, which is why I asked. Eric, can you elaborate on the 5th gear run? Is this conceivable for me to do, or just the hypothetical way to do it?
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