Dyno question - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 11-15-2012, 10:19 AM Thread Starter
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Dyno question

Hey guys, picked up a 2010 F-250 4x4 CC a few months ago and will be taking it down to get it dynoed for the first time this Saturday and had a couple questions. First off the mods I have is a 4" MBRP exhaust, S&B intake, and a H&S Minimax tuner. I currently have the max boost defuel set to 39. The problem is I hit defuel fairly easily just making a brisk pass on the freeway. Should I turn it off completely for the dyno runs or just raise it higher? Secondly, should I be doing a 4th gear pull or 5th? Thanks for any help you guys can provide! I'm still amazed at how easy and cheap it is to bump up the power on these things!
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post #2 of 12 Old 11-16-2012, 03:37 AM
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I would turn it off, but if you want to keep it on set it at 50. As for the dyno, pull in 5th, or at least thats what we have always done here.

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post #3 of 12 Old 11-16-2012, 08:59 AM Thread Starter
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Thanks for the reply! Will go with that.
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post #4 of 12 Old 11-16-2012, 02:54 PM
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Post numbers please.
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post #5 of 12 Old 11-16-2012, 04:37 PM Thread Starter
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Originally Posted by Burner5509 View Post
Post numbers please.
Will do! One other question. Is the 5th gear pull ran all the way up to redline?
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post #6 of 12 Old 11-17-2012, 01:57 PM
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turn off all your defuels. it will be ok for the short bursts. dunno bout redline. i assume so. shop owner ran my truck on the dyno.

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post #7 of 12 Old 11-17-2012, 02:05 PM
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Doesnt need to go all the way to redline, but they will take it close.

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post #8 of 12 Old 11-17-2012, 02:14 PM
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I think it depends on the dyno operator. I have heard trucks sound like they were about 50 RPM from coming apart and had others end the pull as soon as the curves fell off.

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post #9 of 12 Old 11-17-2012, 11:14 PM Thread Starter
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No go on the dyno guys. Apparently they can't do diesels for some reason. I thought they were pretty much universal other than for awd vehicles. Piggybacked off of the local BMW folk's dyno day and was looking forward to killing their numbers! Oh wells, gotta track down a place that dynos diesels now. Thanks for all the tips guys!
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post #10 of 12 Old 11-18-2012, 06:31 AM
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Some dynos intercept the coil wire to track rpm's... Would be kinda hard to do on our rigs..
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