2008 fx4 Black Maxx - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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  #1  
Old 01-10-2010, 05:12 PM
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2008 fx4 Black Maxx

I recently purchase a 6.4 due to my dd Lightning being in the shop. I've added a cai, dpf delete, dpf back 4" and the H&S programmer. I'm pretty happy with the power but I had it on the dyno and I'm wondering about the power it made.

No Power- 273.53 rwhp
Mild- 339.46 rwhp
Wild- 381.00 rwhp
Hot- 410.02 rwhp

Are these numbers low...or normal? Can I get more power by actually having it custom dynotuned?
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Old 01-10-2010, 05:15 PM
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The hot tune seems low, Another guy on here says his truck made 519 rwhp.
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Old 01-10-2010, 05:27 PM
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Mine did 531/1116 corrected on a Mustang 1100. Seems real low to me.
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Old 01-10-2010, 06:04 PM
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Those numbers are VERY low.....looks like to me that the dyno didn't load truck good at all once tuned.....The stock power seems about right, but after you added horsepower to it the numbers look really low. The Wild and Hot tunes look low for sure...not real sure on the Mild tune.
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Old 01-10-2010, 10:20 PM
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So that could be the dyno and not the tune?
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Old 01-11-2010, 06:19 AM
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The stock setting is just about right. Most trucks will do right around 275 stock. The others, I don't know..
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Old 01-11-2010, 07:06 AM
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Those numbers for sure sound low.

That truck should easily be 500hp to the wheels on the HOT setting when the dyno is set up properly.
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Old 01-11-2010, 10:31 AM
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I am thinking a dyno flaw!
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Old 01-11-2010, 05:28 PM
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Not enough load on the dyno.
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Old 01-11-2010, 07:29 PM
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I know it was a dynojet and I've been told it doesn't simulate the load or however that works. Well I guess that settles it then...

Another thing I've noticed is no matter what mode I'm in I can't get more than 16.8 mpg? Also, what is the best mode to run in for efficiency?
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