Dodge Engine & Exhaust Performance All EFI, Hemi, Magnum, 4.7, 5.9

My hemi dyno.

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Old Feb 21, 2006 | 09:15 PM
  #1  
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Default My hemi dyno.

Finally took the truck to the dyno, these are SAE corrected numbers.

Mods Are:

Dynatech Supermaxx Long Tube headers
MagnaFlow SI/DO exhaust
AFE CAI
Superchips programmer
6.1L cam /w comp cam springs

The pic:


These are the best two runs, the red being the better at 312hp and 327lbs but both are nearly identical. The truck was warmed up so it might of been a little better cold. I was aiming for 320-325rwhp but that was the best I could get out of her. I don't think my truck is sick, or has any problems, it's just a little weaker then what some of the other hemi's have dyno'd with these mods, though if you have any tips for squeeking out a little more power, plugs, T stat... do share.

On the up side I was worried about my A/F but it's dead on, a little rich 12.5 till about 5K then slightly lean at a 13.4 right at 6K.

The vid, 14mb, give it time or right click and save as:

http://members.shaw.ca/tonydewaal/truck/DynoRun.MPG
This was the red pull, truck sounds good, despite being dirty, dam snow.

The one odd thing about the blue run was the power and torque are down till the hemi speed limiter wobble, then it comes up right in line with what the red run was doing. It was very noticable standing next to the truck when it was done, it sounded like it got new legs. In the video at the 30 second mark of the red run you can hear it pick up a little to a lesser extent as it goes through the wobble, it was like that but 5 times more noticable.
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Old Feb 22, 2006 | 01:39 AM
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looks to me you got a strong truck. if it is running rich, you are losing power when it warms up. mine is doing the same and i tested that theory that the hemi runs better when it is warm and that doesnt apply to my truck.
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Old Feb 22, 2006 | 02:03 AM
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Originally Posted by eabigrick
looks to me you got a strong truck. if it is running rich, you are losing power when it warms up. mine is doing the same and i tested that theory that the hemi runs better when it is warm and that doesnt apply to my truck.
Exactly, you will gain a few HP once the computer learns the cam better. How much time or driving since you installed it?
BTW the A/F at 12.5:1 is very rich for N/A. Target is 14.7:1. Not unusual for vehicles to be rich on the dyno, the stock computer likes to feed additional fuel to keep the cats cooler and from melting. A few more miles of driving should get the A/F leaner and more power.
Head work ( hone, port ) is freeing up an additional 40hp on other trucks with your mods. It comes at a price tho! Sweet numbers any way you look at it
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Old Feb 22, 2006 | 10:40 AM
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Interesting that I am rich, I would of figured I would of leaned up a lot. Good to know this pos computer can actually adapt to these mods. I've probably got nearly a 1000miles on the cam now though I've reset the computer about 100miles before the run, (to plug in the tcm wire, had to take it into the dealership) so maybe that has something to do with it.

On a side note the transgo shift kit is now also in, but there's a couple inchs of snow on the ground so I can't even begin to try it out, but it does shift from park to drive or reverse much quicker.
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Old Feb 22, 2006 | 06:53 PM
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Rich or not it seems to be running pretty damn good.
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Old Feb 22, 2006 | 07:30 PM
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Great numbers Toe. Did you install the shift kit yourself? Anything to it?
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Old Feb 22, 2006 | 08:11 PM
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I had a friend do the kit, but it was really straight forward from what I understand. I don't know the specifics, but within 2 hours he had it all back together.

Here's some pics of the kit and the instructions.




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Old Feb 22, 2006 | 11:47 PM
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Originally Posted by Toe
I wonder what this is about?
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Old Feb 23, 2006 | 01:32 AM
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It has something to do with fooling the computer into increasing line pressure. I've been told it's different then the tcm mod (wire pull to disable the torque managment shifting at WOT). As far as I know for the 03 Superchips Programmer it's shift firmness is exactly the same as the tcm mod. The 04+ could have something more hence the warning to skip it. Someone with a 4.7 dak installed the kit, liked it best without the programmer and the resistor in. Another 03 hemi owner is running both and likes it the best. I'll try all the combos to see which is best.
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Old Feb 23, 2006 | 10:38 AM
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Looks nice, update us on the shift performance once the ground thaws.
I would also think it is a TMR mod. Since the 04+ had the signal hard wired between the PCM and TCM this must be the non-programmer way of increasing line pressure based on TPS?!?
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