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

Ordered some stuff for my Ram RT today!

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Old 09-04-2011, 10:56 PM
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Have been wanting to try one of those apps for my phone. How do you calculate your drivetrain loss?
Old 09-05-2011, 06:38 AM
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Most dyno stock around 303-305 rwhp. So at an advertised 390hp Flywheel i figured around 29% drivetrain loss to make up for the difference
Old 09-06-2011, 08:24 AM
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I'm not too familiar with these trucks yet, even though I own a express model but 29% drivetrain loss seems a bit high to me. But the low 300's RWHP sounds about right from what I have saw on the internet. I have done CAI and just a muffler swap and can't feel anything seat of the pants ( nor did I really expect too, but damn does the exhaust sound good to me!)
Old 09-06-2011, 03:59 PM
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Well I also figured, rolling on 22's, the converter and 4.10 gears would probley make it dyno just a tad lower than your truck with 3.55 gears.
Old 09-08-2011, 05:06 PM
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Originally Posted by onequick5.3
Well I got Dynolicious for the I Phone, looked up the weight, which was almost 4940 with me in it. Motor Trend said the truck weighs 4779. Plugged in 29% drivetrain loss. which equates, to 390 rated horsepower, most stock put down 303-305 to the wheels.

So on 22's 60 degrees out flat road. With traction control off I spun bad off the line, it ran a 0-60 in 6.65 seconds, and ran a 15.4@ 86.6 mph with a 2.67 60 foot. So I think theres ALOT to be left on the table. That also included reaction time as well. So if I can get it to hook and work on reaction time, I think I can get a low to mid 14 pretty much stock.

Tell me what you guys think this drag racing calculating stuff is new to me. I know this probely isnt 100% accurate but it does give me a starting point.
My buddies 5900# Dodge Laramie went 15.5@90. DA was about 3000 that night. Yours definitely has some room for improvement.
Old 09-08-2011, 09:24 PM
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Thanks, it runs really well, but after a custom tune im gonna get some Bogarts and some stickier tires.
Old 09-10-2011, 10:38 AM
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Ok heres the rundown... Went out again. With now 998 miles on the motor I can hear a difference, probley the breakin in process. So with the Arrington 85mm TB installed I went out on the same streatch of road. Set up under the same program the same way without stalling it up it still spun pretty bad. But this time better results

14.81 @ 94.7 mph
60' a horrible 2.64
0-60 6.27 seconds
1/8 mile 9.65 @ 76.8

So its getting better just need some better tires and wheels...

If i could get that 60" down to 2.00 flat or high 1.90's what do you think I could run, maybe a low 14?? or high 13?
Old 09-10-2011, 10:40 AM
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With a 2.00 flat I would estimate you running around a 13.9
Old 09-14-2011, 03:10 AM
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I'm curious if your trucks gonna come to life when ya hit 2k miles my rt would bark tires first day and when I hit 2k last week if I go wot at stoplight I'm blowing rubber everywhere lol
Old 09-14-2011, 05:51 AM
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Your trap speed is pretty good there. I would agree with ak2007R6, with a 2.0 60 foot time and a 95 mph trap, 13.9-14.0 is probably what you're looking at. My RT isn't broken in yet but at 1000 miles it will be headed for the dyno and the track for some baseline numbers.


Quick Reply: Ordered some stuff for my Ram RT today!



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