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What are you able to get on your dyno graphs in your 2021 Durango R/T TnG under WOT?

  • Expected horsepower numbers (350-370 HP)

    Votes: 3 25%

  • Less than expected but within 20% drivetrain loss (290-350 HP)

    Votes: 1 8.3%

  • I get a LOT less than expected (under 290 HP)

    Votes: 8 67%
  • Total voters
    12
61 - 80 of 85 Posts
#61 ·
va-terps4 said:
I have always felt my 2021 TnG to be a good bit slower when compared to my 2018 R/T AWD. As has been mentioned before, there are some potentially significant differences between the two:

1) Heavier rotating assemblies, including much larger SRT wheels and tires, and the increased size of the rotors.
2) Bigger Brembo calipers on the TnG. While these are not rotating, they are heavier that the R/T
3) Larger, potentially heavier exhaust system. It sure does sound good tho, and might actually breathe a little better.
4) Completely different AWD system. The TnG uses a full-time AWD unit, while the regular R/T was on-demand AWD after detecting slip.

Beyond the butt dyno, there's also the performance pages, which on my truck have shown what I interpreted to be a huge loss of hp. I've never seen a wide-open throttle reading on my TnG higher than 229-232 hp, despite the 5.7L HEMI spec being 360 at the crank. But while trying to take a closer, more diagnostic approach to the data I noticed something important. With the display set to kW instead, my graphs looked exactly the same, and my page 2 readings were also giving me 229-232 kW. HP and kW use different scales. According to google, 1 kW = 1.34102 HP. So if the performance pages work correctly, it should be impossible for WOT to register the same numerical value on both. My assumption is that the Uconnect5 is not changing the math for the performance pages from kW to HP. Basically, that 229 kW should become 307 HP... that's still low for a motor with a 360 HP spec, but it could be including some pre-programmed drive train losses. Maybe DODGE would know. Maybe not.

So here is where the story starts to get interesting. I decided to put my 2021 TnG on a local shop's Mustang AWD dyno this week. I wanted to verify that it makes the right power numbers since this whole situation with the Uconnect had me second guessing. The guys I went to do a fair amount of Dodge tuning, and more specifically they do a lot of 5.7L HEMI tuning. Superchargers, Prochargers, ECU tuning, etc. They know their way around this motor, and they had some ideas of the numbers we could expect.. and then they put it thru a couple of pulls, and did a simulated 1/4 mile run. The TnG put down bigger numbers than I expected by a long shot. Actually, it put down bigger numbers than the shop guys expected too. All of this goes directly against what I was feeling on the butt dyno, so do I take these numbers with a spoon full of salt. However, the graphs make it pretty clear that this truck is not struggling. I now think we have a combination of things going on:

1. The TnG upgrades - especially the wheels, tires, brakes, and transfer case contribute something to the feeling of sluggishness.
2. We already know the Uconnect5 is riddled with bugs. There appears to be a bug on the performance pages causing kW numbers to be shown in the HP setting.
3. Given the numbers on the dyno, and the times from the simulated 1/4 mile run, I don't trust the truck's performance timers now. I think I need to break out my old G-TechPro.

Finally, there's a big factor that we haven't addressed thus far... engine break-in. My truck is still under 6900 miles. I think this motor is just starting to open up. Going back to my 2018, I recall thinking similarly on the R/T up to around 10k. After the dyno runs this week, I'm confident there is nothing wrong with the motor on this truck. I'm also confident the Uconnect software was rushed out the door, and woefully under-tested. If they can get the OTA's working that might work itself out over time... I plan to notify Dodge of this performance pages bug (and a couple others) soon.

So, now I can focus on the two remaining issues... the crazy 4k rev hang and the suspension noise I get from the rear going over aprons and speed bumps.

I'll post the dyno results on a new thread shortly...
Click to expand...
paging va-terps4... paging va-terps4...

would you please come to the front of the store and meet everyone that wants to see your dyno numbers...

;)
 
#62 ·
I do love me some clever posts.:p
 
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#63 ·
Hey all, new here and I just picked up a 2021 DDRT TNG so I was interested in see the dyno numbers from va-terps4.

Forgive me if anyone already posted this, but here is a youtube video with some good dyno info:
“394 HP / 420 LB-FT Torque at the crank! “
"The 6th gear in this vehicle is the 1:1. However, there's not enough power to do a proper dyno pull in 6th. So we did a 5th and 4th gear pull. We did 3 runs then let it cool for almost an hour and did 2 more pulls. The best numbers we got were 323 WHP / 345 WTQ which equals 394 HP / 420 LB-FT Torque at the crank! Dodge advertises 360HP / 390 LB-FT. This was done on a Mustang Dyno which are known to be conservative."
 
#64 ·
Kdub said:
Hey all, new here and I just picked up a 2021 DDRT TNG so I was interested in see the dyno numbers from va-terps4.

Forgive me if anyone already posted this, but here is a youtube video with some good dyno info:
“394 HP / 420 LB-FT Torque at the crank! “
"The 6th gear in this vehicle is the 1:1. However, there's not enough power to do a proper dyno pull in 6th. So we did a 5th and 4th gear pull. We did 3 runs then let it cool for almost an hour and did 2 more pulls. The best numbers we got were 323 WHP / 345 WTQ which equals 394 HP / 420 LB-FT Torque at the crank! Dodge advertises 360HP / 390 LB-FT. This was done on a Mustang Dyno which are known to be conservative."
Click to expand...
I'm interested in seeing them as well, but he's just a big tease and won't post them.

Those are some great #'s though!
 
#66 · (Edited)
I have 2,200 miles on my TnG now. Pretty happy with it except for the paint. I run 89 octane and it is all stock. On the calculator, I'm getting about 16.6 mph avg. Computer shows about .5 mpg higher. This is babying it. Anything over 65 mph exponentially worsens your gas mileage I've found out. Seems to be about 2 mpg / every 5mph. On the interstate at 71 mph, I pull about 19-20 mpg (instant mpg). Now for the 0-60 times...On a flat road, non windy day...well take a look below for yourself... I do not "preload" the engine while braking. It's foot off brake, and mash the gas. No low end bog when I mash it. Sport or track mode, same results. Have not tried in regular/eco mode. Pulls .85 G on full acceleration. Seems very strong. And this beast is LOUD!

Image
 
#67 ·
Srichey250 said:
I have 2,200 miles on my TnG now. Pretty happy with it except for the paint. I run 89 octane and it is all stock. On the calculator, I'm getting about 16.6 mph avg. Computer shows about .5 mpg higher. This is babying it. Anything over 65 mph exponentially worsens your gas mileage I've found out. Seems to be about 2 mpg / every 5mph. On the interstate at 71 mph, I pull about 19-20 mpg (instant mpg). Now for the 0-60 times...On a flat road, non windy day...well take a look below for yourself... I do not "preload" the engine while braking. It's foot off brake, and mash the gas. No low end bog when I mash it. Sport or track mode, same results. Have not tried in regular/eco mode. Pulls .85 G on full acceleration. Seems very strong. And this beast is LOUD!

View attachment 119799
Click to expand...
I concur on the MPGs at 7,800 miles on the clock.
 
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#70 ·
Durango srt lite said:
You guys are lucky. I'm at 2,500 miles and am barely getting 10.5 when driving aggressively in the mountains and in my day to day best 13.5mpg.
Click to expand...
Let me clarify. The best I am able to achieve on a 500 mile round trip mostly freeway is 19-20 mpg. I get 13.5 mpg on daily commuting. I thought my 2012 DDRT performed better on the mpgs.
 
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#71 ·
63gearhead said:
Let me clarify. The best I am able to achieve on a 500 mile round trip mostly freeway is 19-20 mpg. I get 13.5 mpg on daily commuting. I thought my 2012 DDRT performed better on the mpgs.
Click to expand...
Last year from Chicago to Denver I got 22.8 mpg. I use cruise control as much as possible and drive 70 mph on the interstate.
 
#72 ·
Vice-White said:
I checked my graphs this morning. The line graph showed around 330lbTQ and 220HP but the circle graph showed 275HP and 380lbsTQ
These are estimates as it is hard (lie everything else on the 10.1 system) to read while driving. In this weather my truck runs 7-7.2 0-60mph but my best ever in the 50s temp was 6 flat. BA BAM !
Click to expand...
Been doing alot of pulls, different gears, from a stop and the best numbers I keep seeing is 235ish horse and 330 torque....have a feeling something is off....TNG seems fine, but I'm getting a ltl freaked out...plus I'm assuming these numbers are supposed to be crank and not to the wheels power...🤯🤯🤯
 
#73 · (Edited)
Den350r1 said:
Been doing alot of pulls, different gears, from a stop and the best numbers I keep seeing is 235ish horse and 330 torque....have a feeling something is off....TNG seems fine, but I'm getting a ltl freaked out...plus I'm assuming these numbers are supposed to be crank and not to the wheels power...🤯🤯🤯
Click to expand...
If those numbers are supposed to reflect horsepower at the crank, I would be worried. I haven't messed with it at all, but mine feels strong! Also, not sure how much stock I would put into that graph accuracy. Maybe find a local speed shop and have them put it on a dyno if you're worried enough about it.
 
#75 · (Edited)
it is the programming of the software. Does anyone think Dodge can program features well?

Their programming algorithm figures out the adjusted HP and TQ since HP and TQ in any gear higher the 1:1 ratio would show those numbers off the charts. So Dodge adjusts it using their software and they do a terrible job at it.
My R/T has gone 5.6 0-60mph on a 40 degree day. I can tell you there is no way my Truck has 220HP at the tires. If it did, I would not be able to run 5.6 0-60mph in a 5Klb truck.
 
#76 ·
Both Dyno charts on my 2021 TnG also appear to show KW numbers for HP. (HP= KW X 1.341022). @ 240 to 260 numbers. Esay way to know it is displaying incorrect is look at torque at 5250 rpm, that number is HP at 5250. ( torque x rpm (divided by 5250) = hp. (period).
As far as )-60 times, @40 degrees, sea level, less then 50% humidity, stock 6.7, CAI 6.2, track mode 5.7...@76 degrees, sea level, > 70% humidity with 6.4 intake and no SRI controller, track mode, stock SRT air cleaner 7.1,( stock RT air cleaner the same). CAI then droped it to 6.7 sec. With ZAutomotive operating at 4350 rpm 6.2 sec. Never has HP on Performance page has ever been above the number 260..(about 338 hp?)
 
#77 ·
Vice-White said:
it is the programming of the software. Does anyone think Dodge can program features well?

Their programming algorithm figures out the adjusted HP and TQ since HP and TQ in any gear higher the 1:1 ratio would show those numbers off the charts. So Dodge adjusts it using their software and they do a terrible job at it.
My R/T has gone 5.6 0-60mph on a 40 degree day. I can tell you there is no way my Truck has 220HP at the tires. If it did, I would not be able to run 5.6 0-60mph in a 5Klb truck.
Click to expand...
What did you use to measure your 0-60?
 
#79 ·
Crazypirate said:
I understand this was not directed to me, but all my times are off the performance Pages on the dash that comes with TnG or SRT package.
Click to expand...
yes but vice has no confidence in the programming and software in these vehicles. I doubt he’d rely on the onboard for accurate 0-60 times? Mine shows a 4.2 but I take that with a grain of salt……
 
#80 ·
Totally agree, track, performance pages, dyno's.. All depend on alot variables..but 4.2 does seems awful quick to me, but been wrong before. ..mine varies alot depending on launch..Not an expert. Just on the way to work at o dark thirty..Things I know, CAI helps alot on big end. (above 3.5k)..6.4 intake really helps below 4ish K..winter vs spring in Panama city killed 30 hp per da caculator and testing..She pulled 17 pulling an al flat bed car trailer on first tank..18 mpg on 2nd tank.(1300lb)..14.2 with a 69 camaro convertable (total 4.7k lbs) all at 5mph under I65 speeds.. Have no ideal what she does empty. Not What I bought it for, classic fast stuff are on the trailer and carries the front wheels, but it is nice with a AWD and no spin...
Cheers. ..Pro/cons on everything 🙄
 
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