ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2 - Jeep Garage - Jeep Forum

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Old 09-04-2014, 08:17 PM
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ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2



Above is the before and after result from tuning the ECU in my 2013 Trailhawk CRD. Obviously Red is before and Blue is after.

I'm very happy with the result and the car feels fantastic, you can sort of still tell it is held back by the DPF but the car pulls cleanly to the redline and extra the torque from idle is immediately noticeable. Overtaking is now even more effortless. I'm not really keen on claiming engine power and torque figures from a dyno graph but you can't ignore the fact that it shows 20% more power and 23% more torque at the wheels. You do the math.

I will get an idea what this has done to my economy over the coming weekend but so far it looks promising.

Sorry the power figure are in kilowatts. (1kw = 1.34 hp for those with a calculator)

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Old 09-04-2014, 09:00 PM
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Re: ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2

Same question as in your other post.
How do you deal with the gearbox being rated to a max input of 580 N-m now outputting 677 N-m?

Your image is hosted on AJOR, so only members also logged into AJOR can see it.
Here it is for everyone to see.

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Old 09-04-2014, 09:06 PM
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Re: ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2

Hi Snuke,

That gearbox is the same gearbox that is in the SRT8 with 640nm. Additionally Chrylser has been using that trans in the 300c 5.7 and 6.1's since 2005 where I personally have had plenty enough experience with them in highly modified cars (way more than the rated torque capacity) to be confident the transmission will live a long healthy life.

I appreciate the link update.
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Old 09-04-2014, 09:46 PM
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Re: ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2

It’s odd, in one reference it is the W5A580 which is what the 580 N-m max reference comes to, however, as the MB 5G-Tronic, it has a rating of 1080 N-m max. A slight difference.
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Old 09-05-2014, 03:43 PM
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Re: ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2

ZF overbuilds their transmissions.
On BMW 335's which are tuned from stock 280hp/ 332 lbs-ft torque at the rear wheels to well over 500 hp/ 450 lbs-ft torque at the rear wheels very few transmission failures are noted in the 6HP21.
I think if you beat on it all day long with huge torque gains the transmission will fail but occasional use it is doubtful if the torque and hp bump will cause much concern...

I look forward to my warranty expiring so I can reflash the engine for more significant gains like shown above. I did this with my Superduty (Microchips Superturner) for a mild 60 hp/ 100 lbs-ft gain and had zero issues with the transmission in 179K miles when I sold it.
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Old 09-05-2014, 08:11 PM
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Re: ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2

Quote:
Originally Posted by Trailhawk View Post
Hi Snuke,

That gearbox is the same gearbox that is in the SRT8 with 640nm. Additionally Chrylser has been using that trans in the 300c 5.7 and 6.1's since 2005 where I personally have had plenty enough experience with them in highly modified cars (way more than the rated torque capacity) to be confident the transmission will live a long healthy life.

I appreciate the link update.
They used modified MB trany in those cars. Chrysler start using 8 speed ZF after they separated with MB or to be exact in 2012 in Chrysler 300 and Dodge Charger and in 2013 they introduced it in RAM trucks. MB trany is rated 700 N-m and it was used for a while in AMG cars because 7-G Tronic can't support high torque output.
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Old 09-05-2014, 09:41 PM
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Re: ECU Flash tuning result (Dyno graph with before & after) - CRD 3.0L WK2

Nearly any factory transmission can be built stronger by using higher quality internal parts. I have a 4R100 in my old Superduty that is built to handle over twice the factory rated torque. Factory trannies are built with a cost vs performance design and usually can handle around 20-25% more torque than rated....for a while. My Superduty ate the factory tranny about 30k miles after I tuned it. I towed heavy on stock settings also. I used to see 225°F towing and now my performance rebuild never exceeds 90°F over ambient and I tow with a mild tune. Too bad the factory tranny wasn't built that well in the first place.
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