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2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

Thread: HPP is Now CTT Tuning Reply to Thread
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  Topic Review (Newest First)
Yesterday 04:18 PM
Aaron37
Quote:
Originally Posted by 2013Cummins6.7L View Post
Zedman, thanks for your experience, sounds like I will probably not be going the Motor Ops route. Anyway curious with the trans tunes, looks like CTT offers the 3.2 version tune where HPP offered the 2.1 version tune. Some people are happier with the 2.1 tune vs the 3.2 tune. Does anyone know if you can still get that 2.1 tune from CTT even though it was an original HPP tune?
Yep, you can still get the 2.1 tune. Just send them a revision request asking for 2.1.
Yesterday 03:54 PM
2013Cummins6.7L Zedman, thanks for your experience, sounds like I will probably not be going the Motor Ops route. Anyway curious with the trans tunes, looks like CTT offers the 3.2 version tune where HPP offered the 2.1 version tune. Some people are happier with the 2.1 tune vs the 3.2 tune. Does anyone know if you can still get that 2.1 tune from CTT even though it was an original HPP tune?
Yesterday 12:56 PM
zedman
Quote:
Originally Posted by 2013Cummins6.7L View Post
Hi,

I am new to this forum. I have a stock 2013 Ram 2500 Tradesman 6.7L w/ 68RFE. I am currently deleting the truck but can't decide on which tuning company to go with. I want EFI Live and I am very interested in CTT. Looks like everyone seems to be very happy with CTT so far since they have switched over from HPP. I am also considering going with Motor Ops. Anyone have experience with both?

Also looks like there is some controversy with the trans tuning from CTT. Are the trans tunes still very good for just a stock trans rather than a built trans? Thanks for everyone's input in advance.
I originally went with motor ops and had a terrible experience with them. I asked for changes in the trans tune and at one point it sounded like the tranny fell out. I actually ended up going with ctt and am wayyyy happier!

https://www.cumminsforum.com/#/topics/2440986
Yesterday 12:10 PM
2013Cummins6.7L Hi,

I am new to this forum. I have a stock 2013 Ram 2500 Tradesman 6.7L w/ 68RFE. I am currently deleting the truck but can't decide on which tuning company to go with. I want EFI Live and I am very interested in CTT. Looks like everyone seems to be very happy with CTT so far since they have switched over from HPP. I am also considering going with Motor Ops. Anyone have experience with both?

Also looks like there is some controversy with the trans tuning from CTT. Are the trans tunes still very good for just a stock trans rather than a built trans? Thanks for everyone's input in advance.
10-08-2019 02:59 PM
Wowegner
Quote:
Originally Posted by Aaron37 View Post
The engine tuning on 2.1E idles better and has more power in each tune. The 3.x tunes there was no difference in power it seemed like. The 2.1 tow tune has more power than the performance tune on the 3.x tunes. I also netted better fuel economy (hand calculated) on the 2.1 tune. The 2.1 tune also warms up faster in colder weather and has lower egt's when towing. The 3.x tunes have slightly less injector rattle at highway speeds though. Both the 2.1 and 3.x tunes aren't smoky on my truck. Throttle response is much better on 2.1 and builds boost faster. 2.1 is slightly quieter overall except the exhaust brake is a bit louder.

Trans tuning overall I prefer the 2.1 tune. 2.1 doesn't shift to 3rd gear as quick, has earlier lockup in 3rd and lockup is smoother in general except when under 10% throttle. It's still very smooth but the 3.4.1 tune I had you couldn't even feel the lockup when at that throttle, I think it was due to it locking up 5km/h later. The 3rd lock to 4th gear shift is better in 2.1 except for around 35-40% throttle and it's not bad, it just shifts a bit sooner than the 3.x tunes and not quite as smooth. 4th to 5th is no comparison, the 2.1 tune is always smooth in that shift where as 3.x tunes had quite the jerk to the shift unless under 15% throttle, then it was buttery smooth. The 3.x tunes hold on to each gear a lot longer than 2.1. It was the extremely harsh 5-4 downshift in the 3.x tunes that made me switch back to 2.1. It would downshift so harsh and make such a loud bang that it made me cringe and wonder if my trans would still be attached to the truck. Sometimes it would shift nice and sometimes it would be rough but when coasting up a hill it would bang and be harsh 100% of the time (even after 3000km's on the tune). I've put about 10,000km's on the 3.x tunes total. The 2.1 5-4 downshift is always smooth after the trans drive learn is done. The 5-4 downshift on 3.x tunes would also make an audible "click" sound. The shift quality also seemed to change sporadically with the 3.x tunes up and downshifts. Sometimes it would be good and other times it would be lousy and that was from stop light to stop light. It shifted better when the trans was cold too. Once up to temp the shifts got harsher(not harsh though). 2.1 allows you to roll on the throttle at highway speeds to pass and not downshift unless very quick to press the accelerator pedal where as 3.x tunes would downshift to 4th with minimal throttle input. Even trying to maintain 110km/h up a slight incline would trigger a downshift unless cruise control was used, then you could climb a 10% grade and accelerate from 100km/h to 110 in 6th gear very quickly without it downshifting. 5th to 6th gear shift is the same for both other than 3.x tunes shift to 6th sooner under low throttle and much later when 40% throttle or more. 2.1 doesn't gear hunt like 3.x tunes did for me between 4th and 5th and 5th and 6th.

Tow haul mode 2.1 shifts to each gear sooner than 3.x. The 3.4.1 tune in particular would rev to 2800rpm even at 40% throttle with my 9000lbs enclosed trailer. I hated it. Even not using tow haul it would rev to 2500rpm at fairly low throttle. 2.1 shifts at 2000rpm unless over 50% throttle, then it holds the gears longer. Upshift quality in tow haul is pretty similar, I might give the edge to the 3.x tunes though. The 3.4.1 tune wouldn't downshift when on the brakes or going down a steep grade unless it hit where the tc would unlock, then it downshifts on it's own. 2.1 if you are on the brakes it downshifts quicker in order to utilize the EB to aid in slowing down. The shift strategy is better with 2.1. The exhaust brake is definitely stronger on the 2.1 tunes and the tc stays locked down to lower rpm. Downshifts are more aggressive on 2.1 in tow haul mode, some people might not like it. They aren't harsh just faster and the exhaust brake doesn't slowly ramp up, it's just full strength as soon as your in the gear lower.

I haven't been getting the shift chirp on 2.1 on the tow tune from 3-4 at 35% throttle. I had it a bit on the performance tune but I know for a fact that this built trans has noisier clutch packs compared to stock as far as the chirp is concerned. The 3.x tunes I never heard the chirp once.

Man, that built trans must really affect the shift points/feeling of the shifts. The 3.3V I am running is great except for the "harsher" 3rd lock, but that's obviously due to it locking sooner than stock. Other than that, all my shifts are smooth. One thing I can agree on, is that 3.3V seems to be quieter when cold.
10-08-2019 02:17 PM
Aaron37 The engine tuning on 2.1E idles better and has more power in each tune. The 3.x tunes there was no difference in power it seemed like. The 2.1 tow tune has more power than the performance tune on the 3.x tunes. I also netted better fuel economy (hand calculated) on the 2.1 tune. The 2.1 tune also warms up faster in colder weather and has lower egt's when towing. The 3.x tunes have slightly less injector rattle at highway speeds though. Both the 2.1 and 3.x tunes aren't smoky on my truck. Throttle response is much better on 2.1 and builds boost faster. 2.1 is slightly quieter overall except the exhaust brake is a bit louder.

Trans tuning overall I prefer the 2.1 tune. 2.1 doesn't shift to 3rd gear as quick, has earlier lockup in 3rd and lockup is smoother in general except when under 10% throttle. It's still very smooth but the 3.4.1 tune I had you couldn't even feel the lockup when at that throttle, I think it was due to it locking up 5km/h later. The 3rd lock to 4th gear shift is better in 2.1 except for around 35-40% throttle and it's not bad, it just shifts a bit sooner than the 3.x tunes and not quite as smooth. 4th to 5th is no comparison, the 2.1 tune is always smooth in that shift where as 3.x tunes had quite the jerk to the shift unless under 15% throttle, then it was buttery smooth. The 3.x tunes hold on to each gear a lot longer than 2.1. It was the extremely harsh 5-4 downshift in the 3.x tunes that made me switch back to 2.1. It would downshift so harsh and make such a loud bang that it made me cringe and wonder if my trans would still be attached to the truck. Sometimes it would shift nice and sometimes it would be rough but when coasting up a hill it would bang and be harsh 100% of the time (even after 3000km's on the tune). I've put about 10,000km's on the 3.x tunes total. The 2.1 5-4 downshift is always smooth after the trans drive learn is done. The 5-4 downshift on 3.x tunes would also make an audible "click" sound. The shift quality also seemed to change sporadically with the 3.x tunes up and downshifts. Sometimes it would be good and other times it would be lousy and that was from stop light to stop light. It shifted better when the trans was cold too. Once up to temp the shifts got harsher(not harsh though). 2.1 allows you to roll on the throttle at highway speeds to pass and not downshift unless very quick to press the accelerator pedal where as 3.x tunes would downshift to 4th with minimal throttle input. Even trying to maintain 110km/h up a slight incline would trigger a downshift unless cruise control was used, then you could climb a 10% grade and accelerate from 100km/h to 110 in 6th gear very quickly without it downshifting. 5th to 6th gear shift is the same for both other than 3.x tunes shift to 6th sooner under low throttle and much later when 40% throttle or more. 2.1 doesn't gear hunt like 3.x tunes did for me between 4th and 5th and 5th and 6th.

Tow haul mode 2.1 shifts to each gear sooner than 3.x. The 3.4.1 tune in particular would rev to 2800rpm even at 40% throttle with my 9000lbs enclosed trailer. I hated it. Even not using tow haul it would rev to 2500rpm at fairly low throttle. 2.1 shifts at 2000rpm unless over 50% throttle, then it holds the gears longer. Upshift quality in tow haul is pretty similar, I might give the edge to the 3.x tunes though. The 3.4.1 tune wouldn't downshift when on the brakes or going down a steep grade unless it hit where the tc would unlock, then it downshifts on it's own. 2.1 if you are on the brakes it downshifts quicker in order to utilize the EB to aid in slowing down. The shift strategy is better with 2.1. The exhaust brake is definitely stronger on the 2.1 tunes and the tc stays locked down to lower rpm. Downshifts are more aggressive on 2.1 in tow haul mode, some people might not like it. They aren't harsh just faster and the exhaust brake doesn't slowly ramp up, it's just full strength as soon as your in the gear lower.

I haven't been getting the shift chirp on 2.1 on the tow tune from 3-4 at 35% throttle. I had it a bit on the performance tune but I know for a fact that this built trans has noisier clutch packs compared to stock as far as the chirp is concerned. The 3.x tunes I never heard the chirp once.
10-08-2019 12:55 PM
Wowegner I know one of them said it was the engine tuning they didn't prefer (Too Smokey).
10-08-2019 12:51 PM
RamHunter18 Both since your in a similar situation.
10-07-2019 09:08 PM
Aaron37
Quote:
Originally Posted by RamHunter18 View Post
Are you not liking the engine or the trans tune in the 3.2....? Which 2.1 version are you running? Lbf?
Were you asking me or A.carlisle16?
10-07-2019 03:39 PM
RamHunter18 Are you not liking the engine or the trans tune in the 3.2....? Which 2.1 version are you running? Lbf?
10-07-2019 03:06 PM
A.carlisle16 I have switched back to the 2.1 from the 3.2. Seems to be a better tune imo.
10-07-2019 02:03 PM
Aaron37
Quote:
Originally Posted by Rar4 View Post
i have the last tune update from HPP (2.1 i Believe no shift flares). Is it worth updating to CTT's latest?
Not imo. I have had probably around 10 or so variants of 3.2, 3.3, 333, 3.4.1, etc. And am now back on 2.1. Lol. You're more than welcome to try them if you'd like, you can always switch back.
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