Running a 3.62 diff with a DCT

SYT_Shadow · 02-14-2021, 09:08 PM

Quote:

Originally Posted by Alex@Alpine

That doesn't modify the DCT software. The final drive setting in the engine software doesn't really do anything.

I haven't tried it myself, just noticed the option recently

rhyary · 03-13-2021, 07:55 AM

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Alex@Alpine · 03-13-2021, 11:04 AM

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Good luck, hope it works out for you. I did say I would return it to my software if you wish. I never offered to refund you, it has been close to a year you have been running our software.

nicksm3 · 03-14-2021, 07:48 AM

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Good luck man, I pray that it works out

Move Over · 03-20-2021, 05:59 AM

I have epics 3.62 tune, and works very well on downshifts. I'll have it on track this upcoming weekend for testing, and will report back.

So far, the big 3-2 downshift blip that other companies states they were unable to get back in, is working well. I notice no difference than the 3.15 shifting points, albeit I've only had it on some slow street miles as my car is not street legal at the moment. So, not trying to draw attention to myself.

Lienrocs · 03-20-2021, 09:22 AM

Quote:

Originally Posted by Move Over

I have epics 3.62 tune, and works very well on downshifts. I'll have it on track this upcoming weekend for testing, and will report back.

So far, the big 3-2 downshift blip that other companies states they were unable to get back in, is working well. I notice no difference than the 3.15 shifting points, albeit I've only had it on some slow street miles as my car is not street legal at the moment. So, not trying to draw attention to myself.

Same results here.

olzah · 03-22-2021, 04:14 PM

Wait, i did some investigations and now can change:
- default program and mode
- pressure and torque limits
- shift points
- many logic options
- final drive and wheel ratios

Bin-file XDF Description developed mostly for GTS version, but not a problem to modify it for your current software. You will get 0DA file for winkfp tool which flashes in standard way (about 2 mins) by yourself and fully reversible. PM me if interested.

Idfkman · 08-24-2021, 04:46 PM

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Any updates from running the Epic 3.62 tune? Considering getting a 3.62 tune for my car but am not sure whether it’s worth it or not. Car has had a Dinan 3.62 diff for over 100k miles so I don’t even remember if the downshift blips are lacking.

rhyary · 08-24-2021, 05:41 PM

Quote:

Originally Posted by Idfkman

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Any updates from running the Epic 3.62 tune? Considering getting a 3.62 tune for my car but am not sure whether it’s worth it or not. Car has had a Dinan 3.62 diff for over 100k miles so I don’t even remember if the downshift blips are lacking.

Works great on the track.

Idfkman · 08-24-2021, 05:56 PM

Quote:

Originally Posted by rhyary

Quote:

Originally Posted by Idfkman

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Any updates from running the Epic 3.62 tune? Considering getting a 3.62 tune for my car but am not sure whether it's worth it or not. Car has had a Dinan 3.62 diff for over 100k miles so I don't even remember if the downshift blips are lacking.

Works great on the track.

Thats awesome!! Would you say the Epic is a noticeable improvement as compared to Alpine's offering? Debating which option to go with now.

Alex@Alpine · 08-24-2021, 06:37 PM

Quote:

Originally Posted by rhyary

Quote:

Originally Posted by Idfkman

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Any updates from running the Epic 3.62 tune? Considering getting a 3.62 tune for my car but am not sure whether it's worth it or not. Car has had a Dinan 3.62 diff for over 100k miles so I don't even remember if the downshift blips are lacking.

Works great on the track.

I think we are fully done with our 3.62. All the guys testing are happy. I am sure they can chime in. If you like to go back to our update message me

rhyary · 08-25-2021, 05:38 AM

Quote:

Originally Posted by Alex@Alpine

Quote:

Originally Posted by rhyary

Quote:

Originally Posted by Idfkman

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Any updates from running the Epic 3.62 tune? Considering getting a 3.62 tune for my car but am not sure whether it's worth it or not. Car has had a Dinan 3.62 diff for over 100k miles so I don't even remember if the downshift blips are lacking.

Works great on the track.

I think we are fully done with our 3.62. All the guys testing are happy. I am sure they can chime in. If you like to go back to our update message me

Alex,
As I told you, I don't mind trying your 3.62 code again, however, I need to get agreement from Epic to recode the Epic if yours does not work as well. We can take it off line

nicksm3 · 08-25-2021, 07:24 AM

I like where all this is headed but, for me I need more convincing and or seat time in a car with a custom diff with coding that can match the GTS coding in terms of crisp up shifts and blip rev matching downshifts. Otherwise I am going to continue to run my perfect OEM gears and GTS TUNE.

Idfkman · 08-26-2021, 07:56 AM

Quote:

Originally Posted by Alex@Alpine

Quote:

Originally Posted by rhyary

Quote:

Originally Posted by Idfkman

Quote:

Originally Posted by rhyary

I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune.

For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode.

Alas, I did not have the rev match on down shift.

Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune.

Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP.

Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work.

It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.

Any updates from running the Epic 3.62 tune? Considering getting a 3.62 tune for my car but am not sure whether it's worth it or not. Car has had a Dinan 3.62 diff for over 100k miles so I don't even remember if the downshift blips are lacking.

Works great on the track.

I think we are fully done with our 3.62. All the guys testing are happy. I am sure they can chime in. If you like to go back to our update message me

Glad to hear you've received positive feedback. Will be giving your 3.62 tune a try after I finish up some other projects on the car over the next few weeks.

rhyary · 08-26-2021, 10:02 AM

For those on the fence about 3.62.
from personal experience this issue is not a straight forward. I will try to list the factors that contribute to the confusion. First, this is not about the ratio itself. That you have to decide as a separate issue from the shifting.

Track (high rpm)
1. Shifting up - on time or delayed
2. Shifting down - on time, Blipping, blipping timing

Around town (low rpm)
1. Shifting up delays
2. Shifting down quality (slipping the clutches or Formula One)

Consistency
Does it do it the same, or differently given about the same scenario.

In addition to the 3.62 tune, there is the issue of DCT fluid. If you don't have extra 1L (GTS filling) the tune can be confused with starvation, especially coming into T1 at NYST, LRP and PMP.

Given the factors above, it is difficult to get a straight answer and also difficult to give tuners the correct feedback.

So, if you want to go to 3.62 on DCT transmission, you want to optimize gear 6 and 7 in places like PMP and WGI. without 3.62 I don't think anyone is using 7th gear anywhere. At the same time, with 3.62 you hardly use 2nd gear.

If you do decide on 3.62 then the most important factor is for the tune to shift down in a timely matter. The second important factor is to blip and blip correctly as you come to T1 because you don't want to upset the balance of the car as you approach T1.

Hope this helps

nicksm3 · 08-26-2021, 11:11 AM

Quote:

Originally Posted by rhyary

For those on the fence about 3.62.
from personal experience this issue is not a straight forward. I will try to list the factors that contribute to the confusion. First, this is not about the ratio itself. That you have to decide as a separate issue from the shifting.

Track (high rpm)
1. Shifting up - on time or delayed
2. Shifting down - on time, Blipping, blipping timing

Around town (low rpm)
1. Shifting up delays
2. Shifting down quality (slipping the clutches or Formula One)

Consistency
Does it do it the same, or differently given about the same scenario.

In addition to the 3.62 tune, there is the issue of DCT fluid. If you don't have extra 1L (GTS filling) the tune can be confused with starvation, especially coming into T1 at NYST, LRP and PMP.

Given the factors above, it is difficult to get a straight answer and also difficult to give tuners the correct feedback.

So, if you want to go to 3.62 on DCT transmission, you want to optimize gear 6 and 7 in places like PMP and WGI. without 3.62 I don't think anyone is using 7th gear anywhere. At the same time, with 3.62 you hardly use 2nd gear.

If you do decide on 3.62 then the most important factor is for the tune to shift down in a timely matter. The second important factor is to blip and blip correctly as you come to T1 because you don't want to upset the balance of the car as you approach T1.

Hope this helps

OG Shark · 08-26-2021, 07:45 PM

Quote:

Originally Posted by nicksm3

I like where all this is headed but, for me I need more convincing and or seat time in a car with a custom diff with coding that can match the GTS coding in terms of crisp up shifts and blip rev matching downshifts. Otherwise I am going to continue to run my perfect OEM gears and GTS TUNE.

Still working great in my car...

nicksm3 · 08-27-2021, 07:13 AM

Quote:

Originally Posted by OG Shark

Quote:

Originally Posted by nicksm3

I like where all this is headed but, for me I need more convincing and or seat time in a car with a custom diff with coding that can match the GTS coding in terms of crisp up shifts and blip rev matching downshifts. Otherwise I am going to continue to run my perfect OEM gears and GTS TUNE.

Still working great in my car...

Would love to see some recent in car vids

OG Shark · 08-27-2021, 09:25 AM

Quote:

Originally Posted by nicksm3

Would love to see some recent in car vids

Haven't posted a lot of new footage - been more testing than racing lately. Ought to be some one lap stuff in my build thread in the track section though.

nicksm3 · 08-27-2021, 10:39 AM

Quote:

Originally Posted by OG Shark

Quote:

Originally Posted by nicksm3

Would love to see some recent in car vids

Haven't posted a lot of new footage - been more testing than racing lately. Ought to be some one lap stuff in my build thread in the track section though.

I hear ya, can you point me in the direction or GET ON MAKING SOME KIND OF VIDS !!! Lol jk
Man...I've just been dying to get a custom built diff already.

OG Shark · 08-27-2021, 11:04 AM

Quote:

Originally Posted by nicksm3

I hear ya, can you point me in the direction or GET ON MAKING SOME KIND OF VIDS !!! Lol jk
Man...I've just been dying to get a custom built diff already.

We are I promise!

Huge improvement with a good diff! And 3.62 can and has been done properly. Not sure I would do it on a street/track hybrid - but for a dedicated track car to me it is a no brainer. Would rev too high for my tastes on the highway in a street car.

Links to a couple of the latest vids (assuming I didn't botch it...)

https://www.m3post.com/forums/showpo...&postcount=419
https://www.m3post.com/forums/showpo...&postcount=418

nicksm3 · 08-27-2021, 12:10 PM

Beautiful driving!
Ok reviewing your videos, car sounds epic and looks plated

Ok now to what my issue is...I see and hear some delay..but also on your Gear Indicator that's in-front of you. That would drive me nuts.

03-13-2021, 07:55 AM	#156
rhyary Banned 1637 Rep 2,883 Posts Drives: 2013 M3 Join Date: May 2015 Location: Albany, NY iTrader: (0)	I decided that for 2021 I am going to tune my DCT with Epic 3.62 Tune. For 2020 I was driving with Alpine's DCT 3.62 tune and the car was great. Upshift were crisp F1 style, No missed shifts and no limp mode. Alas, I did not have the rev match on down shift. Per SYT_Shadow and nicksm3 recommendation I contacted Randy from Epic and bought his tune. Cable should arrive Tue and I will schedule a tune session with Epic Wed or Thu. Friday testing and Sat my first 2021 trackday at LRP. Alex from Alpine was kind enough to offer retuning the car with his software if Epic's does not work, and also offered to refund the money if Epic does work. It is essential and very reassuring to know that the vendors that support us also stands by their solutions. It has to be a two way street for this symbiotic relationship to work.
	Appreciate 0 Quote

03-20-2021, 05:59 AM	#159
Move Over Colonel 1316 Rep 2,496 Posts Drives: M3 6MT Join Date: May 2015 Location: Peninsula iTrader: (9)	I have epics 3.62 tune, and works very well on downshifts. I'll have it on track this upcoming weekend for testing, and will report back. So far, the big 3-2 downshift blip that other companies states they were unable to get back in, is working well. I notice no difference than the 3.15 shifting points, albeit I've only had it on some slow street miles as my car is not street legal at the moment. So, not trying to draw attention to myself. __________________ 2010 E92 M3 DCT
	Appreciate 2 Lienrocs841.00 DrFerry10035.50 Quote

03-22-2021, 04:14 PM	#161
olzah Registered 0 Rep 2 Posts Drives: E82 135 DCT Join Date: May 2005 Location: Home iTrader: (0)	Wait, i did some investigations and now can change: - default program and mode - pressure and torque limits - shift points - many logic options - final drive and wheel ratios Bin-file XDF Description developed mostly for GTS version, but not a problem to modify it for your current software. You will get 0DA file for winkfp tool which flashes in standard way (about 2 mins) by yourself and fully reversible. PM me if interested. Last edited by olzah; 03-22-2021 at 04:32 PM..
	Appreciate 0 Quote

08-25-2021, 07:24 AM	#167
nicksm3 Colonel 1075 Rep 2,537 Posts Drives: e92 m3 Competition Join Date: Jun 2014 Location: Westchester NY iTrader: (6)	I like where all this is headed but, for me I need more convincing and or seat time in a car with a custom diff with coding that can match the GTS coding in terms of crisp up shifts and blip rev matching downshifts. Otherwise I am going to continue to run my perfect OEM gears and GTS TUNE.
	Appreciate 0 Quote

08-26-2021, 10:02 AM	#169
rhyary Banned 1637 Rep 2,883 Posts Drives: 2013 M3 Join Date: May 2015 Location: Albany, NY iTrader: (0)	For those on the fence about 3.62. from personal experience this issue is not a straight forward. I will try to list the factors that contribute to the confusion. First, this is not about the ratio itself. That you have to decide as a separate issue from the shifting. Track (high rpm) 1. Shifting up - on time or delayed 2. Shifting down - on time, Blipping, blipping timing Around town (low rpm) 1. Shifting up delays 2. Shifting down quality (slipping the clutches or Formula One) Consistency Does it do it the same, or differently given about the same scenario. In addition to the 3.62 tune, there is the issue of DCT fluid. If you don't have extra 1L (GTS filling) the tune can be confused with starvation, especially coming into T1 at NYST, LRP and PMP. Given the factors above, it is difficult to get a straight answer and also difficult to give tuners the correct feedback. So, if you want to go to 3.62 on DCT transmission, you want to optimize gear 6 and 7 in places like PMP and WGI. without 3.62 I don't think anyone is using 7th gear anywhere. At the same time, with 3.62 you hardly use 2nd gear. If you do decide on 3.62 then the most important factor is for the tune to shift down in a timely matter. The second important factor is to blip and blip correctly as you come to T1 because you don't want to upset the balance of the car as you approach T1. Hope this helps
	Appreciate 1 Idfkman477.50 Quote

08-27-2021, 12:10 PM	#176
nicksm3 Colonel 1075 Rep 2,537 Posts Drives: e92 m3 Competition Join Date: Jun 2014 Location: Westchester NY iTrader: (6)	Beautiful driving! Ok reviewing your videos, car sounds epic and looks plated Ok now to what my issue is...I see and hear some delay..but also on your Gear Indicator that's in-front of you. That would drive me nuts.
	Appreciate 0 Quote