Which tuner to go for Cobb tune (N54)?
- Thread starter Lexus SC
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Calvin West
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
This one is super mod thread!
This one is super mod thread!
Red_Bean_Bun
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
You mean like change clutch ?
Jason8822;1113370 said:
You mean like change clutch ?
Red_Bean_Bun
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
You mean like change clutch ?
Jason8822;1113370 said:
You mean like change clutch ?
Jason8822
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
Yes, like clutch pack, bearing, etc ?
The 8spd ZF 8HP45 in F series cars is supposingly able to handle 450nm with some tolerance, I wonder how does it live with tuned N55 developing in excess of 500nm ?
N54 is likely matched with 6HP28 which is rated for 600nm so I guess that is not an issue.
Yes, like clutch pack, bearing, etc ?
The 8spd ZF 8HP45 in F series cars is supposingly able to handle 450nm with some tolerance, I wonder how does it live with tuned N55 developing in excess of 500nm ?
N54 is likely matched with 6HP28 which is rated for 600nm so I guess that is not an issue.
Re: Which tuner to go for Cobb tune (N54)?
Jason ... My car FBO with stock turbo is generating 660 nm and pro tune locally and our DCT can handles 750nm without issues.
with further addons ie turbos, methanol, fuels ... the cultch plates have to be changed. ie ssp/dodson.
Just waiting for a TCU flash to be developed for our n55 335 only ...
Jason8822;1113395 said:
Jason ... My car FBO with stock turbo is generating 660 nm and pro tune locally and our DCT can handles 750nm without issues.
with further addons ie turbos, methanol, fuels ... the cultch plates have to be changed. ie ssp/dodson.
Just waiting for a TCU flash to be developed for our n55 335 only ...
Red_Bean_Bun
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
You mean a TCU flash after replacing clutches ?
I'll check if I have something for you ....
You mean a TCU flash after replacing clutches ?
I'll check if I have something for you ....
SUPAN;1113441 said:
Jason8822
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
I think DCT only appears in late batch E9x 335 (i might be wrong)
Not sure which model of the 7DCT is 335 using, but likely 7DCI700 rated at 700nm
PowerShift | GETRAG
F30 335 should be running on 8spd torque converter
Was told that F gen cars from 320 to 335 using 8HP45 rated at 450nm (recently upgraded to 500nm) , thus my concern here
Cars | 8-Speed Automatic Transmission - ZF Friedrichshafen AG
ZF 8HP transmission - Wikipedia, the free encyclopedia
That means 7DCT need to upgrade clutch pack when torque goes above 700nm or so
And i really wonder what is there to be done for 8spd when torque goes above 500nm.
SUPAN;1113441 said:
I think DCT only appears in late batch E9x 335 (i might be wrong)
Not sure which model of the 7DCT is 335 using, but likely 7DCI700 rated at 700nm
PowerShift | GETRAG
F30 335 should be running on 8spd torque converter
Was told that F gen cars from 320 to 335 using 8HP45 rated at 450nm (recently upgraded to 500nm) , thus my concern here
Cars | 8-Speed Automatic Transmission - ZF Friedrichshafen AG
ZF 8HP transmission - Wikipedia, the free encyclopedia
That means 7DCT need to upgrade clutch pack when torque goes above 700nm or so
And i really wonder what is there to be done for 8spd when torque goes above 500nm.
Red_Bean_Bun
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
A couple of things - just some thoughts
To stress the gearbox until it hits max torque limits - you have to lock the wheels all in place and rev all the way to build torque stress. E.g no one does launch control at 3.9k rpm on a BMW ......
Torque peak limits and published outputs are 2 different ratings because we do not know the limit multiple used.
What BMW labels as 6hp19d is mapped as 6hp28 from ZF. There's a huge difference in torque ratings which is confusing people.
There is a torque limit set on gearboxes to protect it. So tuners are always trying to play with that limit. There is also a clutch engagement curve that is being modified as well.
A couple of things - just some thoughts
To stress the gearbox until it hits max torque limits - you have to lock the wheels all in place and rev all the way to build torque stress. E.g no one does launch control at 3.9k rpm on a BMW ......
Torque peak limits and published outputs are 2 different ratings because we do not know the limit multiple used.
What BMW labels as 6hp19d is mapped as 6hp28 from ZF. There's a huge difference in torque ratings which is confusing people.
There is a torque limit set on gearboxes to protect it. So tuners are always trying to play with that limit. There is also a clutch engagement curve that is being modified as well.
Jason8822;1113457 said:
Re: Which tuner to go for Cobb tune (N54)?
At this moment there is none.
What's m4 gear box? What n54 6 speed gearbox?
I believe Bmw gearbox is up to standard unless abuse or overheating.
Dct is strong but at 70k I do feel occasional slip. This should not be the case but we have to re educate how to use the gearbox.
Ie ... if we are always 3/4 throttle, it is best to turn on sports or steptronic mode... the usual drive mode is not correct....
I will embark a full chamge of racing clutch n then a Dct oil cooler.
A fine tune on TCU readaption.
Usual servicing of gearbox is essential as well.
Red_Bean_Bun;1113445 said:
At this moment there is none.
What's m4 gear box? What n54 6 speed gearbox?
I believe Bmw gearbox is up to standard unless abuse or overheating.
Dct is strong but at 70k I do feel occasional slip. This should not be the case but we have to re educate how to use the gearbox.
Ie ... if we are always 3/4 throttle, it is best to turn on sports or steptronic mode... the usual drive mode is not correct....
I will embark a full chamge of racing clutch n then a Dct oil cooler.
A fine tune on TCU readaption.
Usual servicing of gearbox is essential as well.
Red_Bean_Bun
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
I am referring to the tcu software ..... We could try write something. Diff from high level adaptations.....
I am referring to the tcu software ..... We could try write something. Diff from high level adaptations.....
SUPAN;1113563 said:
Red_Bean_Bun
Well-Known Member
Re: Which tuner to go for Cobb tune (N54)?
With your new clutch plates .... Torque limits new specs expected ? Let me know ...
With your new clutch plates .... Torque limits new specs expected ? Let me know ...
SUPAN;1113614 said:
Re: Which tuner to go for Cobb tune (N54)?
Some newbie questions:
At the start I am stuck already:
I don't even know which map corresponds to my ecu ley... Haha.
I am a N54 335i.
(Ok managed to google the answer - gotta plug the AP into my ecu to know which is my ecu)
Also, what is the diff between Stage 1 and Stage 2 maps? Let's say I have aftermarket downpipes in my car, and that's about it...
(Ok managed to google the answer - For Stage 2, catless dp is a must...)
Thanks.
Some newbie questions:
At the start I am stuck already:
I don't even know which map corresponds to my ecu ley... Haha.
I am a N54 335i.
(Ok managed to google the answer - gotta plug the AP into my ecu to know which is my ecu)
Also, what is the diff between Stage 1 and Stage 2 maps? Let's say I have aftermarket downpipes in my car, and that's about it...
(Ok managed to google the answer - For Stage 2, catless dp is a must...)
Thanks.
Last edited by a moderator:
gerald7326
Active Member
Re: Which tuner to go for Cobb tune (N54)?
Ron 98 is octane 93
Lexus SC;1113876 said:
Ron 98 is octane 93
gerald7326
Active Member
Re: Which tuner to go for Cobb tune (N54)?
No bro. Its abit lower. I had prob when i use it. will misfire when full throttle.
But i was using ptf tune with 93octane. Now i have another map for ron 97. In case i go msia
Lexus SC;1113879 said:
No bro. Its abit lower. I had prob when i use it. will misfire when full throttle.
But i was using ptf tune with 93octane. Now i have another map for ron 97. In case i go msia
