Steptronic retrofitting
05-07-2007, 07:09 AM
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Just one month ago I installed a paddle shift system on a M5 steering wheel on my car.
I am really delighted with the change. Now I can use most of the car?s potential, by choosing the rpm range for every shift with no compromise.
There is only a small "but". The reaction time is a bit too much.
Some friend has told me about the existence of a retrofit alternative box interface for the Steptronic gearbox, which seems to be able to reduce shifting times by about 40%!
I would be very much interested in this possibility. Should any of you know something about this device I beg you to advise me!
Thanks from Spain
I am really delighted with the change. Now I can use most of the car?s potential, by choosing the rpm range for every shift with no compromise.
There is only a small "but". The reaction time is a bit too much.
Some friend has told me about the existence of a retrofit alternative box interface for the Steptronic gearbox, which seems to be able to reduce shifting times by about 40%!
I would be very much interested in this possibility. Should any of you know something about this device I beg you to advise me!
Thanks from Spain
05-07-2007, 11:16 AM
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Originally Posted by inmediate' post='421846' date='May 7 2007, 04:09 PM
Some friend has told me about the existence of a retrofit alternative box interface for the Steptronic gearbox, which seems to be able to reduce shifting times by about 40%!
I would be very much interested in this possibility. Should any of you know something about this device I beg you to advise me!
I would be very much interested in this possibility. Should any of you know something about this device I beg you to advise me!
05-07-2007, 11:19 AM
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My Ride: BMW 545iA Black Sapphire
Model Year: 2005
Engine: 545i
Originally Posted by colejl' post='421956' date='May 7 2007, 09:16 PM
Sounds like this is referring to the new steptronic gearbox - not sure of a retrofit but it would be expensive either way!
05-07-2007, 12:26 PM
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Originally Posted by andy545' post='421959' date='May 7 2007, 02:19 PM
yep, between 4-5000euros...
05-07-2007, 12:33 PM
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Originally Posted by colejl' post='421956' date='May 7 2007, 02:16 PM
Sounds like this is referring to the new steptronic gearbox - not sure of a retrofit but it would be expensive either way!
05-07-2007, 01:14 PM
#7
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It might be true for manual mode. What I'm thinking is just a simple comparator or buffer placing between shifter and EGS. When EGS see the slow falling edge of the EGS_UP or EGS_DN signal, it shifts up and down accordingly.
EGS_UP/DN falling edge might be slow, so a high-speed buffer would help. Whenever it senses a falling edge of EGS_UP/DN, it'll trigger the output right away, and this might cut some propagation time.
EGS_UP/DN falling edge might be slow, so a high-speed buffer would help. Whenever it senses a falling edge of EGS_UP/DN, it'll trigger the output right away, and this might cut some propagation time.
05-07-2007, 01:21 PM
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Originally Posted by my530i' post='422012' date='May 7 2007, 04:14 PM
It might be true for manual mode. What I'm thinking is just a simple comparator or buffer placing between shifter and EGS. When EGS see the slow falling edge of the EGS_UP or EGS_DN signal, it shifts up and down accordingly.
EGS_UP/DN falling edge might be slow, so a high-speed buffer would help. Whenever it senses a falling edge of EGS_UP/DN, it'll trigger the output right away, and this might cut some propagation time.
EGS_UP/DN falling edge might be slow, so a high-speed buffer would help. Whenever it senses a falling edge of EGS_UP/DN, it'll trigger the output right away, and this might cut some propagation time.
Could you help me on this issue?
Although not in California but in Vietnam
!!!Kind regards
05-07-2007, 01:43 PM
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I was just my guess. But to solidify it, we must have an oscilloscope to measure fall time of EGS_UP/DN signal. If it takes, 1s to fall from 90% of VCC to 10% of VCC, we might need to search for some high-edge rate buffer to reduce fall time from 500ms or so.
However, I'm not sure about EGS module propapagation time. That might be the most important factor? I guess.
Right now, I don't have an oscilloscope, so I cannot do anything
Let me do some research and get back to you. It's a very interesting problem, but, you know what, we can hardly beat BMW engineer in this department.
However, I'm not sure about EGS module propapagation time. That might be the most important factor? I guess.
Right now, I don't have an oscilloscope, so I cannot do anything
Let me do some research and get back to you. It's a very interesting problem, but, you know what, we can hardly beat BMW engineer in this department.
05-07-2007, 01:54 PM
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Originally Posted by my530i' post='422024' date='May 7 2007, 04:43 PM
I was just my guess. But to solidify it, we must have an oscilloscope to measure fall time of EGS_UP/DN signal. If it takes, 1s to fall from 90% of VCC to 10% of VCC, we might need to search for some high-edge rate buffer to reduce fall time from 500ms or so.
However, I'm not sure about EGS module propapagation time. That might be the most important factor? I guess.
Right now, I don't have an oscilloscope, so I cannot do anything
Let me do some research and get back to you. It's a very interesting problem, but, you know what, we can hardly beat BMW engineer in this department.
However, I'm not sure about EGS module propapagation time. That might be the most important factor? I guess.
Right now, I don't have an oscilloscope, so I cannot do anything
Let me do some research and get back to you. It's a very interesting problem, but, you know what, we can hardly beat BMW engineer in this department.
I will await for your comments My 530i.
Thank you so much
Cheers