The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
A forum for discussing applications and implementations of the MegaShift transmission controller code for the GPIO from B&G. This can control up to 8-speeds and 6 shift solenoids (plus a 16x9 table for controlling a PWM line pressure valve). It has manual and fully automatic modes (16x9 load x speed table), with under and over rev-limit protection, and full data logging of all inputs and outputs (among many other abilities). A TransStim to test your completed board is also available.
nebraska_e28 wrote:Thank you for the useful information Lance, very much appreciated. If a person had a service manual & could identify which wires control each part of the trans, would it be helpful to log voltages on each to gain some understanding of what each circuit is going under a given rpm & load? From there that data could be used to figure how to properly wire the trans up to MS. Just thinking aloud here.
To the OP, didn't mean to strike a nerve! I intended to bring up a dead subject in case there was anyone out there with some new developments, or even someone that's toyed around with this.
I found some ZF docs that seemed pretty good. I'm trying to talk Todd into it.
is of any information.
It´s out of a link: http://www.7-forum.com/forum/5/4hp24-wa ... 690-2.html from a BMW-7series forum where people seem to control the 4HP24 already. Thanks to Nosch for sending the link to me.
I could try to register there to ask for info - if only I knew what to ask for. I have read the "checklist" from Lance, but maybe there is some manual printed by ZF where all this is contained ? Someone wrote he had a wiring diagram in that thread.
(from this website http://www.europeantransmissions.com/Bu ... echlib.htm)
(there are other .pdf´s, I saw one with a description of the pins of the connector from the ZF. And in the Member-area there is a hint to a wiring diagram, if only I had access ...)
Hello , im new to megashift - but am going to take the plunge and try and get the zf4hp24 box to work.. Has anyone got any further with it yet? I have found a few more pages with details in them but nothing substantial yet!
Itssimple wrote:Hello , im new to megashift - but am going to take the plunge and try and get the zf4hp24 box to work.. Has anyone got any further with it yet? I have found a few more pages with details in them but nothing substantial yet!
I have yet to finish this & have most of the controller built. It's been a while since I looked at my notes but IIRC the biggest questions I had unanswered were:
1. When should the torque converter lockup & unlock?
2. At what frequencies should line pressure be modulated?
3. Can the trigger wheel inside the 4hp tranny be used as a speed sensor to MS & if so does some type of conditioning circuit need to be built?
Keep me posted on how things come out for you. This would be a very cool advance for this tranny, especially for those of us already running MegaSquirt for ecu.
If a person had a service manual & could identify which wires control each part of the trans, would it be helpful to log voltages on each to gain some understanding of what each circuit is going under a given rpm & load? From there that data could be used to figure how to properly wire the trans up to MS. Just thinking aloud here.
