Megashift Trans Controller, Controlling Boxster/996 Tiptronic Boxes? |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Megashift Trans Controller, Controlling Boxster/996 Tiptronic Boxes? |
Chris H. |
Mar 20 2017, 08:20 AM
Post
#1
|
Senior Member Group: Members Posts: 4,027 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest |
Hey All,
I'm working on a solution for a certain large, square German vehicle and wanted to bounce this off of the electronics gurus. Might also be helpful down the road for those who might want to do a tiptronic Boxster trans in their 914s. So...the challenge for me is that there are only a couple of automatic transmissions that are pointed in the right direction to use in the Vanagon and only one that can handle more than ~150 hp for a significant period of time. That would be the 911 tiptronic. My initial thought was to use a 964/993 trans which does not have a key driven immobilizer. Looking through the wiring diagrams I THINK I can figure out a way to run it with the stock TCU. But then I found the Megashift trans controller: Megashift! IF (big if) I am reading the directions right, it appears you need the shift solenoid configuration (probably more stuff too), and then it should be fairly easy to control. So the questions are: 1. How easy/hard do you think this would be? Seems like you program the solenoid shift config for each gear, kick down, a few other settings like idle increase, etc? 2. Since the security logic for the immobilizer is not associated with the trans itself, do you think this fully bypasses the immobilizer? Seems like it but I know very little about the tiptronic box. 3. Is there another stock automatic TCU from a VW or Audi that could be adapted to run this? EDIT: The Passat TCU MIGHT WORK. Same trans model #...ZF5HP19... (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif) If we can make this work it could be a great thing for those wanting/needing an automatic solution. I'll give it a shot if the feedback is good. |
Chris H. |
Mar 21 2017, 09:16 AM
Post
#2
|
Senior Member Group: Members Posts: 4,027 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest |
Great feedback. I figured you would jump in when I said "1.8t" Andrew! Really leaning towards the Mercedes 996 trans. I want an auto but a used Vanagon trans just is not strong enough for 220ish HP. They were not designed for that much HP, so I wouldn't expect them to. A very well rebuilt Vanagon trans is $2300 exchange, so more like $3500 to my door. I can get a later 996 trans for ~$1500, plus that plug and play controller ($700), a shifter (couple hundred), longer cable ($50ish), I'm in the $2500 range after I break a couple things for a trans that is more versatile.
On the ECU there are a few references on The Samba for how to defeat the ECU and delete the codes I don't need. Sounds like your guy is similar. The AEB is the easiest to install wiring-wise, it just has slightly lower stock HP and a taller intake so it doesn't fit as well as the later 1.8t. Easily tuned as you know. It has no immobilizer as far as I know. The later one fits like a glove in the engine bay like it was designed to go there. I like Falcor's idea of using an early ECU! Wonder if the intakes are exchange-able (IMG:style_emoticons/default/idea.gif) . My brain is totally exhausted. |
Andyrew |
Mar 21 2017, 10:27 AM
Post
#3
|
Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Great feedback. I figured you would jump in when I said "1.8t" Andrew! Really leaning towards the Mercedes 996 trans. I want an auto but a used Vanagon trans just is not strong enough for 220ish HP. They were not designed for that much HP, so I wouldn't expect them to. A very well rebuilt Vanagon trans is $2300 exchange, so more like $3500 to my door. I can get a later 996 trans for ~$1500, plus that plug and play controller ($700), a shifter (couple hundred), longer cable ($50ish), I'm in the $2500 range after I break a couple things for a trans that is more versatile. On the ECU there are a few references on The Samba for how to defeat the ECU and delete the codes I don't need. Sounds like your guy is similar. The AEB is the easiest to install wiring-wise, it just has slightly lower stock HP and a taller intake so it doesn't fit as well as the later 1.8t. Easily tuned as you know. It has no immobilizer as far as I know. The later one fits like a glove in the engine bay like it was designed to go there. I like Falcor's idea of using an early ECU! Wonder if the intakes are exchange-able (IMG:style_emoticons/default/idea.gif) . My brain is totally exhausted. Intake manifolds are essentially the same externally, internally the early ones have larger ports (as does the heads). They can be swapped year to year. I have an AEB motor with AWM wiring for better tuning. |
Lo-Fi Version | Time is now: 20th April 2024 - 03:10 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |