Hello

I want to know if anyone has the auto 20B trany working in their car and what they needed to do to get it working.

I have skimmed through some posts here and some people mentioned that the 20B trany is similar to the 3.0L trany from the MPV & 929.

I am want to drop a 20B in my 1992 Serenia 929 this winter. I just want to have it in the car and running .... later on i will upgrade the engine and drive train.

Help

 

it can be done but you have to use the stock engine computer with the 20b to
use the auto trani, you can use the stock engine computer and a manual trani
but you cant use the auto trani computer and a after market computer for the engine.
I am sure that someone might be able to get the trani working on its own but i sure wouldn't
bother! also would i do the work again to use the stock computer? no

matt

 

Why can't you use a standalone such as Motec to controll the stock tranny? Is there something special about it? Motec and AEM controll auto trannys. I heard its a PITA to figure out though.

-Destin

 

I just want to get a 20B and slap it the way it is into the 929 ..... i do not have the time, money or expertese to start messing around with stand-alones. All 20Bs come with auto tranies .... 929 also came only with auto tranies. TO get a manula trany, to install the pedals, to mate it properly ... etc etc. Later on yes i want a beefy 6 speed and a single turbo .... but now i just want to drop a 20B and run it in the car back anf forth to work .

 

Are you guys made of money or have all the time in the world?
It's going to take either or both to pull it off...

20B on a stand-alone is proven and maps are readily available.
It doesn't take that long, and I bet I can wire up a Haltech and get a 20B up and running faster than most people can figure out the auto tranny system...


-Ted

 

Stand alone = 1,000$+

 

Are you trying to do a 20B swap on a budget?


-Ted

 

correct

i want it in the car a.s.a.p. and a.c.a.p.

like i said the car it is going into is a 929 and need it on the road soon.




Mine is exactly like that one with factory BBS style alloys and tan leather

Here is what i want to get after the 20B swap

_

I will be happy with 400hp ( intercooler, exhaust, boost+ ) for a bit ... till i have money for a proper trany and engine rebuild / upgrade.

----------------------------------------------

From what i read here the auto trany from the 929 is similar or the same as the 20B one.


Here is what i gathered:


- the engine does not work with the stock ecu and no automatic trany ( has to be moded )
- trany is similar or same as the 929 3.0L trany
- i have the 20B ecu and trany ECU ( no motor yet )

 

You said ACAP. I'm assuming that means as cheap as possible. As cheap as possible and asap, as soon as possible are a bad combination while trying to do a 20b swap into such a car. Good luck.

-Destin

 

why ?

assuming there is noting wrong with the motor al i need is

- 20B ( 2,000$ )
- custom engine / trany mounts or braces ( 1,000$ )
- driveshaft ( 200-300$ )
- wireing / ecu / tany ( 1,000$ )
- intercooler / rad / piping ( 1,000$ )

 

Good luck.


-Ted

 

Umm.....

BA HAA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA


Sorry..


You need to take some time and look through the forum.. using SEARCH and see all the threads about people saying they will put on in cheap.
THEN look up using search all the threads of the people saying they will simply use the stock ECU cause its "Easier and cheaper"

IIRC someone was a engineer or something (Trying to remember Evilaviator telling me about him) who SWORE he could simply make it run on the stock ECU. Then a year later.. maybe a little more he finally had it running sorta properly.. with limited performance.. and then pulled it and went stand alone. I could be mis-informed to the details.. BUT the point of it is.. People with TONS more experience than you (From what you said above) have had a helluva time with the stock ECU and Tranny pipedream.

As Ted said..

Good Luck

 

Oh, is that all? Well, you just need to talk to one of your neighbors and see what he/she did for the conversion. Afterall, there are so many 20B conversions around due to the ease and low cost of the project, that you will have no problem finding somebody locally to help you out. It should only take you an hour or two and maybe $50-100 for the conversion if you have a good pair of pliers and a 14mm wrench. Good luck!

 

why is that such a hard thing to acomplish ?

engine swaps are cheap with any other engine .... what makes this engine and tray so hard to set up and make it run ?

- engine subfrane or mounts
- wirering for the engine and trany
- custom intercooler
- driveshaft

 

Stock ECU SUX.
I guess you didn't get that.
The stock Cosmo ECU has too many fricken inputs that I bet you can't fool all of them.
I question if the Corksport reprogram can take care of all of them.

I typically can handle almost any automotive electrical wiring, but when I saw the schematic, the first words out of my mount is "**** THIS".

We typically go Haltech EMS on our conversions.
I can do them in my sleep.

Sure, prove it to us you can do it.
I'd like to hear any new updates!


-Ted

 

I have only ONE word to say once again with regards to using the stock tranny..

SEARCH


Not trying to be a dick.. but really dude.. do some research on the thing.. and see what there is. There is a lot more to it that you left out in your build. Check Ted's page with a price list for a rough 20B install. It isnt exactly accurate for your 929 conversion.. but you will have to buy the stuff for the 929 not the FD/FC... sooo add money to it cause it doesnt exist. EVERYTHING is going to have to be fabbed.
Fabbed=Money.

You want the stock ECU to work... I would say throw enough money at it and you will... But no-one else with money OR experience has gotten them to work successfully at levels other than "Limp Mode" as far as I remember. And that is JUST the engine.. .Not the tranny.

Search... find out how many ECU's there are in the Cosmo.. and what they all do... and how they interrelate.. What about the Cosmo mufflers? Yes there are plenty of work arounds.. but do you even know about them??


SEARCH

 

In what way is a muffler a problem ?



That is why i am here asking questions ....

 

the exhaust has a solenoid on it to open up the flow at wide open throttle
that one had me stumped for a bit as well but there is a fix for that.

matt

 

Thanks Matt..

Again.... SEARCH... all the things you have no idea about.. and obviously dont want to do the legwork to find out are here in the forum, and in other sites. Unless you decide to start searching for all the things required you will never complete the project.
If you wanna do a 20B. You need to learn to use search. Answers to questions you will never think to ask are there.

If I wanted to build a Rocket.. I wouldnt just tell people on a Rocket forum I am gonna do A, B, C, and fly to space. I would search and do the research. If I say I am gonna try A, B, C and a lot of people tell me to look into it more cause it wont work... Maybe there is a Point there. Maybe you SHOULD look around... and search.

 

Those soleniods are located in a box above the diff centre. The weather gets into them & they rust out giving a "#29" + "#35" fault code before hitting limp mode.. I just simulate them electrically with a 35 Ohm 20W resistor.

As for getting the tranny working correctly.

Not that hard actually, just time consuming. You need the schematics to bypass various inputs & outputs. Many will need pull up resistors & some will need grounding.

Eventually you will get there.

REgards

 

I did not know about the selenoids in the exhaust, i tought it was the same set up as they had in the 929 with valves and springs that opened with increased pressure .... did not know it was selenoid controlled.

Thank you very much ...... thanks for the tip and i am sure i will have many more things to ask for.

Does anyone have a PDF of a 20B work shop manual ?

 

sory i'm not helping you... it's just an other question....

is you find a wiring diagram for the 20 in a downloadable form, let me know about it...

thx in advance!

why are you keeping it automatic? It is very heavy, no?

an other 3rotor comming soon... ( i hope)

 

i asked couple of poeple for some scans ..... no luck tough

i bought the 929 for 600CND
i can get a 20B for around 2,000CND
the trany in the 20B is supposed to be the same as the 929
i just want a 20B in a 929 to cruise on weekends ....

 

I stuck with the stock ECU and it works just fine. I did it for two main reasons:
1. I insisted on running the stock twins sequentially.
2. I wanted the reliabilty and driveability of the stock computer.
Those were MY reasons (flawed or not) and I am not trying to start a debate over those issues.
It is also very important to point out that I had the advantage of harvesting ALL of the needed harnesses and bits and pieces from a front clip that actually turned over. If you are missing any pieces, which is VERY common from the stuff I have seen imported, then you will have one hell of a time making this work. The Cosmo ECU requires a tremendous number of feedback issues in order to work in anything other than Limp or fail safe mode. If it doesn't see spmething it is expecting, then you are not going to get the performance you are expecting.
HOWEVER, even though Corksport was successful in making this a reality for me, it wasn't without a significant amount of trial and error, and it did require a tremendous amount of patience and resourcing information from several very knowledgable sources.
If I were to do it all over again, or if something goes wrong in the future, I am going with a stand alone and a single turbo set-up. The only way to achieve the goal of ASAP and ACAP is going to be by obtaining a complete front clip with engine and dash harness and tranny with all computer attached and functioning.
Otherwise, you are fighting a significant uphill battle.
Just my 2 cents.

 

thanks