There are only 3 ready-made products that I know of to help with the 20B conversion:
1. K2RD Engine Mounts
2. Racing Beat Exhaust Flange (for custom turbos)
3. Pettit FD Subframe

Everything else is on you. Please note that the 20B conversion is not a bolt-on kit, but rather an extensive custom transformation.

Now that you have read that, if you want to make a kit which allows the use of a Cosmo harness in an FD, then please go ahead and make it. Note that nobody in America has bothered to figure out how to get the stock harness to work without the stock Cosmo AT, so you will be the first there, too.

If you look at the top right corner of your screen, you will see a Search button. Click on this, and search this 20B forum for the word "harness". It is amazing what you can learn when you search.

 

Not for an FD!


-Ted

 

Oh yeah, I guess I should have specified that for the sake of the newbies. Thanks.

 

If you can get the 20B installed in a day, you should be able to figure out the harness without a problem.

No adapters available.

But where there is a will, there is a way. It would be easier with an entire front clip from a Cosmo, then you could figure out what is what.

Someone on the forum is using the Cosmo ECU, you'll have to look through the posts, he has talked about it before. He could probably help you.

Also, try talking to some of hte Aussies. One of them might have access to a Cosmo manual that could help.

 

Oh, I'm sorry that RETed and I aren't quite up to your level when it comes to things like this. You can ask around to see where to get a Large PEN-1s Harness for your PU-55y, which will allow for a plug & play engine harness conversion. Check at http://www.painlessperformance.com/ and http://www.cinch.com/ . I think that Nopi has a bunch of different 20B wiring kits in stock, and you may also want to check out all the different 20B FD kits and accessories offered by JC Whitney. Good luck.

 

Mine isn't as "detailed" as Evil Aviator's, but I do charge $500 for Haltech installs.&nbsp Sure, give me $500, and I'll tell you what wires go where and any electrical questions you've got...



-Ted

 

Evil and Ted are cool.

 

cdubsw5 ,,, there in no point in converting the 20b harness
to anything other than what it is,,, there is no
point in trying to connect the 20b wiring to the fd computer
because there is no way that the fd computer
will run any more than a 13b.
13b= 2 rotors
20b= 3 rotors
the fd computer is kind of short the ability to run that
extra rotor,,, unless there is something i don't know about.

matt

 

ok,,, this is what i have done,, but put the motor and wiring into a fc,,,
it took me a long time to reduce the wiring to just what's needed
to run the motor , and as far as i know what i did will not work
unless you are planning on using the cosmo auto trani,,, if you are
using the auto,, then yes it can be done but i am the only other
person who has done it, and gotten the thing to run.
It's not easy,, and the only wiring diagrams you will find
are in Japanese, which didn't make it any easier to do!
I would offer to scan the wiring diagrams but the pages
are odd lengths and would take me for ever to scan.
you can see a little of me project at:
http://www.agt.net/public/nowback/rx7club/20b/
there is really no one you can turn to for help on what
you are about to do, because so few people have done
it, its a matter of one wire at a time, following the wiring
diagrams which kind of tell you what you need and don't
need, and even after all the time i spent, i know that i
didn't remove all the unnecessary wiring, there is just to
much there to figure it all out.

matt

matt

 

if you have the whole front of the car you would know that there is only 1 plug on the ecu that goes to the car.
and since you have enough of the car you can trace the wires. its not hard if you have a volt meter.

mike

 

mike your right it's not hard, just allot of work

matt

 

hey, now if you move the firewall boot the 20b harness will fit the fc

mike

 

guys what about making the cosmo ecu work with the fd 5 speed?

Isnt there a portion of the fd stock ecu that you can remove and solder onto the cosmo ecu? I'd think that the transmission control would be a seperate chip inside the ecu box that could be taken out.

I'm also sure that if it was possible someone would have done it already....I'm just wishing...I really want to do the 3 rotor conversion

now if I keep the stock cosmo computer do I need the cosmo auto transmission only or their entire driveshaft and differential?

thanks im a 3 rotor newbie

 

its been done, but the stock cosmo ecu isnt exactly the hot setup

mike

 

ok mike you seem to be the only one on this forum helping out lol

I think evil aviator lives very close to me

Is it easy to unsolder the chip from the fd ecu and put it onto the cosmo ecu?

I don't want to have huge performance out of this motor I just want to have intake and exhaust. Is it ok if I run that stuff with 10psi (isnt that the stock boost?)

does it work like the fd stock ecu as far as mods?

I get the feeling that the 20b croud isnt as helpful because they dont want anyone else to have a 3 rotor just by reading a few posts. I guess the saying you have to pay to play fits in here right?

any newbie 20b into fd threads you can point me to that would give all the basic info?

thanks so much
Snook

 

to unsolder the chip from the fd ecu and put it onto the cosmo ecu.
i think someone was joking with ya,,, cant be done.
the only way to make the 20b run on its stock wiring and
computer is to have everything from the cosmo and
basically make it run on the shop floor, which is what i did.
figuring out what is needed and what isn't is the hard part.
I am the only one that i know of who was dumb enough to
spend the time to do this.
O ya there is the guy who did one better and got it to run
with a 6 speed trani in a DMC.
matt

 

the DMC is a mid engine. comp drif
i think


True
maybe after you done all that crazy/alot of work
you.. could be like them too...
lazy to ans ? and all... hahahah

no
j/k


lol

 

so its a negative?
I don't want hardly any mods just intake full exhaust and intercooler....there's no way I can get the cosmo ecu to work with a 5 speed?

 

maybe it'll work
but not well
IMO
i don't know what will happen when the ecu try to shirf
but the auto trans is not there.
just let out all the connector used to control the trans,
but left the rev gear, neu switch, park switch, over drive switch... and...
i for got

i don't know much just trying to help....

 

it can be done, i have tried it, but I wouldn't go
through all the trouble to do it again.
at the moment i have the 20b and its auto trani
in a car, but i am building a new motor and plan to
swap out the cosmo computer run setup for a after
market computer and manual trani, i just wanted my
20b project car running and drive able while i built
the finished product, which i expect to take a couple years
to get the way i want it..

matt

 

yes a 5speed can be made to work with the cosmo ecu, but getting the cosmo ecu to work at all is the hard part

 

why? dont you get the complete engine with harness and cosmo ecu? It's all made for each other right? why is it so hard? I can see why the 5 speed part would be hard.

Does anyone know how to do this? I would pay.

Also can you modify your car on the cosmo ecu with intake exhaust and intercooler and turn up the boost or is it like the stock fd ecu where you have to keep it at 10psi but you can have all the bolt ons?