Anyone else putting a 20b or a custom 3 Rotor in the Rex? I know several people are in the middle of the project, just kind of seeking a rollcall...

I am.

http://20b.turbo2mazda.com
http://www.turbo2mazda.com

 

Me too!

http://home.tampabay.rr.com/spinraci...Car/index.html

Still need to piece together:
Ignition System
Fuel System (I have the pump, regulator, & filter)
Intercooler Plumbing
Anti-sway Bar
Transmission Block / Starter Mount Plate
Wiring for EMS and Aftermarket Gauges
And I'm still looking for a good Transmission

 

I have one in the works also.
I have not had time to setup a site about it yet
but will be at
http://rx7.cyberosity.com/20B
http://www.teamfc3s.org/project20b

not sure yet of what address I will use.
planning on having the the motor in the car and running
around april.

 

Does 2/3rds of a 3-rotor count?

 

I am considering it again. It depends if I can get a turbo for a good enough price

 

And what would good enough be Greg?

 

dont forget me!!!! if everything goes well i should have it running this weekend. on the stock ecu and sequential turbos http://www.2751engineering.com/miket2.html

mike

 

Ok, "stock ecu"... what do you mean? The stock Cosmo ECU? Are you running an auto tranny as well? If not, I didn't think that the Cosmo ECU would work without the Cosmo tranny... but who the hell knows!

Good luck with your project, all of you!!!

I'm in the process of planning out what turbo and whatnot I'll be putting on her...

I hope to have it up and running in April...

 

i think i can get the ecu/tranny computer thing worked out, i figured since i got everything with my engine that i might as well try anf use it.
the key bit is the coil/ignitors though they are crazy money if you dont get them with the motor

mike

 

we are doing one at Tuning Techniques with the new AEM computer. with the t51r kai. I keep you posted

 

you can modify the factory ECU to run without the auto tranny.
Or if you are after an alternative ECU, try the Microtech MT-12.Will control the split timing of the 3 rotor.

 

Hey dude, you seen to know quite a bit about this... do you know of a way to use Stock T2 iginition (obviously using more parts than came with the T2) like adding coils or something to get it to work? Thats my idea... but I talked to K2RD and they said that it doesn't work so hot...

But, I don't want to drop BANK on MSD stuff when I can get it running with what I have.

ALL HELP IS APPRECIATED!!!!!!!!!!!!!!!!!!!!

 

Would you please post how to do this? Nobody in the US has figured it out yet (not that many have tried, though. ). This information would be great for those looking for a budget 20B swap, if there is such a thing.

 

I am still wanting to get a 20b swap done sometime in my lifetime too, I'd love to have a 3 rotor BP.. Mmmmm.. BTW, Amemiya I would be interested to know if the new AEM will control a 3 rotor, I haven't seen anything about whether it will or it won't, let us know how you guys make out with it.

 

I have my 20b on the floor and am in the process
of removing unnecessary wiring and hoping to get
it running on the stock computer soon.
The pile of wires removed to date are starting to
make a fair pile
I have emailed some of the others in this thread
and have received some great input!
Will have a page with the pictures of the progress
up one of these days but have been to busy working
on wiring every night.

more later
matt

 

I'm wondering the same thing about the AEM ecu. Is is tri rotor compat.?

 

From what I understand the AEM ECU can do a 3 rotor using 5 channels. 1 channel using a wasted spark coil on 2 of the leading plugs like the 3rd gen 13b and the rest single coils. This gives you split timing control. I bet there is enough input & outputs to get the stock 20b twins running in sequential mode if you wanted to.

 

the 20b twins work just like the fd ones

mike

 

You CANNOT physically waste-spark the 20B. The 3 rotors are phased at 120degs!!
This is exactly how "Jason" described the AEM ECU firing the 20B. This is not correct.
The supra AEM ECU will probably run the 20B real well.

BTW, the AEM ECU will probably still require igniters/coils.

PK

 

You tell 'em!

 

Personally I don't have a whole lot of faith in the new AEM running a 20b, at least the FD box that is. That's why I asked that question, but I guess we will see when someone trys it, if I were doing a 20b, I would probably still go with Motec this early in the game since it is pretty much a sure thing and with AEM not even really being out yet though.

 

I talked to Jason Siebel of AEM in person at SEMA01 last year.&nbsp I was talking to another one of the AEM guys, and it sounds like they didn't have a clue how to fire the 20B "properly", cause the 5-channel ignition is a BIG clue that it can't fire independent trailing on a 3 rotor...

It's the same problem with MoTeC, as MoTeC doesn't fire independent trailing split ignition on a 3 rotor set-up also.

All this talk is moot if you're going to fire the leadings and trailings separately...



-Ted

 

I have just sent my deposit to Rob at Pineapple Racing to start building my ported 20b with 3mm ceramic seals.
The rest of the car still needs a ton of work except the suspension and diff.
Was thinking of hooking it up to a Jericho 5-speed dog box. Need comments/ suggestions on that.
What is the word on the new TEC-III. Is this capable of programmable split timing.

 

I've got a TEC I and that fires the split timing. It's got two separate banks of coils, one for each with a front-mount crank wheel that has two magnetic pick-ups as well.

 

Tec III will run a 20B perfectly, with independent spark control for each rotor -- leading and trailing. In addition, it provides for full sequential injection on a 20B.