Author Topic: Ecu  (Read 3554 times)

Offline johnf

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« on: December 29, 2007, 05:00:47 PM »
I was just wondering if my Cosmo has a stock ECU - better take a look.

Save me searching the car, where is it, same place as the FD?


John
I started with nothing and I have most of it left

Online kev-yorks

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« Reply #1 on: December 29, 2007, 08:35:00 PM »
N/S passenger foot well John under the carpet.
Kevin
Regards Kevin

DMRH

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« Reply #2 on: January 03, 2008, 12:39:15 PM »
On the subject of ECU\'s.

RE-Amemiya have ceased production of the REdom range of "chipped" ECU\'s to suit all 8-bit systems

NA MX-5
FC RX-7
HC Luce
JC Cosmo

However, DO-Engineering have taken up the challenge. Have just scored their 1st "Chipped" ECU for a Cosmo guy here in Sydney.

Watch his progress at www.eunos.com.au

We will be doing a before/after dyno session in around 2-weeks time & will post the results

Their ECU upgrade should do the same as the REdom version.

Remove 180km/h speed cut
Remove 0.70-bar boost cut
Remove conservative IGN map
Remove conservative Fuel map
Remove "limp mode" on trivial error codes

More aggresive Fuel/IGN map
More boost, up to 1-bar
Use up to 100% duty cycle on injectors

Here is a pic of my "chipped" ECU from RE-Amemiya

Note "REdom" stickered Eprom chip (standard 2756D) in foreground. This is the reprogrammed IGN map.

Note mezzanine board just aft with processor, RAM? & eprom chip combined. This is the reprogrammed Fuel map & fuel controls such as boost cut, speed cut, limp mode.





The DO-engineering version looks 99% identical.


REgards

Offline Gaijin-Samurai

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« Reply #3 on: January 11, 2008, 07:42:04 PM »
Are there any such ECU\'s sui table for a 13B Cosmo?

DMRH

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« Reply #4 on: February 21, 2008, 12:44:00 PM »
Quote from: Gaijin-Samurai
Are there any such ECU\'s sui table for a 13B Cosmo?


Yes, once Do-Engineering get this right, they will do it for the 13B version too.

Update is that the ECU delivered was a failure & has been sent back to Japan to be re-programmed again. There was no 2nd turbo operation which Do explained as a difference in firmware but I interpreted as a simple screw up.

Shall report on its progress once its posted back to Sydney.

BTW, the Do ECU is actually a REdom mini so I am guessing they are just using the guy who did all the RE-Amemiya programming or they have purchased all the 8-bit N.O.S from RE-Amemiya. Either way, it was of minor amusement when we opened the "Do ECU" to find the REdom firmware.....

REgards
« Last Edit: February 21, 2008, 12:50:33 PM by DMRH »

Offline Gaijin-Samurai

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« Reply #5 on: February 22, 2008, 10:59:55 AM »
Please do keep us updated as i am very interested in the result of the new ecu when they finally get it right for you.

Offline Ultraman_Cosmo

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« Reply #6 on: February 22, 2008, 05:42:36 PM »
me too, i\'m hoping to get my 20b uk registered and on the road this year (asap) and i\'d like to know what mods i can make to up the power. what would people recommend as the first steps to modifying it? i\'m not wanting to go mad (i.e. single turbo, nos etc) but am thinking ecu, breathing, exhaust?

cheers,
phil
Cosmo 110S,  RX4 Coupe, RX7, RX8, JC Cosmo 20B, NSU Ro80\'s etc......

DMRH

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« Reply #7 on: March 15, 2008, 12:44:43 PM »
Good news is that the ECU has returned from Do_engineering & with its new program. Its working fine.

The Cosmo feels as strong as my Cosmo & shall be posting results as soon as its dyno\'ed. Due to a restriction found in the exhaust, its coming out first before the cosmo is re-dyno\'ed

REgards