Sean O'Mahony

Hi does anyone have any info on the MicroDynamics ECU that comes as part Elford Turbo Package (see picture attachment), like the wiring colur code for the plug etc ? I have just bought an Elford Turbo kit on ebay in pieces and I need to find out where the Microdynamics ECU plugs into and what wiring mods are needed to the standard loom to fit it.

I know the ECU is supposed to retard ignition to prevent detonation with the increased boost but there doesnt seem to be a boost switch or boost transducer input. Also it looks like there is some kind of piezo buzzer on the side of the ECU.

Any help much appreciated.

Rex4Life

Sorry, never seen one of those. Would need a better pic even to try and guess what it does.

PaulFitzwarryne

Great to see someone from Leicester with a RX-7, in my youth I went to Loughborough for sports coaching.

My brother had one of the early Elford turbo cars with the SU. The last group went efi with 165 bhp. I can remember the kit and a similar one they did for the 626 which from memory cost just over a thousand pounds, expensive in 84! Does your kit include the fuel modifications?

Will ask my brother if he remembers the wiring details but 21 years is a long time. There is a forum member in Belgium who has an Elford still, but not certain if it is SU or efi. I suggest you search on Elford, find his name and send a pm. Perhaps the best thread is 'Elford Turbo' started on 29 July 03 from someone with the same problem.

The Elford was a great RX-7, my brother had some great informal road races against my Lotus Elan SE. The RX was quicker in a straight line but lost out on the curves, inspite of the Elan having steering sourced from a Triumph.

Mireck 12A

The boost sensor is normaly mounted on top of the rear iron of the engine
Have you got any wiring with the turbo set?


Let me know, i got 2 Elfords, 1 fully stock and a other fully modified (no emisssions, no electronics gizmo piezo speaker beeper thingies, see my sign)

Also on www.mazdarotaryclub.com there is more info to find.

and i'm not Belgium , but Dutch and Elfords where always SU's HIFF 44, no EFI's

Mireck 12A

Lotus Elan, nice

i'm already glad i can keep up or be faster than a stock FD, but that's more thanks to the light weight SA and heavy FD (and maybe because i got 220 HP out of the Elford )

ghehe, but in stock form, the Elfords are great, for the same reasons i like GSL-SE's, a little more power, stock first gen's are a bit underpowered in my opinion

PaulFitzwarryne

The Elan SE was a great car and I later regreted replacing it with a type 47. The latter was really impractical, the luggage space was limited to an overnight bag size space in front above the spare tire.

I still believe there was an efi version of the Elford turbo. I just looked up a reference which gives SU version 160hp, 150ftlb torque, cost 10,900 pounds and the efi version 165hp, 166ftlb torque, cost 11,900 pounds.

In the early 80s I tried the Elford, Motorspeed, and TWR turboed RX-7s but finally went more sportscar with a Lotus Super Seven having got used to minimum space.

The Motorspeed version which from memory had twin Webber 45DCOEs certainly had a MicroDynamics controller. It really operated in the same manner as the 12A Turbo boost retard system. I presume any fitted to the Elford served the same purpose, more safety than performance.

I currently run a 1985 with a 12A Turbo efi engine[GT-X spec] with stock turbo and porting, but a front mounted intercooler. She produces some 220hp at the wheels much is great in a daily driver.

Sean O'Mahony

Thanks for all the info - I've looked inside the Microdynamics box and the circuit doesnt look too complex - an IC555 timer and a few transistors - I'm going to try and work out roughly what the circuit does by tracing through the PCB tracks. Hopefully then I can work out the wiring to the connector. Funny thing is someone seems to have cut the 12V supply wire and the +ve wire to the buzzer then screwed the lid back on.

Mireck 12A

If you want i can take a picture for you to sort out the wires coming out of the box.
If you want, i can also take a picture of the inside.

I understand the wires were cut from the box?

REgards,

Mireck

Mireck 12A

here are some pics, i will mail them to you also in large format.