[DML] Re: Efi question
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[DML] Re: Efi question



Hi Martin,

I am expecting the guy here within the hour with his lap top to get 
a start up map in the ECU. Exciting stuff! first time in almost 15 
years that this thing will (should) burst into life!

I did had the distributor removed and rebuilt. At the same time i 
had the advance weights locked up and i ground all but 1 pick up lug 
off. I have tested it on the bench and get a very nice looking 
signal for a cam position reference.

I am still using the distruibutor to distribute the spark but have 
the computer triggering an ignitor making it fully sequential, but 
as you noted not overly nessacery.

The new engine loom is in and very neat and compact compared to the 
old one!
  
Will keep you updated.


Cheers, Nick


Nick wrote:

>Martin -  Sounds like a great kit you are offering 
>
Not yet...... trying to get one built for Eurofest, but the crucial 
bit 
we were waiting on was the "if" the ECU could be adapted for odd-
fire. 
It can and has been shown on a bench to successfully trigger the 
stock 
ignition amplifier. There is no real reason to bin the distributor, 
but 
the advance weights will need to be immobilised. We have enough 
spare 
distributors to do this on exchange though! Only one incarnation of 
the 
PRV did not use a distributor of some kind, and only then because it 
didn't fit in the engine bay.

We've been tuning D engines for 3 years now and the biggest single 
gain 
before going to internals is re-mapping the ignition curve.

>FYI I have the ECU activating off a 3 x 120 deg crank triggered 
hall 
>sensor. I had a custom front pulley made for this and modified the 
>distrubutor so that i only get a single cam trigger.
>
Our ECU interpolates the original distributor signal beautifully for 
both TDC and phase (because being odd-fire the pattern repeats every 
two 
revolutions). We're going batch fired because I don't really see the 
point of full sequential on an old engine like this but we're only 
triggering once per 2 revolutions.

#2727's twin turbo is also progressing. A Renault 25 turbo flywheel 
has 
been machined to remove the peculiar "double tooth" pattern and now 
has 
a 66/3 pattern, again adapted for us in a special version of 
firmware. 
I 
picked up a 25 turbo bellhousing on ebay UK and that has now been 
built 
into a donor transmission (#2727 -was- an auto) and is looking all 
spangly ready to be mated to the engine which as of today is now 
internally finished and awaiting cleaning and a lick of paint. 
That's 
an 
even fire 2458cc Renaul 25 turbo engine built into a DeLorean block 
with 
R25 heads and the Island kit that came with the car.

>The ECU (haltech) i am using is fully programmable to adapt to odd 
>fire meaning i can also trigger the injectors at the correct times 
>etc..
>
The biggie is mapping the ignition. Especially with a supercharger 
you 
need that.

>It was hard to believe the amount of wiring i cut out of the engine 
>bay by removing the K jetronic.
>
With a stock of new rists conectiors, expect a new loom to be made :-
)

Martin









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