Lotus Elan

Plugs setting with Emerald ECU

PostPost by: bob_rich » Mon Aug 04, 2014 9:28 am

Hi Folks

Using an Emerald ( or other) ECU system on the twink with a Ford based crank trigger with wasted spark ignition using the Ford Mondeo ( I think?) twin coil pack what plug gap is suggested. The standard ignition coil with distributor uses BPR7ES (or similar) plugs suggests a gap of around 0.635mm but modern plugs used with the Ford wasted spark system seem to suggest a gap of around 1.3mm

Any Emerald users got any info?

thanks in advance for any help

regards

Bob
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PostPost by: john.p.clegg » Mon Aug 04, 2014 2:32 pm

1.3mm being 51 thou,Ford Mondeo specs (donor for coilpack),I use 45 thou,...been O.K. so far.

John :wink:

Megasquirt,wasted spark,Ford coilpack,BPR6ES
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PostPost by: elanman999 » Tue Aug 05, 2014 8:03 am

Bob,
I'm running a Emerald K6, Valio coil pack, BPR6ES gapped at .033in.
Cheers
John
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PostPost by: bob_rich » Wed Aug 06, 2014 8:23 am

Thanks both

Looks like I can up the gap from the original setting (0.65mm)
Currently having trouble cranking the engine fast enough so some work 2 do on that

cheers

Bob
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PostPost by: john.p.clegg » Wed Aug 06, 2014 8:35 am

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PostPost by: elanman999 » Wed Aug 06, 2014 12:19 pm

Bob,
John is correct, a hi torque starter makes life a lot easier..

Edit: if you are having trouble getting the engine to turn over do make sure that the ignition is not massively advanced. I assume it's OK with the plugs out? If so you can get a rough idea of the timing by using a strobe with the plugs out.
Cheers
John
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PostPost by: bob_rich » Sat Aug 09, 2014 7:27 am

Thanks John and John and others

Unfortunately had a bit of a set back. was trying to check timing with plugs out when problem started. Replaced the battery gave a bit more cranking go. Am using a Wosp gear reduction starter LMS113 specified for the Lotus Twin Cam engine. The ring gear on the flywheel has failed quite badly and so it will have to be an engine out job. The starter seems fine but the ring gear damage is very severe and it appears that the engagement of the pinion with the flywheel was only over part of its length. The starter got quite a bit noisier with the plugs out when I was trying to check the timing , the engine made 180rpm. Plugs back in then suddenly a horrible graunch at around 140rpm. Engine had not fired.

Have attached a note from my rebuild notes clearly need to look at the relative location of the flywheel and pinion. B 4 this working through the Emerald get you going notes all seeming 2 B looking good with regard to the ECU operation.

Ah well there is always something B 4 the happy final bursting into life

any advise most welcome

cheers

Bob
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PostPost by: bob_rich » Sat Aug 09, 2014 7:36 am

Oops Attachement for above post did not pick up so try again

bob
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PostPost by: john.p.clegg » Sat Aug 09, 2014 1:12 pm

Although only half the pinion was engaged,it does look a long pinion,maybe fully meshed with the ring-gear?

John :wink:

P.S even with my Powerlite,I fettled a little off the starter face ring to give full mesh...
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