The GS ignitor diy

[Grimly]

Following on from Matchless's .pdf file linked here somewhere (found it, it's this one)

http://www.mediafire.com/download/mmmoluy1yev/Repair+and+Fault+finding+GS1000G+Ignitor.pdf

about the construction of a diy ignitor, what really sparked my interest was the addition of a footnote to the original document where a pair of GM D1906 HEI ignitor modules were used to fire the standard coils, using the standard triggers.
I've just taken delivery of the second of two Intermotor HEI ignitors.
Unbeknownst to me, was the fact that the GM HEI module was a world-wide phenomenon during the 80s and many cars outside the U.S. used it. In fact, millions of cars in the European market were fitted with the system, it being made under licence by several companies here for the OEM and aftermarket. I've scored a pair of New Old Stock modules for a total of twenty quid - result.
Watch this space...

[salty_monk]

I used one to run the ignition on a 62 Ford Falcon I had... Not sure the Ford guys would like that but it worked great

[pete]

I'll tune into this... doing some research/testing to retro fit a different style signal generator into the 450's to use with these as well.

I started setting up a test rig last night, need to find a motor I can run the rotor on to start making a test bench and get into it.

[Grimly]

I'll tune into this... doing some research/testing to retro fit a different style signal generator into the 450's to use with these as well.

I started setting up a test rig last night, need to find a motor I can run the rotor on to start making a test bench and get into it.

Just waiting on the small components to arrive - the drawback of living in the sticks, having to order stuff that I used to have plenty of.
The cost of postage made it worthwhile to buy enough bits to build half a dozen units. The other bike's ignitor won't last forever anyway, so I'd be as well to build a spare for it too.

[pete]

I hear ya'... I don't have the postage issue but I used to have a bunch of electrical components from my college days... then I had a clean out after deciding I wouldn't need them any more...

When I get back in the garage and get my test rig going I'll shoot up a photo or two too just in case it's helpful...

[Grimly]

BIG FAT BLUE SPARKS!!!!!!!!!!!

Here are the two modules built into an electrical wall box, which is a handy type of thing.



And here are the sparks...

https://www.youtube.com/watch?v=Oq3QqEeDEEM

I don't know where they fall as regards timing yet - will find out tomorrow, but it's not too bad for manky old plugs and standard Honda CBR coils. The ignition leads are double-wound wire core silicone insulated, with the original caps left on, as I don't want to wreck those - so will see how they fare in use.

[posplayr]

BIG FAT BLUE SPARKS!!!!!!!!!!!

Here are the two modules built into an electrical wall box, which is a handy type of thing.



And here are the sparks...

https://www.youtube.com/watch?v=Oq3QqEeDEEM

I don't know where they fall as regards timing yet - will find out tomorrow, but it's not too bad for manky old plugs and standard Honda CBR coils. The ignition leads are double-wound wire core silicone insulated, with the original caps left on, as I don't want to wreck those - so will see how they fare in use.

The "proof is in the pudding", looks well grounded as well.

[Nessism]

BIG FAT BLUE SPARKS!!!!!!!!!!!

NICE! Looks like you have done a fabulous job channeling your inner Mad Max.

[blowerbike]

i had a belt drive ignition on a Z1900 years ago...not a mag.. it had a GM module inside of it along with an HEI coil if i remember correctly.
think it was a BHP boost retard set up...worked great..big fat azz spark!

[pete]

Great stuff! My plans to do this on the 450 have been thwarted once again... my Dynatek failed before I finished my test rig so I was forced to put the stock ignitor I got from Greg (SVSooke) in before I got to really test it... thankfully it's working well and has been running on two since I put it in last Monday night.

[Grimly]

Well, it remains to be seen how well it actually does in service, or even if it gets into service; but the originator has been using these modules for Kwaks for years and the 'Zuk app is only slightly different, but possibly different enough to need some more farkling with. I'm hoping it's ok - as it's a very cost-effective way of getting an updated electronic ignition without going Dyna-S. I've nothing against Dyna, but the cost of them here is savage once import duty and carriage kicks in.
Another option I've looked at is a pair of self-contained modules, exactly the same as Dyna units, but a mere 25quid each, mounted on the timing plate. Otoh, I'd really prefer to keep all the electronics away from the engine heat if possible, and if the GM - inna- box works long term, that's what I'll stick with and build more of.

[pete]

Ah that's Lou D right? Had some communication with him when I looked at doing it originally... smart bloke!

[Grimly]

Ah that's Lou D right? Had some communication with him when I looked at doing it originally... smart bloke!

That's him, yep.
I stuck the timing light on it today and gave it a spin over - looks like the marks are within ~5 deg, but hard to be sure until it actually starts, as the timing light wasn't flashing every spark.
Won't be long until the old heap bursts into life again

[pete]

Excellent, looking forward to seeing/hearing the first run!

[blowerbike]

That's him, yep.
I stuck the timing light on it today and gave it a spin over - looks like the marks are within ~5 deg, but hard to be sure until it actually starts, as the timing light wasn't flashing every spark.
Won't be long until the old heap bursts into life again

can't you install a degree wheel and rotate the crank it until a fires each pair of plugs?
that's how i used to do all the hot rod stuff.