24V FFR Woes

[disco2hse]

Seriously though. The 24V coil is worth looking at and if you go electronic (using Pertronix) then no more timing problems either. Actually, Pertronix will make you a 24V coil if you ask and it will be guaranteed to worth with their ignitor.

[bfrieck]

Over the weekend I found my FFR manual from which I quote:

"The ignition coil is a 10 volt oil filled unit and to make it suitable for the 24 volt system a ballast resistor is connected in series with primary winding of the coil. The ballast resistor is housed with the filter unit."

"The filter unit is fitted to suppress interference to radio equipment. It consists of a choke, connected in series with the supply to the ignition coil, and two capacitors connected one across each end of the choke and the earth."

At this point I think I can buy a simple 24v to 12v converter (a 10 amp rating should be more than enough) to replace everything in the black box. Of course, I will no longer have interference suppression for the radios that were removed the truck when it was sold on by the South African army. I do think I might look into the electronic ignition although the potential for ruining it (not under warranty) by hooking it up wrong is somewhat intimidating.

The problem with doing away with the 10 v ignition system is that a future owner might not know what was done and replace the coil with one intended for a 12v civilian truck - that would again result in an exploded coil and accompanying engine room fire.

I do like the 24 v system otherwise. Starter really spins the little 4 banger and if I ever needed it, I've got a 90 amp 24v three phase alternator.

Oh, yes. Two more reasons not to replace the oem filter/converter: Blanchard quoted about 350 pounds sterling plus shipping and Craddocks quoted 442 pounds sterling plus "carriage" - both of which amounts are more than I paid for the whole truck!

Bruce

[disco2hse]

Ahhh the peace of a decision made B)

[Les Parker]

Your avatar is not from that strange film "Blacksheep", is it?

[disco2hse]

haha yeah.

Kiwi humour. I reckon it's hilarious

[Les Parker]

Yes, I howled the first time I saw it. M.J Fox could have been it it, Baaa-ck to the Future

[tonydags]

Hi,

The black box is just a filter unit with a resistor for the coil. The coil is 10v the resistor drops the 24v down to the low voltage. The filter stops the RF signal coming back into the wiring and causing issues with the radios and giving off a RF signature for the enemy to detect I believe. A company in the UK called jolly engineering makes 24v electronic ignition kit that replaces the mechanic old point system and condensor. I have a s3 lightweight 24V 2.25 petrol and am using the kit.

You can actually replace the coil with a new non restsistored type like a Boach R44 I think from memory is the low voltage I.e. 10v non resistored however you would need to re-crimp connectors etc to suit it. The coils used are just Lucas coil but with the shielding to stop RF signals escaping and interfering etc..