4age ignition help! vw kombi engine conversion!

[IWL_86]

Gday all! I'm new to this forum...
I've been in the process of fitting a 4age smallport motor to my 1974 vw kombi panel van and I've hit a pretty major hurdle with the ignition system.

Long story short...I'm running the 4age on a single weber carb so I need the ignition to be completely standalone. There is lots of guys running 4age carb setups with expensive msd or megajolt edis setups but unfortunately I'm on a pretty tight budget at the moment.

Is it possible to use my standard 100kw distributor, igniter and coil to run my engine? I know this would mean that I would have no advance/ retard function, but for the mean time I'd just set the static timing to 15 or 20 deg.

Can this be done? Any help would be greatly appreciated.

[w810sc]

check this:
http://www.86garage.com/forums/viewtopic.php?t=143

[IWL_86]

Thats a great thread, but unfortunately doesn't solve my problem.

Apparently I can use a Blue top dizzy and run with locked out timing, but nowhere I have found that talks about wiring it up without the ecu.

Does the Blue top dizzy(3 wire) work more like a points distributor?

[essaysixtythree]

I think that Megajolt isnt overly expensive for what you get.

http://cgi.ebay.com/ebaymotors/EDIS-...Q5fAccessories
EDIS 4 under $150 shipped

http://www.autosportlabs.com/megajolte-p-41.html
Preassembled Megajolt lite jr controller under $200 shipped

You will probably need to buy say $30 worth of wiring.
A little bit of time to make a sensor bracket, mount everything and wire it.

The software is free and there is heaps of tech support available. Im not trying to sell it to you, just that im installing one for the first time myself at the moment and Iv found it to be a really neat package if you have the time.
my 2c.

[3jcelica]

IWL_86,

I don't think you will find any 4age dizzy that work like points.

I don't know the blue top dizzy, but I assume it is a locked dizzy (no vacumm or mechanical advance) running a vr sensor. Yes this could be run standalone without management, but I would suggest you would probably have to run a different ignition module such a bosch 008 or 22re ignition from a corona. This could run the locked dizzy (if the sensors wheel has 4 teeth) but performance is going to be avergae.

You could do stand alone ignition management such as this below. This would require a map sensor, and RPM input (this would require an signal conditioner to do signal conditioning on the vr signal as the unit wants a square wave signal (again a 22re module can be used for this), and a second ignition module to drive the coil).

http://www.jaycar.com.au/productView.asp?ID=KC5442

Never used the Jaycar unit so don't know its cabailities.

Other options include Second hand haltech IG5 ignition computer, second hand efi computer, megajolt or megasquirt. Or modifing a points distributer to fit.

[w810sc]

if your dizzy has the 4 teeth magnetic pick up with the 2 wires you could use it with the coil and igniter:
http://www.toymods.org.au/forums/sho...light=2t+dizzy

[IWL_86]

Thanks everyone for the quick replies and great info, i've heard this is the best forum to discuss all things technical toyota.

Modifying my current dizzy sounds like a good option at this point. I was just thinking gringing teeth from the bottom pickup wheel and running that to a RA22 igniter/coil setup and locked out timing.... probably a bad idea. If i could transplant a mechanical only advance and 4 point pickup i'd be laughing. On previous VW engines ive built i've used petronics igniters with mech only dizzys with great results, both NA and Turbs.

I might get my hands on a blue top dizzy tomorrow, im pretty sure it has a 4 tooth mag pickup. If that fails ill definately go megajolt I think.

Ill Post some picks up of my conversion if anyone is interested?

Thanks again for all the graet advice.

[IWL_86]

so...I managed to modify the standard red top dizzy by making the bottom wheel only have 4 points and one reluctor pickup.

I plugged the reluctor wire into a Bosch HEI module from a 4ac distributor and used a regular Bosch coil.

I timed it a 24ish degrees of advance and the engine runs fine.

I think this is the sinplest and cheapest way to get a 4age working on carb.