924 Turbo S2 with S1 dizzy

[adian]

I have a problem: my 1982 924 Turbo I bought a month back has had the original electronic distributor replaced with a Series1 mechanical distributor. I was wondering why it's been pinking so badly above 5000rpm!

Problem is:
1) Where do I find a replacement distributor? And what do I need? Just the cap and assorted wiring, or a completely new distributor?
2) I need to trace the original wiring for the electronic distributor. Anyone can help me out with this problem? Wiring harness diagrams perhaps??

/adian

[Brando]

Distributor is directly on the cam. Positioning can't be changed.

How the hell?

[Slam]

Go to www.924board.org and ask there. Brando, the car's a 931, not a 951. IIRC the distributor's not that hard to find. It's the rest of the DITC stuff that is. HTH

[adian]

Thanks, I'll check out what they might have to say on that forum.

Yeah, the dizzy isn't so much the problem, it's everything else that's supposed to be on it that's going to be the nightmare!

/adian

[924RACR]

Actually... that shouldn't be a problem IF the advance components inside the Series 1 dizzy were eliminated, so that it's running fixed timing. Easy to do with the vacuum advance plate (disassemble, rotate the thing 90 degrees, there's a hole for the advance pin in the base plate that'll fix it, then reassemble). The mechanical advance is a little more of a PITA to negate, but can be done with a drill press, if your machinist is good. That or spot-weld it in place.

The Series 2 only uses the distributor to distribute the spark, not for timing. That said, the rotor still needs to be reasonably close.

What kind of car do you have? I'm guessing you're in the UK with a Euro car? I trust you're running high-enough octane gas?

Then you have to look at other engine-management concerns to explain the pinging/pinking... not running too much boost, are you? Can you confirm that the wastegate is functioning properly?

[adian]

Hi 924RACR...

Thanks for that.

I'm in Malaysia. My 924 turbo is 1 of only 3 or 4 running specimens in the country. It's bog standard at the moment, boost is standard and the wastegate seems to be fine. To be honest it doesn't help that our ambient daytime temperature averages 32-34C!!! I'm working to create a cold air intake to assist, and fit an intercooler I have lying around to see if this helps.

Pinking occurs at 3100rpm to 3500rpm, and above 5000rpm (obviously I didn't pull any further!).

I'm familiar with more modern EFi-type digital ignition and what is required, but of course the 924 turbo with it's "classic" system is new to me!

Therefore, you are saying that I can run the car with fixed imechanical ignition advance? No offence, but that kind of doesn't make sense. If you don't mind, could you explain a bit more how your recommended modification sorts this out? Engines require different amounts of ignition advance at different engine speeds and load, so if we lock it at one particular advance position, wouldn't this be worse?

I'm going to try and richen the mixture a bit through mixture screw, think this should help a bit?

Thanks!

/adian

[Brando]

He said 82 924... Thought 924S. I'm losing it arrrgh. :P

disregard my posts lol.