Distributor question for 81 L28et

[SDgoods]

The 81 CAS and the 82-83 Dizzy have the same plug configuration. The '81 CAS is a reluctor pickup that translates the signal to a square wave. The '82-83 is an optical encoder that outputs a square wave. As far as I can tell you can use either or. If that's not the case I'd like to know what the differences are that would prohbit them from being interchangable. It's not a wiring issue - is there an ECU issue?

 

If the two are interchangeable the '81 CAS tends to have a less than steller track record compared to the '82-83 dizzy/optical encoder. I would recomend using the '82-83 but as ppl have mentioned you need the oil pump shaft to match up. The L series turbo had a splined shaft to make timing more precise/less slop.

 

 

Reviving. I think I just killed my 81 external CAS.  So your saying the 4 prong connector that comes off the 81 cas is the same connector that comes off the 82-83 cas?  

 

My 81 for whatever reason has a 4 prong/pin connection on the underside that is UNUSED , is it safe to assume this is an 82-83 distributor? And that I can just find that connector for the distributor and attach it to the other 4 prong connector? 

 

If this is so I will hopefully pick up a z31 ecu and maf

 

 

[Tony D]

 

Reviving. I think I just killed my 81 external CAS.  So your saying the 4 prong connector that comes off the 81 cas is the same connector that comes off the 82-83 cas?

YES

 

My 81 for whatever reason has a 4 prong/pin connection on the underside that is UNUSED , is it safe to assume this is an 82-83 distributor? And that I can just find that connector for the distributor and attach it to the other 4 prong connector? 

OPEN IT UP AND SEE IF THERE IS ANYTHING INSIDE

 

If this is so I will hopefully pick up a z31 ecu and maf

 

 

 

WON'T KNOW TILL YOU CONFIRM INTERNALS