J&S ecu for 5kT

[Ameer Antar]

I was contemplating using a J&S system on my 5kT. If I do the 1.8 bar 
upgrade, this might be useful. The J&S is pretty versatile and can be used 
on the 5-cylinder engines. It does individual knock retarding up to 20 
degrees. It's got a rev limit and can put out 7A to the ignition coil 
[which actually doesn't seem important, b/c I think the ignition coil is 
triggered by a low current signal from the hall sender on 5kT's].

The only thing I don't understand is how the J&S makes a timing map. Can 
you program a map that is adjusted by the knock signal? What does this map 
look like? The thing that bothers me about the ecu, is it does not use any 
sensors but knock sensor to figure out advance. The oe Hitachi ecu uses 
intake temp, intake pressure, coolant temp, etc. to calculate adjustments 
to advance, then the knock sensor adjusts this if necessary. I guess the 
question is which one would be better? I'm leaning toward OE, just b/c it 
relies on many important sensors, but the J&S does have good knock retard 
capabilities. Is there a way to make the J&S use moer sensors? Thanks.

-ameer
'84 5kT