converting a GM non computer hei distributor to a computer hei

[Bob Valentine]

You're "technically" correct.  There's also tons of "technically" correct
things that don't work.   It worked for you, great. But for someone
installing a FI system for the first time (as the original poster was) they
need as many variables removed as possible.  This would be one of them.

You do have a point about irreversibly modifying a rare distributor.   A
Chevy HEI hardly fits that description.   

Getting the stock advance curve, if needed for GM EFI a engine never FI'd
by GM, is something that probably should be done BEFORE the conversion, not
after.

-> Bob Valentine
-> bob at tecmark.com

At 06:39 PM 12/11/2000 EST, you wrote:
>In order for the timing to be advanced, the reluctor has to "outrun" the 
>distributor shaft, so when accelerating or cruising, the distributor shaft
is 
>pushing the reluctor shaft essentially keeping them in contact. Therefore
the 
>only time "slop" enters the picture is on decel when the shaft is actually 
>slowing down and the reluctor "might" lag a bit due to angular momentum. If 
>sloppy timing is a problem on decel, then you could weld them together for 
>insurance, but I've been running just strong springs for 5 months with no 
>problems. I don't want to permanently lock down the mechanical advance 
>because I may want to map the distributor curve in the chip at a later date 
>just for kicks to see how far off the non-computer curve is from the
computer 
>advance curve. On my Jeep, I found the non computer distributor advance
curve 
>to be about all the engine could handle.  JW
>----------------------------------------------------------------------------
>To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
>in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
>
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org