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Username Post: tbi coil conversion        (Topic#359193)
danbrown 
Newbie
Posts: 1

Reg: 12-22-19
12-22-19 11:49 AM - Post#2782676    

I am currently putting a tbi unit off a 1995 chevy pickup on a 1974 chevy pickup. I have the tbi distributor from the 1995, but want to use an old style cylindrical coil (non-tbi). Has anyone done this, and, if so, how did you wire it?



 


Texasray 
"4th Year" Gold Supporting Member
Posts: 103
Texasray
Loc: Texas
Reg: 11-01-16
01-17-20 08:46 AM - Post#2784530    
    In response to danbrown

It's been awhile since you posted this up, still working on it? I've not tried to put a old oil filled coil on where a newer system module type epoxy coil was but... the wiring is about the same.
The pink wire to the '95 system comes from ignition, it also pigtails out to excite the module. The white wires go from the ignition coil to the tach and the module. The module then grounds the white wire to the coil in a pulse just as the points would. The trick here is that the oil filled coil would provide the protection for the electronic circuit that is in your distributor. You would need to find a resistance value for the primary side of the epoxy '95 coil that can be found in a old style oil filled coil. You may find a compatible coil in the aftermarket. Maybe an older Accell or Mallory unit, if I remember some of those units from the '80's would work with their point units and the first electronic units. But I am dealing with some old brain cells here so...

Good Luck with your project.

Sam




 
IgnitionMan 
Valued Contributor
Posts: 3700

Reg: 04-15-05
01-26-20 05:21 PM - Post#2785243    
    In response to danbrown

Stock oil filled canister coil works on both full voltage (NO resistor), and mounts off the distributor.

A small diameter body EFI HEI distributor is available, look into Rock Auto, 1990 or so V8 distributor that has the 8 pin HEI with one edge protruding past the relief for it in the cap.

I would have posted pictures of this stuff, but it costs money I don't have now. Rock Auto has pictures of this distributor.



 


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