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Username Post: does anyone still use Holley commander 950 ?        (Topic#372733)
Posts: 23

Reg: 09-10-09
03-11-23 10:09 AM - Post#2855637    

Hello All,

Question: Does anyone out there use a Holley commander 950 EFI ?

What do you use to send the RPM signal to the Commander ecu ?

Did you ever use the coil (-) yellow wire for the rpm signal to the Holley ?

thanks for reading !

Edited by andy2175m4 on 03-11-23 10:25 AM. Reason for edit: No reason given.


Valued Contributor
Posts: 4031

Reg: 04-15-05
03-11-23 12:16 PM - Post#2855641    
    In response to andy2175m4

You know, I really don't remember how I did the one in my one V8 Vega, but it has an MSD 6A box, and I remember it used the tachometer feed wire terminal on the side of the box.

For points, I would think that signal would come from the negative side of the coil.

The fellow that runs the EFI department at Holley, Doug Flynn, should be able to help as well. Maybe not for some of his techs, they are too young to know. There should be some sort of wiring diagrams available on the net as well.

I know I would use the C950 EONS before a FiTech/Sniper junker.

"19th Year" Gold Supporting Member
Posts: 2077
Loc: Dallas, TX
Reg: 05-17-04
03-18-23 02:50 PM - Post#2855901    
    In response to andy2175m4

Check on the Holley Performance products Forum. Lots of knowledgeable folks there.

'57 210, 327 cid, Holley MPFI, 700R4, A/C & more.
'51 Studebaker Starlite coupe, 350, TH400, GV OD.
'96 Replica of a 1950's Teardrop Trailer.


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