Ok guys need some help. I am trying to get my holley 4160 installed on my 351W HO. I am keeping the egr and will also keep the thermal porting that makes this work. No issues there, my problem is I only have 1 spark port on the 4160 so do I T the dist and egr into the same port or is there another location I am not aware of. The carb has 2 other ports besides the pcv, one I believe after looking is the ported vacuum, the other is beside it on the carb base and I think it is the same. Any help would be great.

Thanks Everyone, I am excited to get this pig going.

 

Have you looked on-line for a manual on the 4160? I know I pulled one down on the Edelbrock carbs. If that doesn't work I can look my 4160 over tomorrow and tell you what ports it has. So, let me know if you can't find the info on-line.

 

Hi MoFord,

Holley has many different variations of the 4160. I would get the list number off the air horn and do a search on the Holley web site for a manual. If that doesn't work call them at:

Toll-Free Technical Service: 1-866-GOHOLLEY
Technical Service: 1-270-781-9741
Fax: 1-270-781-9772
For online help, please refer to our website: www.holley.com

They are pretty helpful!

 

Good point. My 4160 may be very different than Moford's.

 

The vacuum supply to the EGR valve was controlled by a temperature-actuated valve (VCV) making the EGR operational only when the engine was warmed up.

 

The original carburetors on these trucks had a ported vacuum source for distributor vacuum advance and an additional "E" port on the carburetor for the purpose of the EGR valve and evaporative emissions, which also used a ported vacuum source. When I installed my Autolite 4100, it only had one vacuum port, and that was intended for the distributor vacuum advance. When I later decided to hook my evaporative emissions back up, I teed into the distributor vacuum advance port on the carburetor. That was two years ago, and everything works great.

You don't want the EGR valve and evaporative emissions operating while the engine is cold or at idle, because that would produce a rough idle and/or stall the engine. To make sure these devices didn't work while the engine was cold, Ford used a 150 degree thermal vacuum switch that is threaded into a water jacket to "turn on" these devices only when the engine coolant reaches 150 degrees. This is a 2-port vacuum switch, so one port connects to a vacuum delay valve (VDV) and then to the EGR valve and/or the charcoal canister by a vacuum hose, and the other port tees into a ported vacuum source. And since it uses ported vacuum, these devices *only* work [when the thermal vacuum switch is open] during cruising conditions, and not at idle or wide open throttle.

It still amazes me what Ford was able to accomplish before electronics using simple temperature-controlled thermal vacuum switches.