AC carb solenoid

[Chevy Dave]

I have a 70 SS454 wihh the original carb.  I would like to add an AC solinoid to the carb.  I purchased one from  a 71 Corvette with a 454 and AC, and it did not fit. Doe's anyone know of one from another GM car that would fit.  I think that an idle stop solinoid would also work if wired to the compressor circuit.

[Scott S.]

Chevelles.

Impalas might.....

Not sure if any of the B.O.P. G-bodies will interchange. 

[Rob Peters]

What is an AC solenoid?  Are you referring to the Anti-dieseling solenoid?

rob

[Marks71]

2 hours ago, Rob Peters said:

What is an AC solenoid?  Are you referring to the Anti-dieseling solenoid?

I could be totally wrong here, but I’d guess it steps up the idle slightly when the AC is on to compensate for the additional drag created by the compressor.

[1970mcss]

I had the same questions a few years ago. I thought my 70 454 should have had the solenoid. We did alot of research and could never proof that the 70 came with the solenoid. Dan James (Overdrive) made me a bracket to mount a solenoid to the factory carburetor. I ended up taking it off as it didn't seem to help. I ended up taking it off. If you are interested, you are welcome to the bracket. I also have the extension harness. Let me know, Paul

 

 

[Rob Peters]

5 minutes ago, 1970mcss said:

I had the same questions a few years ago. I thought my 70 454 should have had the solenoid. We did alot of research and could never proof that the 70 came with the solenoid. Dan James (Overdrive) made me a bracket to mount a solenoid to the factory carburetor. I ended up taking it off as it didn't seem to help. I ended up taking it off. If you are interested, you are welcome to the bracket. I also have the extension harness. Let me know, Paul

 

 

My original 1970 350 4brl had the solenoid and my current 1970  350 2brl has the solenoid.

rob

[Rob Peters]

2 hours ago, Marks71 said:

4 hours ago, Rob Peters said:

What is an AC solenoid?  Are you referring to the Anti-dieseling solenoid?

I could be totally wrong here, but I’d guess it steps up the idle slightly when the AC is on to compensate for the additional drag created by the compressor.

Expand  

If we are talking about the same solenoid, the one mounted to the drivers side of the carb, that solenoid is not energized by the AC, it is automatically powered and energized as soon as the key is turned to the start/run position and sets as soon as the accelerator is pumped on the initial start.

It does not disengage when the AC is turned off but does disengage when the key is turned off.  So, when the key is turned to the off position the solenoid loses power and thus drops the throttle linkage below the idle and helps prevent engine run-on, aka dieseling.

rob

[1970mcss]

17 minutes ago, Rob Peters said:

My original 1970 350 4brl had the solenoid and my current 1970  350 2brl has the solenoid.

rob

Yes Rob, the 350 had it but we never found that the 454 did

[Chevy Dave]

Paul,

I would like to see a photo of the bracket and solenoid.  I might purchase it.

Chevy Dave

[Leghome]

Before I went with the Sniper EFI I hadd a solenoid on my Eldebrock 1406 to increase the idle whenthe AC kicked on. I sold the carb and have no ideawhere the braccket and solenoid are. The bracket was made for the 1406 and would not work on any other carb. I just spliced it into the power wire to the compressor so when it kicked in the solenoid was activated. Worked great

[1970mcss]

20 hours ago, Chevy Dave said:

Paul,

I would like to see a photo of the bracket and solenoid.  I might purchase it.

Chevy Dave

Let me get it out of storage and get a picture of it. I don't have the solenoid any more. 

[cny first gen 71]

I may still have the solenoid off of my 2 barrel,  I'm not sure if they are the same. I removed it when I went to 4 barrel. I'd have to look.

[1970mcss]

I looked in my extra parts and I don't see it. I'll keep looking and if I find it I will let you know.