A 401 CJ
A 401 CJ GRM+ Memberand Dork
3/9/18 6:15 a.m.

I'm in to the carburetor phase of my junkyard 350 build.  It's the one that's been laying around my garages in pieces since 1994 that I had posted questions about previously.

Anyway, heads are ported after watching hours of Headbytes Porting and others on YouTube.  Ported them because I could.  I gasket matched the old iron intake too for what it's worth - likely exactly nothing but it was fun.  

Short block is done and now I'm on to the carburetor. I've disassembled it, soaked it in PineSol for a few hours, regasketed it, added a new needle and seat, and carefully reassembled it.  It looks like a brand spanking new carb after the Pine Sol soak.  What I've noticed though is that the housing on the hot-air choke body is busted.  And also, I'm missing some of the hot-air tubes that run from the intake manifold up to carburetor.  My plan was to just simply remove the hot air choke and to operate the choke plate via cable.  I don't have to pass visual emissions inspections and I don't even have anything to put this engine in right now anyway.  But what I'm wondering about is that the fast idle cam mechanism seems to be built into the automatic hot air choke.  Gee, I'd like to keep the fast idle cam.  How can I do that while ditching the hot air choke?

jstand
jstand Dork
3/9/18 6:37 a.m.

If you can post pictures of the linkage and   The broken pieces it would be helpful. 

Typically, when I’ve converted to cable choke the cable connects to the same place as the original actuator so the high idle cam still worked. 

akylekoz
akylekoz HalfDork
3/9/18 7:15 a.m.
Streetwiseguy
Streetwiseguy UltimaDork
3/9/18 8:05 a.m.

There used to be cable kits that would adapt right onto the coil.  The fast idle cam will work as normal, but you need to either step on the gas pedal when you pull the cable, or take the cam out of the carb and grind away the steps.  The electric thing isn't an entirely bad idea, either.

That is on a Chev 350?  It must be a very old carb, which isn't a bad thing.  They have been electric since the mid 70's, IIRC.  Oldsmobiles were hot air longer, but even they went electric eventually.

maschinenbau
maschinenbau GRM+ Memberand Dork
3/9/18 9:23 a.m.

My 350's Edelbrock carb (basically a Carter AFB design) has the electric choke and it has worked wonderfully every start up for the past 10 years. It was stupid simple to install, just a single powered wire to the electric choke. Mine looks a lot like that kit linked above. I can still adjust idle independent of the choke using a set screw, so it should work with your lumpy cam.

APEowner
APEowner GRM+ Memberand HalfDork
3/9/18 10:56 a.m.

This -> Nifty Link Thing will do just what you're asking about but I too recommend an electric conversion.

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