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| | | Forums66 Topics128,087 Posts1,056,114 Members48,435 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Sep 2007 Posts: 2,644 Shop Shark | | Shop Shark Joined: Sep 2007 Posts: 2,644 | I'm planning to use a 390cfm Holley on my 235. It comes with an electric choke, something I have no working knowledge of.
Holley also sells a manual choke kit for this carb, and I'm considering using it because I understand the purpose of a coke, how to use it and like the idea of maintaining a touch of old-fashion technology.
If you were in my position and had a choice between an electric choke or a manual choke, which would you choose and why? | | | | | Joined: Jan 2007 Posts: 202 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2007 Posts: 202 | Being somewhat nostalgic myself, the manual is a good way to go. Electrics are ok and usually work fine but....unlike hot water choke they come on too soon after sitting a short while when you don't really need it working. Plus, they burn out and sometimes the wiring breaks on them and they don't open like they should. Also you can push it in when YOU want to, not when it wants to. You might want just a little choke instead of a closed one racing at too high an idle especially when you don't need a high idle waisting gas. Easier on the tranny if its an automatic. Some electrics kick off too soon and others take forever to open all the way up. Also they can stick easier. My wife doesn't know how to use one so I have an electric for now. Just my two cents worth. | | | | | Joined: May 2007 Posts: 95 Wrench Fetcher | | Wrench Fetcher Joined: May 2007 Posts: 95 | Manual I like the KISS style.
| | | | | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | If you have an automatic transmission, the electric choke can lead to engine stalling problems.
If manual transmission, you can always rev the engine at a stop sign with the clutch pushed in and slip the clutch until the engine is hot.
Manual choke for me, on everything, new or old - much more reliable, and they work much better given that the operator has some understanding of an engine.
Jon. Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Jul 2007 Posts: 461 Shop Shark | | Shop Shark Joined: Jul 2007 Posts: 461 | I would also go with the manual choke if the original carburetor didn't have an electric choke. The 390 Holley seems like a large carburetor for your 235 engine. Are you talking about 390 CFM? My quick calculation for air flow for the 235 CID engine comes up with about 270 CFM at 4000 RPM.
Harvester | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I like the electric choke but the Holley manual choke works very good unlike some of the conversion kits for Q-jets & some other carbs. They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Is your truck 6 volt or 12 volt? Unless the electric choke is designed to work at 6 volt, having a 6 volt truck might force other changes, or answer the question for you.
That said, on a truck already converted to 12 volt I might choose the electric just because its one less thing to think about while driving.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more... It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Nov 2007 Posts: 131 Certified Bolt Nut | | Certified Bolt Nut Joined: Nov 2007 Posts: 131 | old school manual choke here...its what came on the truck, so that's what I'm keeping | | | | | Joined: Aug 2004 Posts: 1,067 Shop Shark | | Shop Shark Joined: Aug 2004 Posts: 1,067 | My personal choice is a manual choke. Although, once adjusted, the electric choke works pretty well too.
52 GMC 3/4 ton pickup 68 Big Block Vette 68 455 Firebird | | | | | Joined: Sep 2007 Posts: 2,644 Shop Shark | | Shop Shark Joined: Sep 2007 Posts: 2,644 | once adjusted, the electric choke works pretty well too. That's all I needed to hear... I got enough stuff to worry about without adjusting electric chokes. I'm going with something I understand... the manual kind.  | | |
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