Could I hook the choke up to a key on 12v? In all honesty I haven’t looked for a missing/unhooked connection.
Quadrajet or Aftermarket?
- Thread starter TheSaint
- Start date
You could do that, but you really want the choke to be powered only when the engine is running. A relay tied into the oil pressure switch is the ideal way to do it, but key on power technically will work.
Oil pressure switch as stated is best way.
First fix your fuel line. It is kinked and won't flow as is.
Second it is the wrong carb. You need a non C3 ECM carb which is pre 1981.
First fix your fuel line. It is kinked and won't flow as is.
Second it is the wrong carb. You need a non C3 ECM carb which is pre 1981.
The Qjet in the picture is a truck Qjet with the a grey connector for a 2 stage accel pump. Its not a true CCC Qjet. A real CCC Qjet that would come in a G body would have a blue connector for the air fuel mixture control solenoid and a white plug the the throttle position sensor and a normal accel pump.
How do you plan to drive it?
You have 350 TBI heads looks to be 193 Swirl port. Not known as real HP head but they are known very good low-end torque.
If running current Spread Bore intake you can go Edelbrock 650. You will need a spacer/adapter Spread Bore to Square Bore. Out off the box are fairly trouble free, most come with electric choke. They have their quirks but are tunable and fairly easy to work on. Out of the box check float setting first, that seems to be common OEM issue.
If you are running current Square Bore intake, then I would go with Holley 650 Vacuum Secondary, most come electric choke.
Now if you want to do some stop light to stop light fun or want some thing with a little more spunk, Spread Bore intake and Holley Spread Bore 650 Quadrajet Replacement carb. Most times will have to specify electric choke. This carb is mechanical secondary double pumper and you can go as much as 50cc on each end. Linkage is some what progressive but as you get the primary near 3/4, secondaries start coming in very fast and very quickly full open.
Looks like good clean install
You have 350 TBI heads looks to be 193 Swirl port. Not known as real HP head but they are known very good low-end torque.
If running current Spread Bore intake you can go Edelbrock 650. You will need a spacer/adapter Spread Bore to Square Bore. Out off the box are fairly trouble free, most come with electric choke. They have their quirks but are tunable and fairly easy to work on. Out of the box check float setting first, that seems to be common OEM issue.
If you are running current Square Bore intake, then I would go with Holley 650 Vacuum Secondary, most come electric choke.
Now if you want to do some stop light to stop light fun or want some thing with a little more spunk, Spread Bore intake and Holley Spread Bore 650 Quadrajet Replacement carb. Most times will have to specify electric choke. This carb is mechanical secondary double pumper and you can go as much as 50cc on each end. Linkage is some what progressive but as you get the primary near 3/4, secondaries start coming in very fast and very quickly full open.
Looks like good clean install
Agreed- that one is just a regular Q-jet with the pump solenoid. I've seen it on Chevy pickups and Suburbans. Unhooked is fine. I feel the electric choke is the easiest to work with. As stated, get a good ignition switched 12 volt source and adjust it properly. If your vehicle is 1980 or newer the choke wire is buried in there somewhere. Just know that no matter what has been done to the engine, a Q-jet can be modified to work great with it. Get Doug Roe's Rochester book and learn all about these incredible carbs.
I was thinking that it may be one of those. Go aftermarket, that carb may be a nightmare to tune with the solenoid and extra jet.
No, it is fine. The solenoid only activates under unusually hot conditions. Think of it as two accelerator pump settings, regular, and over heated. It was a carburetor emissions idea for vehicles that did not come with OBD1, like pickups. I have modified a couple to work on older engines just because that model Chevy carb was all we had available.
I think I have one of those Chevy truck Q-jets, They also had the capped off mixture adjustment screws.
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