Thread: Quadrajet, and spark plug questions.

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Originally posted by pfogle
Actually, the 700 has a mechanical 4th gear (od) and then a torque converter lock up. My current setup is a 229V6 with a 200c three speed with a lockup TC. So it's just a matter of making sure I wire the TC correctly to the existing controls. The carb will either work or get replaced. I'm not going to mess with the electronics.. I had a '92 E150 that was MPFI on a 351w. While it got 17mpg empty at 70mph. It was a beast to work on. This is an old car with no provisions for a computer so it's not gettin one...

the same wire thats locking up your conv now should work fine. i belive the carb. will to. i belive youll get that 20 mpg. let me know.

OK, the OD switch I am referring to is the torque converter lockup, so if you can adapt the current three speed lockup control that's fine, but it's beyond my ability. For that reason I am using the hydraulic switch with a modified 700R4 and an Edelbrock 1406 carb (600 CFM) on a non-electronic '76 Corvette 350 block. I don't want to mess with the electronic controls either, but if your 350 has them it may be easier to simulate the original setup than to eliminate them? Still you seem to know pretty much what to do now. Best Wishes.

Don Shillady
Retired Scientist/teen rodder

Okay.. It's gonna be a while before I can do anything.. I've got carpal tunnel problems and arthritis. This cold weather is killing me... It WILL be done before july, but I hope to have it done next month after it warms up.

Originally posted by pfogle
Okay.. It's gonna be a while before I can do anything.. I've got carpal tunnel problems and arthritis. This cold weather is killing me... It WILL be done before july, but I hope to have it done next month after it warms up.

good luck.

Well the 350 is back together. It's not running yet as I'm still waiting on an intake and carb. It's getting closer! All the bearings spec'd good (.002 to.003 instead of the .005 to .006 we had. We used .002 oversize bearings.)

Hey there. I'll drop mine in here too, 'cause. Most of what goin' on here sounds like good advice, but I wouldn't worry too much about the "computer" on that '86 burban. It's pretty much just a body computer. That is is doesn't actually run much on the engine, just takes readings, pretty much. The carb you're talkin' about, if Im not mistaken, is the early electric carb and it's about the only "computer" controlled component on the engine itself.

'86, standard old HEI I'm guessin? Those 2 wires on the carb are still technicall a TPS so that would be the only problem I would forsee. The carb won't respond as well as with the box. Other than that you should be able to dump the air pump, O2 sensors, etc... and have no problems. On the up side that is still a quad intake so an earlier model would fit no prob and you would still see the benefits of "stock" asspiration, ie: better mileage and good all around performance.

I'm glad to see everything spec'd out good. Should be a great mill for that G body.

If I'm correct






The carb you have is not a feed back/o2 sensor carb. The two wire device on top is a cold enrichment solenoid not a mixture control solenoid. You will find replaceable jets inside.

Oh yea, The distributer is probably a five wire with a vac. and mechanical advance. The suburban had a spark control computer and a knock sensor to retard timing through the module.

The 2 wire plug on top is the vent solenoid. It looks identical to the mixture control solenoid on the passenger car carb. The trucks never used ECM controlled fuel mixture. The only thing you should have to do is find out how GM controlled the vent function (I would speculate that any time the key is on the vent solenoid would be energized to close it, if that's the case you could take any key on B+ and power it) Bear in mind that you should retain all the emmision crud to match the carb. You might do better with an earlier manifold and QJ.

On the distributor subject, the knock retard fuction of the module can be by-passed. If you need the procedure, drop me an e-mail and I'll get it from my PC at work.

Actually, I replaced the carb with a Edelbrock 600cfm carter/afb. Went with an OLD weiand x-celerator intake (circa mid 60's, has the hole in the intake for the oil fill... The dizzy is a standard HEI. I just bought a 2001 windstar so the malibu MAY get done finally.