Author Topic: Converting Q-Jet to Manual choke.  (Read 2632 times)

Offline Trans Am

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Converting Q-Jet to Manual choke.
« on: June 09, 2013, 12:43:57 AM »
My questions are at the end of the post.

Long story short, when I used to drive my '75 T/A (which had a '76 Q-Jet atop), one thing that drove me nuts was the choke not doing what I said when I said. Apparently it thought it knew a better way to make the engine run than I did.

Years later I jumped into a '56 ford with it's original I-6 motor and a single barrel Holley that had a manual driver-controlled choke. After driving it for a few weeks and getting to know its "style", I could start it perfectly where it would immediately jump to the exact rpm I desired--in the blazing summer heat or the blistering winter cold--EVERY time. I became a master at positioning the choke plate to make my motor start and run at my desired RPM under all temperature conditions--almost never needing more than 1-2 seconds of cranking until it fired...even in 35-40ºF.

My point is that I feel like I grasped better control of starting cold/hot engines and gradually dropping the idle as it warmed than did that pathetic choke on my T/A. So I had an epiphany to jury-rig it to manual just like my truck, but have read a few different advisory's not to do so.


Why shouldn't I? How can it affect my Q-jets performance and possibly ruin the unit or affect my motor? Is there a way to convert auto-choke Q-Jet's to manual and not have any negative effect at all?
Thank you very much.


I digress:
My best guess at why there is auto chokes and not manual is that people thought they had better things to do than adjust warm up speeds themselves. If you are going to warn me that such mods will annoy me and ruin my driving experience....then I refute that claim with my own adventures when driving my '56 Ford for a year and half. Never a day went by that I didn't start that truck and think to myself: Boy...if only my T/A was this easy, consistent, and perfect to start.
« Last Edit: June 09, 2013, 12:52:54 AM by Trans Am »

Offline 429bbf

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Re: Converting Q-Jet to Manual choke.
« Reply #1 on: June 09, 2013, 05:54:05 AM »
welcome to chp. im old enough to have started many hand crank tractors. also lived where it gets 40 below and stays there for weeks on end . so i believe im qualified to answer your question.i used to hate modern tech.some i still do. the old hand choke is as good as it gets . when you get an electric choke set properly on a qjet its as good or better the the manual imo.i now run 2 quads on fords and also elec. chokes . there flawless. i have mine set a little tight because it does get 20 to 30 below.in the summer i just turn the key on for a little before i start it the first time in the morning.it seems like theres about 20 different adj.for the choke but if done properly you will enjoy the way the work.oh one last thing if your going to go electric buy a good choke coil.the cheap ones will make you hate elec chokes. because they dont work consistantly the same every day.like your trans am experience.fwiw

Offline Trans Am

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Re: Converting Q-Jet to Manual choke.
« Reply #2 on: June 11, 2013, 10:24:22 PM »
Thank you for the reply. I will look into the electric chokes, however I'm still curious if altering my current Q-jet will damage its performance.

Offline omaha

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Re: Converting Q-Jet to Manual choke.
« Reply #3 on: June 11, 2013, 11:08:28 PM »
  I don't use a choke and so far Ii have gotten by. And I live in cold country. Manual choke is just fine. The reason for the automatic chokes is that people are forgetful.

Offline 429bbf

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Re: Converting Q-Jet to Manual choke.
« Reply #4 on: June 14, 2013, 05:32:56 AM »
never have tried to put a manual on a electric model but i dont see why it would be that tuff. i suppose depending on ones mechanical ability (up north we call it )southern engineering.it should have no effect on your performance .imho ive done things for people most folks would never think of trying (ive sanded chunks of rod bearing off the crank of a 40,000 dollar diesel engine while its still in the machine .put new rod bearings in and make it run for another year or till they could get the money to fix it properly .