Manual vs Auto Q-Jet
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Joined: Mar 2011
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Manual vs Auto Q-Jet
I recently converted my 81 from the stock automatic to a TKO500 5 speed manual.
The conversion went well and the car seems to run great.
While doing some other research I saw that there is a difference in the carb for a manual vs automatic.
A post from Lars read: "Difference between AT and MT carbs is in the throttle arm configuration (for kickdown linkage), vacuum port for modulator on AT carbs, and occasionally a slight jetting difference."
My question is.... after the trans swap, I don't believe they did anything to the carb and was wondering if there is any downside to running a manual transmission with an "auto" q-jet?
Do I need to change the configuration of the carb? Should I get some new linkage?
Thanks for any info...
The conversion went well and the car seems to run great.
While doing some other research I saw that there is a difference in the carb for a manual vs automatic.
A post from Lars read: "Difference between AT and MT carbs is in the throttle arm configuration (for kickdown linkage), vacuum port for modulator on AT carbs, and occasionally a slight jetting difference."
My question is.... after the trans swap, I don't believe they did anything to the carb and was wondering if there is any downside to running a manual transmission with an "auto" q-jet?
Do I need to change the configuration of the carb? Should I get some new linkage?
Thanks for any info...
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
All that happens is they whould have removed your kickdown (or TV) cable. Nothing else will make a bit of difference. Drive and SMILE!
(You might double check you're still getting wide open throttle with the pedal. Who knows if the bracket got tweaked)
(You might double check you're still getting wide open throttle with the pedal. Who knows if the bracket got tweaked)
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
If it runs well, it's probably best to leave it alone.
The secondary airvalve tension/choke pull off may be a bit different as an auto remains under more consistent load during shifts, but it's likely not necessary to mess with it.
If the carb has never been fine tuned, odds are it's just as much off now as it was before.
The linkage on the automatic carbs is additional, so there's no reason to worry about it unless you're stressing out over a few ounces of metal.
The secondary airvalve tension/choke pull off may be a bit different as an auto remains under more consistent load during shifts, but it's likely not necessary to mess with it.
If the carb has never been fine tuned, odds are it's just as much off now as it was before.
The linkage on the automatic carbs is additional, so there's no reason to worry about it unless you're stressing out over a few ounces of metal.
