Hey everyone Was reading a website about common errors when setting up a carburetor at Welcome to the Junk Yard Genius homepage! With the accelerator to the floor, when looking down the throat of the carb the throttle plates should be perfectly vertical, so checked tonight and the plates don't come even close to opening up as they should. Figured that's why it was a little slow to pass on the highway. Seems like there isn't much adjustment leeway on the rod that extends from the carb to the firewall connection, maybe it's too long - it may have been OK when the original Carb was installed. Will try to get some photos posted. Are there other adjustments I'm not aware of either at the carb or pedal assembly that I can tweak?

 

I don't have an answer for you but I'd like to give you a helpful suggestion. That glass fuel filter you are running has caused more vehicle fires. The seals dry up on the twist on ends and then you have a leak. Please consider a one piece clear plastic filter. Tried and proven. The last friend I warned did not listen. His old Ford engine bay went up in flames 1/2 mile from his house. True story.

 

Either lengthen the arm at the fire wall or connect the linkage at the carb closer to the center of the throttle shaft. personally, with the set up you have, I would lengthen the arm at the firewall. Connecting the linkage closer to the center of the throttle shaft might make the throttle open faster than you really want. Great for drag racing, but not great for that easy off the line of everyday driving.
If were mine, I would install a cable linkage. But that might be more work than you wish to do.
JMO

 

Yeah. The end of the throttle shaft hits the firewall when the pedal is floored, this is part of and/or the problem. If I shift the connector forward at the firewall that might work, but will have to cut off a couple inches or so it doesn't jam the firewall. I think. Do auto parts stores typically sell these throttle shafts in different lengths? Will look at it later today. Was hoping there was an easy tweak didn't know about.

Yeah, the glass filter is going bye bye soon. Thanks.

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Shorten the length of the linkage from the throttle shaft to the carb. As long as it will not push your gas peddle too far back towards you. I have also modified the throttle shaft at the firewall for a guy. I cut a 1/4 moon shaped piece of metal and attached it to the throttle shaft, pointing forward. It also raised it up to the proper height. BUT, you may be able to get away with just lengthening it. As long as you shorten the linkage.
I still would first try to shorten the linkage. Never know, might work. It doesn't take much. In theory, both the top of the throttle shaft and the point at which the linkage attaches to the carb, should be at the same height for the proper transition of the carb operation. The way you have yours set so low at the firewall, will make the 'beginning' of the transition, hard, taking more foot pressure. And, once you get past the mid point, it is too light. Makes for an uncomfortable transition.
Good thing you have two springs on it. The way you have it set up, I have seen throttles stick wide open when floored. NOT a good feeling. I was a passenger in a car when that happened to this guy I know. Good thing he kept a cool head and didn't panic. He reached forward and turned the key off, after a few seconds of my eyeballs popping out. Talk about pucker power....

 

Just curious, since it appears you are using a spring for the throttle plate to be fully open if perhaps there's room for either throttle plate, or choke adjustment?? Anyhow, had an urge to chime in??

 

Well trying not to make a career outta this stopped off at NAPA to see if they had some kind of universal linkage or a kit or something when picking up some antifreeze. Nada.

What I ended up doing was cutting about 2" of new threads, and slicing off another 2" at the end. Success! Works like a charm. It may need some fine adjustment later. TMR, it sounds like you're saying the throttle rod should be level, too - there is a lower hole on the carb, will install there and it would be about perfect. Thanks for the help guys!

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I just looked at all my photos of the tear down on my truck and as I thought your throttle linkage is on backwards. The threaded end goes on at the carb and the end that is just a 90 degree goes on the lever at the firewall. The rod goes through the lever from left side of lever pointing to the right side of the truck. The threaded end goes through the carb linkage pointing to the carb.

 

You're kiddin' me! Well, never had anything to go by - been like that since I got it. Makes sense though. The length would still not have been right ? Will swap it around tomorrow.

edit: Looked at it just now. The threaded end and round nut is secured by a clip - that slips around the threaded portion. Tried a couple different methods to secure this at the carb and didn't see how it would work but didn't spend much time at it. Will work on it tomorrow. But it looks like there is only one position the lug will fit, and the clip won't work. Probably need some new hardware. Any ideas? Thanks.

Oh, I got the hoses and radiator and everything installed and took it out for a test ride earlier today, AND a few full throttle M.O.C.'s Yeah Baby!!!!!!!