Demon Carb Kickdown Linkage
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Mountain Pass
Joined: Mar 2008
Posts: 119
Likes: 1
Demon Carb Kickdown Linkage
I recently bought a Barry Grant Speed Demon 750cfm carb with the ford kickdown linkage. I am installing it on my 79 F-150 with an auto trans. Does anyone have any suggestions or pics of how the stock kickdown rod will hook up to the Demon. Any way I have tried still ends up with the kickdown rod interfering with the throttle linkage. The rod end is too large and it binds. I can probably grind down some excess and maybe make it fit, But I decided to appeal to you guys in search of a better solution. Thanks in advance for any help.
Post Fiend
Joined: Jul 2006
Posts: 6,948
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When I was running an auto behind a 385 series engine, and a Demon carb, I remeber running into the same issue, and I had to modify the linkage to get this to work. Yes I did some grinding.
After a few months passed, I had to install a carb spacer (actually a Nitrous plate) and after this was installed, thelinkage was free moving, and looked as though it never had to be ground down? It worked perfect. That truck now uses a ful manual valve body so there is no longer a kickdown, and the other has a 4 speed., but the carb spacer made the lnkage work perfect.
Are you running a decent intake and at least a 1 inch spacer? Perhaps the opposite is true, and you have too much intake heigth.
have you considered this?
After a few months passed, I had to install a carb spacer (actually a Nitrous plate) and after this was installed, thelinkage was free moving, and looked as though it never had to be ground down? It worked perfect. That truck now uses a ful manual valve body so there is no longer a kickdown, and the other has a 4 speed., but the carb spacer made the lnkage work perfect.
Are you running a decent intake and at least a 1 inch spacer? Perhaps the opposite is true, and you have too much intake heigth.
have you considered this?
Thread Starter
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Mountain Pass
Joined: Mar 2008
Posts: 119
Likes: 1
height
I am running an edelbrock perfomer 460 and I also have a 1" phenolic spacer on it. The height does not seem to be a problem as I just bent the rod a bit to make it fit. The problem seems to be the kickdown rod end is so big it will not fit onto the pin provided without binding. So far all I can come up with is grinding and hoping it will fit. The other issue I noticed is that when I mount the ball stud for my throttlr cable it also binds the demons kickdown linkage. I dont think the Barry grant guys put much effort into this setup. Their site is pathetic when it comes to help as all they say to my problem is that Ford has too many kickdown linkages to be sure they all fit and that it is up to me to figure something out. Big help.
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