Accelerator Cable Question??
Thread Starter
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Joined: Sep 2004
Posts: 595
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From: Boston MA
Accelerator Cable Question??
Hello everyone,
Currently, my accelerator cable does not open the secondaries when the gas pedal is depressed completely to the floor. The cable is an aftermarket setup because the stock one would not work well with my demon. My question is should I make the entire length of the cable shorter? By this I mean, right now the cable is a little long and bends before it hits the firewall. Should I make that shorter and reduce the bend? Will that make the cable pull the linkage back further? Also, the linkage on the demon wants to come back in a downward motion, but when it hits the point that is parallel to the cable it stops. (in other words the cable would have to pull down below the bracket in order to fully open the secondaires.
I have been told to bend the pedal, cut the cable shorter, and change/bend the accelerator cable bracket, but I wanted to ask if anyone else had trouble with their cable before I do any of that or if anyone had any suggestions.
All suggestions welcome and appreciated.
Thanks,
Joe
Currently, my accelerator cable does not open the secondaries when the gas pedal is depressed completely to the floor. The cable is an aftermarket setup because the stock one would not work well with my demon. My question is should I make the entire length of the cable shorter? By this I mean, right now the cable is a little long and bends before it hits the firewall. Should I make that shorter and reduce the bend? Will that make the cable pull the linkage back further? Also, the linkage on the demon wants to come back in a downward motion, but when it hits the point that is parallel to the cable it stops. (in other words the cable would have to pull down below the bracket in order to fully open the secondaires.
I have been told to bend the pedal, cut the cable shorter, and change/bend the accelerator cable bracket, but I wanted to ask if anyone else had trouble with their cable before I do any of that or if anyone had any suggestions.
All suggestions welcome and appreciated.
Thanks,
Joe
Instructor
Joined: Apr 2004
Posts: 235
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From: Mansfield Ohio
I don't think shortening it would have any effect on the travel. Hard to say without a picture, but sounds to me like you need to move the cable closer to the manifold and maybe back a little to get right geometry.
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Joined: Sep 2004
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From: Boston MA
Originally Posted by bobs77vet
you know for sure you have mechanical secondaries?? as opposed to vacuum secondaries
Thread Starter
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Joined: Sep 2004
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From: Boston MA
Originally Posted by exdrag77
I don't think shortening it would have any effect on the travel. Hard to say without a picture, but sounds to me like you need to move the cable closer to the manifold and maybe back a little to get right geometry.
Right now the bracket is under one of the carb nuts. Should I put it underneath the carb instead. (inbetween the carb and manifold gasket?) potential leak?
back a little? Do you mean towards the fire wall?
Thanks,
Joe
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Sounds like 2 problems.
1) Wrong bracket for the carb. If you aren't using a correct bracket, then the "pull angle" will be off.
2) Wrong fulcrum point on the carb bellcrank. There should be another hole in the bellcrank on the carb that is lower (on a verticle plane up from the throttle plate shaft) than the one you are using. This will move the bellcrank/shaft further for a given amount of cable travel
1) Wrong bracket for the carb. If you aren't using a correct bracket, then the "pull angle" will be off.
2) Wrong fulcrum point on the carb bellcrank. There should be another hole in the bellcrank on the carb that is lower (on a verticle plane up from the throttle plate shaft) than the one you are using. This will move the bellcrank/shaft further for a given amount of cable travel
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
if you need some visual ideas on linkage setups pick up a street rod magazine those guys do good work and have great ideas...
Instructor
Joined: Apr 2004
Posts: 235
Likes: 0
From: Mansfield Ohio
Originally Posted by 68coupe
closer to the manifold?
Right now the bracket is under one of the carb nuts. Should I put it underneath the carb instead. (inbetween the carb and manifold gasket?) potential leak?
back a little? Do you mean towards the fire wall?
Thanks,
Joe
Right now the bracket is under one of the carb nuts. Should I put it underneath the carb instead. (inbetween the carb and manifold gasket?) potential leak?
back a little? Do you mean towards the fire wall?
Thanks,
Joe
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Joined: Sep 2004
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From: Boston MA
Originally Posted by pws69
Sounds like 2 problems.
1) Wrong bracket for the carb. If you aren't using a correct bracket, then the "pull angle" will be off.
2) Wrong fulcrum point on the carb bellcrank. There should be another hole in the bellcrank on the carb that is lower (on a verticle plane up from the throttle plate shaft) than the one you are using. This will move the bellcrank/shaft further for a given amount of cable travel
1) Wrong bracket for the carb. If you aren't using a correct bracket, then the "pull angle" will be off.
2) Wrong fulcrum point on the carb bellcrank. There should be another hole in the bellcrank on the carb that is lower (on a verticle plane up from the throttle plate shaft) than the one you are using. This will move the bellcrank/shaft further for a given amount of cable travel
you could have walked over and said that! You are only 5 feet away from me right now!!
What type of bracket should I look for? Right now I have a square bracket.
As for the hole on the bellcrank, I want it lower?? If the cable needs to pull the linkage down further, shouldn't it be higher? Higher would make make the angle larger??
Thanks,
Joe
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Joined: Sep 2004
Posts: 595
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From: Boston MA
Walked over and talked to Paul.
As usual, he is right. The place where the cable connects to the carb needs to be lower. In addition, I might need to lower the bracket.
I will post a picture ASAP.
Thanks,
Joe
As usual, he is right. The place where the cable connects to the carb needs to be lower. In addition, I might need to lower the bracket.
I will post a picture ASAP.
Thanks,
Joe
