73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: SUX2BU99 on March 19, 2010, 12:12:05 pm
-
This is the side of my Edelbrock 1406 carb, the throttle return spring and the detent cable. I thought about adjusting the detent cable in an effort to have better downshifting. When I grabbled onto the cable bracket, I could slide it back and forth with the nut/bolt staying put! Obviously it seemed loose so I tightened it but when I did, it caused binding at the carb throttle. If I tried to pull the cable out a little more, the spring caused binding. Is that spring too long? Looks like there isn't much room for anything to move with it being so long. I wonder if I should pull the spring a little bit, moving the nut more forward, this should cause the spring to be pulled a little tighter and extend a little bit. Thoughts?
-
I wanted to edit what I said above but keep getting error messages. Here's my revised post:
This is the side of my Edelbrock 1406 carb, the throttle return spring and the detent cable (hidden behind the spring). I thought about adjusting the detent cable in an effort to have better downshifting. When I grabbed onto the cable bracket, I could slide it back and forth with the nut staying put! Obviously it seemed loose so I tightened it but when I did, it caused binding at the carb throttle. If I tried to pull the cable out a little more, the spring caused binding. Is that spring too long? Looks like there isn't much room for anything to move with it being so long. I really can't move the nut anywhere as this would move the throttle position since it's all tied together. I could try to loosen the nut and slide the cable to or fro. What way should I move the cable? Spring still seems awful long. Thoughts?
-
I'm not sure I understand what you're saying, sorry. Are you trying to cinch the nut down on the throttle linkage to adjust the kick down cable? The kick down cable looks like its sticking out way too far and should be adjusted back at the bracket until it can loosely slide on the screw without counting on the nut to hold it. As far as the spring it definitely doesn't look factory, but I'm not sure I see a problem with it as long as it does its job. If this isn't what you're asking,... my bad.
-
Sux, Sounds to me jared is on the right track. I also am a little unclear on what you think is a problem.
Spring is definitely not factory & looks to me to not be in the best place.
That throttle/kick down bracket also is pretty much poor (weak & the Two little screws holding the kick down part seem to like to let the 90* bracket move) Is this what your saying moves or at the front bolt/nut area? The front needs to slide & if this is what you tightened, yes the throttle would bind. That is why someone put a nylon lock nut on there so it could be "just" tight enough to let it slide, but not bind. Explain a bit more & will be glad to help! Lorne
-
Yeah sorry guys about the confusing post. I really try not to do that and be detailed.
What I was trying to get at is the detent cable supposed to stay put on the throttle bracket. ie. not supposed to move at all and the nut keeps it tight? Mine is not. When I try to cinch the nut down, I get some throttle binding issues. Plus, that spring to me looks too long but I'm wondering if it is. The carb is an Edelbrock so not surprised the spring isn't stock.
So if I understand what you guys said, the slot that is at the end of the detent cable is supposed to slide back and forth on the throttle bracket screw? Meaning, movement is okay? I was concerned when I just grabbed the slotted end of the cable and could slide it back and forth on the screw.
-
Short answer, the Kickdown slider should move and not be tightened down.
-
Gotcha. The detent cable can be adjusted though to move up/downshifts around right?
-
Yes you can adjust it but it is supposed to slide on the throttle shaft stud. You should definitely change that spring maybe with one of these http://www.jegs.com/i/JEGS/555/157100/10002/-1?parentProductId=1173112 hey for the 10 bucks might be worth it
-
Short answer, the Kickdown slider should move and not be tightened down.
x2 and the throttle linkage shouldnt hit the detent/kick-down cable till at least 1/2 throttle.. looks like you done hit it will 3/4-full. adn you stil have to stroke the cable ~1/4-3/8 of an inch to full engage it.
i would hold the carb at ~1/2 throttle(right b4 the secondary open). slide the cable back till your cable just barley hits. and fine tune form there
-
Thanks guys. Now I know what to check out.
-
I played around a little more with this on the weekend. So what happens is the detent cable moves as soon as the throttle is turned. The bolt on the throttle is not sliding in the slot. I believe this is from friction of the slotted end of the detent cable and the throttle assembly being somewhat sandwiched together. I loosened the lock nut until the bolt actually feels a little wobbly and then finally the detent cable would stay more or less while the throttle turns. It will get to about 3/4 throttle before the detent cable starts to move. Not because the bolt is at the end of the slot, but again because of friction. This doesn't sound like proper operation does it?
-
The cable should be on a stud instead of a screw and nut. Go to Autozone and look at the available studs.
-
I was going to make a post just like this. I wanted to see pictures of peoples Kickdown linkages on an Edelbrock carb. I have the same kickdown end. My problem is I dont know where to put the retun Spring. It seems like someone put the return spring through the same ring as the Kickdown. I was going to get the Edelbrock bracket and if it didnt work. I would resort to posting. But I would appreciate it if any of you would post a pic.
Thanks