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Throttle cable doesnt have enough throw.

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Old Mar 22, 2010 | 10:39 AM
  #1  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Throttle cable doesnt have enough throw.

So when i was adjusting my TV cable i noticed that my carb wasn't opening all the way when i floored my car. It seems like the pedal doesn't have enough throw to open the secondaries all the way. I'm running a holley 700 DP with the throttle/kickdown bracket.

Any ideas?

Thanks, Chas
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Old Mar 22, 2010 | 12:06 PM
  #2  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
You said "throttle/kick down bracket" (technically, it isn't a "kick down").

Did you use the geometry corrector bracket that bolts to the carb throttle arm itself?
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Old Mar 22, 2010 | 01:20 PM
  #3  
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by five7kid
You said "throttle/kick down bracket" (technically, it isn't a "kick down").

Did you use the geometry corrector bracket that bolts to the carb throttle arm itself?
For the throttle or the TV cable?

This is the bracket i had to buy: http://www.summitracing.com/parts/HLY-20-95/

Is this the corrector your talking about?: http://www.summitracing.com/parts/SUM-700202/


I dont have enough throw for my throttle/gas pedal not the throttle valve.

I might be missing something here....
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Old Mar 22, 2010 | 01:45 PM
  #4  
wrsjr's Avatar
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From: Birmingham, AL
Car: 1991 Camaro RS
Engine: 355
Transmission: 700R4
Axle/Gears: 10 bolt Richmond 3.73 posi w/ discs
Re: Throttle cable doesnt have enough throw.

You'll have to fab up a piece to move the bracket back. I bought an aftermarket TV cable bracket and throttle cable bracket. I had to use some plate steel and move the bracket so it would have enough pull.
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Old Mar 22, 2010 | 02:06 PM
  #5  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally Posted by chas0218
Is this the corrector your talking about?: http://www.summitracing.com/parts/SUM-700202/
Yes. Without it, your TH700 will not be happy.

Originally Posted by chas0218
I dont have enough throw for my throttle/gas pedal not the throttle valve.
Understood, just pointing out another problem that is often overlooked.

Last edited by five7kid; Mar 22, 2010 at 03:53 PM.
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Old Mar 22, 2010 | 03:46 PM
  #6  
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by five7kid
Yes. Without it, your TH700 will not be happy.


Understood, just pointing out another problem that is often overlooked.
ahh ok so is there a fix for the throttle cable? right now the bracket is as far back as it can go without opening the primaries permaturely. When i floor it the secondarys dont open all the way. The pedal does not have anything behind it except floor pan.

Its not the carb because i can open the secondarys at WOT by moving the throttle plate.
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Old Mar 22, 2010 | 03:54 PM
  #7  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Where are you mounting the throttle cable on the throttle arm?
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Old Mar 22, 2010 | 04:38 PM
  #8  
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by five7kid
Where are you mounting the throttle cable on the throttle arm?
The marker is pointing to the spot. This is not the carb on my car but another that i have. I'm up at school so I can't take a pic of the carb on the car.



The TV cable is connected to the furthest bottom hole.
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Old Mar 22, 2010 | 10:04 PM
  #9  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by chas0218
The marker is pointing to the spot. This is not the carb on my car but another that i have. I'm up at school so I can't take a pic of the carb on the car.



The TV cable is connected to the furthest bottom hole.

I was reading one of my holley rebuild books and it says to bend the connecting rod that engages the secondaries slightly to be sure they open all the way. How much should i bend it?
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Old Mar 22, 2010 | 10:42 PM
  #10  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Enough so that the primaries and secondaries are open fully, when you are opening the throttle arm by hand. You don't do that to make up for insufficient cable travel.

Speaking of the cable, you might want to check for a collapsed housing or failing cable wire.
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Old Mar 22, 2010 | 11:20 PM
  #11  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by five7kid
Enough so that the primaries and secondaries are open fully, when you are opening the throttle arm by hand. You don't do that to make up for insufficient cable travel.

Speaking of the cable, you might want to check for a collapsed housing or failing cable wire.
They already open fully by hand. Where is the housing under the dash at the top of the pedal?
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Old Mar 22, 2010 | 11:51 PM
  #12  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If they both open completely by hand, then don't touch that secondary link.

The throttle cable housing is all visible in the engine compartment. The cable is hooked to the pedal above the pivot point - you have to remove the panel under the steering column to see it (assuming your panel is installed).
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Old Mar 23, 2010 | 09:17 AM
  #13  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by five7kid
If they both open completely by hand, then don't touch that secondary link.

The throttle cable housing is all visible in the engine compartment. The cable is hooked to the pedal above the pivot point - you have to remove the panel under the steering column to see it (assuming your panel is installed).
Ok thanks
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Old Mar 28, 2010 | 08:18 PM
  #14  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Fixed my throw problem...there wasn't any adjustments that I could make to the pedal or the cable. I just grabbed the bottom of the pedal and bent it up a bit no prob now.
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Old Mar 29, 2010 | 07:24 AM
  #15  
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Joined: Aug 2007
Posts: 282
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From: Birmingham, AL
Car: 1991 Camaro RS
Engine: 355
Transmission: 700R4
Axle/Gears: 10 bolt Richmond 3.73 posi w/ discs
Re: Throttle cable doesnt have enough throw.

You could have just cut a piece of steel like I did and move the bracket back.


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Old Mar 30, 2010 | 09:58 PM
  #16  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by wrsjr
You could have just cut a piece of steel like I did and move the bracket back.


I still am going to but I need to get the car running and up to school and ill cut the throttle side off and weld it back further.
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Old Mar 30, 2010 | 10:04 PM
  #17  
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From: morrow, ga
Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: Throttle cable doesnt have enough throw.

thats was i was gonna suggest, the pedal lever being bent. i have a cool story about that. i let a buddy drive my drag car and he stomped the pedal so hard he bent the bracket.
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Old Mar 30, 2010 | 10:28 PM
  #18  
chas0218's Avatar
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From: Corning NY
Car: 86' IROC
Engine: 388
Transmission: Built 700r4
Axle/Gears: 3.08 non-posi
Re: Throttle cable doesnt have enough throw.

Originally Posted by skirkland1980
thats was i was gonna suggest, the pedal lever being bent. i have a cool story about that. i let a buddy drive my drag car and he stomped the pedal so hard he bent the bracket.
haha i might have done the same thing when i was racing a couple cars last summer....
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