 carb linkage return spring, need the right tension |
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| nycchef |
 Aug 17 2009, 03:26 PM
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#1
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mechanical moron  Group: Members Posts: 952 Joined: 28-November 05 From: new york city n.y. Member No.: 5,202 Region Association: None  |
been trying different home depot springs on my hex bar carb set up. can't find the right tension, either i need 2 feet\ to depress the pedal or it takes 10 seconds to come down from 5000 rpm's. what are you guys using?
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| tat2dphreak |
Aug 17 2009, 04:31 PM
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#2
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region  |
try the auto-parts store... a carb return spring (IMG:style_emoticons/default/smile.gif)
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| neil30076 |
Aug 17 2009, 04:39 PM
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#3
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Recovering dismantler! Group: Members Posts: 397 Joined: 12-September 06 From: San Diego ( RB) CA Member No.: 6,826 Region Association: Southwest Region |
QUOTE(nycchef @ Aug 17 2009, 02:26 PM)  been trying different home depot springs on my hex bar carb set up. can't find the right tension, either i need 2 feet\ to depress the pedal or it takes 10 seconds to come down from 5000 rpm's. what are you guys using? Rich, Have you identified where it is 'heavy"? 1) If you unhook the spiring and the cable, and attach the cable diretly to the spring, does it still feel the same? 2)With the cable completely disconnected, does it still feel as heavy when you push down on the gas pedal? 3) If you tie a 10lb lead weight around you right foot does it feel lighter when you press the pedal (IMG:style_emoticons/default/biggrin.gif) |
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| nycchef |
Aug 17 2009, 04:48 PM
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#4
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mechanical moron Group: Members Posts: 952 Joined: 28-November 05 From: new york city n.y. Member No.: 5,202 Region Association: None |
QUOTE(neil30076 @ Aug 17 2009, 02:39 PM) QUOTE(nycchef @ Aug 17 2009, 02:26 PM) been trying different home depot springs on my hex bar carb set up. can't find the right tension, either i need 2 feet\ to depress the pedal or it takes 10 seconds to come down from 5000 rpm's. what are you guys using? Rich, Have you identified where it is 'heavy"? 1) If you unhook the spiring and the cable, and attach the cable diretly to the spring, does it still feel the same? 2)With the cable completely disconnected, does it still feel as heavy when you push down on the gas pedal? 3) If you tie a 10lb lead weight around you right foot does it feel lighter when you press the pedal (IMG:style_emoticons/default/biggrin.gif) i think the problem is the angle of the cable coming out of the non stock (read homemade) cable mount, i adjusted the angle a bit and it,s lighter and a little more even, will have to have a higher one fabricated. as for Question 2 .. i do not have a 10 lb lead weight, i have a 115 lb dead weight but thankfully she is visiting her sister. seriously neil. tyhis car is coming along. seems to be running a little lean and stumbles a little at about 2800 rpms or so. but i'm getting closer. thanks for all the help |
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| neil30076 |
Aug 17 2009, 05:01 PM
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#5
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Recovering dismantler! Group: Members Posts: 397 Joined: 12-September 06 From: San Diego ( RB) CA Member No.: 6,826 Region Association: Southwest Region |
i think the problem is the angle of the cable coming out of the non stock (read homemade) cable mount, i adjusted the angle a bit and it,s lighter and a little more even, will have to have a higher one fabricated. as for Question 2 .. i do not have a 10 lb lead weight, i have a 115 lb dead weight but thankfully she is visiting her sister. seriously neil. tyhis car is coming along. seems to be running a little lean and stumbles a little at about 2800 rpms or so. but i'm getting closer. thanks for all the help [/quote] LOL! Hopefully she never reads your post! The cable angle is critical for smooth ( and light) response. If you still have Sean Malloy's post he has an excellent diagram, basically the cable should pull smoothly through an arc, at mid point the cable to linkage should be at 90 %, not up or down. The spring angle should be 90% at mid point also for smoothest transition. Others may disagree, but this works for me (IMG:style_emoticons/default/biggrin.gif) |
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| CliffBraun |
Aug 18 2009, 01:00 AM
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#6
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Member Group: Members Posts: 252 Joined: 26-April 06 From: San Luis Obispo,ca Member No.: 5,933 Region Association: None |
11 is the right spring rate.
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