Throttle return spring question
03-19-2005, 08:17 PM
#1
Drifting
Thread Starter
Member Since: Jan 2002
Location: Northampton Ma
Posts: 1,484
Likes: 0
Received 0 Likes
on
0 Posts
Throttle return spring question
I installed and adjusted the carb linkage on my new 383 with a Speed Demon 750 today. My question is do I need to install a throttle return spring? The linkage and throttle blades return to the "off" (closed) postion as soon as I let go of the throttle, even from WOT. But, will it do this once I have the motor running? I didn't know if maybe the Speed Demon had a built in throttle return. Or am I missing something here? Someone please enlighten me 
Thanks in advance
Thanks in advance
03-19-2005, 08:23 PM
#2
Race Director
yes absolutely....and it should be a double spring (one inside the other) i had to mount my spring so it was up by the 2nd intake bolt from the front.
[IMG]
[/IMG]
[IMG]
[/IMG]
Last edited by bobs77vet; 03-19-2005 at 08:27 PM.
03-19-2005, 08:25 PM
#3
Tech Contributor
Member Since: Aug 1999
Location: At my Bar drinking and wrenching in Lafayette Colorado
Posts: 13,687
Received 4,970 Likes
on
1,953 Posts
Yes. Absolutely. You need a throttle return spring. The spring on the throttle shaft is not designed or intended to provide safe and consistent throttle return - Barry Grant even makes a point of this in their otherwise pretty poor installation instructions.
03-19-2005, 08:25 PM
#4
Yes! and you actually need two. Do not rely on the spring built into the carb. You need two return springs, they are wound differently and typical one is placed inside the other. This is a saftey feature. Since the springs are wound different they break at different stress points and age.
03-19-2005, 08:27 PM
#5
Tech Contributor
Member Since: Aug 1999
Location: At my Bar drinking and wrenching in Lafayette Colorado
Posts: 13,687
Received 4,970 Likes
on
1,953 Posts
Hey Bob -
That's pretty funny... we both said exactly the same thing at the same time without seeing each other's posts before they went up...
That's pretty funny... we both said exactly the same thing at the same time without seeing each other's posts before they went up...
03-19-2005, 08:33 PM
#6
Race Director
Originally Posted by lars
Hey Bob -
That's pretty funny... we both said exactly the same thing at the same time without seeing each other's posts before they went up...
That's pretty funny... we both said exactly the same thing at the same time without seeing each other's posts before they went up...
[IMG]
[/IMG]
03-19-2005, 08:35 PM
#7
Drifting
Thread Starter
Member Since: Jan 2002
Location: Northampton Ma
Posts: 1,484
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the replies. I already have the bracket and dual springs, so I'll install them tommorow. Just wanted to be sure that they were neccessary.
Lars- I also setup the carb according to your paper, it was very helpful
Lars- I also setup the carb according to your paper, it was very helpful
03-19-2005, 08:41 PM
#8
Drifting
Thread Starter
Member Since: Jan 2002
Location: Northampton Ma
Posts: 1,484
Likes: 0
Received 0 Likes
on
0 Posts
I noticed that Bob's spring looks much more durable than what I have.
I have something like this: http://www.jegs.com/cgi-bin/ncommerc...29&prmenbr=361 .
Do you guys think that would be sufficient? Maybe something like this might be better? http://www.jegs.com/cgi-bin/ncommerc...63&prmenbr=361
I have something like this: http://www.jegs.com/cgi-bin/ncommerc...29&prmenbr=361 .
Do you guys think that would be sufficient? Maybe something like this might be better? http://www.jegs.com/cgi-bin/ncommerc...63&prmenbr=361
03-19-2005, 09:03 PM
#9
Race Director
i bought the 1st spring one you listed and tossed it ....the one i have on there is now is recycled from the previous carb..
03-19-2005, 09:13 PM
#11
Senior Member since 1492
Originally Posted by lars
- Barry Grant even makes a point of this in their otherwise pretty poor installation instructions.
03-20-2005, 05:13 PM
#13
Melting Slicks
Member Since: Dec 2000
Location: Eastern Connecticut
Posts: 2,198
Likes: 0
Received 2 Likes
on
2 Posts
Originally Posted by Ryan77
I think I will order the second one I listed and toss the one I have. It just looks much stronger and more reliable 
03-20-2005, 05:16 PM
#14
Melting Slicks
Nothing gets your attention more than the throttle going wide open when your not expecting it. The car suddenly seems to have 600 HP and while your thinking about stomping on the clutch or turning off the ign. the world is going by at light speed.
Don't mess with bubba throttle returns.
Don't mess with bubba throttle returns.
03-20-2005, 06:12 PM
#15
Race Director
Originally Posted by joe73vette
The first one is the same as the factory spring. Joe
