Does someone have a clear pic of the throttle return spring bracket? Also what is the finish? Thanks. Gary
Is this what you are referring to? I will let the experts advise on the finish.
Corey
Quote from: Corey Bowcutt on December 16, 2021, 09:14:24 AM
Is this what you are referring to? I will let the experts advise on the finish.
Corey
yes, mine is bent differently but suspect it is just that-bent. disregard the spring.
Now that's a bracket definitely "in the abstract". :o
Quote from: shelbydoug on December 16, 2021, 09:29:49 AM
Now that's a bracket definitely "in the abstract". :o
LOL. I got torches, I got vices, I got tools, I even have a blacksmith I can count on. Just need to make sure I have the correct angle before I go to work. Funny on what people do to make springs work. ::) ::) Gary
Spring changes with the transmission type
Quote from: Coralsnake on December 16, 2021, 09:41:28 AM
Spring changes with the transmission type
Thanks. It is an automatic GT350
Sometimes I look at NPD's catalog for "correct" parts so to speak. I know Scott who has done the catalog for decades and gets the parts for them and when I found incorrect stuff he was good at correcting it in the next catalog. They call the return spring for a 302 4V and 428Cj "concours correct" but there is no application for manual or auto designated so the assumption was just looking at the catalog is the same spring but am aware the catalog isn't the end all for concours correct especially since Pete says the springs are different. Their brackets they do not make a concours correct 68 302 4V. So I'm back to the angle for this bracket and also what is the correct return spring? Thanks. Gary
The production 302 spring is not the same as the Cobra Jet cars. The service part maybe.
Original springs are green and they are not reproduced in the correct size as the oem spring. I have some references to a blue spring, which presumably is different but never seen a documented original.
Quote from: Coralsnake on December 16, 2021, 10:32:57 AM
The production 302 spring is not the same as the Cobra Jet cars. The service part maybe.
Original springs are green and they are not reproduced in the correct size as the oem spring. I have some references to a blue spring, which presumably is different but never seen a documented original.
Out of curiosity from a mechanical standpoint why wouldn't a Holley equipped 68 302 not use the same spring as a Holley equipped 428CJ? Basically the same carb physically and if they used the same return spring bracket why would the carb spring be different. I can understand how the hole placement on an autolite or 2V carb could vary warranting a diff spring but why 2 cars using the same dimensions from return bracket to carb hole on throttle? Were the brackets different on the intake?
Quote from: Coralsnake on December 16, 2021, 10:32:57 AM
The production 302 spring is not the same as the Cobra Jet cars. The service part maybe.
Original springs are green and they are not reproduced in the correct size as the oem spring. I have some references to a blue spring, which presumably is different but never seen a documented original.
The bracket pictured in the reply by Corey B. is IMHO the correct original bracket for a '68 J-code Mustang, Cougar or Shelby GT-350 with automatic and Autolite 4300 4V carburetor. I removed one from the previously untouched '68 J-code 302 that went in my car and used it for a while before switching up the carb (among other things) and making other changes to the engine. As for the spring, I have also seen reference to a light blue spring, I believe Bob Mannel's SBF book mentions it. Unfortunately I did not snap a photo of what I believe was the original spring I used on my car prior to the engine being restored but I do recall a trace of what looked like light blue paint remaining.
As others have mentioned, neither the bracket nor the spring are correctly reproduced at this time.
Terry
I guess you would have to ask the engineers why they choose a different spring. My information is based on what I have seen and researched. You stated the aftermarket parts catalog says they are the same, that is why posted my information.
I will post the measurements of the green spring this afternoon.
I agree with 68gtcoupe the brackets shown in the thread are correct .
I hope these dimensions help. Let me know if you need more.
Corey
Quote from: Corey Bowcutt on December 16, 2021, 11:52:53 AM
I hope these dimensions help. Let me know if you need more.
Corey
perfect. Thanks! Gary
Quote from: Coralsnake on December 16, 2021, 11:51:14 AM
I guess you would have to ask the engineers why they choose a different spring. My information is based on what I have seen and researched. You stated the aftermarket parts catalog says they are the same, that is why posted my information.
I will post the measurements of the green spring this afternoon.
I agree with 68gtcoupe the brackets shown in the thread are correct .
I would appreciate the measurements Pete. To be clear I trust you 100 percent over any references posted in catalogs for parts. Do you know what the finish is on the bracket? phosphate? Gary
On the bracket, typically clear zinc, I have seen some phosphated service parts
I'm guessing the spring was designed for use with the Autolite carb and not changed or updated if the Holley carburetor was used.
On the subject of '68 302 4v, does the angle vary with the intake?
The one I took off of mine, 1) did have a green spring 2) matches the color of the grey bracket posted 3) is at 90° 4) was on the iron 4v manifold with the Autolite carb
Assembly manual lists green spring for stick and blue for automatic, however I've taken off a bunch of originals both transmissions and only ever seen green
The green spring is 20 coils, 1 inch long (w/o hooks) about 1 7/8" overall and approximately 9/16" diameter
I would appreciate confirmation from anyone with a green oem spring or info on the blue spring
I sent you pics of at least 3 ;) ;)
Why do you have to tell everyone?? ;)
I checked the 1968 MPC and there is not a spring with those measurements. The closest one is the C8ZZ-9737-B, but it is different.
Quote from: Coralsnake on December 16, 2021, 05:42:11 PM
The green spring is 20 coils, 1 inch long (w/o hooks) about 1 7/8" overall and approximately 9/16" diameter
I would appreciate confirmation from anyone with a green oem spring or info on the blue spring
I found a photo of the spring that I had snapped several mos ago. I count 20 coils as well. I had painted the spring light blue based on what I thought was correct information at the time. Unfortunately I don't have a "before" photo.
(//)
And you maybe correct...
That is the spring, noticeable by the offset hooks.
I have several photos of originals but its hard to determine the color
I am accepting of blue or green at this point until we find more information
Quote from: Coralsnake on December 17, 2021, 09:44:18 AM
And you maybe correct...
That is the spring, noticeable by the offset hooks.
I have several photos of originals but its hard to determine the color
I am accepting of blue or green at this point until we find more information
That's what I was thinking about the color, i.e., is it blue or green. I agree that for lack of a better description that it is acceptable to call that green but since the blue is so rare, does it really exist or did a color blind person enter that spring as blue in the parts description?
Worse yet, who makes the right matching color paint now?
...and I'm not counting coils. I can't count that high.
Quote from: shelbydoug on December 17, 2021, 10:31:06 AM
Quote from: Coralsnake on December 17, 2021, 09:44:18 AM
And you maybe correct...
That is the spring, noticeable by the offset hooks.
I have several photos of originals but its hard to determine the color
I am accepting of blue or green at this point until we find more information
That's what I was thinking about the color, i.e., is it blue or green. I agree that for lack of a better description that it is acceptable to call that green but since the blue is so rare, does it really exist or did a color blind person enter that spring as blue in the parts description?
Worse yet, who makes the right matching color paint now?
...and I'm not counting coils. I can't count that high.
The question is why hasn't anyone yet read this post and posted a pic of their original spring? I find it hard to believe with all the SAAC members here on the forum nobody with an original spring on their car hasn't posted a pic yet. Gary
How many pictures do you need?
(http://www.saacforum.com/gallery/8-171221113433.png)
(http://www.saacforum.com/gallery/8-171221112758.jpeg)
(http://www.saacforum.com/gallery/8-171221112934.jpeg)
I thought the return spring always attached to the throttle rod?
It does.
It appears there have been some modifications to the bracket and installation in picture 29.
The spring is correct.
Quote from: Coralsnake on December 17, 2021, 11:30:10 AM
(http://www.saacforum.com/gallery/8-171221112934.jpeg)
This pic is great. Thanks.
The pic below is how I mounted my spring to that bracket I had and the throttle linkage. Wrong spring because none were available in 2008.
The bracket in your picture is mounted correctly.
Quote from: Coralsnake on December 17, 2021, 02:03:22 PM
The bracket in your picture is mounted correctly.
thanks Pete.
I had a "history" with that spring. For me they would break at the bracket connection.
Quote from: 68gtcoupe on December 17, 2021, 09:14:31 AM
Quote from: Coralsnake on December 16, 2021, 05:42:11 PM
The green spring is 20 coils, 1 inch long (w/o hooks) about 1 7/8" overall and approximately 9/16" diameter
I would appreciate confirmation from anyone with a green oem spring or info on the blue spring
I found a photo of the spring that I had snapped several mos ago. I count 20 coils as well. I had painted the spring light blue based on what I thought was correct information at the time. Unfortunately I don't have a "before" photo.
(//)
Thanks for the pic. Gary