PDA

View Full Version : Throttle Linkage



ykf7b0
12-31-2020, 11:17 AM
My newly acquired 55 has a Holley 700 cfm carb and rigged up throttle assembly. I know I could get a Lokar set up but I'm curious as to what you guys have for a throttle assembly on your carbureted V8 engines? Pictures would be great if possible. Thanks! Bo

markm
12-31-2020, 12:33 PM
My 56 has a 3x2 intake with 2Jet carbs and 55 has a Tunnel ran with two Holley 600s. Both have modified stock linkage, I use a lot of 1/4 20 Heims joints,from lawnmower shops or Speedway. Lokar and their bling is the supplier of last resort.

ykf7b0
12-31-2020, 09:32 PM
What I have is a mess. 1/4 x 20 threaded rod that is bent into an L shape on the accelerator arm end, on the carburetor end there is a piece threaded onto the rod and that piece is wired to the carburetor. It works but I want to do better!

Dave the Wave
01-01-2021, 02:41 AM
rod, threaded on one end, made for carbs. factory mount thru firewall.

ykf7b0
01-01-2021, 05:20 AM
rod, threaded on one end, made for carbs. factory mount thru firewall.
Dave, if you are using a Holley 4 barrel, how is the rod attached to the carb? Thanks! Bo

Dave the Wave
01-01-2021, 05:54 AM
edelbrock, sorry.

markm
01-01-2021, 09:27 AM
Speedway as tons of slick parts and pieces do this job that work with any carb.

ykf7b0
01-01-2021, 01:38 PM
After a trip to Tractor Supply this is what I came up with. I had to drill and tap the union for the carburetor attachment.

11668

55 Rescue Dog
01-01-2021, 04:04 PM
Sorry, but I would go back to the drawing board on that. Looks like a recipe for unintended acceleration.

markm
01-01-2021, 04:16 PM
Sorry, but I would go back to the drawing board on that. Looks like a recipe for unintended acceleration.

With the Dog on this one, Check this out from Speedway just one of many things they offer.
Part # 721BJGR4


$1.99
each

Rustaddict
01-01-2021, 05:25 PM
East Coast Chevy ( and others ) sell the correct rod that goes from the firewall rod to the carb. I'm using that replacement rod on a Holley with no trouble.

ykf7b0
01-01-2021, 05:45 PM
Sorry, but I would go back to the drawing board on that. Looks like a recipe for unintended acceleration.

I don't understand? I will be using a return spring. ???

ykf7b0
01-01-2021, 05:51 PM
East Coast Chevy ( and others ) sell the correct rod that goes from the firewall rod to the carb. I'm using that replacement rod on a Holley with no trouble.
I bought a set up from Eckler's but I was thinking it must have been for a 1955 Rochester because it didn't correlate to my Holley but I could be missing something on my carb that I'm not aware of.

ykf7b0
01-01-2021, 06:06 PM
[QUOTE=markm;58859]With the Dog on this one, Check this out from Speedway just one of many things they offer.
Part # 721BJGR4


$1.99

Thanks markm, but why would that be better even if it was not a ball joint?

Dave the Wave
01-02-2021, 01:46 AM
here, perfect. ecklers, # 57-B4662-1. and i just saw steel bushings for my carb instead of rubber with a steel insert in it. hhmmm.

markm
01-02-2021, 08:48 AM
I had such good luck on my 55/56 with this stuff I ordered more to do a buddies 58 Apache with a tunnel ram and my dads Mustangs. Smooth operation and no sticking and much cheaper than stuff from Ace hardware.

ykf7b0
01-02-2021, 11:53 AM
I have settled on this for a while and it seems to be fine for the time being. Thanks to all who have chimed in! I feel like I have captured the essence of red neck art!

11672
11671

Dave the Wave
01-02-2021, 12:14 PM
i have my return spring going back towards the firewall to a bracket, bolted to the manifold. it kinda hids it. and, just curios here, should`nt that rod go thru that gig hole somehow that`s right above where you have it attached?,,,,,,,,did ya check for WOT?

ykf7b0
01-02-2021, 01:17 PM
i have my return spring going back towards the firewall to a bracket, bolted to the manifold. it kinda hids it. and, just curios here, should`nt that rod go thru that gig hole somehow that`s right above where you have it attached?,,,,,,,,did ya check for WOT?

I'm not sure of which hole on the carburetor arm the linkage is supposed to be attached but the 1/4 rod fit better in the hole I'm using. I have checked for wot many times and it is adjusted perfectly. I might relocate the spring for aesthetic purposes. Thanks Dave!

Rustaddict
01-02-2021, 05:33 PM
For comparison's sake heres mine. I have the east coast chevy rod. 11673

ykf7b0
01-02-2021, 06:36 PM
I went on Don's East Coast site and haven't been able to find that rod so would you have a part number? I definitely like the spring position better. Are those late 90's vortec heads?

Dave the Wave
01-03-2021, 02:02 AM
it`s not don`s. "east coast chevy/`ol `55", out of doylestown, pa. and is it me? the last photo posted. looks like the linkage on the carb is wide open, and the lever from the firewall is in the ldle position.

ykf7b0
01-03-2021, 04:33 AM
Oh ok Thanks! I saw the throttle on Rustsaddicts car too and I was thinking the same thing except I don't think the firewall lever is in idle position. He must have had someone inside the car when the photo was taken.

55 Rescue Dog
01-03-2021, 06:29 AM
Sure it will work having the throttle return springs pulling back towards the firewall, but I always use the recommended position of mounting the springs in front pulling directly near the linkage or cable. With the rear springs it puts like double the load on the carb throttle shaft, and can accelerate wearing out the shaft pivot bushings. Between the tension from the spring, and the throttle linkage it is putting a bending force on the throttle shaft. With the spring mount forward the linkage is pulling mostly just on the spring itself. I've see it done wrong many times.

ykf7b0
01-03-2021, 07:02 AM
Seems logical.

Dave the Wave
01-03-2021, 07:58 AM
yea, looking at it closer, idle position. and i kinda see what ya mean, tension on the carb.

ykf7b0
01-03-2021, 08:36 AM
It does look cleaner though.

Dave the Wave
01-03-2021, 09:51 AM
doesn`t that carb look wide open?

Rustaddict
01-03-2021, 04:52 PM
The throttle is wide open. I was by myself and checking for wide open throttle when I floored the gas and since I could'nt be at the carb and on the gas pedal at the same time, I leaned out of the car and took a picture while holding the gas to the floor to get the best look i could at where the carb linkage was at when the pedal was on the floor. RD might have a point about the return spring placement. I put it there because I thought it looked neater and is out of the way of my hand when I work the throttle linkage. Those are Vortec heads.

Dave the Wave
01-04-2021, 01:29 AM
to check for WOT, have someone floor it, and look down the carb.

Rustaddict
01-04-2021, 03:38 PM
I dont have any friends. I was doing the best I could with what I have to work with.

55 Rescue Dog
01-04-2021, 04:13 PM
My rescue dog is my best friend, but not much for a helping hand. So when I need to push on any of the brake/throttle/clutch pedals by myself, I simply turn the handle around on my 32" bar clamp. Then brace it against the back of the steering wheel, or the seat, and push it down.
11676

ykf7b0
01-04-2021, 08:14 PM
I dont have any friends. I was doing the best I could with what I have to work with.

Thanks for the picture of the rod and the lead on where to get one for myself my Friend!!!

Rustaddict
01-05-2021, 05:37 AM
You're welcome. I was just kidding I know a few people. One thing I will add is I had to take a die and cut the threads a little farther down the shaft and shorten the threaded end of the rod a little bit to get WOT.