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Throttle plate question

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cmm24601
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Throttle plate question

Post #1 by cmm24601 » Sun May 07, 2017 1:58 pm

I have an Autolite 1101 on a 1969 250 Mustang, automatic

I have been tracking down a vacuum leak and the cigar test revealed smoke emitting from around the lever pump. sure enough. The entire throttle plate shimmies back and forth in the carb housing. I replaced the lever pump, but I'm sure of the best way to stop the leak, which is around the throttle shaft. It wiggles less than 1/16" but that can make a big difference, apparently...

I fashioned some c-clamps out of thin washers and added them to the small gap between the lever pump and wall of the carb. There was a noticeable improvement on performance, but it's still not air tight and I don't know how long those washers will last.

Has anyone come across this problem before? Is there something missing?
1969 Mustang Grande
250 inline 6
Automatic Transmission
Autolite 1101 Carb

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wsa111
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Re: Throttle plate question

Post #2 by wsa111 » Sun May 07, 2017 2:09 pm

You have to install a bushing in the base to eliminate the play.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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B RON CO
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Re: Throttle plate question

Post #3 by B RON CO » Sun May 07, 2017 2:25 pm

Hi, X2. The throttle shaft is harder than the base and usually the base has some wear. Any carb guy can install bushings and ream them to the proper size. Good luck
B RON CO. Still workin' on it!

1933 Ford Pickup - 59A Flathead V8
1966 Ford Bronco - U14 - 170/200 Straight 6
1966 Ford Mustang - 289 V8

cmm24601
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Re: Throttle plate question

Post #4 by cmm24601 » Sun May 07, 2017 2:47 pm

By any carb guy do you mean me by my lonesome or a machine shop?
1969 Mustang Grande
250 inline 6
Automatic Transmission
Autolite 1101 Carb

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B RON CO
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Re: Throttle plate question

Post #5 by B RON CO » Sun May 07, 2017 4:56 pm

You can try to find the right parts, I'm sure someone here knows what will work. I mean an old fashioned carburetor shop. Allstate Carburetor by me on Long Island works on all carbs. I would find someone and just bring them the base plate. Good luck
B RON CO. Still workin' on it!

1933 Ford Pickup - 59A Flathead V8
1966 Ford Bronco - U14 - 170/200 Straight 6
1966 Ford Mustang - 289 V8

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wsa111
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Re: Throttle plate question

Post #6 by wsa111 » Sun May 07, 2017 8:41 pm

Allstate carbs are highly recommended.
If you or a friend is a machinist, check out Mike's Carburetor's for necessary parts.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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woodbutcher
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Re: Throttle plate question

Post #7 by woodbutcher » Mon May 08, 2017 1:35 pm

:hmmm: Several years ago,on the hard core tech forum there was an excellent thread on totally redoing a carb.Including the worn shaft bore redo.Unfortunately,I don`t remember the name of the person doing the work.Great write up on the work including great pictures of the process.
Maybe one of the people here can remember who it was,and the name of the thread.If it still exists,it should be entered in the stickies.
Good luck.Have fun.Be safe.
Leo
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck

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chad
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Re: Throttle plate question

Post #8 by chad » Mon May 08, 2017 3:27 pm

"...the worn shaft bore redo…."
Yes! now THAT's a sticky if ever there wuz 1…
(use drill press?)
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", tool boxes, etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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wsa111
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Re: Throttle plate question

Post #9 by wsa111 » Mon May 08, 2017 4:06 pm

I found the source for 5/16's throttle shaft bushings kits.
I just spoke with the fellow & you can order them on ebay or call him direct for the kit. http://www.ebay.com/itm/Carburetor-5-16 ... es&vxp=mtr

Here is the link for the topic on the forum. How do you like that Chad?? Bill
viewtopic.php?f=1&t=63239&p=483428&hilit=bushing#p483428
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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chad
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Re: Throttle plate question

Post #10 by chad » Mon May 08, 2017 5:10 pm

WoW
thnx Bill !
this 1 has a pic
fordsix.com//viewtopic.php?f=5&t=36077&hilit=some+carb+mods+application
a reamer'n bushing creates a DIY project!
Now
If I only hada way to re-jet an RBS (they're pressed in)…

Bringin ol stuff back to life ina beddah format than the oem!
(sounds like the ford6 way !)
:twisted:
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", tool boxes, etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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Re: Throttle plate question

Post #11 by woodbutcher » Tue May 09, 2017 2:15 pm

:beer: Hi Bill.Many thanks for the search.Had that one bookmarked,BUT,the HDD in the computer that it was on took a dump and I lost everything. :thanks: :nod: IF that one could be put in the stickies or the archives,that would be a great help to all.I did`nt realize that that thread was almost 11 years old.
Good luck.Have fun.Be safe.
Leo
"People never lie so much as after a hunt,during a war,or before an election".

Otto von Bismarck

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wsa111
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Re: Throttle plate question

Post #12 by wsa111 » Tue May 09, 2017 3:14 pm

Leo, post is in the tech part of the forum under Misc.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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Re: Throttle plate question

Post #13 by woodbutcher » Tue May 09, 2017 7:15 pm

:D Hi Bill.Thanks for the heads up.I also bookmarked the thread in my favorites.He did some awesome work on that carb.
Good luck.Have fun.Be safe.
Leo
"People never lie so much as after a hunt,during a war,or before an election".

Otto von Bismarck

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lahti35
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Re: Throttle plate question

Post #14 by lahti35 » Wed May 17, 2017 9:29 am

I'm doing this very thing right now... I was able to find a kit for a GM quadrajet carb that also has a 5/16 shaft and comes with 8 correct size bushings and reamer for about $30 on ebay.

Mikes carb's has the bushings but the OD is a funky size and I had a heck of a time finding the right reamer... I did find Oilite bushings in a standard OD off the shelf reamer size also. I ordered two to try with the GM rebuild kit as those are just brass... but splined on the outside for a tight fit.

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Re: Throttle plate question

Post #15 by bubba22349 » Wed May 31, 2017 8:31 pm

Thank you Bill glad to hear there is still a source for the shaft bushings. :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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chad
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Re: Throttle plate question

Post #16 by chad » Tue Jun 04, 2019 9:16 pm

cmm24601 wrote:I have an Autolite 1101 on a 1969 250 Mustang, automatic
I have been tracking down a vacuum leak and the cigar test revealed smoke emitting from around the lever pump. sure enough. The entire throttle plate shimmies back and forth in the carb housing.
Has anyone come across this problem before? Is there something missing?

Bump, bump...
Ja get anywhere?
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", tool boxes, etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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