Author Topic: NOS BJ/BK floats and choke assembly...  (Read 5470 times)

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cjshaker

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Re: NOS BJ/BK floats and choke assembly...
« Reply #15 on: December 12, 2018, 09:02:16 AM »
Sorry if my questions seemed rude.
More of a student just interested in learning the details of early 60’s Ford carbs.
My questions were inappropriate to ask in a for sale ad.

Drew, nothing inappropriate about what you asked. When I get a chance, I'll get the date codes off of them and let you know. That would probably help in identifying the parts more correctly.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

gt350hr

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Re: NOS BJ/BK floats and choke assembly...
« Reply #16 on: December 12, 2018, 11:01:14 AM »
Randy, yes, the green tags had  Autolite stamped in them,but didnt the choke cover have a raised  Autolite casted on it ? I may be thinking of the 4100 carb, but then Doug says I'm never wrong ?

   NO John the choke covers were "regular" Holley. The "flat top" Autolite 4100 carbs did have Autolite on them. The Autolite choke cap is wider than a Holley and IIRC it won't engage the bi metallic spring.  Nothing on a Holley said Autolite as I said before except the tags. In Dougs case the tags would be natural aluminum not green like assembly line carbs were. ( and only "some" of those).
    Randy
   

cjshaker

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Re: NOS BJ/BK floats and choke assembly...
« Reply #17 on: December 13, 2018, 09:16:20 AM »
I'm only posting this picture for Drew.

In the 2 o'clock position, you can see a small 'pointed insert' in the outer ring of the housing that helps identify the lean/rich position on the choke adjustment. I have only seen this on a few vintage Ford carbs, and most certainly NOT on any of the reproductions, or any standard production Holley for that matter. Have you seen this indicator on any of the vintage carbs that you've come across?

The date codes are both the same at 842. I don't know when the BJ/BK carbs were stopped being used in production cars. Maybe this is of some use to you?


« Last Edit: December 13, 2018, 10:20:01 AM by cjshaker »
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

gt350hr

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Re: NOS BJ/BK floats and choke assembly...
« Reply #18 on: December 13, 2018, 11:43:41 AM »
  Doug I have owned "service" BJ/BKs dated 1970. Yours are obviously '68 as service replacements for their last use , the '67 GT500s.
     Randy

Heo

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Re: NOS BJ/BK floats and choke assembly...
« Reply #19 on: December 13, 2018, 04:34:36 PM »
A question those inkstamps and float chamber ventilation is i
a Ford only thing? beacuse there have passen a few of them
through my hand during the year



The defenition of a Gentleman, is a man that can play the accordion.But dont do it

Drew Pojedinec

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Re: NOS BJ/BK floats and choke assembly...
« Reply #20 on: December 13, 2018, 05:58:42 PM »
Fascinating. Just really late over the counter replacements.
Very cool and much appreciated.
That would explain the “some new, some old” situation.

Carl’s carbs don’t have date codes.

And no, I normally don’t see the choke cap like that. But I find super crappy cores most of the time, typically the caps are broken, missing or had been replaced.

gt350hr

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Re: NOS BJ/BK floats and choke assembly...
« Reply #21 on: December 14, 2018, 12:40:48 PM »
  Heo,
     "Back in the day" Holley used ink stamped numbers and letters in their manufacturing processes. It wass not a Ford specific thing. Now that Holley has had SO many ownership changes , those practices have gone by the wayside. lack of stampings is another indicator of a "modern" carb versus an older one. The stampings come into play for those chasing  originality ( concours) more than anyone else.
    Randy

Heo

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Re: NOS BJ/BK floats and choke assembly...
« Reply #22 on: December 14, 2018, 01:32:54 PM »
OK Randy, i just noted somewhere back in my head some carbs with
inkstamp and some with that floatbowl ventilation with that rubber
"seal" but never reflected why some had it and some dont
so i thought now if that was bj/bk specific. Although i doubt
there is a lot of BJ/BK carbs that found its way to Sweden



The defenition of a Gentleman, is a man that can play the accordion.But dont do it

cjshaker

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Re: NOS BJ/BK floats and choke assembly...
« Reply #23 on: December 14, 2018, 02:03:32 PM »
Heo, there were other Ford carbs that had float bowl vents. Some 428 carbs had a vent that was controlled by a flapper valve on an arm. An example can be seen in this article:
http://blog.dearbornclassics.com/carburetors-428/

I can't tell you which carbs did or did not have vents, or what type they used, but they were used. I wasn't even aware that assembly line BJ/BK carbs had the vent that Drew mentioned.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

Heo

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Re: NOS BJ/BK floats and choke assembly...
« Reply #24 on: December 14, 2018, 06:22:14 PM »
That's the vent I'm talking about. A few of them has
passed through my hands during the years.
Well that was then and they are gone now special or not
In those days no one cared about nr correct



The defenition of a Gentleman, is a man that can play the accordion.But dont do it

Drew Pojedinec

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Re: NOS BJ/BK floats and choke assembly...
« Reply #25 on: December 14, 2018, 07:16:09 PM »
All of the factory CJ and GT carbs had a vent that opened at idle.
The Bk/BJ had full time open, external vents on both the primary and secondary bowls.
The earlier -C carbs had the primary vent (full time) like 3x2's had, but only on the primary.

If ya want I'll upload some pictures.  I've got a 66, 67, 68GT, CJ -N, CJ -U, and C3 -C, BK/BJ carbs all here right now.

Heo

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Re: NOS BJ/BK floats and choke assembly...
« Reply #26 on: December 14, 2018, 07:53:03 PM »
Drew, im not sure i want to know that i traded something valuable for a couple of
slotmags or something like that ::)  but post pics, some of the grumpy old men i call
my friends may have that carb he had on the shelf since -82 that have the wrong
throtle  linkage to fit a Chevy



The defenition of a Gentleman, is a man that can play the accordion.But dont do it

Drew Pojedinec

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Re: NOS BJ/BK floats and choke assembly...
« Reply #27 on: December 14, 2018, 10:36:58 PM »
C6 GT 390 carb's bowl vent:

IMG_0337 by Drew Pojedinec, on Flickr

Here are some pictures from Bill's Bk/BJ's

One distinguishing feature is that aside from the regular common, 4160 transfer tube, there is also a "balance" tube which connects the primary and secondary bowls at or below float level.

IMG_0348 by Drew Pojedinec, on Flickr

Original floats I've seen on all original 3x2 carbs and all 63-64 BK/BJ carbs
The static setting for these is to line the solder up with the bottom of the sight hole, NOT level with the roof.

IMG_0349 by Drew Pojedinec, on Flickr

All BK/BJ's I've seen have these bowls.
Three things to note:
-Full time, open vent
-"False" accelerator pump thingy
-Cast circle in the front of the bowl..... What is that for?  Well some late 50's Holleys actually had a float adjuster that could be accessed if you took a plug out from that location.

IMG_0367 by Drew Pojedinec, on Flickr

Shot of the primary and secondary vents, front is just a hole with the sheet metal cap, the secondary is a pressed in brass piece.  I actually make these pieces (not for sale), for when they are missing on originals.

IMG_0384 by Drew Pojedinec, on Flickr

External vent on a -U carb, many early 1850's and lotsa other early carbs have these as well.

IMG_0626 by Drew Pojedinec, on Flickr

*disclaimer*
This comment is in no way related to Doug's carbs, as the dates on his are far later than anything I've seen.
« Last Edit: December 14, 2018, 10:57:15 PM by Drew Pojedinec »

gt350hr

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Re: NOS BJ/BK floats and choke assembly...
« Reply #28 on: December 17, 2018, 01:15:07 PM »
   Drew ,
       It is interesting to note that C5AF BC, BD and BT, BU carbs didn't have the "vents" like the C3AF BJ,BK carbs did.  Nice work on the carbs in the picture.
    Randy