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TRIPLE CARBYS

Started by Ice , Feb 28 2010 10:10 AM

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59 replies to this topic

#26 _rogered_

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Posted 13 May 2010 - 07:35 PM

stand by

stand by

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#27 _rogered_

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Posted 13 May 2010 - 07:44 PM

just pulling apart now will get some pics

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#28 _rogered_

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Posted 13 May 2010 - 07:59 PM

Picture 002.jpg 433.19K 21 downloads

Picture 002.jpg 433.19K 21 downloads

mate, just pulled these out
is that the washer on the left?
or do i go deeper?

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#29 _BATHURST-32D_

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Posted 13 May 2010 - 08:03 PM

thanks roger, did you get the numbers of the face of your carbys??? are your needles 5h or 6e???

cheers gong

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#30 _rogered_

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Posted 13 May 2010 - 08:06 PM

128 or carbs
just looking know for needle number
do i need the needles out for that?

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#31 _BATHURST-32D_

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Posted 13 May 2010 - 08:08 PM

you will need to take the piston out then pull the needle out and on the side of the needle head will be a number and a letter.

cgong

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#32 _rogered_

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Posted 13 May 2010 - 08:09 PM

^{stand by}

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#33 _rogered_

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Posted 13 May 2010 - 08:18 PM

got it, 5h

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#34 _BATHURST-32D_

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Posted 13 May 2010 - 08:22 PM

great now take your fuel bowl off turn your carby upside down there will be one of two numbers in side A104 or A1O1 then there will be 12 round dots and in the middle of the dots will be a 0 or a 1 can i see a pic of this.

thanks gong

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#35 _rogered_

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Posted 13 May 2010 - 08:27 PM

just measured that washer
0.3mm so thats 11thou, sound about right?

yip,hold on

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#36 _BATHURST-32D_

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Posted 13 May 2010 - 08:30 PM

this is going somewhere mate and it will put some nolidge into how head, it will help me and you just bear with me for a few more questions.

cheers gong

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#37 _rogered_

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Posted 13 May 2010 - 08:40 PM

Picture 008.jpg 436.44K 19 downloads

Picture 007.jpg 430.63K 15 downloads

these arnt that clear, let me try again

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#38 _rogered_

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Posted 13 May 2010 - 08:47 PM

A104 and 0 in middle of dots

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#39 _BATHURST-32D_

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Posted 13 May 2010 - 08:51 PM

around the 7th dot will have a smaller dot on the inside of it and then another one up near the 11 or 12 if you read it like a clock

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#40 _rogered_

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Posted 13 May 2010 - 08:56 PM

Picture 010.jpg 437.87K 8 downloads

Picture 009.jpg 431.75K 15 downloads

Picture 011.jpg 432.37K 15 downloads

8 and 11

the dot is 3/4 the way between 7 and 8 but i call it 8

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#41 _BATHURST-32D_

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Posted 13 May 2010 - 08:57 PM

right, now is your car one of the 308 lsd or 336 lsd???

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#42 _rogered_

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Posted 13 May 2010 - 08:59 PM

3 36

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#43 _BATHURST-32D_

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Posted 13 May 2010 - 09:17 PM

ok then, you have been a great help roger.

here goes, today i started my ck engine with a set of 150 cds dated 128a 128b 128a spent all week cleaning them and another set, the first set with the 128 stamped into them, where date coded just the same as yours the second set was date coded 7-11 with the 1 in the middle, so i put the second set of carbys on thinking these where the right codes for my car, set the seats up just like the ones you have in pic,,, start car runs for a second or 2 then dies,, look in throt, piston is jammed, ply piston away from seat with great force and needle is stuck in seat, pull carbys off,, scratch head for about 2 hours, then go back to parts wash tank to find 3 2mm thick brace washers, but i already had the washers you have in your pic in place, put these brace washers on and try again she runs a treat, then i look on the front of these carbys to find the numbers 236,,, so are these carbys the race batch of 71 bathurst carbys or are thay just another ring in???? that is the reason for all the questions, mabe we need aldo to come in on this before i go useing the 70 date coded ones, is there any carby gurus out there tuned in on this thread, that knows what there talking about, by the way the carby tags i have are riginal 3257 with a big a anb b stamped into them.

thanks heaps for your help.
cheers gong

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#44 _rogered_

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Posted 13 May 2010 - 09:20 PM

My Pleasure, lets hope you get to the bottom of this

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#45 _BATHURST-32D_

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Posted 13 May 2010 - 09:35 PM

hey roger i forgot to tell you, every part you have showed me there looks correct for the date coded 150 cd you have, right needles for a bathurst car, original float, the washer on the plunger of your seat is correct.

cheers gong

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#46 S pack

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Name:Dave
Location:Luggage Point
Car:73 LJ
Joined: 25-January 10

Posted 13 May 2010 - 09:40 PM

G/day Gong

The most common reason a needle becomes jammed in the jet is because the jet hasn't been centered after assembly. The soft aluminium washer you speak of is a sealing washer and has no bearing on the fuel mixture adjustment.

As for the Carbs numbered 236 :dontknow:

Cheers
Dave.

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#47 _BATHURST-32D_

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Posted 13 May 2010 - 09:59 PM

yeh i know, but if you take the seat out and drop a 6e needle down it stops when it hits the bottem, but if you try this with the 5h needle it stops about 10mm short, as this needle is thicker than the 6e,,,, as to the 236 carbys it was the date code of 7,8,9,10 month of 71 that got me more than the 236.

ps mate that alloy washer would still act as a spacer, as the farer away the seat the deeper the needle will need to travel before it shuts the fuel supply off, this is the problem i was haveing before i put these 3 times 2mm brace washers back in the seats[fuel was stopping]

cheers gong

Edited by BATHURST-32D, 13 May 2010 - 10:04 PM.

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#48 S pack

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Name:Dave
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Posted 14 May 2010 - 12:39 AM

yeh i know, but if you take the seat out and drop a 6e needle down it stops when it hits the bottem, but if you try this with the 5h needle it stops about 10mm short, as this needle is thicker than the 6e,,,, as to the 236 carbys it was the date code of 7,8,9,10 month of 71 that got me more than the 236.

ps mate that alloy washer would still act as a spacer, as the farer away the seat the deeper the needle will need to travel before it shuts the fuel supply off, this is the problem i was haveing before i put these 3 times 2mm brace washers back in the seats[fuel was stopping]

cheers gong

Stromberg Metering Needle Specs (diameter) measured at 1/8" intervals from the shoulder (underside of shank).
Measurements are imperial not metric.
5H
1 .0880
2 .0844
3 .0798
4 .0787
5 .0769
6 .0747
7 .0727
8 .0707
9 .0693
10 .0670
11 .0656
12 .0635
13 .0635

6E
1 .0880
2 .0838
3 .0810
4 .0786
5 .0763
6 .0739
7 .0710
8 .0689
9 .0668
10 .0649
11 .0631
12 .0612
13 .0566

As you can see there is bugger all difference in the diameter of the needles.
Remember the jet has a .090" orifice and the thickest part of the needle is .0880". That leaves .002" clearance on both needles.

Both of the above needles use .090" jets so both needles should insert all the way into the jet until the shoulder bottoms out.
You will note the measurement at the shoulder of both needles is the same.
As I said before the aluminium washer has nothing to do with the fuel mixture (jet) adjustment. That job is all taken care of by the jet adjusting screw.
If your 5H needles jam in the jet at about 10mm from the shoulder I would suggest your needles might be bent.
Find a smooth flat piece of glass and roll them across it to see if they are straight or bent.

Cheers
Dave.

Edited by S pack, 14 May 2010 - 12:48 AM.

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#49 _BATHURST-32D_

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Posted 14 May 2010 - 06:40 AM

thanks dave, that is some good info, i will run this around the race track today and see what happens, i will say that the needles i have where brand new from mydel, mabe thay could be the wrong thickness,,,
does anyone have any news on the 236 carby with the 71 cast date.

cheers gong

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#50 warrenm

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Location:Central West NSW
Car:1972 LJ Torana
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Posted 14 May 2010 - 07:23 AM

Just check the size of the needles, as I fitted a set 18 months ago that were supplied from Midels & marked as 5H with new jets, jets were .090" needles were actually .100". Drilled the jets to .100" & all ok.