What's this then Peter ?

[child of the 70s]

Took my carb off today to give it a clean and see what the hole is that's letting air in

Anyway , what's this "pin" at the end of my finger?  Not the screw.
It's solid, it's not a pipe or tube. Looks just like a solid peg. Only asking as it had a rubber tube over it with a screw in the end to block it off which I thought was pointless ??


And .... The hole letting all the air in is just above it. The 2 holes one over the other. The bottom hole is a threaded hole to mount the auto choke. The top hole is meant to be an inlet, the corresponding part on the choke has a rubber grommet in it.
The choke was removed 2 years ago by hi-tech rolling road. I can only assume he blocked it off, and that's since fallen out? 

[snoopy]

what was the carb off?  the hole by the auto choke mtg looks like a missing sealing plug for a gallery drilling and the bottom brass plug may be a feed to a idle diaphragm that slows the throttle return on the stepped cam when cold to prevent stalling that was removed when the choke went.

[Peter]

Hi Dan

The brass pin is some sort of plug that's used to seal the hole, nothing needs to go on it, and pointless as you say...

The other wierd pair of holes originally were mounting points for the choke housing, I am not sure
what they did, as I have never 'butchered' a carb in this way.....!

Not really sure why it has all been taken off as the choke can be disabled by either removing
the auto choke plastic housing or disconnecting the actuating arn going 'up' to the choke
pivot bar.

If it was fan housing clearance they were after, then just removing the plastic auto choke body would have achieved that.

All in all....... Its a mess!.

Here is one thats still intact.... If you would like we can transfer these bits when we meet up. I will be left with
a pile of crap, but that's what friend's are for 

Peter xx

[child of the 70s]

Yeah I never knew why they took it all off.  But since they were the rolling road people I figured they knew better than me.
I have the choke, I will refit it, but leave it disabled.
And I will let you know how it behaves. 

The offer of leaving you with a pile of useless rubbish is appreciated. But this time I have the bits, however if you feel like donating anymore stuff to me, leaving yourself in the lurch then feel free to drop Stella off anytime.   

[Peter]

No problem Dan,

If you have the bits, then that's a good idea to refit them, I would be interested
to know what size main jets you have in there too.
The top of the carb needs to come off to find them, they are in the bottom of the float bowl. The size
is engraved either on the top or the side of the head...

And a tip, the little rubber cone shaped block off covers VW use on the Solex work far better than
the rubber hose one you have. Not an essential swap, but makes it neater and is a more reliable plug

Peter

[child of the 70s]

I will whizz the top off tomorrow and have a peak inside.
Just using the off the road time to have a tidy up. So may well change the rubber pipe as you suggest.

( just reread my last post, wasnt saying I thought stella was a pile of rubbish !!)

[Peter]

( just reread my last post, wasnt saying I thought stella was a pile of rubbish !!)

Dan...

I know that 

Don't be silly 

[child of the 70s]

Right .... Just took the top off, you can't beat the smell of petrol on your hands.

Anyways....
In this pic you can see all 4 jets.
The two in the bottom of the float bowl are ...
137 nearest the top of the pic. And 140 below it.


And the 2 not in the float bowl are 165 near the top of the pic, and 160 below it.

[Peter]

Thats exactly the jet setup I am running now, upping the 140 to a 142 will give you a better pick up
when you accelerate and the 'kick' as the secondary barrel opens will be more apparent....

Its a lean'ish setup with the 140 and I am running that way for fuel economy, but will be swapping the 142 back in though...

[child of the 70s]

Ooh exciting !! I almost understand !!!
I can see a trip to fishers tomorrow to get a 142 !!!

For fuel economy I will use the Audi 

[Peter]

Hopefully will see you at NEWS Dan 

[child of the 70s]

Yep I'm all booked for it bud.
:-)

[Dave DND]

Peter, is that the same carb that I had a play with for a while ?

If so, then we ought to call it Rebecca, as its certainly doing the rounds !!!

 

[Peter]

Yup 

Its Rebecca...... she's virtually intact, has two throat's and is my spares/experiment source 

[child of the 70s]

there is a diaphram in the choke unit, and it lets the air in at the very bottom of the carb, where it bolts to the manifold.
really finding it interesting having a look at what it all does.
Id always assumed the choke only worked on the bi-metal strip unwinding and opening up the butterfly slowly. seems there is a shed load more going on. !