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March 08, 2021, 09:55:59 PM

What's this then Peter ?

This is a discussion for the topic What's this then Peter ? on the board Beach Buggy Engine and Exhaust Help.

Author Topic: What's this then Peter ?  (Read 1802 times)

this user is offline Doon L004

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Reply #15 on: March 13, 2013, 12:39:29 PM
Dan

Have you had a look at what primary / secondary idle jets and emulsion tubes are fitted?

There was a thread on the old forum where Peter and I were trying to find out what jetting other single Weber users had.

The link below is a data sheet I have started to put together, it looks like yours has the same baseline jets as mine and Peter's, I got my Weber from Eurocarbs in 2004.

http://www.chris-jordan.org.uk/pdf's/VW%20Weber%20Settings.pdf

Chris


this user is offline Peter

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Reply #16 on: March 13, 2013, 06:55:02 PM
Quote
seems there is a shed load more going on.

Yes I think there is, but it can be much simpler if the whole unit had not been randomly removed in the first place,
leaving an unnoticed, gaping unfilled mounting hole going into the venturi and letting air in....

I have to wonder about the people who did it...

Anyway, all will be fine Dan  ;-)up

Peter

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this user is offline kustom kriss

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Reply #17 on: March 13, 2013, 09:43:55 PM
would the holley 5200 ive got be running the same jets as i believe its basicly the same carb,not checked whats in it just gona see if it starts first before i mess with it


this user is offline Peter

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Reply #18 on: March 13, 2013, 09:53:45 PM
Hi kriss,

I would say that's definitely the wrong way to go about it, as its worth opening the top and taking the jets out
so you have an idea of what's about to happen...

If the jets are too big it will be running rich and backfiring etc, I would have thought it was better to know that
rather than trying to sort things elsewhere.

Its really pretty easy to do and well worth the effort, just my thoughts here though, as if jetting is unknown, specially if they are too small,
the results could be expensive....

Maybe  :) ;-)up
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this user is offline kustom kriss

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Reply #19 on: March 13, 2013, 11:13:12 PM
what would be usual jets for 1600


this user is offline Doon L004

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Reply #20 on: March 14, 2013, 06:44:16 AM
what would be usual jets for 1600

Kriss

The link below gives you the usual jetting for a 1600, the column labelled Eurocarb 2004 is the set up most Webers were sold with.

http://www.chris-jordan.org.uk/pdf's/VW%20Weber%20Settings.pdf

Chris


this user is offline Peter

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Reply #21 on: March 14, 2013, 06:10:58 PM
Just to note....

The entries under Aircooled.net with a primary of 130 and a secondary of 180, I think would be way out,
though can work.

The 130 is definitely too lean when driving on a low throttle, but the 180 would/may balance that out when you step on it!....

I would prefer to jet so that the mixture was ideal over a far wider range and have a fully under control throttle/engine response at all times.

The 137/142 combo does just that  ;-)up

Peter
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this user is offline Doon L004

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Reply #22 on: March 14, 2013, 10:17:24 PM
Peter

I have tried the Aircooled.net settings and you are spot on, it may work in the US with plenty of heat but not in the UK on a cold winters day.

I have run my new 1600cc engine in using the standard 137/140 combo, but intend to try the Eurocarbs 2012 set up with the different idle jets and emulsion tubes to see what the difference is. If anybody on the forum has recently purchased a Weber 32/36 from Eurocarbs I would be interested in hearing how they have got on with their latest set-up.

Chris


this user is offline Peter

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Reply #23 on: March 15, 2013, 05:07:36 PM
Ahh, Yes thanks Chris

I forgot to mention that, as its important to find out in what part of the world some of these details originate, and
that one was glaring at me! :D :D :D :D

The setups will work, but its all about air pressure and temperature that's prevailing at the time.

So far for me, the 137/142 route has been the best yet for my 1600 twin port, but subtle differences in engine setup and internal parts
will have an effect on the final choice for others.

What ever though, it just great to see these posts that can stimulate and help, as its not as hard
as it first seems to be.. And is well within the capabilities of anyone in this forum  ;-)up

Peter
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this user is offline kustom kriss

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Reply #24 on: March 15, 2013, 07:07:23 PM
this could get awkward with chris ;-)up and kriss :D


this user is offline Doon L004

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Reply #25 on: March 15, 2013, 10:38:52 PM
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. !

A friend of mine sent me the link below which explains how Weber's work, you are right there is shed load's of other things going on.

http://www.webercarburatori.com/?p=handbook

Chris


this user is offline Peter

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Reply #26 on: March 17, 2013, 11:25:21 AM
Thats a nice link Chris

It shows the importance of the float bowl level relative to the outlying air correction jets etc...

Mmmm there is indeed a lot going on, mostly it can be easily ensured to be happening, by just
checking all the settings are done properly.

Hopefully whan Dan gets the missing parts back on, things will start to improve and the carb will
setup as it should  ;-)up

Peter
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this user is offline kustom kriss

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Reply #27 on: March 17, 2013, 05:06:09 PM
ive had the carb off today and the jets as follow

primary main jet 130    air corrector 170

secondary main jet 132    air corrector 175

cant see any markings on the idle jets

the pump discharge nozzle 50

cant get emulsion tubes out    how do you get out


this user is offline Peter

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Reply #28 on: March 17, 2013, 06:14:03 PM
Quote
ive had the carb off today and the jets as follow

primary main jet 130    air corrector 170

secondary main jet 132    air corrector 175

cant see any markings on the idle jets

the pump discharge nozzle 50

Sometimes its a case of 'knowing' what engine this came off, as the 32/36 is
a mainstream carb used by car manufacturers world wide, the only bit thats been specially made in out little area of VW buggy's is
the manifold.

But on the strength of these figures I would say its jetted for a smaller engine, ie a 1300 or slightly less. If you run it on
your 1600, it could be that its far too lean across the entire range, as the jets
are BOTH smaller than has been shown with set ups so far.

If you do try it, be very aware of the heat that a lean mixture will generate, very fast...

The emulsion tubes just pull out, from memory, from beneath the air correctors......, they may have corroded in place though!

Peter
« Last Edit: March 17, 2013, 06:16:07 PM by Peter »
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this user is offline kustom kriss

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Reply #29 on: March 17, 2013, 08:38:50 PM
working just down the road from a carb ctr in nottingham tommorow gona nip in see if i can pick up some jets