dual carbs or single?

jacobroger · Posted: Sat Feb 18, 2006 2:28 pm Post subject: dual carbs or single?

I have a 73 westy with a new 2 litre I have a set of 40mm kadrons and also a nice weber single. I am thinking about putting the single on the bus and putting the duals on my 69 beetle. Any suggestions?
Thanks
jacob

glutamodo · Posted: Sat Feb 18, 2006 3:10 pm Post subject:

In my experinece, I've found that on Buses, duals always are better then single carbs. The long unheated manifolds that single carbs have on there often require that you over-jet the carb to make it run decently, which results in poor fuel economy - especially on the type 4 Bus motors. If you have the proper linkage for type 4, I'd put the duals on there.

-Andy

Schmoburger · Posted: Sat Feb 18, 2006 3:16 pm Post subject:

Yep.. if it aint broke dont fixe it. Smile

A lot of peope on AVD seem to complain about Webbers being a pain in the clacker... Sad

barefootwestie · Posted: Sat Feb 18, 2006 6:19 pm Post subject:

I have a single Weber on my '73 from the PO and I am going back to the dual Solex's. BTW, where in York do you live? I graduated in Rock Hill and worked in York for quite a few years.
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myk648 · Posted: Sat Feb 18, 2006 8:12 pm Post subject:

I too am swithching back to duals. The bus I just bought has a weber progressive on it. I'm going to a set of solex's.

TimGud · Posted: Sat Feb 18, 2006 8:25 pm Post subject:

I've worked on a couple of buses with a weber single carb on them. Stick with the duals!

honeybus · Posted: Mon Feb 20, 2006 6:58 am Post subject:

glutamodo · Posted: Mon Feb 20, 2006 7:19 am Post subject:

clearsurf2001 · Posted: Mon Feb 20, 2006 7:26 am Post subject:

MrBreeze · Posted: Mon Feb 20, 2006 7:29 am Post subject:

Well, I guess I'll add to the common thinking....

My '73 had been converted to a single and I HATED it. I had bought duals to put on, but sold it before I got the chance.

Of course, we all know FI is the way to go anyways Twisted Evil

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DurocShark · Posted: Mon Feb 20, 2006 8:15 am Post subject:

jacobroger: I just emailed you

Keep the Kads! You'll be happier! I believe Bottomend is running the same carbs and is happy with them...
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pyrOman · Posted: Mon Feb 20, 2006 9:33 am Post subject:

The milage I get out of the 30pict "bicycle" carb on the Gutless Wonder is incredible! Shocked

But nothing beats the quick response of dual carbs, specially on a bus! Razz

Had a progressive Webber on the "million mile motor" while it was in the '70 bug. Did excellent, but that carb on the bus always left something to be desired. Confused

But how about this: go ahead and do the changes and experience for yourself the difference. Cool

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Zeen · Posted: Mon Feb 20, 2006 9:37 am Post subject:

Do a search on "icing" before you put a single on the bus. The Type 4 is wider, which means longer runners, which means more prone to icing. You'd be better off putting the single on the beetle engine.
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HereToGo · Samba Member Joined: April 17, 2001 Posts: 142

I keep reading that a single carb is generally bad news for a Type IV, but has anyone devised a carb heat box for the progressive, similar to an aviation engine setup? Leave one end open for intake air, put a flapper valve on it and a cable to regulate the heat from the dashboard.

For the exhaust end, I guess a box could be made to go around the muffler or just let the hose collect the heat like a type I setup.

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Everett

fido · Posted: Tue Feb 21, 2006 6:03 am Post subject:

nice link for that here:

http://crank.org.uk/carb/

I went from weber single to twin dells. Never looked back - world of difference.
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Duncwarw · Samba Member Joined: August 25, 2003 Posts: 3094

Fido, thanks for the link.

As for "Icing", I haven't personally found it to be much of a problem and it has been pretty cold here. At its very worst (about 18°), idle was tricky and it felt like it had a 009 on it. On the road though, not bad.

I have a progressive on a 2L with NO pre-heater and I didn't even fit the bar from the case.

I suspect, like anything else, people who have had real trouble with a progressive, have had other problems too.

No doubt the duals would be better, but the Progressive has a reputation it doesn't deserve. IMHO...
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