dual webbers ,what do you know ?

shane · dual webbers ,what do you know ?

anyone had experiences ,good or bad with dual webbers ?
i have been offered a set,but don't know how reliable they are or how well they keep their tuning ?

Piratekombi

Hmmm, I don't have any (stock Solex) but I gather that they vary.... Some more info might be handy - What type are they? Where were they made? Are they New, Rebuilt, Second-hand?

Good luck! Smile

shane · .

dont know what model they are, but they came off a 2lt buggy
would need to be jetted down, but they are supposed to be in good condition.

Brookie

Webers are great carbies but take a while to tune but once right they can be magic. You will use a little more fuel if you take advantage of mild increase in power but at cruise they will probably be very close to stock.
If I could get a downdraft off a GT Cortina I would put it on a 1600 dual port.

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shane · .

thanks brookie. we havent talked price yet,but i wanted to know more about the webber from those who have had them.they may be more trouble than solex,but the power may be well worth it ,i dont know yet.
cheers

Brookie

I have run Triple 40 and 45 DCOEs, Twin 40 and 45DCOEs, Single Double Barrel Compound Downdraft 28/36DCD and 30/32s made for some Fords.
They and Dell'Orto which are very similar were the high performance carb/s for all the top makes. Only the onset of computer controlled EFI changed their popularity for performance.

As an example if you are familiar with US or Australian engines many Holden red motors were modded with a cam and a Holley 350 CFM.
The 350 CFM is the Cubic feet per Minute they will draw in a special test.

The little 28/36 DCD from a GT Cortina or Escort would do on average 390CFM. On a chassis dyno we could get nearly 9bhp more with the Weber than the Holley. This would be on a 194 ci Holden 6.
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shane

really need to find out the model number dont i ?thanks for that info brookie

Brookie

This will give you an idea if you really need Webers or similar upgrade

http://www.csgnetwork.com/cfmcalc.html

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shane

thanks for that brookie ,i am going to put my standard 30 pict on for now to get me to muresk,but i will do some more reserch before i decide.
cheers

Phat bus

i run twin 40 DCNF webbers on my motor and would never go back to standard unless I was wanting to keep the webbers and selling the car / motor they were on. My fuel consumptions is almost the same as standard but with lots more grunt. You really do need to find out what model webber they are ie DCNF, IDF or IDA's as finding parts can be a bit difficult now days. If the motor your putting the webbers on is much smaller than the motor they came off you may need to change the chokes too. Webbers are back in production again so complete carbies are available now. but parts supply is limited. There is an aftermark twin solex available now days which has very similar performance to the daul Kadon carbies and price is very reasonable. Soyou may want to consider these also.

shane

the people i talk to are either for or against dual carbs,it just seems a shame to have twin port engine and a single carb! the bloke who has them is away for a few weeks ,so i have no more info on sizes,but am keen to find out .
cheers phat bus

Phat bus

True, if you have a motor with twin port heads then twin dual throat carbies will give the best results. If you had a single port motor then dual throat carbies would not gain as impressive results.
A quality set of single throat dual carbies such as Kadrons or the new aftermarket solex should result a reasonable performance improvement for your $ spent over the standard carbies.

Roadcow

Phat Bus has the best set of Webers for a daily driver. A properly set up set of DCNF's are awesome. You can roar up to a stop sign and they won't stumble or spit like IDA's or IDF's will. They just idle away happy as a clam. The most important thing with Dual Carbs is the linkage on the carbs and between the carbs. Once the carbs are jetted properly and in sync make sure the linkage is tight so they will stay oin tune.

Phat bus

True, mine idle fine once my motor is warm. any rough idle with my motor is because of the size of the cam I'm running. My linkages never seem to need adjusting either.

Brookie

This link covers quite a range of Webers and has fully detailed schematics that really shows why they are so good.

http://www.carburetion.com/Weber/weberparts.asp

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Brookie

Link to most popular VW Weber conversion kits.

http://www.webercarburetor.net/volkswagen-weber-carburetors.html

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Brookie

If you really become a Weber fan and why not this will keep you occupied for hours.

http://www.webercarburetor.net/weber-carburetor/index.htm

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Brookie

The post has now been made a sticky- and this adds to links.

http://oldeskool.org/vw-carb-modifications.html

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The Matador

It really depends on which webers you are talking about.

I had a pair of single throat ICT 34's on my old 1776, it was a single port and ran a lot better than the stock carb but no where near the 40dcnf I upgraded to. That again was a good carb, but now i've picked up a motor with twin 40 drla Dell'Ortos which are about the equivalent of modern Weber 44's

If you can post a photo we'd be able to give you more information

here is a link to a weber guide if you cant post pics.

http://www.redlineweber.com/html/Tech/Table_of_contents.htm

this guy has a lot of good info

http://aircooled.net/gnrlsite/resource/articles/t1hpeng.htm

including a pretty good summary of carbs

http://aircooled.net/gnrlsite/resource/articles/carb101selection.htm

If you still have any questions just ask, there are a lot of pretty smart guys on KK that will be happy to help.

It's hard to get people to play with them much these days. The 34's that i had no one would go near. If they are set up right for your motor they will serve you very well.

Good luck