Home Kadron vacuum port

[vwfan65]

We have talked about this before, and I know the shops that perform the procedure insist that it is akin to brain surgery, but after doing my own engine, body, interior, electrical, and trans work, I think I can handle it. I know that many people have had success, and report that it is a very easy procedure for the mechanically inclined. Anyone care to share the procedure's details for me again? I would much appreciate it. Naysayers and the clueless please buzz off.

[TedzBug]

i tried asking the same thing months ago....to no avail.... couldn't get an answer that seemed solid at all....

It seemed that low bugget was the only "good" way to do it....

I am still hoping i can find a way for now also....
_________________
'75 Super Beetle
http://www.pbase.com/tedzillich/1975_super_beetle

[Rome]

aircooled.net seems to have their own "best" method/location for the port...

[vwfan65]

Well one guy did post some pics and info last time on how he did his. It looked identical to lowbugget's. He said it worked like a champ. I have been looking at my carbs with a fiber optic light and probing passages with a small copper wire. I have studied many pictures of both popular methods, and I am pretty sure I have it figured out. While they both claim to be polar opposites, It appears to me that both methods are actually very similar, but put the port in different places. I will do one this weekend. If it works, I will write an extensive article and publish the hell out of it everywhere I can. Things got so nasty last time, I hope those guys leave us alone this time.
The kadron has two small holes inside by the throttle plate, in addition to the three small holes that are grouped together. The last guy suggested plugging the bottom hole with a little lump of solder tapped in from the top of the passage when the throttle body is removed from the rest of the carb. Then he just removed the brass plug from the top end of the blind passage and popped a vacuum fitting in there. Voila! no vacuum at idle, a good signal at take off, then quickly tapering off as rpm increases. And the other procedure looks to be a straight drill and tap of the same location just straight through the throttle body instead. I still have a lot of research to do, but one of the local VW gurus and machanics said he will help me although is is unaware of the procedure (he's very oldschool but has run his shop for more than 30 years). Even he said he could not imagine that it would be very difficult.
As for the whole fuel vapor thing, I have researched the topic and the diaphragms in vacuum advance distributors are manufactured of fuel resistant material. All of the machanics at my work (certified machanics for coca-cola enterprises) agreed that vacuum advance distributors are manufactured to withstand fuel vapor. They maintain a fleet of 100+ vehicles from big rigs to electric club cars, to forklifts, to minivans, to trucks, to company cars, even a cherry picker, well you get the picture. They are all fully certified and up to date. They know their stuff.
This is not brain surgery. we will get it figured out.

[myolbug]

[Matthew]

I wish that someone that had a set done by AJ or aircooled. net would take some detailed photos and post them on here. If someone out there has a set that were done professionally we'd sure like to see them.

[Frankenbeetle]

[JamesT]

I experimented and found that Kadrons have everything cast into them for the vaccum port except where it exits the carb. I'm pretty sure the average person can do it themselves if they aren't afraid to take the carb apart. Don't sue me if you fuck up your carbs. What I'm about to describe is by no streach of the imagination an expert's advice or even a how to guide. It's just how I got a vaccum port on my kadrons.

I removed the throttle body from the kadron body (just undoing the two screws on the bottom). Looking along where the throttle plate seats against the TB, there's a couple groups of holes. I followed the group containing only two holes (one above and one bellow the TP) to where it goes up into the kadron body. It makes a 90* turn 2/3's of the way up the side of the carb body and ends with either an aluminum or a copper plug. I drilled out the plug and pressed in a peice of tubing. I cleaned out the whole cavity really well with compressed air (and I mean REALLY well) and reassembled the carb. Simple as that.

It's worked on several sets of carbs I've had. Someday, I may get around to posting picture of it, but until I remember, I guess my description will have to do. Just remember, I'm not telling you to do anything. This is just my personal experience.
_________________
-James T

1968 Kombi
1995 Eurovan Camper
2006 Garbage Jetta TDI

[Matthew]

[Max Welton]

It seems unethical whether it is legal or not.

Max
_________________
1967 Type-3 Fastback
Under the Knife https://shoptalkforums.com/viewtopic.php?f=24&t=151582
Home Stretch https://www.thesamba.com/vw/forum/viewtopic.php?t=767836

[TedzBug]

i would imagine it is not patented.... It is a lot like saying that once you teach someone the secrets of body work or transmission work then all the body shops and trans shops will be losing money.....BS..... MOST people will not attempt these things, But for those of us who want to do everything we can ourselves.....

Well, lets just say everyone gets a start somewhere, if no one shared ever shared info, no-one would ever learn anything.
_________________
'75 Super Beetle
http://www.pbase.com/tedzillich/1975_super_beetle

[Eaallred]

I don't think John at Aircooled.Net would care if someone posted pics of how his kadron vacuum ports are done. Might show theres a little more to it than some people think.
_________________
Eric Allred

You have to remember something: Everybody pities the weak; Jealousy you have to earn.

[a_67vdub]

[a_67vdub]

[[email protected]]

I don't care if someone posts a picture of our port. I offerred to post it myself last year, and backed out after getting a lot of crap by people for not being fast enough for their liking. I don't need that crap.

I will say there are a lot of VERY cool products that never made it to market because of the copiers. It's too frustrating to come out with something cool to have some @$$hole ride on your coattails. It's flat out not worth it for that frustration, so we have shelved those ideas for that very reason.

I know I'll get criticized for this, but I am in this hobby for fun, not making the big bucks. When it's not fun or frustrating, I won't do it.

Regarding the vac port mod; it's bittersweet that some of the "experts" that are doing the port mod (incorrectly I might add) were just 18mos ago telling you that you needed 009s as being the best distributor. THAT is what should be questioned; why the change of tune, and why are they all of a sudden the experts when 18mos ago they were so ignorant of this operation? Does someone that bought a 009 18 mos ago get their money back since the information given was incorrect?

The vac signal off the progression port will not work optimally and properly for 2 reasons; I will not get into it here, it's been discussed already at length. It will "work" if your definition of "work" is "kinda works". But it's not to our standards, not even close. It's much easier to put the port on the carb body (5 min tops), but we tried it back in the 90s, and it had it's problems. So why did we choose to abandon that location for one that required a jig and is much more involved and time consuming? It'd be way more profitable to charge $35 for a job that takes 5 min then one that takes almost an hour, so why did we choose to do it the harder way, and continue to do that harder method? Think about that....

John
Aircooled.Net Inc.

[71surfbus]

I`m thinking maybe you ought to post the pictures, then when people miss- drill the carbs you can look at all the flack posts for not showing better pictures or giving better direction.

[A.J.Sims]

That’s why I re-drill the factory vacuum ports that are used in the carbs in Brazil from Brosol . I do have a “FIXTURE” to hold the carbs. This FIXTURE is adjustable to accommodate the changes or core shifting that is vary noticeable on the high quality parts coming out of china now a days.I wish I knew who this expert is that drills into the progression port, because I want to make fun of them too! If I am correct the progression port is on the left side of Kadron throttle bodies and the factory Vacuum port is on the right. Well I guess the other expert is not me.

[Pooter]

So, what is someone to do when they just bought a svda dizzy, and two new throttle bodies? I can't send my carbs off to AJ (I have to go to work tomorrow). and john's option only appears to be available when purchasing new carburetors.

Is there a book that outlines all of the functions of a kadron, the purposes of all of the ports and passages?

[Matthew]

Send your old throttle bodies to A.J. for a vacuum port and rebushing with better-than-factory bushings. In the meantime run your trusty ole 009.

[[email protected]]

I offerred to post pics before, not doing it again after what happened last time. I had people bitching before they were even up!

Since that is what I got for trying to help, I will not try that route anymore. Someone else can put the pics up, but not me.

John
Aircooled.Net Inc.