Kadron Tuning on 3/4 Side

[mpate]

I am running a balance tube on my Kads and can only turn the mixture screw on the 1/2 side as the 3/4 is hidden to close to the upper manifold and shroud due to it not being opposite of the 1/2. How can I set the mixture on the carb or will the balance tube handle it. Any ideas or help. I am about 1.5 turns out, idle around 1050, and the motor runs strong. Once under load it tends to load up in first at 3,200 and beyond. The rest of the gears are fine, until I back off and cruise at 2,000 in 4th and then it stumbles. Any ideas? Timing is around 29 degrees max. advance.
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Matthew Pate
1980 Kombi

[57baja]

It takes a very long and skinny screwdriver to access the screw, but it can be done once you know how to do it. It is accessed from behind the fan shroud. Here's a photo, looking from behind the shroud:

It is essential that the mixture screw is set properly for your carbs to run right. The balance tube won't take up the slack for poor adjustment.

Hope that helps!
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[57baja]

Also... I usually have better luck with the timing a little more advanced.... usually around 31-32 degrees total, but I run fairly low compression, too. Just don't let it start pinging, whatever you do! Your idle jet may be a little off, but you have to have everything else set properly before you start playing with jetting. I don't know what size engine you have, but Kaddies come set up for 1500-1600-ish jetting (#55). If you start playing with larger (or smaller) displacements, a jetting change, coupled with a venturi re-sizing may be in order to get the maximum performance out of your combo.

It's not a big deal, just takes a little know-how.
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[andk5591]

If you havent been there yet - go to AJ Simms site for tuning info. There are some flex shaft screwdrivers that may help you as well with getting to the mix screws.

Also, take a mirror and flashlight and see if the accel pump nozzles are spraying fuel continuously at around 3/4 steady throttle. They aren't supposed to.......
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D-Dubya Manx clone 1914. Ex wifes car.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Ex-wifes car.
66 bug project - Real patina & Suby conversion
There's more, but not keeping them...

[mpate]

The problem is that these are on a manx and I have virtually no room to get my hands behind the shroud due to the rear of the body being in the way. I may have to remove the wheel and work from behind the carb.
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Matthew Pate
1980 Kombi

[andk5591]

I fully understand - I have dual kads on the buggy and jet changes are good for 45 minutes (at least). Once you get your RPMs up, your idle mixture really doesnt make a big difference. But take a look at this thread and see if it may shed some light on what you are experiencing.
http://www.thesamba.com/vw/forum/viewtopic.php?t=398526&highlight=

What was nice is that all this was done on my project which was an engine in the pan. On the buggy I am running 125 mains right now and as soon as I get it out of the back of the garage, I am gonna get a mirror and flashlight and see if it does the same thing. If so, I'll pull the carbs, bend the accel pump nozzles and rejet my mains to 135s and then test it on the dyno. Last fall when I tuned the buggy on the dyno, we were way rich and I had issues with it loading up.....
_________________
D-Dubya Manx clone 1914. Ex wifes car.
Rosie 65 bug - My mostly stock daily driver.
Woodie 69 VW woodie (Hot VWs 7/12).
"John's car" 64 VW woodie - The first ever
Maxine 61 Cal-look bug - Ex-wifes car.
66 bug project - Real patina & Suby conversion
There's more, but not keeping them...

[Racebug57]

[57baja]

I have a favorite screwdriver for this, myself. I, too, have a bus and they're tough.
_________________
KaddieShack.com - Kadron Carburetor Specialists, VW Parts and Accessories
Have fun with the KS crew on Facebook and keep up to date on the latest builds and happenings