AirSpeed VW Community Forums

Technical => Engine Tech Forum => Topic started by: DBD on January 18, 2009, 06:11:26 PM

Title: aircare $^%$%^
Post by: DBD on January 18, 2009, 06:11:26 PM

should my stock 1600 with dual solex's (40's) be able to pass aircare?
my numbers are all over the place.
here is my vin number 2102012320 you can check the airecare site to see how "well" it did

methol hydrate??
thanks DBD

Title: Re: aircare $^%$%^
Post by: Bubba on January 18, 2009, 06:32:17 PM

Running rich.  Needs to be properly tuned.

Title: Re: aircare $^%$%^
Post by: Bruce on January 19, 2009, 01:59:38 AM

Kadrons are VERY difficult to pass.  The problem they have is they don't idle on all 4.
A couple of months ago I saw the results of one guy's experiment that had fantastic results with Kads.
Each carb is sitting on a plenum manifold.  The volume of the plenum is too small, and too far up from the valve.  What the guy did was to remove the dividing wall all the way to about

Title: Re: aircare $^%$%^
Post by: Cameron on January 19, 2009, 01:04:41 PM

Another problem with Kadron/Solex carbs is the throttle bushings.  Grab your throttle shafts, and give them a good shake. See if they're worn.

Many of these carbs are very old, and worn now. As the throttle bushings wear, the throttle shaft and butterfly slop around in the carb throat. This makes them hard to tune, at idle. Blip the throttle and everything moves to a different position.

Title: Re: aircare $^%$%^
Post by: Bruce on January 20, 2009, 01:01:54 AM

It's not just old carbs that have worn out throttle shafts, some of the new ones are worse right out of the box.  I recall a few years ago shopping for a used set of Kads at a swap in Seattle.  All of the new ones I found had more slop than the low mileage old ones.

Title: Re: aircare $^%$%^
Post by: DBD on January 20, 2009, 07:20:52 AM

went back to a single carb for the test and wow what a huge difference.
it has now passed
thanks
DBD

Title: Re: aircare $^%$%^
Post by: Bruce on January 20, 2009, 08:52:45 PM

Wow, big difference!  The loaded HC and CO are in the realm of a FI car with a CAT.