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Mon Aug 08, 2011 10:32 am

Ok, go ahead and call me stupid..
I just received my syncrometer and it didnt come with any instructions at all.. How do I check my dual Kadrons?

Edit: This is the one I purchased

Thanks for any help!!

Mon Aug 08, 2011 10:58 am

Kind of self explanatory. Remove your air filters, start the motor, with the linkages disconnected, set the synchrometer on one side and see how much air is being drawn through that carb. Place the tool on the other carb, turn the throttle stop screws to match flow. Re-connect your linkages and adjust them so that the meter reads the same as when they were disconnected....

Mon Aug 08, 2011 11:14 am

Reaper wrote: Kind of self explanatory. Remove your air filters, start the motor, with the linkages disconnected, set the synchrometer on one side and see how much air is being drawn through that carb. Place the tool on the other carb, turn the throttle stop screws to match flow. Re-connect your linkages and adjust them so that the meter reads the same as when they were disconnected....

I thought about that but my choke butterfly protrudes out of the carb about an inch when its fully open and I cant get the rubber from the syncrometer over that?

Thanks again!!

Mon Aug 08, 2011 11:17 am

I used a Pringles potato chip can with the bottom cut out. Fit perfectly on my Kads although I have a Uni-Syn, not the snail type.

Mon Aug 08, 2011 11:24 am

A little more detailed on how I do it. You want to ensure that your valves are set correctly. After you set carb tuning, you can set timing.
1. ensure your linkage Geometry is correct. Both opening and closing equally. Use your peripherial vision.
2. Set baseline tuning on your carb(s)
This means 1.5 turns on your idle screws and 2.5 turns from fully closed on your AF mixture screws. This is called baseline tuning or set up. This will give your carbs a slightly higher than idle running rpm.
3. Place the synchrometer in one carb throat and make sure it is firmly sealed in place while engine is running. Remember the idle screw determines the amount of air is pulled down the throat so you dont have to check both throats on one side carb. Make sure that the synchometer is pulling an even amount of air thru and not jumping up and down on the numbers. This means either turn it up or down dependant on how its moving. Normally you dont need to be higher than 7. Procede to the opposite side and repeat step 3. Once both carbs are pulling the even number on the synch, slowly turn down both sides evenly and slowly till you get your target idle speed. The engine may want to die out so be ready to blip the throttle some.
4. Once you have your target idle speed, adjust your AF mixture screws one by one starting with 1 then 2 and 3 to 4. Fully close the mixture screw till the engine rpm slows down and the engine begins to struggle to run. Open each screw ever slowly till you get the engine even running. Dont be worried, the engine may be increased rpm or decreased rpm. Note: changes in the AF mixture screw can be subtle in changes so listen closely!
5. After each cylinder has been adjust by step #4, adjust rpm speed as necessary to attain target idle rpm.

This is how I do it and its a snap. Everyone may or may not have their own way of doing this but this is how i do it with success. Takes a few min when you get good at it. Good luck!

Well apparrently I spoke too soon. My write up was a general description for weber or dellorto variety carbs and not kadrons. Although most steps will be applicable, there is the balance tube to consider as well.

Mon Aug 08, 2011 11:30 am

You need a piece of rubber hose to extend the carb throat up over the butterflies and filter mounts/studs.

RC

Mon Aug 08, 2011 11:39 am

http://vwparts.aircooled.net/Kadron-Carb-Sync-Adapter-for-Carb-Sync-p/7034-23.htm

Mon Aug 08, 2011 12:13 pm

[email protected] wrote: http://vwparts.aircooled.net/Kadron-Carb-Sync-Adapter-for-Carb-Sync-p/7034-23.htm Sure John....always hawking your own stuff. Oh yeah.....guess I would too!! :lol: :lol: :lol:

Mon Aug 08, 2011 12:24 pm

I mention where there are cheap options (buying a can of Pringles). I have also explained how you can do it with a section of garden hose in my carb sync article.

http://www.aircooled.net/gnrlsite/resource/articles/dualcarb.htm

Mon Aug 08, 2011 12:48 pm

[email protected] wrote: I mention where there are cheap options (buying a can of Pringles). I have also explained how you can do it with a section of garden hose in my carb sync article. Just rattling your cage John. :wink:

Mon Aug 08, 2011 12:55 pm

[email protected] wrote: I mention where there are cheap options (buying a can of Pringles). I have also explained how you can do it with a section of garden hose in my carb sync article.

http://www.aircooled.net/gnrlsite/resource/articles/dualcarb.htm

Those instructions are awesome as long as you know how to read... I pulled a Homer and drove to Alaska with my mixture screws a full exrta turn out! Kept the bugs away! lol

RE: My carb adjustment mishaps

Mon Aug 08, 2011 1:36 pm

:) Have in my Snap On tool box two Unisyns...one round and other oval.

Used a can smaller then a #303 for one application and a #2 with a rubber boot connecter for another need.

Different Carbs...different usage.

Mon Aug 08, 2011 1:59 pm

I think I will be able to use a long funnel and just cut it down so I have the opening I need at both ends because the carb has a bigger opening than the sync... Then I will just put some rubber around the carb end of the funnel for sealing it to the carb opening..

Mon Aug 08, 2011 3:16 pm

If I remember right , you can use a soup can too or it may be a large dog food can.

Casey

Mon Aug 08, 2011 3:28 pm

I used a 2.25" to 2.5" silicone hose reducer to connect to my CB Performance air cleaner bases; a good airtight seal. Maybe you can effect something similar...

Mon Aug 08, 2011 5:09 pm

I tuned mine by ear... not hard to do. Get a rubber fuel hose long enough from the carb to your head. Listen to the pitch, adjust accordingly.

Mine were way off when I got them. Set them and havent looked back... will probably do it again once my engine is back together, damn cam/lifter failure.

Mon Aug 08, 2011 6:00 pm

Ghia Nut wrote: I tuned mine by ear... not hard to do. Get a rubber fuel hose long enough from the carb to your head. Listen to the pitch, adjust accordingly.
That's a cool old school way to do it, quite accurate too - just make sure the carbs don't backfire while the hose is by your ear.

Mon Aug 08, 2011 10:41 pm

OK
I checked it out, a 13.2 oz dog food can [Pedigree "choice cuts in gravy"' with a pop top] Fits almost perfect, Just cut the bottom out with a Hole saw. Then after you get them synced throw the can away and buy the adapter from Aircooled.net

Casey

Tue Aug 09, 2011 5:09 am

Well, I ended up cutting and using a measuring cup.. Then I sanded it perfectly flat on both ends and now it fits like an OJ glove :lol: