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Anyone ever try the "Synchrometer"?

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Brosky

Brosky

Great Pumpkin
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Yeah, I know, I'm lazy and a gadget freak. I have one of the older style bouncing ball air sync meters, but one of the club guys raved about this synchrometer that he saw someone using one day.

I'm looking for feedback, good or bad. Oh, this is the Stesk SK, made in Germany, not the cheap Chinese version.
 
I've got one, and I'm quite happy with it.
 
Hello all,

I think that a better type of flow meter is the type sold for multi cylinder motorcycles which has a sampling tube for every induction choke.
With this type of meter you do not need to go from one carburettor to the other, but monitor all simultaneously making adjustment much easier. I believe it has been discussed here before but cannot remember when or what forum?
Obviously good quality would be a rquirement as all the sampling stages must be matched or it would be useless. The type I have seen advertised had stainless steel rods in graduated tubes. You would also need to make up some form of attachment to the carburettor intake to attach the tubes.

Alec
 
I agree with Piman.have used one for many years and on various cars,it saves you having to go back and forth-as adjusting one carb or set of carbs usually affects the others and with the tube type you can see whats happening acrossthe whole set up-just tuned a fiat dino with triple webers.It is the recomended tool from most of the manufacturers and not that expensive.has to be cleaned regularly so the rods don't stick and give false readings
 
I also agree with piman, now remembering your triple setup. I would check into the motorcycle setup first.

There are a bunch of them on ebay to check out.
 
Randy Forbes turned me onto the Carbtune . Here is a picture of his in action. click me
 
I've never seen one of these in action. I've basically just used the old Unisyn unit. I also only have two vacuum ports on the carbs, one on the rear and one on the bottom of the front carb for the retard unit.

I was thinking of three synchrometer's at once, that way no moving between carbs and changed settings.

How does using three at once sound?
 
https://cgi.ebay.com/ebaymotors/Vacuum-Ca...112006476QQrdZ1

Most of the motorcycle sets are just vacuum gauges with piping, maybe that's all you need. I really don't know which would be better but I think vacuum-type testers would only be good if each carb is on a separate manifold, otherwise I would expect it to be equal.

The synchrometer measures air flow at each carb inlets. I use mine and have had no trouble getting the two SU's synch'ed up. Three probably not too tough.
 
Peter,

Is yours the SK model? I think that they only make two sizes and the SK is the one needed for the ZS and SU's with the 1 5/8's inlet.

I would imagine that the vacuum holds these in place while you tune? Just trying to envision using multiple units, if I decide to go that route.
 
I think it is but I'll have to go out to the shop and check. I bought it from a VW/Porsche dealer. I hold the unit against the carbs, not vacuum.
 
I've got one, works great! had it for quite a while. Works on air flow through the throttle. I also have a motorcycle(4 pot) balance tool. Prefer the kraut one, as it's easier to use and with the vacuum port comparison kind all you can measure is idle. Some SK's don't have vaccum ports on both throats. (can't remember if webers do, right now, either.)
 
Oh, and what I did is went to a hardware store, got a pcv elbow big enough to cover the throat chamber in the air cleaner lid, glued an oring to the elbow and use it at the air cleaner base, by popping of the air cleaner covers and elements. Fits on all 6 throats that way.
 
Ron,

Do you happen to have a picture of that setup? I think that I know what you did, but I'm not absolutely positive.

Also, are you using Webers? I only have three throats on the ZS 175 CD's.
 
The Synchrometer works fine for me. I think with the tripple carb setup, the airflow is just not enough for the "bouncing pea" gizmo. The Bernnoulli effect is, well, ineffective in this device.

Rob.
 
Rob,

If I remember, you also have the trips. Which carb do you start with doing it one at a time? And what do you think about the possibility of multiple (3) gauges used at the same time?
 
No pictures; be awhile before I get that set up. The plastic elbow and synchrometer are over in my storage garage in Waimanalo, which I usually visit about once a month. Gotta remember to pull them out. I run two Weber 40DCOE's and one SK. Broke the top of one of the Webers and had the SK's so I just swapped one on. Haven't gotten around to getting another top for the Weber. When it broke about 4 years ago, Weber prices had gone astronomical. Hopefully they've come down.
 
Paul:

Yes, I have the Goodparts setup too. Guess I never really though about here to start. I'm pretty sure you know the setup - with the air filters off, have the idle adjusters set on all three carbs so that they just start to lift the throttle shaft, then loosen off the shaft connectors. The three carbs are working independently now. Use the synchrometer and check velocity into each carb. Adjust the idle screws for each carb till they are all reading the same using the synchrometer - don't worry about the idle speed, you can set that later.

O.K. once you have all three carbs running the same velocity, tighten up the throttle shaft connectors and then back off the idle screws on the two outside carbs. Now the idle screw on the center carb is controling all three. Check again with the synchronometer to make sure they are still all reading the same (I found that to get all three the same, I had to have the outside two carbs reading a bit higher before tightening the throttle shaft connectors as there was a bit of slack in them). Now you can put on the air filters and adjust the idle.

Sorry if I'm telling you something you already know. As for using three meters - seems a bit of a waste to me since its so easy to move the synchrometer from one carb to the other. And wouldn't you need three hands? Or a coat of arms perhaps?

Hope that helps.

Rob.
 
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