Carb Sync/balancing with standard Vacuum Gauge?

[Guest]

Has anybody every tried balancing their carbs one at a time with a standard vacuum gauge? I'm just wondering if this has been done before? You would have to go through each cylinder 1 at a time and adjust the carb to the desired manifold vacuum.

[rustybronco]

This is what I use...




Works well on VM's. A bit more difficult when used on BS series carbs until you get the hang of it.

[OLDENUFF]

Only problem is when you adjust one carb it also changes the reading on the rest of them.

[1980GS1000E]

Impossible to fine tune that way. You might as well do a bench sync and call it a day.

[Steve]

Since there is no "standard" vacuum, that would be hard to do.

The idea is to get all four to read the same, whatever it is.

As OLDENUFF said, you make one adjustment, it affects all four.

Your best bet would be to take advantage of the Dollar/Pound relationship right now and get the Morgan Carbtune.
Splurge, spend a couple extra bucks and get it complete with carrying case.
At today's rate, that's $101.65 for the package.
Sorry, just noticed your location, that's for US$. That would be CA$100.77.

.

[BassCliff]

Hi,

I agree, yes, it is possible but very inconvenient. The Morgan Carbtune is the best tool for the job. You can use a rack of 4 manual gauges, something like this...



... but you have to be sure and calibrate them all before you use them. The Morgan Carbtune is calibrated at the manufacturer.


Thank you for your indulgence,

BassCliff

[jwhelan65]

I just received a new Morgan and the quality is horrible not sure I would ever buy another. All the intake fittings are plastic and snap off. The lines will not stay on the fittings either. It is a piece of crap.

[BassCliff]

Hi,

I agree, the plastic fittings that come with the Morgan Carbtune are small and very inconvenient to use. That's why I bought a vacuum sync adapter kit from Z1Enterprises.



The Carbtune instrument itself is wonderful. I don't know why they ship it with such cheap plastic vacuum port connectors.


Thank you for your indulgence,

BassCliff

[nejeff]

Hi,

I agree, yes, it is possible but very inconvenient. The Morgan Carbtune is the best tool for the job. You can use a rack of 4 manual gauges, something like this...



... but you have to be sure and calibrate them all before you use them. The Morgan Carbtune is calibrated at the manufacturer.


Thank you for your indulgence,

BassCliff

This is the set I have been using for a year. They seem to work fine. I did not know they needed calibrated. Where can I find the calibration method?

[BassCliff]

Hi,

This is the set I have been using for a year. They seem to work fine. I did not know they needed calibrated. Where can I find the calibration method?

Hook up each gauge individually, one at a time, to the same cylinder. Make sure each gauge reads the same vacuum level. I'm not sure if those particular gauges have any adjustment.



Thank you for your indulgence,

BassCliff

[Steve]

This is the set I have been using for a year. They seem to work fine. I did not know they needed calibrated. Where can I find the calibration method?

Hook up each gauge individually, one at a time, to the same cylinder. Make sure each gauge reads the same vacuum level. I'm not sure if those particular gauges have any adjustment.

Even better, go to the aquarium section of the pet store, get a 4-gang air manifold so you can connect them all to the same source at the same time.

Once they all agree with each other, you will know that any differences that you see are due to different vacuum levels.

.

[nejeff]

Hi,



Hook up each gauge individually, one at a time, to the same cylinder. Make sure each gauge reads the same vacuum level. I'm not sure if those particular gauges have any adjustment.



Thank you for your indulgence,

BassCliff

Thanks, will do that

[nejeff]

Even better, go to the aquarium section of the pet store, get a 4-gang air manifold so you can connect them all to the same source at the same time.

Once they all agree with each other, you will know that any differences that you see are due to different vacuum levels.

.

Also a good tip. A trip to the fish store is in my future anyway

[Steve]

Take a look at rustybronco's setup in post #2, just turn it around so it's one source and four gauges.

.

[Badooka]

http://www.amazon.co.uk/

I got my 12mm colortune for 41$ US delivered.
I'd bet they have a carbtune as well!!!
And yes the 4 gauge set has a calibration screw under the cover- unscrew it and make the adjustment.