Been looking in to TB synch. procedures, Twinmax looks nice but I don't know if it is still made, also found a Morgan carbtune that looks quite promising.
You've probably already seen that many people build their own manometers. There are a lot of different styles. From all the research i did before making one, depending on the liquid used, some people have said a more accurate sync can be done with a diy version
I have the Morgan Carbtune and have used it several times. It has performed flawlessly. I have added extensions to the throttle body vacuum ports to make its use easier.
Mine is self made and similar. Except I used denatured alcohol and some color from a sharpie pen. Without color its too difficult to see. The alcohol will not cause any problems if it gets sucked in. No need to have any graduation on the stick or board that holds the tube. You just try to balance both levels as good as possible.
The biggest pain is to install the extension hoses, but you have to do that only once.
I have much love for my Morgan Carbtune. As a nice bonus, it also works great on three and four cylinder bikes.
I see little point in pissing around for hours building a homemade manometer that can easily lead to slurping up an intake full of oil or whatever. You can't get mercury sticks any more, and the twinmax is spendy and limited to two cylinder bikes.
Motion Pro makes a manometer that uses a mysterious fluid that's not mercury. But for the same or less money, get a Morgan Carbtune. You can stick it in a drawer when you're done, it'll last for decades with no need to fart around with fluids.
it works perfectly; much better than my old Motion Pro mercury unit. Plus, there is no liquid to spill or get sucked into your engine. Sent from the UK to California in less than 10 days. Me likes a lot! :thumbup:
Another +1 for the CarbTune. No liquids, no mess, no chance of sucking fluid into the intake, all in a nice compact tool that comes in its own padded carrying case that you can keep in your toolbox. I was nervous at first about ordering something from England, but it arrived really fast, and using your credit card is hassle free.
I recall making one from to bottles with a tube running down into the fluids between them, and then one tube from each going to each TB pulling from the head of air above each bottle. The low pressure would cause fluid to go from one to the other. Micro bubbles in the fluid would tell the direction of flow. A perfect balance could be achieved by having fluid level even and no motion of fluid from one to the other. The bubbles in the transmission fluid used would just vibrate in place back and forth. That was the most accurate tool I used. I now use the Morgan carb tune. It takes up less room to store, and no worries of a tip over causing issues. It does a good enough job.
I question why the air filter has to be removed to sync? It seems to me. That the sync should be better when done with air filter in place. That way the TB are in sync when operating, vs being equal with no intake restrictions.
I question why the air filter has to be removed to sync? It seems to me. That the sync should be better when done with air filter in place. That way the TB are in sync when operating, vs being equal with no intake restrictions.
I always use just my fingers, I am wearing latex free exam gloves while doing such.
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