Efi Throttle Body Synchronization

Diy manometer!

Plenty of videos and stuff to google.

https://www.instructables.com/id/DIY-DualTriple-or-Quad-Carburetor-Sync-Tool/

 

A laptop, Tune ECU, a cable and away you go!


You can see them balanced in the second picture.

 

Bloody typical, just thrown away last weekend a 4 cyl carbtune set after a mate pulled the wrong connection and lost all the Mercury.

Never thought about trying ATF

 

You can do it either way.......

Yes, the EFI bikes have their own built-in vacuum gauges - the MAP sensors (Manifold Absolute Pressure) which adjust fueling by sending their vacuum signals directly to the ECU. This is what TuneECU reads

However the adjustment itself is still mechanical at the throttle mechanism. You have a little spring-loaded screw between the throttle bodies - normally marked with a dab of yellow paint. With a diy manometer you can achieve just as good a result. ATF is viscous enough not to flutter as coloured water (juice?) does.

 

Hi,
here is a link from the triumphrat forum by Forchetto on how to do it with tune ecu a very good guide hope this helps

https://www.triumphrat.net/air-cool...22-balancing-throttle-bodies.html#post2818330

 

Yes it'll be OK, the most important thing is that both cylinders are, as near as possible, identical.

 

Needs to be done with a hot engine. Mine are @ 330
It looks like you are using the Android App, to download a different map or use other functions you will need to use a USB cable.
Link availble here, first post. tuneecu.boards.net/thread/12/bikes-list

 

There is a tune ecu forum now, it aint busy like here, instead you get the makers advice.

 

Just realised you probably can't access the forum, here's the relevant info...

Bonneville 900 (Air Cooled) - USB & Bluetooth *
* Remapping only through USB

You'll need the older windows version (and drivers) for full functionality.

 

Your screen shot shows the ADJUSTMENT screen.
Can you not access the DASHBOARD screen by swiping right (and then right again for the fuel and ignition tables) ?

An other option might be Dealer Tool - but that's also windows PC based or as suggested seek expert advice on the TuneECU forum.

 

Yes it will ! And depending on the vacuum gauge quality and setup ... It will be more accurate than any electronic device.
All fuel systems apart from turbocharged or supercharged , work by vacuum , they suck the air in and this is what needs to be measured by a huge to adjust throttle balance.