Carb/FI synchronizer ?

[rockitansky]

Is there a throttle body sync gauge set that I can use for an old Honda twin w/ carbs as well as my 4 cyl fuel injected FJR?

THX ALL!

 

[rickysnickers]

Yep, this...www.carbtune.com

 

[BkerChuck]

I have a Motion Pro unit that works well on the FJR and vintage Honda CB400F.

 

[SLK50]

Carbtune is definitely they way to go.

 

[stose85]

+1 on the Morgan Carbtuner. I bought mine direct from England and had it in a little over a week. I think all said and done it cost $98 with shipping.

 

[lucky boy]

https://thedigisync.com/digi-sync-top-.page.html

How about the digisync, works great

 

[N4HHE]

Any 4 channel sync tool should work on only 2 channels.

 

[PhilJet09]

I made my own expanded scale sync tool. It'd be even easier to build a two port version.

 

[N4HHE]

Used ATF as the working fluid? Are those wire ties at the top pinching the tubes to create a restriction orifice?

Long long time ago I tried similar using motor oil. Didn't work, the vacuum sucked the oil apart and into my twin cylinder engine. Before I knew of the need for restrictive orifices. So about $25 later I bought one using mercury from JC Whitney. Thats when I learned about restrictors.

 

[mcatrophy]

Made one very similar to Philjet09's. I used engine oil as the working fluid. Worked very well, no extra damping needed.

(Click on image for larger view)

 

[Mr_Canoehead]

Another +1 on Morgan Carbtune. Stay away from TwinMax.

 

[TownsendsFJR1300]

Carbtune, NO fluids, very accurate. Paid for itself many times over....

 

[PhilJet09]

Used ATF as the working fluid? Are those wire ties at the top pinching the tubes to create a restriction orifice?
Long long time ago I tried similar using motor oil. Didn't work, the vacuum sucked the oil apart and into my twin cylinder engine. Before I knew of the need for restrictive orifices. So about $25 later I bought one using mercury from JC Whitney. Thats when I learned about restrictors.

It's either atf or marvel mystery oil, I don't remember. If you look closely just under my left hand guard, you'll see that I step down from the bigger clear tubing to the next smaller size. I found some rigid plastic tube that fits snug inside the smaller hose, so I can clamp down on that assembly with a double wrap of .020 safety wire without crushing and pinching off the line. Closer to the engine, I step down again to a silicon hose that fits snug over the bleed ports, using the same technique as before to join the different size lines. All of that together may constitute a restrictive orifice. All I can tell you is that it works well and I've never sucked the oil into my engine. I vacuum tested the assembly after I built it and it held a vacuum for a long long time, so I'm confident with my connections.