ELECTRONIC VACUUM GAUGE FOR 6 CIL

[harrimansat]

Hi








Working on.

HARRIMANSAT

[Syscrush]

I just happened upon this while looking for info on vacuum petcock vs. manual. And I can't believe I'm the first to say that this looks pretty groovy!

[EMS]

Hard to say from the picture. Me thinks I would like to have a little more resolution. Seems like you will have a hard time seeing minor differences.

[Syscrush]

Hard to say from the picture. Me thinks I would like to have a little more resolution. Seems like you will have a hard time seeing minor differences.

Maybe it's meant to be helmet-mounted. :)

[EMS]

Ha!

[harrimansat]

http://www.youtube.com/watch?v=rqXEUjR3 ... XaglsRLP9Q















Before adjust...

[NobleHops]

Wow, looks cool!

[barryadam]

harrimansat,

Do you have another plot done after the adjustments?

I am curious to see if the adjustment to #4 brings the vacuum to near-zero at the 240 crank position.

Barry

[harrimansat]

Hi, The tool I had was too big to fit the carbs, I bought the original tool, I will adjust them next week and will post the results.
Regards!

[spencer]

harrimansat, ...
I am curious to see if the adjustment to #4 brings the vacuum to near-zero at the 240 crank position.

Barry

Number four can't be adjusted. It is the reference to which all other carbs must be adjusted. Or did I misunderstand your question?

[barryadam]

Number four can't be adjusted. It is the reference to which all other carbs must be adjusted. Or did I misunderstand your question?

I neglected to consider which one was non-adjustable.
I was referring to number four's drop off at 240 degrees on the graph.
So then once all of the others are adjusted, they should all have the same profile as #4 (i.e 4" Hg of vacuum when the intake valve closes), right?

[spencer]

It is hard to tell, but if you look carefully at the color code on the right side of that plot, the low one is number three. Number four is the first one on the left. This is confirmed by the gauge display, which shows number four is highest, and number three is lowest.

We are not getting a lot of information about this instrument yet, but I think it must be a one of a kind piece. A prototype, if you will. The interesting thing will be to see if it can be produced at an affordable price. The possibilities of what could be done with this technology are very interesting.

[NobleHops]

It is hard to tell, but if you look carefully at the color code on the right side of that plot, the low one is number three. Number four is the first one on the left. This is confirmed by the gauge display, which shows number four is highest, and number three is lowest.

We are not getting a lot of information about this instrument yet, but I think it must be a one of a kind piece. A prototype, if you will. The interesting thing will be to see if it can be produced at an affordable price. The possibilities of what could be done with this technology are very interesting.

Yes, a guy on ADV did a similar thing - designed and built a run of digital synchronizers for twins, then set out to to it again for 4-cylinder bikes. He sold as many of the twins unit as he had the stamina to make before he packed it up in May. It is said that he will resume at some point.

http://advrider.com/forums/showthread.php?t=701625

I have one, it is a dandy tool, easy to use. It would be fantastic to have something similar for the CBX.

N.

[harrimansat]

Yes it works well for 4 cyl and twins. If my CBX were perfect, we should see something like this









It is a prototype, this version has internal lithium battery, adjustable timing light, and inductive rpm clamp.
It has a precision meter rpm to adjust the pilot screws, following the service manual process, + - 50 rpm.
I´m making final version and instruccions manual, it works in 2,3,4 and six cylinder engines.

[harrimansat]

harrimansat,

Do you have another plot done after the adjustments?

I am curious to see if the adjustment to #4 brings the vacuum to near-zero at the 240 crank position.

Barry

In the test, cylinder 3 is conected throught a T hose adaptor to pedcock valve, in the next test, I will connect cylinder 4 directly to the vacuum sincronizer to see what happens.