Dag, a question on your vacuum equalizer setup

[Mr Steve]

I while ago I read a post where you had basically just connected all the intake vac nipples together.  You said it removed a deceleration pop you had been chasing.  something about evening out vacuum.  How did that work with the petcock?  Or are you running Pingle...  I was wondering if that setup would lessen the diaphragm flutter with the stock, perhaps making the stock more reliable and less needing of regular rebuilds.

[Dag]

Sorry, I haven't seen your post until now...
I have been running with this setup more than one year now, and have not had any popping.
All vacuum ports on the intakes + the petcock are connected together.
I do have some pics of the setup, but I'm on vacation now and did not bring my computer with all my pictures. Using mi iPhone now... Maybe I posted some pics on a earlier thread.

[Mr Steve]

I saw the pictures.   I may try something similar, (not for popping, I solved that).  I'm thinking that if the petcock is using the vacuum across all cyls there would be a lot less diaphragm flutter and therefore a lot less failure of the std petcock.  I'd think it would basically have a stable continuous vacuum.

[Ricky-D]

Six vacuum pulses per two revolutions of the motor versus one pulse per two revolutions.

A plenum would be a very good addition when considering the standard vacuum petcock.

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[fordmano]

That setup sure did smooth out my motor but could NOT build and hold enough Vacuum for the cruise control to operate properly even when using check valve and a vacuum storage tank. I am not using the stock petcock.

[PhredValk]

I figure 5 vacuum lines with check valves going into one will work the cruise control without a tank just fine. If not, I'll install the tank.
Fred.

[Ricky-D]

I think if you plan to do the connect operation you must necessarily use gasoline resistant tubing and also strong enough tubing to handle the vacuum.

I admit I am intrigued with the idea and have thought about it ever since Dag mentioned it long ago in a post.

I was concerned about the possibility of the vacuum originating from one carburetor assembly interfering with another carburetor that is in a different phase.

However, I can still see that with a small enough inside diameter of the tubing that only a little passage of air would be possible due to the short timing of the compression stroke.

Still, my concerns have kept me from trying this out.

Reading that this has caused a motor to run more smoothly stirs my interest again, although my motor surely does run quite smoothly.

It is hard to get a handle on why this would help a motor to run more smoothly.

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[John U.]

That setup sure did smooth out my motor but could NOT build and hold enough Vacuum for the cruise control to operate properly even when using check valve and a vacuum storage tank. I am not using the stock petcock.

I was interested in  Dag's idea when he first posted it also. Matt, can you elaborate on your observations? Are you talking about smoothing out the idle? Any other effects?
Thanks,
John