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Does a vacuum balance tube exist with three ports?
Posted by: SpyderMan ()
Date: February 09, 2019 10:18AM

I need a vacuum balance tube that has two small ports and on large PCV port. Does this already exist or do I need to just modify one? This is for a two carb motor.

Thanks

Sam Russell
Durham NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Does a vacuum balance tube exist with three ports?
Posted by: davemotohead ()
Date: February 09, 2019 10:22AM

I think they are out there, think I have one or two.





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Does a vacuum balance tube exist with three ports?
Posted by: SpyderMan ()
Date: February 09, 2019 10:25AM

Dave I would be interested if you get a chance to look.

Sam Russell
Durham NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Does a vacuum balance tube exist with three ports?
Posted by: davemotohead ()
Date: February 09, 2019 10:30AM

like this?





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Does a vacuum balance tube exist with three ports?
Posted by: SpyderMan ()
Date: February 09, 2019 10:39AM

Yup, that would do it. PM Sent

Sam Russell
Durham NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Does a vacuum balance tube exist with three ports?
Posted by: MattNall ()
Date: February 09, 2019 10:57AM

I'll bet it off of an engine with A.I.R. ?





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Does a vacuum balance tube exist with three ports?
Posted by: SpyderMan ()
Date: February 09, 2019 11:03AM

That is what I was thinking as well. There is no reason that this LM part will not fit on EM is there?

Sam Russell
Durham NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Does a vacuum balance tube exist with three ports?
Posted by: MattNall ()
Date: February 09, 2019 11:26AM

Should fit.... everything is the same from '61-9





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Does a vacuum balance tube exist with three ports?
Posted by: RexJohnson ()
Date: February 09, 2019 11:32AM

That is an AIR/smog balance tube and it will fit an early just fine. The late balance tubes starting in '65 bent around where the left side upper heater hose would be on the '65 A/C cars and they stayed with that shape thru '69. The three fittings are large PCV, diverter valve and vacuum modulator. I believe they used the same tube for manual trans cars and just plug the extra fitting.

RJ tools
Salem,Oregon

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Re: Does a vacuum balance tube exist with three ports?
Posted by: Lane66m ()
Date: February 09, 2019 01:07PM

I just put on of those tubes on my latest Monza with the Mouse House 110 engine. Going to use 3rd port for vacuum gage under dash. Next to oil pressure gage and volt meter.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp


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Re: Does a vacuum balance tube exist with three ports?
Posted by: SpyderMan ()
Date: February 09, 2019 07:27PM

Dave is going to look and see if has has another one but if any one has a three port balance tube they would part with let me know.

Sam Russell
Durham NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Does a vacuum balance tube exist with three ports?
Posted by: Frank DuVal ()
Date: February 09, 2019 09:51PM

That would be bent to clear 1966 and 1967 AC cars. 1965 had upper vent hose on right side.

Frank DuVal

Fredericksburg, VA

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Re: Does a vacuum balance tube exist with three ports?
Posted by: roger65180 ()
Date: February 10, 2019 06:18AM

what is the reason for the balance tube Sam

Roger R
Madison Wi
62 ct pg turbo
65intercooled 180 4sp,autocrosser
62 Rampy

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Re: Does a vacuum balance tube exist with three ports?
Posted by: RexJohnson ()
Date: February 10, 2019 09:10AM

The '65 upper heater hose on A/C cars is on the driver's side (left) just like the '65 and '66 turbo cars.

RJ tools
Salem,Oregon

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Re: Does a vacuum balance tube exist with three ports?
Posted by: Seth Emerson ()
Date: February 10, 2019 09:54AM

They are not "All" the same, Matt - 140s are shorter because they connect to a secondary on one side.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: Does a vacuum balance tube exist with three ports?
Posted by: cnicol ()
Date: February 10, 2019 09:59AM

Seth Emerson Wrote:
-------------------------------------------------------
> They are not "All" the same, Matt - 140s are
> shorter because they connect to a secondary on one
> side.


Correct, and as I recall, tear-drop air cleaners require a balance tube that drops down low for clearance.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Does a vacuum balance tube exist with three ports?
Posted by: davemotohead ()
Date: February 10, 2019 10:03AM

The one I have here now has the EM style bend to it.





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Does a vacuum balance tube exist with three ports?
Posted by: SpyderMan ()
Date: February 10, 2019 10:34AM

Dave could you post a picture of the whole thing?

Sam Russell
Durham NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Does a vacuum balance tube exist with three ports?
Posted by: vairchet ()
Date: February 10, 2019 11:56AM

Here ya go, both 140hp and 110hp smog style balance tubes (third port is for Powerglide modulator).

Chet in Ramona

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Re: Does a vacuum balance tube exist with three ports?
Posted by: 66vairman ()
Date: February 10, 2019 03:34PM

vairchet Wrote:
-------------------------------------------------------
> Here ya go, both 140hp and 110hp smog style
> balance tubes (third port is for Powerglide
> modulator).

Good catch vairchet. A fellow in SCC has a very nice 66 Monza 140HP, PG, A/C and in 66 Calif exempted A/C cars from the A.I.R. requirment. Being a Monza there is no vacuum gauge port.

Years ago I dug through a box of cross over tubes looking for a 140HP with A/C and the vacuum gauge fitting. I was surprised by the number of variations.

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