Vacuum Gauge Install - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 07-10-2007, 11:06 PM

If anyone has installed a vac gauge can you tell me how you connected the hose to the back of the vac guage?

Thanks

**'68OrangeSunshine** · 07-11-2007, 05:37 AM

I use copper lines and brass fittings. 1/8" internal diameter, I think. The nylon/plastic broke after a year, so I upgraded. I used a ready-made tap in the Offy intake, and left the carburetor untouched.

skokie · 07-11-2007, 05:32 PM

Anyone have any pics of this?

**'68OrangeSunshine** · 07-12-2007, 05:46 AM

Sorry, I don't have a digital cam. My install was done in the late '70s when even the "Company" didn't have digital imaging.
Simple install. Find a position on either the carb or the intake [best] for a 3/8" brass fitting; run 1/8 copper line from "pickup" to rear of engine, then down to any hole in firewall, bending to position under dash where you want to put your gauge. Tighten it up to air tight and you're good to go.
Mine' s on a '68 C/10 Stepside -- L6 292, Offy intake, Edelbrock 1404 4-Bbl carb, Clifford headers. Gauge is Mooneyes. Indicates 18" Hg @ 700 rpm, no load. 3~5" Hg @ 2000 rpm 45 mph uphill. A jumpy needle means sticking valves. Great gauge.

07-10-2007, 11:06 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Vacuum Gauge Install If anyone has installed a vac gauge can you tell me how you connected the hose to the back of the vac guage? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-11-2007, 05:37 AM	#2
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Re: Vacuum Gauge Install I use copper lines and brass fittings. 1/8" internal diameter, I think. The nylon/plastic broke after a year, so I upgraded. I used a ready-made tap in the Offy intake, and left the carburetor untouched. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

07-11-2007, 05:32 PM	#3
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Re: Vacuum Gauge Install Anyone have any pics of this? __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-12-2007, 05:46 AM	#4
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Re: Vacuum Gauge Install Sorry, I don't have a digital cam. My install was done in the late '70s when even the "Company" didn't have digital imaging. Simple install. Find a position on either the carb or the intake [best] for a 3/8" brass fitting; run 1/8 copper line from "pickup" to rear of engine, then down to any hole in firewall, bending to position under dash where you want to put your gauge. Tighten it up to air tight and you're good to go. Mine' s on a '68 C/10 Stepside -- L6 292, Offy intake, Edelbrock 1404 4-Bbl carb, Clifford headers. Gauge is Mooneyes. Indicates 18" Hg @ 700 rpm, no load. 3~5" Hg @ 2000 rpm 45 mph uphill. A jumpy needle means sticking valves. Great gauge. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

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