The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-24-2009, 10:19 AM   #1
big10ratrod77
Registered User
 
big10ratrod77's Avatar
 
Join Date: Aug 2009
Location: hillborough nc
Posts: 410
how do i hook up a vaccume guage

how do i hook up a vaccume guage to my 77 chevy with a stock 350?
__________________
77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin
79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s
81 mercedes 300d 25 MPG
77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded"
73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091
'77 chevy trucks. built to stay tough.
life is short build a hot rod
big10ratrod77 is offline   Reply With Quote
Old 08-24-2009, 10:45 AM   #2
b454rat
Senior Member
 
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,454
Re: how do i hook up a vaccume guage

Find a vacuum port on the carb or intake. I never looked under the hood to see where the line was hooked to, just cut the hose when I took the gauge out.
__________________
2000 GMC CCSB 454/4L80 6” lift SAS
1999 Chevy CCSB 454/NV4500 6” lift
1999 GMC Yukon 350/4L60 4" SAS
b454rat is offline   Reply With Quote
Old 08-24-2009, 12:07 PM   #3
big10ratrod77
Registered User
 
big10ratrod77's Avatar
 
Join Date: Aug 2009
Location: hillborough nc
Posts: 410
Re: how do i hook up a vaccume guage

ok so ether one will work sweet
__________________
77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin
79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s
81 mercedes 300d 25 MPG
77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded"
73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091
'77 chevy trucks. built to stay tough.
life is short build a hot rod
big10ratrod77 is offline   Reply With Quote
Old 08-24-2009, 01:11 PM   #4
79gmcc15
Gettin It One Pice At A Time
 
79gmcc15's Avatar
 
Join Date: Oct 2004
Location: everett, washington
Posts: 2,688
Re: how do i hook up a vaccume guage

Quote:
Originally Posted by big10ratrod77 View Post
ok so ether one will work sweet
Uh, not quite! you will more then likely need non-ported vacuum! find where the PCV filter is connected and use that line. or there is a T fitting behind your carb for your trans *just saw that you had a manual trans so it might not be there but look anyway.*and what not and that is full vacuum. using just any vacuum port will give you false reading!
__________________
RIP ELJAY

Work In Progress 1979 GMC C1500 Trailering Special.
Getting the truck done, one piece at a time.

“You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan

“I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby

Last edited by 79gmcc15; 08-24-2009 at 01:12 PM.
79gmcc15 is offline   Reply With Quote
Old 08-24-2009, 11:47 PM   #5
BAGNDRAGIT
Just Not Low Enough!
 
BAGNDRAGIT's Avatar
 
Join Date: Mar 2009
Location: Phoenix, AZ
Posts: 525
Re: how do i hook up a vaccume guage

Quote:
Originally Posted by 79gmcc15 View Post
Uh, not quite! you will more then likely need non-ported vacuum! find where the PCV filter is connected and use that line. or there is a T fitting behind your carb for your trans *just saw that you had a manual trans so it might not be there but look anyway.*and what not and that is full vacuum. using just any vacuum port will give you false reading!
you got it nailed, you need non-ported vaccum to acheieve proper vaccum readings...
__________________
NEED ELECTRICAL HELP? ASK ME!
67-72 Full Wiring Diagrams
Lots Of Info, TAKE A LOOK
1967 Chevy C-10 Shortbox Bagged 327 4spd
Previous:
1971 Chevy C-10 Short Sep I6 Auto (Traded)
1973 Chevy C-20 *THE REDNECK BATTLE TRUCK*
2001 Chevy Silverado 2Dr 5.3L Shortbox. R.I.P.
1969 Volkswagen Bug
This is my first meeting, I have a horsepower problem.
BAGNDRAGIT is offline   Reply With Quote
Old 08-25-2009, 01:09 AM   #6
BLE 'BURBAN
In the Forgotten far North.
 
BLE 'BURBAN's Avatar
 
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
Re: how do i hook up a vaccume guage

Hooking it directly to a fitting on the intake is the best thing to do so you get a true and accurate intake vaccuum reading. There may very well be an unused & plugged vaccuum port on the intake behind your carb that you can pull and install a hose fitting into.
__________________
1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015
1990 chevy suburban V2500 5.7L
My cluster Mods-Nov 2007
overhead console Stereo install Round 2 Aug 2009
Heated/turn signal mirror upgrade
BLE 'BURBAN is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:13 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com