vacumm lines??? - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 05-16-2006, 08:15 PM
Registered User
Join Date: May 2006
Location: palm springs
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
vacumm lines???

i am currently rebuilding a 61 impala. and i have two dumb questions 1. i am changing the carb from 2 bbl to 4 bbl and need to know where to hook up the distributer vacumm advance i have a carb mounting post with a hollow stud and i think it goes there. 2. in the front driver side there is a black box with a vacumm hose coming out and running behind the master cylinder but no hooked up to anything where does it go and what is it for???

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 05-16-2006, 08:25 PM
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 67
Posts: 5,106
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I'm not sure what you're dealing with, but the vacuum advance should be hooked up to a source that has vacuum when the motor is idling. What type of carb are you using?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-16-2006, 09:06 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
Last wiki edit: How to find cheap parts
Last journal entry: Found an LQ9 today
Last photo:
Join Date: Dec 2005
Location: Carlisle, PA
Age: 43
Posts: 5,472
Wiki Edits: 16

Thanks: 31
Thanked 52 Times in 44 Posts
Agreed. Your hollow stud should be a manifold vacuum, but there are a couple other ports on the carb that will work. There is usually a big port in the plenum behind the carb, and depending on the carb there are often one or two on the front.

You can get it running without the vacuum advance on (but you'll probably have to advance the timing a bit. Then you can pull caps off of ports on the carb and use your finger or ear to see if there is vacuum at the port at idle. If vacuum only shows up when you crack the throttle, then its ported or venturi vacuum and should stay capped.

You can also often use deductive reasoning. If you turn the carb over there are little passages that would be open to the manifold all the time. Sometimes there is a port directly above or near one of those passages.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
S-10 oil lines NORM47 Engine 1 04-22-2006 07:19 PM
Kerry and jobs overseas... lluciano77 Hotrodders' Lounge 9 12-25-2004 08:59 PM
How flexible do cooling lines need to be? McDeuce Transmission - Rearend 3 03-22-2004 12:36 PM
-AN fittings on transmission cooling lines jamnut Transmission - Rearend 3 07-14-2003 11:07 AM
Brake lines for conversion kit??? ChevyLuv Suspension - Brakes - Steering 9 09-26-2002 08:36 AM

All times are GMT -6. The time now is 10:38 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.