69 camaro fuel sending unit ?'s - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- 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
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-19-2006, 10:06 AM
Registered User
 
Last photo:
Join Date: May 2006
Location: Tucson, AZ
Posts: 45
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
69 camaro fuel sending unit ?'s

I want to put a 69 Camaro fuel tank in my 52 Chevy truck. I have questions about the sending unit. What are the two hard lines on the sending unit for? One is clearly for the fuel but the other I don't know. Also does anyone know if this unit will work with my stock guages in the 52? I will be running a carbureted 350 with a stock mechanical pump. I am new here and can use all the help I can get. thanks guys.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-19-2006, 04:05 PM
Deuce's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Choosing a trailer
Last journal entry: Jan 13 2013
Last photo:
Join Date: Aug 2002
Location: Deuceland USA
Age: 66
Posts: 5,657
Wiki Edits: 6

Thanks: 0
Thanked 9 Times in 9 Posts
WELCOME to Hotrodders.com.

One line is for a return line ... the other is a feed line.

The sending unit is 12V ... and a original 52 fuel gauge was 6V

Deuce ...
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-19-2006, 04:51 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

Welcome Aboard!

Confused here..

Are you talking Electrical when you say "hardlines" or plumbing???

The sender in your 69 Camero Tank is a resistive device , referenced to ground...

It is a variable resistor or linear taper, MECHANICALLY mounted to a float device submersed in the media..As the level of the media increases or decreases, the float follows suit, ergo the movable contact on the variable resistor..The resistor is a 3 tab device with 2 stationary posts and a movable contact.

One stationary post will be total resistance of the device referenced to ground..(in most systems this is empty)

The other stationary post is referenced to ground or ground potential. (in most, this is full)

The Movable contact is the wiper in the center that travels between the two stationary posts, and reports the resistive load back to the gauge.

Think of it as a Volume Control on an old radio or TV, (before remote days. ) As you turn the control clockwise it gets louder..as you turn it counter clockwise, the volume goes down..NOW extend the knob to an ARM with a FLOAT on it , in a media..Same result.

The Key to interface is the total resistance of the Sender Vs Total resistance of the gauge. On a system that old I would think the Gauge is a 0 to 30 ohm sender input..and a 69 camero sender MAY also be a 0 to 30 ohm sender..Both must be on the same page to accurately operate , or even function..Here .. Voltage IS NOT an issue..(only at the power to the gauge..the sender does not care..)

So If your gauge is 0 to 30 Ohms..your sender must also be 0 to 30 ohms. To test the sender, remove it, and with your DVOM set for OHMS scale, R X 1, calibrated to 000, place one probe on the sender body, (Ground) and the other probe on the sender terminal..note the reading..It should be 000, or 30 ohms (depending on how the system was wired) If , for instance , It is 000, slowly move the float up..and watch the meter..It should read a steady increase in resistance to to , Say 30 ohms..With that reading, you know two things..It is a 0 to 30 ohm sender...AND it is operable.

If the readings "jump" all over the place or drop in and out, the resistive device is worn past runout..and the sender needs replacement. It should be a steady change if done slowly.

Never put 12 volts on a sender line... UNLESS you wish to run the risk of a crater where your fuel tank used to live..One Spark in a device immersed in 30 gallons of explosive media can result in tragedy..

Your wires coming off the sender are One wire coming from the Tank ground (or ground lug on the fuel pickup/Sender Egress panel) , and the other is the sender wire itself...

This wire will go to the gauge sender terminal Or "S" terminal.

The other will go to hard ground at the frame..Burnish off all the paint and oil, and dirt from that area, add a star and lock washer, and screw or bolt tightly.

If the Resistance matches, your gauge should work totally fine..

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations

Last edited by docvette; 05-19-2006 at 04:52 PM. Reason: I before E...except after a 12 pack...
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-19-2006, 06:33 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Tucson, AZ
Posts: 45
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks guys for the replies. I will look into the ohm reading on the stock gauge. if you have any ideas as to how to do that I am all ears. I will look myself as well. As for the return line on the sender(hard line that carries fuel) is it necessary for my application? Can I just block it off. The tank will have a vented cap. Thanks for all your help.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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
one piece fiberglass front end for 69 camaro??? chevyelc81 Hotrodding Basics 8 05-10-2011 12:39 AM
oil pressure / water temp sending unit tyrol-paul Engine 2 02-18-2005 05:12 PM
oil pressure sending unit fireguy Engine 5 02-11-2005 10:09 AM
'36 P/U, 69 Camaro subrame engine help!!! Apathy93Z Engine 1 12-08-2004 07:54 AM
fuel level sending unit question mike bryan Electrical 3 12-04-2004 11:48 AM


All times are GMT -6. The time now is 06:25 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.