Should I buy an adjustable vacuum advance kit? - Page 2 - 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> Hotrodding Basics
User Name
lost password?   |   register now

LinkBack Thread Tools
  #16 (permalink)  
Old 12-11-2011, 10:09 AM
Custom10's Avatar
my KARMA ran over my DOGMA

Last journal entry: SS
Last photo:
Join Date: May 2009
Posts: 1,137
Wiki Edits: 0

Thanks: 27
Thanked 58 Times in 51 Posts
OK well to get it correct, finding true TDC first following the link cobalt provided is essential. The timing marks most likely only go up to about 18 Deg BTDC so unless you have a dial back timing light you should make a timing tape as well, follow the other link directions.

Since your engine is stock you can try about 12 deg BTDC initial timing, yes then add another 22 with mechanical advance for about 34 total all in by 3000 is a good place to start for a heavy truck. These two setting are made with the vacuum advance disconnected. Then add in another 14 with vacuum advance for a total of about 48.

First off after you are confident that the timing marks are OK check and see what you have now as far as total mechanical advance and total vacuum advance. Then you can determine if you need to tweak the distributor. It is best to find out these values first then you can go from there. Post some results after you check em out.

It is a good idea to pull the distributor and check it out for wear and clean it up. If you find it to be worn out then that skip white 6500 is an excellent value, I would not bother trying to rebuild the OEM when you can get an new one for less than 50 bucks, thats just me. Some more links:

Generally speaking with your stock 454 you should not need allot of modifications to your distributor, I am not sure that an adjustable can is really necessary in your case but it certainly won't hurt to have one in there and doing so will give you a chance to inspect the other working functions of the HEI as well as ensure your timing is setup accurately and to your liking Take some timing readings and post them if you are so inclined, good luck.


Reply With Quote Quick reply to this message
Sponsored Links

Recent Hotrodding Basics 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
MSD Pro Billet - which adjustable Vacuum Advance? Big Mouse Engine 11 10-15-2010 07:38 AM
adjustable vacuum advance brian400ex Engine 5 05-06-2009 11:10 PM
adjustable vacuum advance ss396si Engine 1 04-07-2008 07:57 PM
adjustable vac. advance for msd? ocbaud Engine 1 06-13-2004 06:47 PM
ok to use same vacuum line for vacuum advance and tranny vacuum modulator? brian400ex Engine 4 02-19-2003 02:25 PM

All times are GMT -6. The time now is 08:57 PM.

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.