V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Timing for old engines on today's fuel

Old 10-18-2018, 11:05 AM
  #1  
Junior Member
Thread Starter
 
tmeyer's Avatar
 
Join Date: Oct 2018
Posts: 11
Timing for old engines on today's fuel

I have been a shade tree mechanic for about 40 years. Over the years I have found that older engines, or engines with a lot of mods (cam, intake, ignition) will not run properly with the original factory specs. Also, the fuels of today do not have the same octane as fuels from the 60's.

This said, I have found the best way to set the timing on a carb. setup is to hook up a vacuum gauge to your intake manifold vacuum. Next, start engine and at idle, adjust timing for maximum steady vacuum. Make sure you don't go to far, as the vacuum will become un-stabile if advanced too far. Once you find the max. steady vacuum, back off 2 lbs. of vacuum and lock down the dist.

I have found this method sets the engine where it wants to be, is very simple and no timing light required. After setting, drive and make sure your not getting detonation under heavy acceleration. If detonation is heard, retard timing slightly. If no detonation is heard, your done.
tmeyer is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
IROC4U
Aftermarket Vendor Review
20
11-22-2010 04:15 AM
lizardkng
Aftermarket Vendor Review
0
02-19-2006 11:33 PM
jamesbern
Carburetors
5
12-21-2001 06:35 AM
Jims83TA
Auto Detailing and Appearance
6
02-25-2001 05:52 PM
Jims83TA
Tech / General Engine
4
02-25-2001 02:35 PM


Thread Tools
Search this Thread
Quick Reply: Timing for old engines on today's fuel


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: