Is my timing tab off? - 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 06-14-2011, 03:14 PM
SUX 2BU's Avatar
Registered User
 
Last photo:
Join Date: Sep 2009
Location: British Columbia, Canada
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Is my timing tab off?

My truck runs alright but it can run better. I bought a timing light to see where my timing is at. I put an MSD timing tape on, and made sure it was on correctly, put white out in the groove in my 6.75" balancer and marked the 15 and 38 degree marks because the timing tab I have goes right to the edge of my balancer. I dont' understand that because it then makes it very difficult to read the timing tape!

Anyway, upon using my timing light I find that at the 0 degree mark on the timing tab it shows up at my 38 degree mark on the balancer! That doesn't make any sense so I'm wondering if I have the wrong tab. It's the same I bought the truck with 7 years ago (350 was redone in 1999). Had the cam and heads redone in 2008 and my mechanic mentioned some trouble with the timing but said he got it figured out. I'm wondering what he meant by that now. My truck runs okay but I think there is more power in it. It surges a little at low-RPM cruise, doesn't ping at all even on 87 octane but nose dives some at more than 1/2 throttle then recovers. It's run a best of 14.87.

This is the tab I have:
That's not my motor but it's same tab (the bright, large one)

Motor specs:
60-over 350, Dart Iron Eagle S/S heads (165cc, 1.94/1.50), headers, Eddy 650 carb, alum. dual plane intake, Mallory Unilite HEI, flat-tops, Weiand water pump, stock (as far as I can tell) balancer. The previous heads that were on it were from 1972 so I'm guessing that's the block's date as well.

I know GM used different timing tabs but at what orientation? 12:00, 2:00 and ?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-14-2011, 03:45 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,322
Wiki Edits: 326

Thanks: 841
Thanked 1,153 Times in 952 Posts
http://www.crankshaftcoalition.com/w...op_dead_center
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-14-2011, 08:10 PM
123pugsy's Avatar
HOT ROD...... FROM A CHRYSLER?
 
Last wiki edit: Metal shaping
Last journal entry: FLOOR BEADS
Last photo:
Join Date: Apr 2006
Location: Markham,ON
Age: 52
Posts: 2,429
Wiki Edits: 29

Thanks: 502
Thanked 295 Times in 255 Posts
Quote:
Originally Posted by SUX 2BU
I know GM used different timing tabs but at what orientation? 12:00, 2:00 and ?

Here's the difference:



Is it off by that much?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-15-2011, 12:34 PM
SUX 2BU's Avatar
Registered User
 
Last photo:
Join Date: Sep 2009
Location: British Columbia, Canada
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It does look off by that much! I was thinking I'll check it again with my light and see if the balancer groove is about at the 12:00 position. So either that or my balancer slipped a whole bunch, eh?

Thanks for that link about finding TDC, tech. That procedure would take me an awful long time as I only get an hour or two to work on my truck here and there, so that would be quite a process. Plus having to use a buddy to help out too, as I normally work alone whenever I find the time.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-15-2011, 01:57 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,322
Wiki Edits: 326

Thanks: 841
Thanked 1,153 Times in 952 Posts
Quote:
Originally Posted by SUX 2BU
That procedure would take me an awful long time as I only get an hour or two to work on my truck here and there, so that would be quite a process. Plus having to use a buddy to help out too, as I normally work alone whenever I find the time.
SUCKS 2 B U dude.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-15-2011, 02:26 PM
Greg T's Avatar
www.krusinklassics.net
 
Last photo:
Join Date: Jul 2007
Location: Escanaba, MI.
Age: 61
Posts: 1,160
Wiki Edits: 0

Thanks: 21
Thanked 41 Times in 32 Posts
A piston stop takes about 10 minutes to use and will give you a definitive answer to your quandary. Why would you not just beg, borrow or steal one and use it?


.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-15-2011, 03:24 PM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Nine Mile Falls/Suncrest, WA
Posts: 5,287
Wiki Edits: 9

Thanks: 113
Thanked 139 Times in 130 Posts
Just make one out of an old spark plug...took me about 5 minutes.
Attached Thumbnails
Click image for larger version

Name:	P6160078.JPG
Views:	138
Size:	633.2 KB
ID:	56090  
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-20-2011, 06:58 PM
SUX 2BU's Avatar
Registered User
 
Last photo:
Join Date: Sep 2009
Location: British Columbia, Canada
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
For the $8 they cost, I might as well buy one.

I checked my timing again and the balancer groove is pretty much right at the 12:00 mark. Maybe slightly right of it, so I wonder if I have a balancer that is meant for the 12:00 timing pointer.
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
Timing sbc corvette timing at 12o clock on both gears? 85 vette Engine 21 12-22-2004 09:23 PM
trying to setting the timing on the timing chain and gears on a 74 ply with a 318 ReggieN Engine 1 10-05-2004 08:54 AM
Base Timing - Advance timing chevelle67 Engine 3 05-11-2004 08:45 AM
Trust the timing light or the timing pointer? lluciano77 Engine 6 03-06-2004 02:35 AM
Timing help? Timing bounces and drops?!?! fireforsin Engine 1 09-12-2003 01:32 AM


All times are GMT -6. The time now is 01:21 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.