427 BBC tuning help - Page 2 - 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
  #16 (permalink)  
Old 01-08-2012, 08:26 PM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,561
Wiki Edits: 0

Thanks: 3
Thanked 335 Times in 332 Posts
Take the distributor apart and shorten limit the advance curve.

The stock curve will not work.

40deg timing is too much. you want 24-26 base at idle and 38 total.

limit the mechanical curve to 10-12deg

Fix it. Its not that hard.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 01-08-2012, 09:20 PM
Registered User
 
Join Date: Feb 2010
Location: new brunswick,canada
Posts: 98
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
lol looking at other posts looks like this aint the first time you two haven't agreed on total timing in bbc's. i googled it and this seems to be a common debate.

i do agree though that i would like to run a little more advance at idle, i'm going to mess around with it a little more when i get back home , heading up north to go to work for a couple weeks.

i just reallly dont like the idea of messing around with the distributor, is there a kit to buy to shorten the curve or do i actually have to braze the slots in?

when i get home i plan to take it out in the woods for a little test drive, maybe i can get some more tuning done while im out there actually running it instead of these lousy driveway tests. lol
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 01-09-2012, 01:00 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,561
Wiki Edits: 0

Thanks: 3
Thanked 335 Times in 332 Posts
http://www.hotrodders.com/gallery/da...limitlock2.jpg

Not that hard
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 01-09-2012, 05:52 AM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
http://www.chevyhiperformance.com/te...ild/index.html

Here is an example of a dome piston bbc with a set of stock heads requiring 42 degrees of timing for max power.
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 01-09-2012, 08:07 AM
Registered User
 
Last photo:
Join Date: Apr 2011
Location: Southern Arizona
Posts: 205
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Nothing wrong with your timing compromise, IMO. Another thing you could try is a 1" 4 hole spacer on top of that manifold. It could clean up the low end/idle a little for cheap. It did on my tunnel ram, anyway. There have been many apples to apples tests that don't support all the hype about single plane manifolds being so terrible on the bottom end/mid range. Besides, for having your fun, it's an easy give away for how hard it pulls from about 3,500 to 6,500. And that's another reason to keep the total advance at 38 or so as, from my own experience, a couple of brews and some good dirt make the foot heavy and the ears deaf.
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 01-09-2012, 05:07 PM
Registered User
 
Join Date: Feb 2010
Location: new brunswick,canada
Posts: 98
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by speedbump
And that's another reason to keep the total advance at 38 or so as, from my own experience, a couple of brews and some good dirt make the foot heavy and the ears deaf.

amen to that man... lol

when i get back home ill try playing with the vacuum advance a little more and see if i can get the can set to where it needs to be. or maybe ill just put a stop in the vacuum because it would probably be alot easier to get my inital to 24 with that than mess with my distrubutor.

its not just a question of max power, im all for that, but i dont want the engine to turn into a grenade either
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
355 SBC Tuning help jdheff1982 Engine 5 11-27-2011 10:10 AM
Help on Tuning Please.. 66Ponty Engine 8 08-10-2009 11:50 PM
Help tuning my SBC ScottRods2945 Engine 2 05-14-2007 09:26 PM
Help tuning my SBC ScottRods2945 Engine 1 05-14-2007 05:43 PM
New to tuning... wacko86mmm Hotrodding Basics 4 07-16-2004 05:51 AM


All times are GMT -6. The time now is 01:02 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.