283 vacuum advance - 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 01-13-2006, 09:35 PM
Registered User
 
Join Date: Nov 2005
Location: atlanta
Posts: 36
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
283 vacuum advance

so here is the deal fellas. I have been building a 54 chevy 210. I put in a rebuilt 283 with a stock points distributor. I have an edelbrock three deuce intake that was modified ages ago by someone running a 283 in a ford roadster(the guy i bought it from) to take three strombergs instead of three rochesters. So i am running it the same way that he was, running the 2 outside carbs with the center carb blocked off. here is my issue, if you haven t already guessed it. the old 97s have no venturi vacuum, the only vacuum port that i am aware of is on the manifold between the first and center carb...because it is compeltely below the carbs it seems that this isnt a ported vacuum but rather a constant vacuum and would in fact have to be a constant vacuum and would advance the distributor at idle. i am working on digging up the fittings to confirm this...but if this is the case i am looking for suggestions. basically i am looking to find out how to run the vacuum advance on this set up. when i recieved this manifold it the vacuum port was blocked off with what appears to be a compression fitting...oddly enough...as a pipe thread will not fit in it... anyway my point in it being blocked off makes me wonder if he ran a magneto...not that i know anything about mags...but i think they do without a vacuum advance. this is my first car and have learned a lot going along...this maybe something i am starting to understand a little too late. doc vette...hook a brother up
thanks ryan

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-14-2006, 08:34 AM
Registered User
 
Last photo:
Join Date: Nov 2004
Location: Cali
Posts: 994
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Is this a stock engine? What's the manifold vacuum at idle? How much vacuum does it take to run the can? You want to select a can that is all in at idle then hook it to manifold vacuum. If you need to limit the vacuum advance, you can get limiters from guys like this:

http://www.kendrick-auto.com/ignition.htm
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-14-2006, 04:53 PM
Registered User
 
Join Date: Nov 2005
Location: atlanta
Posts: 36
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
it has a mild cam, headers, and this intake ...but other than that the motor is internally stock. i do not have anything that measures the vacuum so i m not sure what it is or what it should be. i am guessing that a stock distributer can works the opposite way of the advance can you suggest?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-14-2006, 06:13 PM
Registered User
 
Last photo:
Join Date: Nov 2004
Location: Cali
Posts: 994
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No, the vacuum advance cans all advance the timing under increasing vacuum. Some start advancing at lower vacuum than others and some advance farther than others. You need to tailor select a vacuum advance can that suits your engine's needs. You can get a wide range of them at a good auto parts store.

Here's a list copied from Lars Grimsrud's excellent Vacuum Advance paper:

http://www.corvettefaq.com/lars.asp

The following listing (Non-HEI) is as follows: The first two part number listings are the two numbers that are most commonly used in a Chevrolet performance application. The B1 can is the most versatile and user-friendly unit for a good performance street engine. As you can see, it was selected by GM for use in most high performance engines due to its ideal specs. The B28 can was used on fuel injected engines and a few select engines that produced very poor vacuum at idle. The advance comes in very quick on this unit too quick for many performance engines. Do not use this very quick unit unless you have a cam/engine combination that really needs an advance like this. It can be used as a tuning aid for problem engines that do not respond well to other timing combinations, and can be successfully used in applications where direct manifold vacuum is applied to the can (see paragraph and discussion on this above)

After this, the listing is by Echlin part number. The Chevrolet applications are listed first by application, followed by a complete listing of all of the units used on any GM product (all GM units are interchangeable, so you can use a Cadillac or GMC Truck unit on your Vette, if thats what you want to do).

Non-HEI Distributors:

P/N ID# Application Starts @ Hg Max Adv (Distr. Degrees @ Hg.)

VC680 B1 1959 63 All Chevrolet 8-11 8 @ 16-18
1964 Corvette exc. FI
1964 Impala, Chevy II
1965 396 High Perf.
1965-67 283, 409
1966-68 327 exc. Powerglide
1967-68 All 396
1969 Corvette 427 High Perf.
1969 396 Exc. High Perf.
1969 Corvette 350 TI
1969-70 302 Camaro
1970 400 4-bbl
1970 396 High Perf.
1970 Corvette 350 High Perf.
1973-74 454 Exc. HEI

VC1810 B28 1965 409 High Perf. 3-5 8 @ 5.75-8
1965 327 High Perf.
1966 327 High Perf.
1964-67 Corvette High Perf. FI

--------------------------------------------------------------------------------------------------------------------------------------------

VC1605 B9 1965 impala 396 Exc. High Perf. 7-9 10.3 @ 16-18
1965 327 All Exc. FI
1969 327 Camaro, Chevelle, Impala
1969-70 Corvette 350 Exc. High Perf.
1969-70 350 4-bbl Premium Fuel
1970 350 Camaro, Chevelle, Impala High Perf.
1971-72 350 2-bbl AT
1971-72 307 All

VC1675 B13 1968 327 Camaro Powerglide 9-11 8 @ 16-18
1968 327 Impala AT
1968 307 AT
1968 302, 307, 327, 350 Camaro, Chevy II
1970 350 Camaro, Chevelle Exc. High Perf.

VC1760 B19 1969 350 Camaro, Chevelle, Impala 4-bbl 5.5-8 12 @ 14-18
1969-70 350 2-bbl

VC1765 B20 1965 396 Impala High Perf 5-7 8 @ 11-13
1966-67 Corvette Exc. High Perf.
1966-67 Impala 427 Exc. High Perf.
1966-68 327 Powerglide Exc. High Perf.
1969 307 All
1969-70 396, 427 Camaro, Chevelle High Perf.
1970 400 2-bbl
1970 307 MT
1973 Camaro 350 High Perf.

VC1801 B21 1971 350 2-bbl 7-9 10 @ 16-18
1971-72 400, 402
1971-72 307 AT

VC1802 B22 1971-72 350 4-bbl 7-9 8 @ 14-16


Other Part Numbers & Specs:

VC700 B3 8-10 11.5 @ 19-21
VC1415 M1 6-8 10 @ 13-15
VC1420 M2 5-7 11 @ 16-17
VC1650 B12 8-10 10 @ 15-17
VC1725 B18 8-10 12 @ 13-16
VC1740 A5 6-8 12 @ 15-17.5
VC1755 A7 8-10 12.5 @ 18-20.5
VC1804 B24 6.5-8.5 10 @ 12-14
VC1805 M13 6-8 12 @ 14.5-15.5
VC1807 B25 5-7 8 @ 13-15
VC1808 B26 5-7 8 @ 11-13
VC1809 B27 5-7 9 @ 10-12
VC1812 B30 5-7 12 @ 11.75-14

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
Vacuum advance hooked up directly to manifold....is this bad????? Steve-0321 Engine 69 03-10-2014 06:10 PM
Distributor Tuning and Theory - Part 1 Rick WI Engine 35 04-26-2011 01:38 AM
Port or Full time vacuum cool rockin daddy Engine 129 10-05-2010 04:00 PM
Vacuum adv.. underdog305 Engine 58 01-30-2007 12:19 PM


All times are GMT -6. The time now is 05:51 AM.


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.