3 deuces- adjustment - 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 01-20-2010, 10:32 AM
rivergunner
 
Join Date: Apr 2009
Location: mondamin iowa
Age: 65
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
3 deuces- adjustment

Help!

I Just Bought A 1930 Ford With A Corvette 327 An Offy High Rise With 3 -2 Barrel Rochester Carbs. The Center Carb Is The Only One Hooked Up And The Car Runs Great. I Would Like To Hook Up The Other Two Carbs But I Am Not Sure About The Adjustments.

The Front And Back Carbs Have No Adjustments Whatsoever On Them But The Middle Carb Has The Basic Stuff. I Bought A 3 Deuce Sync. Tool From Speedway Motors. It Has A Vaccum Ball And All 3 Carbs Are Supossed To Read The Same At About 800 Rpm. The Front And Back Carbs Are The Same With Out Adjustments But The Center Is The Same Except For The Usual Adjustmants.

My Questions Are -- Should The Front And Back Rochesters Have Any Adjustments On Them? Should The Front And Back Carbs Read The Same Vaccum Since They Are Alike And Then Shoul I Adjust The Center Rochester To Match Them At 800 Rpm Since It Is The Only One With The Adjustments?

I Have Rochester Bokks And Have Done Alot Of Reading But Still Am Confused.

Any Help Would Be Appreciated

Thanks
Rivergunner

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-20-2010, 11:27 AM
Registered User
 
Last wiki edit: Mopar tapered axle rear brake conversion
Last journal entry: What I'm doing now...
Last photo:
Join Date: Jan 2002
Posts: 4,267
Wiki Edits: 49

Thanks: 0
Thanked 5 Times in 5 Posts
It sounds like you have the correct outer carbs. Unfortunately I believe you wasted your money on the synchronizer. The proper way to set up Rochester tri-power is just like the factory did it. Use a progressive linkage. Set up this way the outer carbs open at 1/2 to 3/4 throttle (depending on how you adjust the linkage). There is no need to "synchronize" the carbs at all. Now if you were running 6 Strombergs on a log manifold all straight up (no progressive linkage), then the synchronizer would be appropriate, but it is not needed and will do no good with Rochesters set up on a progressive linkage.

The outer carbs on a Rochester 2G tri-power have special (thicker) butterflies which seal completely. By doing this no air/fuel mixture is allowed into the engine at idle therefore no synchronization is necessary. That's why they have no idle circuits. They are designed to open at higher throttle settings, just like the secondaries on a 4 bbl.

This is one style of progressive linkage. As the center carb opens to half throttle it opens the front carb and that one opens the rear carb at the same time. Simple, needs no synchronization and also economical when it comes to gas. Depending on the year of your outer carbs they may have the connection on the opposite side (mine do) but the linkage still works the same way.


Last edited by Centerline; 01-20-2010 at 11:46 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-06-2013, 08:45 PM
Registered User
 
Join Date: Sep 2010
Location: las vegas nevado 89108
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
three deuce adjustment

thank you thank you very much doing a three deuce set up and learned more about the set up building a 33 ford coupe with 350 70 chey hasta later rebel rouser
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-06-2013, 09:18 PM
Registered User
 
Last wiki edit: General Motors transmissions Last photo:
Join Date: Mar 2006
Location: near Yellowstone park
Posts: 4,378
Wiki Edits: 27

Thanks: 12
Thanked 266 Times in 248 Posts
old school carbs

In the old days we just used regular carbs from a 2 barrel engine, just got a bunch of them, and played with the adjustments until it worked. accelerator pump link hole, idle adjustment, jetting or metering rod adjustment, etc.
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
400 Pontiac Valve Adjustment Question?? budthespud Engine 11 04-13-2009 05:01 AM
TH350 shift cable adjustment GUNTHER19820 Transmission - Rearend 2 12-04-2008 05:17 AM
Adjusting olds rockers .... HELP A/G WILLYS Engine 9 08-21-2008 12:22 PM
Timing/carb idle mixture adjustment DENCOUCH Engine 9 07-21-2008 11:50 AM
steering box adjustment oldguy829 Suspension - Brakes - Steering 3 07-03-2006 03:13 PM


All times are GMT -6. The time now is 02:26 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.