NO VACCUM, how to make it work? - 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> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-28-2006, 09:53 AM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
NO VACCUM, how to make it work?

the diesel engine I swapped in has no useful vaccum to make the modulator work in the TH350 I installed, how can I make the tranny work rigth?, I tried finding a B&M modulink but seems like it is discontinued, any sugestions?
I added weigth to the governor and works fine, the diesel engine has much lower speeds than the gas units, the kickdown still gives me trouble because of linkage geometry but no big deal.
the vaccum for the modulator is what really is causing trouble, what can I do?
how are the supercharged engines doing this task?
thanks.
Augusto.
P.S. how does 31 mpg sounds to you for a daily driver C1500 pickup? this is what this truck is making with the diesel conversion. diesel fuel cost $ 1.02 per galon here.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-29-2006, 02:55 PM
Member
 
Last photo:
Join Date: Feb 2005
Location: chillicothe oh
Age: 47
Posts: 1,445
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
use a vacuum pump with a regulator on the throttle linkage such as gm and ford used on older diesels, all it did was allow higher vac at low throttle pressure ,less at wider openings using a mechanicaly driven pump.Think of it as a tps for older diesels. Only instead of controling current it controlled vac.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-29-2006, 04:22 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,352
Wiki Edits: 31

Thanks: 2
Thanked 53 Times in 49 Posts
scavange junkyards for a '80-'84 Mercedes Benz 300D, in the rear they have auxilery electric vacume pumps that when new can obtain 30 HG, more than what u need. no diesel engine makes any kind of vacume. I'd be concerned also if u have a vac brake booster, need at least 13 HG to make them work right, if ya got a hydraboost, that's a diffrent story.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-29-2006, 05:50 PM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
the alternator has a built in vaccum pump, I'm using it to make the brake booster work, sucks pretty hard, also I have a line connected to the modulator but it has a tee with a small air bleed ( carb jet ) and a plastic gas filter to prevent dirt from going to the pump, this makes the tranny work in a so so fixed manner, maybe half vaccum reachin the modulator, have not measured how much, it is not correct but works, with full vaccum it shifts rigth after taking off, with no vaccum it will not upshift at all, the diesel motor only goes up to 4.000 rpm.
I like the idea of using a valve connected to the throttle, maybe a regular petcock connected to the throttle acting just like a carb's butterfly, this placed instead of the jet, I'm sure it will work, will post later results.
any other tougths?
thanks for helping.
Augusto.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend 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
porting 882s at home,no machine work, rebuild, will it work? what are they capable of Warrant Engine 6 12-27-2005 12:14 AM
Good Grounding can make a difference ep33510 Electrical 2 12-07-2005 07:42 PM
did i make a mistake? akm Hotrodders' Lounge 15 03-04-2004 10:19 PM
will this work on the street?? deuce_454 Engine 19 06-29-2003 02:33 PM
I have a confession to make....... 454impala69 Transmission - Rearend 4 05-06-2002 04:19 PM


All times are GMT -6. The time now is 01:52 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.