T-400 hooked to blown 350 - 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 11-06-2009, 08:15 AM
johnnykool6's Avatar
johnnykool6 / fast unlimited
 

Last journal entry: Blown S-10 for sale
Last photo:
Join Date: Nov 2009
Location: Harleysville, Pa.
Age: 54
Posts: 48
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
T-400 hooked to blown 350

Hi guys, new to the site, and hope this is the right place to ask. I'm new to superchargers, and automatic trannys, and heck... Chevy's too! I've built a '85 S-10 with a 6-71 with twin blower Holley 750dp's atop a LT1-350, hooked up through a 5600 stall, to a TH400, then back to 4.88's with a spool. Power transmitted through a shortened 4 link 12 bolt and 29X18.5 Sportsman Pro tires. I'm hoping this is a "fun " little street truck! Those are the basics... Now... questions are; does the vac. mod. on the TH400 get hooked up to the base of the supercharger, where there is only one vac port which is used and harder to get too, or the base of the carb before the blower, which is easier to get too, and has a few ports to choose from. My thought is the first choice (motor vacuum). Does it matter? Shifting manually or auto? Or can it be left disconnected? And do I have to hook up the electronic kickdown if I plan on manually pulling it down? (should have used a 4 speed!! lol) Thanks in advance!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-06-2009, 08:27 AM
Frisco's Avatar
Glad To Be Here
 
Last photo:
Join Date: Nov 2002
Location: Canton, North Carolina
Age: 72
Posts: 2,244
Wiki Edits: 0

Thanks: 0
Thanked 8 Times in 8 Posts
A very good answer can be found HERE. Go to post #5 by Joe Padavano.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-06-2009, 10:11 AM
johnnykool6's Avatar
johnnykool6 / fast unlimited
 

Last journal entry: Blown S-10 for sale
Last photo:
Join Date: Nov 2009
Location: Harleysville, Pa.
Age: 54
Posts: 48
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks, That helps me understand how it works. I wanted to know, through other peoples experiences, where they have theirs hooked up. Since the blower makes vacuum (between the carb and blower) whether at idle or wot, and vacuum to boost as it goes through the rpm range (between the blower and manifold), which is the better spot for the vac. mod. to work best on the street, or doesn't it matter?...
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-06-2009, 05:32 PM
tubbedz's Avatar
Registered User
 
Last photo:
Join Date: Jun 2007
Location: United States
Posts: 120
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
My buddy has been through the same dilema...

Blower transmission shifts soft at low RPM's
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-06-2009, 06:43 PM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,060
Wiki Edits: 1659

Thanks: 316
Thanked 97 Times in 94 Posts
you can not hook the vacuum modulator to a port under the blower where boost pressure will get to the modulator.

i hooked my stuff to a port just below the carbs when i had super charged engines
__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-08-2009, 05:28 AM
johnnykool6's Avatar
johnnykool6 / fast unlimited
 

Last journal entry: Blown S-10 for sale
Last photo:
Join Date: Nov 2009
Location: Harleysville, Pa.
Age: 54
Posts: 48
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
That's the stuff I needed Tubbedz! Also thanks to you Crosley, for my lessons in modulators! You were both very helpful! And thanks for pointing me in the right Frisco

Last edited by johnnykool6; 11-08-2009 at 01:25 PM. Reason: adding on
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
350 wont idle with vacuum lines hooked up 91CamaroDude Engine 20 10-28-2011 10:43 AM
chevy turbo 350 detent is hooked up but.... 77punk Transmission - Rearend 3 09-01-2009 04:39 AM
79 Trans Am/w 350, need gauges hooked up Gladis Electrical 5 12-29-2006 09:40 AM
Blown 400 Thom Laybourne Transmission - Rearend 8 03-11-2004 04:13 PM
blown sb 400 ceevu Engine 3 10-05-2002 10:56 AM


All times are GMT -6. The time now is 02:43 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.