350 Vortec to TBI conversion - 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> Modern Electronic Engines
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-03-2012, 04:06 PM
Edahall's Avatar
Registered User
 
Last photo:
Join Date: Feb 2004
Location: Ventura, California
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
350 Vortec to TBI conversion

I've got a 1999 Chevy Tahoe with a blown engine and worn out transmission. I also have a very low mileage Chevy 350 TBI and 4L60E transmission out of a 1994 Chevy van. I want to put this whole 350 TBI and transmission setup into the Tahoe. I would like to keep it TBI if possible for its simplicity. How hard is this to do? I've got the complete wiring harness and computer for the 350 tbi.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-03-2012, 04:33 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,044
Wiki Edits: 0

Thanks: 190
Thanked 237 Times in 220 Posts
Neither. Dont even bother. you are going backwards as far as emission devices go, it will never make it past a smog station.
Besides, you are talking a pretty major rewire on the Tahoe, then you will need to change the fuel lines as they wont fit, then the tranny wont work as it is probably a 4L60E, so it needs the PCM in the truck now , which wont run the TBI setup.
No sir, wont happen.
BUT, you have a perfect engine and trans and computer, man o man, get your self an Old chevy of somekind and build something really cool.
Trade the Tahoe in.You wont be sorry.
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-03-2012, 05:16 PM
Edahall's Avatar
Registered User
 
Last photo:
Join Date: Feb 2004
Location: Ventura, California
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LATECH View Post
Neither. Dont even bother. you are going backwards as far as emission devices go, it will never make it past a smog station.
Besides, you are talking a pretty major rewire on the Tahoe, then you will need to change the fuel lines as they wont fit, then the tranny wont work as it is probably a 4L60E, so it needs the PCM in the truck now , which wont run the TBI setup.
No sir, wont happen.
BUT, you have a perfect engine and trans and computer, man o man, get your self an Old chevy of somekind and build something really cool.
Trade the Tahoe in.You wont be sorry.
Drats!! I was hoping not to hear this. I prefer the TBI over the problematic Vortec fuel injection setup. Smog is not an issue where I live. The engine and transmission only has 20k original miles on it. I pulled it out of the van back in 1996.

I already have an old Chevy. It's a 1972 Chevy truck but I'd rather put a Cummins in it. Yes, the Tahoe is hardly worth more than scrap metal but at least, it's 2 wheel drive so I can lower it and make it a sleeper.

Anyways, back to the 350. Can I put the Vortec intake manifold setup on the 1994 engine so it can work in the Tahoe? I would rather keep the TBI heads because they are virtually new.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-04-2012, 04:21 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 50
Posts: 1,303
Wiki Edits: 0

Thanks: 2
Thanked 25 Times in 25 Posts
You can use the old engine/trans with the corresponding ECM. You will have some difficulties with keeping the ABS and maybe the instruments working. ANd it will not pass even a visual emissions check.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-04-2012, 05:55 PM
Registered User
 
Join Date: Jan 2012
Location: edmonton
Age: 28
Posts: 41
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
The vortec manifold wont bolt up to your tbi heads if i remember correctly its wider, tbi manifold uses 12 bolts vortec uses 8 bolts.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-04-2012, 05:58 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,044
Wiki Edits: 0

Thanks: 190
Thanked 237 Times in 220 Posts
Trade the Tahoe for a cummins, and get an old impala to put the TBI setup in.
You got stuff to trade with there, pony up on horsetrading a little
No pun intended.
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-04-2012, 06:00 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,044
Wiki Edits: 0

Thanks: 190
Thanked 237 Times in 220 Posts
That ol TBI setup would be super sweet in that 72 .
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-04-2012, 06:12 PM
Edahall's Avatar
Registered User
 
Last photo:
Join Date: Feb 2004
Location: Ventura, California
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LATECH View Post
That ol TBI setup would be super sweet in that 72 .
Yeah, that's maybe what I should do. The TBI engine should bolt up fine to the 4 speed manual that's in the truck. It's got an SM465 4 speed manual and 3.08 gears so overdrive is not really needed.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-04-2012, 06:34 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,044
Wiki Edits: 0

Thanks: 190
Thanked 237 Times in 220 Posts
If the ECM you will use was for a standard shift you will be fine. If from an automatic you will need to change the prom or possibly the ECM to run a standard shift. I would bet just a prom would do it. That can be sourced from a salvage yard,or even the dealer may still be able to get it. Used to be like 45 bucks.

Also you may or may not need to run a VSS.
(vehicle Speed Sensor) some late 70 and early 80 models used one that went in the speedo cable to make it easy.
What ECM n umber do you have?
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-04-2012, 06:58 PM
Edahall's Avatar
Registered User
 
Last photo:
Join Date: Feb 2004
Location: Ventura, California
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ECM is for an automatic. I have yet to pick up the engine & transmission so I don't know what number is on the ECM. However, I do know that it is from a 1993 Chevy van.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-04-2012, 09:21 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,268
Wiki Edits: 31

Thanks: 2
Thanked 41 Times in 40 Posts
Just get the TBI wiring harness for a 1987-1993? Chevy truck. easy to find, few $ at the junkyard. The transmissions were not electronically controlled except lockup, so it will work fine with the M/T..

SM465 was used thru the 80's and into the TBI years, there is a VSS out there to make what you have work..
Reply With Quote Quick reply to this message

Recent Modern Electronic Engines 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 vortec to tbi conversion thekcbeast Modern Electronic Engines 26 05-07-2013 09:55 AM
350 vortec tbi conversion help Catatonic21 Modern Electronic Engines 0 06-07-2012 05:06 PM
350 TBI to 350 TBI VORTEC SWAP IWANTMOREHP Engine 7 05-02-2012 06:40 AM
305 vortec to 350 tbi 98chevystepside Modern Electronic Engines 3 01-16-2012 02:08 PM
350 vortec with TBI oldgolpher Hotrodding Basics 5 03-24-2010 11:42 AM


All times are GMT -6. The time now is 05:43 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.