4.3 1989 motor and the 1994 vortec 6 cyl which is better - S-10 Forum
S-10 Forum is the resource on GM S-series trucks, Suspension, engine information, Body Modifications, painting tutorials.  Modifications to suit every need, budget and whim

4.3 1989 motor and the 1994 vortec 6 cyl which is better

Go Back   S-10 Forum > Specific Model Forums > 1st Gen Forums > S10 / S15
New User? Register Forgot Password


 
LinkBack Thread Tools
Old 12-23-2013, 10:44 PM   #1
Registered User
 
Age: 45
Join Date: Oct 2013
Posts: 12
Location:
User is: OffLine
4.3 1989 motor and the 1994 vortec 6 cyl which is better

Guys
My baja has the 4.3 but have a chance to get a complete vortec motor out of a 1994 blazer what is the difference ie which is better? And would it bolt right in?
Old 12-24-2013, 08:52 AM   #2
Boozebag
 
Mad Max's Avatar
 
Join Date: Jun 2009
Posts: 4,137
Location: Baton Rouge, LA
User is: OffLine
Re: 4.3 1989 motor and the 1994 vortec 6 cyl which is better

The Vortec is more powerful, but the engine management system is totally different. You would need the entire wiring harness for the engine and the ECU.
It will bolt in, but the electronics will kill you.
Oh, and the tranny in the newer rig is electronically controlled. You would need that also since it provides input to the ECU....
Old 01-11-2014, 08:36 PM   #3
Registered User
 
Age: 33
Join Date: Jul 2013
Posts: 8
Location: Lakeside
User is: OffLine
Re: 4.3 1989 motor and the 1994 vortec 6 cyl which is better

or you could just use the heads from the 94 but I would look more towrds 96 or newer, and get you the edlebrock intake manifold and you can use everything else and be good to go. The heads alone are well worth the swap.
Old 01-18-2014, 02:12 PM   #4
Registered User
 
Blazn's Avatar
 
Join Date: Jan 2014
Posts: 3
Location: Upstate, NY
User is: OffLine
Re: 4.3 1989 motor and the 1994 vortec 6 cyl which is better

The '94 Vortec heads have the same bolt pattern for the intake as the '89, so yes it is a bolt in if you reuse the intake from the '89. This will allow you to retain the stock '89 electronics. You may want to experiment with spark plug heat range but as the improvement with a vortec head is in the way the air/fuel mixing is enhanced the stock ECM should be able to handle it. I have an '89 S10 2wd Blazer, 5 spd, 4.3 vortec from a '94 with a marine carburated intake, billit 60k volt distributor and stock exhaust. Unbelieveable difference in low end torque and I have surprised many mustang and eclipse owners.

Last edited by Blazn; 01-18-2014 at 02:18 PM. Reason: Left out information
Old 01-18-2014, 08:01 PM   #5
peace and big boobs to u
 
phantom_mia's Avatar
 
Join Date: Nov 2007
Posts: 5,726
Location: soflo
User is: OffLine
Re: 4.3 1989 motor and the 1994 vortec 6 cyl which is better

or you could have your heads ported and get a bigger bump stick with edelbrock manifold. i have heard about the "vortec" heads for several years now but what i've never heard is what they flow in cfm's.
Sponsored Links
Advertisement
 

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the S-10 Forum forums, you must first register.
Please enter your desired user 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.
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.



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



All times are GMT -4. The time now is 05:23 AM.

Powered by vBulletin® Copyright ©2000 - 2011, Jelsoft Enterprises Ltd. SEO by vBSEO 3.2.0
SEO by vBSEO
vBulletin Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.