Creation of a 2003 ZR2 V8. Hopefully we can make this a good teaching thread. - Blazer Forum - Chevy Blazer Forums


Engine & Internal Chat about beefing up your Blazer's engine insides here.

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 04-09-2017, 03:27 PM
Beginning Member
Thread Starter
 
Join Date: Jan 2015
Location: Poughkeepsie NY
Posts: 10
merlindan is on a distinguished road
Default Creation of a 2003 ZR2 V8. Hopefully we can make this a good teaching thread.

Hello everyone, like many of you, I've caught the mod bug and have decided to swap out my 4.3 for a Vortec 5.7. I got the engine from a junkyard with 102,000 miles on it for about 600 bucks. It came with all the accessories on it and whatnot. The motor is sitting here waiting to be put in, and i hope to make this a thread to help others who might be interested in the swap. So here is what I have so far in order to do the swap:

-JEGS swap in a box kit with motor mounts, headers, and oil pan.
-45* npt fitting for knock sensor
-MPFI upgrade for v8 already installed.

Im fairly sure that the first two are the only two things I need to get the engine to physically sit in the vehicle, as for making it run, theres my questions. I know I need to do the fuel injector wiring for two extra cylinders as well as repinning my ECU for several things. My question is: why cant I just use the harness/computer off of the van?
Reply With Quote
  #2  
Old 04-13-2017, 09:52 AM
Beginning Member
 
Join Date: Sep 2015
Posts: 12
asteele.19 is on a distinguished road
Default

Quote:
Originally Posted by merlindan View Post
Hello everyone, like many of you, I've caught the mod bug and have decided to swap out my 4.3 for a Vortec 5.7. I got the engine from a junkyard with 102,000 miles on it for about 600 bucks. It came with all the accessories on it and whatnot. The motor is sitting here waiting to be put in, and i hope to make this a thread to help others who might be interested in the swap. So here is what I have so far in order to do the swap:

-JEGS swap in a box kit with motor mounts, headers, and oil pan.
-45* npt fitting for knock sensor
-MPFI upgrade for v8 already installed.

Im fairly sure that the first two are the only two things I need to get the engine to physically sit in the vehicle, as for making it run, theres my questions. I know I need to do the fuel injector wiring for two extra cylinders as well as repinning my ECU for several things. My question is: why cant I just use the harness/computer off of the van?
if I am remembering correctly, I believe the blazer ecu is on the opposite side of the truck compared to vans and trucks.
Reply With Quote
  #3  
Old 04-14-2017, 08:48 PM
2004 Blazer's Avatar
Starting Member

 
Join Date: Aug 2015
Location: Mt Vernon/Fort Hunt, Virginia
Posts: 112
2004 Blazer is on a distinguished road
Default

I think you want to retain the original ECU for gauges, and other "Blazer" functions. Running both may be an option Van ECU for engine Blazer ECU for vehicle.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
HVAC issues, can't find a good thread answer mjr45 General Chat 2 11-13-2014 07:53 AM
Ok well i'll make another tire thread Mike98Blazer Tires and Wheels 4 10-18-2011 10:42 AM
pond rink creation DaveC Sights N Sounds 0 02-17-2010 12:09 PM
questions hopefully someone can help me with igot10pinitis 2nd Gen S-series (1995-2005) Tech 4 04-07-2009 03:27 PM
BEFORE YOU MAKE ANOTHER TURBO THREAD READ THIS! 02 Vortech Nitrous, Super Chargers, & Turbos 7 10-13-2008 07:38 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 01:46 AM.