4.3 liter questions - Off-Road Forums & Discussion Groups
GM Small Trucks & SUV's All discussion of S-Class Trucks and SUV's

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-04-2002, 07:13 PM
Posts: n/a
4.3 liter questions

I have a K1500 short bed with a 4.3 liter and it says Vortec V-6 on the valve covers but the intake is TBI. I have never heard of a 94 pickup with vortec heads and tbi but I do know that the s10 trucks and blazers had a cpi vortec. If anyone has some info on this engine please let me know. Oh, and I also was wanting a better exhaust sound so I put a gibson cat-back system on and it seems like a lost some power and the sound it only good to about 2000 rmps and only under load doesn it sound good. If I am cruising it is just a drone and above 2000 it sounds like a drone type of sound. If anyone knows if removing the cat and/or putting on headers would give a better sound please let me know.

Sponsored Links
post #2 of (permalink) Old 08-05-2002, 12:49 AM
Join Date: Apr 2002
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Re: 4.3 liter questions

It is a vortec engine, even though it has throttle body. As far as the exhaust, you robbed the engine of back-pressure. That's why you have a lack of power. Putting headers on and removing the cat, or installing a high-flow cat would lessen exhaust back-pressure even more, cutting down on torque. The engine was designed with a certain amount of back-pressure in mind, especially with a heavier truck. My advice is to put it back the way it was and drive it.
Hammerdown is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome