Results 1 to 14 of 14

5.3L Vortec

This is a discussion on 5.3L Vortec within the Internal Engine forums, part of the LSx Technical Help Section category; I often hear people say they are gettign 5.3 heads. Would these be the same heads on a 5.3L Vortec? ...

  1. #1
    Member R_Yates69@Hotmail.com's Avatar
    Join Date
    Aug 2005
    Location
    Nova Scotia, Canada
    Age
    33
    Posts
    239

    Red
    1999 Trans Am

    5.3L Vortec

    I often hear people say they are gettign 5.3 heads. Would these be the same heads on a 5.3L Vortec?

    Are they better than LS6 heads?

  2. #2
    Junior Member 99TransAmWS6's Avatar
    Join Date
    Mar 2009
    Location
    Birmingham, Alabama
    Age
    26
    Posts
    45

    Black
    1999 Trans Am WS6 Convert

    I wanna know this as well haha
    never heard of that?

  3. #3
    cutting and welding mark21742's Avatar
    Join Date
    Mar 2008
    Location
    mercersburg pa
    Posts
    6,443

    hugger orange
    2004

    yup thats them. here is some info for you guys
    http://en.wikipedia.org/wiki/GM_Vortec_engine

  4. #4
    Junior Member 99TransAmWS6's Avatar
    Join Date
    Mar 2009
    Location
    Birmingham, Alabama
    Age
    26
    Posts
    45

    Black
    1999 Trans Am WS6 Convert

    That is sick dude haha

  5. #5
    Member R_Yates69@Hotmail.com's Avatar
    Join Date
    Aug 2005
    Location
    Nova Scotia, Canada
    Age
    33
    Posts
    239

    Red
    1999 Trans Am

    Ok guys, I dont know if you didnt notice but i'm pretty stunned to this stuff. So are you saying that the Vortec heads are better?

    Could I swap the 5.3 Heads off my truck (2006 GMC Sierra) put them on my trans am, than put my LS1 Heads or LS6 Heads on my truck?

  6. #6
    Junior Member 99TransAmWS6's Avatar
    Join Date
    Mar 2009
    Location
    Birmingham, Alabama
    Age
    26
    Posts
    45

    Black
    1999 Trans Am WS6 Convert

    that shit would be crazy lol

  7. #7
    Member Goldcuffs's Avatar
    Join Date
    Aug 2008
    Location
    Florida
    Posts
    411

    Silver
    2000 Trans Am

    I think I remember reading an article in Pontiac High Performance and they used those heads on an LS1. You might try searching through there site.
    http://www.highperformancepontiac.co...les/index.html

  8. #8
    Member R_Yates69@Hotmail.com's Avatar
    Join Date
    Aug 2005
    Location
    Nova Scotia, Canada
    Age
    33
    Posts
    239

    Red
    1999 Trans Am

    haha guys I just wanna know opinions here, I mean it's a thought, Im not planning on doing anything anytime soon, just a future thought.
    5.3 Vortec heads on 1999 Trans Am WS6 compared to the LS6 Heads on it now?

    LS6 Heads(Or LS1 Heads) on my truck(since i would be taking the 5.3's from it) Would this hurt my truck's power? Improve? What?

  9. #9
    Junior Member 99TransAmWS6's Avatar
    Join Date
    Mar 2009
    Location
    Birmingham, Alabama
    Age
    26
    Posts
    45

    Black
    1999 Trans Am WS6 Convert

    Probably hurt it haha

  10. #10
    cutting and welding mark21742's Avatar
    Join Date
    Mar 2008
    Location
    mercersburg pa
    Posts
    6,443

    hugger orange
    2004

    Quote Originally Posted by R_Yates69@Hotmail.com View Post
    haha guys I just wanna know opinions here, I mean it's a thought, Im not planning on doing anything anytime soon, just a future thought.
    5.3 Vortec heads on 1999 Trans Am WS6 compared to the LS6 Heads on it now?

    LS6 Heads(Or LS1 Heads) on my truck(since i would be taking the 5.3's from it) Would this hurt my truck's power? Improve? What?
    the 5.3 heads have slightly smaller chambers to give you a bump up in compression, but at the same time they have smaller runners and valves. so to get the most out of them you need to port and polish them, and get the larger valves put in them.
    but to answer your question, yes if you wanted to you could swap your truck heads to your car, the valves might be a hair too big in the heads that are on your car t fit the smaller bore of the 5.3

  11. #11
    Sold: LS1 '85 El Camino ls1camino's Avatar
    Join Date
    Dec 2005
    Location
    Laurel, Maryland
    Posts
    4,977

    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    Get 5.3L Heads (increase in compression), have them CNC Ported (to increase flow), and have a valve job done to increase the valve size (to increase flow). I also had my 5.3L Heads milled to 60cc, wasn't a choice, more of a requirement (chip in the head surface)...I hope it will work with my cam choice.

    Ta-da

  12. #12
    Grand Imperial Wizard Sarge's Avatar
    Join Date
    Aug 2005
    Location
    Texas Department of Corrections
    Posts
    18,129
    Retired Outlaw Sum Bitch

    Quote Originally Posted by mark21742 View Post
    the 5.3 heads have slightly smaller chambers to give you a bump up in compression, but at the same time they have smaller runners and valves. so to get the most out of them you need to port and polish them, and get the larger valves put in them.
    but to answer your question, yes if you wanted to you could swap your truck heads to your car, the valves might be a hair too big in the heads that are on your car t fit the smaller bore of the 5.3
    Yeah and after all that you would basically have 243 heads

  13. #13
    Member R_Yates69@Hotmail.com's Avatar
    Join Date
    Aug 2005
    Location
    Nova Scotia, Canada
    Age
    33
    Posts
    239

    Red
    1999 Trans Am

    after all that i think im just going to leave it as is lol thanks for the insight guys!

  14. #14
    cutting and welding mark21742's Avatar
    Join Date
    Mar 2008
    Location
    mercersburg pa
    Posts
    6,443

    hugger orange
    2004

    Quote Originally Posted by Sarge View Post
    Yeah and after all that you would basically have 243 heads
    lol true

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. S10 4.8 Vortec 5.7 LS
    By stempy in forum LSx Retrofit and Swap
    Replies: 19
    Last Post: 07-14-2014, 10:59 PM
  2. Vortec heads on non Vortec block
    By bradyhill1 in forum Internal Engine
    Replies: 0
    Last Post: 03-23-2013, 02:49 PM
  3. Help: 5.3 Vortec to a 5.7 LS1?
    By philyfz450 in forum General Help
    Replies: 7
    Last Post: 02-21-2011, 08:09 PM
  4. 396 ci LS/Vortec?
    By Three46Ci in forum Internal Engine
    Replies: 3
    Last Post: 09-07-2009, 08:36 PM
  5. Vortec 350..
    By SeVeReDiStOrTiOn in forum Almost Anything Goes
    Replies: 19
    Last Post: 03-23-2009, 06:12 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •