Performance Engine Tuning

1,385 topics in this forum

1. 400+ Hp 5.3 Natural Aspiration 1 2 3 4

   By clayt6499, March 23, 2010
   • 47 replies
   • 209.5k views
   • 
   • Low14
   • June 19, 2015

3. Best tuner to turn off AFM? 1 2

   By 508gm1, October 26, 2014
   • 27 replies
   • 182.9k views
   • 
   • Gmann
   • February 28, 2017

4. anyone get a tune on a 5.3? 1 2 3

   By quickvert1, January 19, 2014
   • 37 replies
   • 125.6k views
   • 
   • BANONE FSU
   • September 29, 2019

5. AFM Disable Damage 1 2

   By L83_Z71, July 3, 2018   

   • chevrolet
   • range
   • 22 replies
   • 101.2k views
   • 
   • 12dyllon
   • October 22, 2022

6. Programmer shopping for a 5.3L

   By 99gst_racer, April 9, 2012
   • 14 replies
   • 91.5k views
   • 
   • Carder09
   • April 28, 2012

7. Official Custom Tune Thread!

   By omegafiler, February 10, 2008
   • 0 replies
   • 75.9k views
   • 
   • omegafiler
   • October 6, 2009

8. Finally Took the BlackBear plunge 1 2 3 4

   By tazerbro, May 14, 2012
   • 54 replies
   • 74.7k views
   • 
   • SOL24/7
   • October 8, 2016

9. Whats The Best Power Programmer For My 07 Sierra 5.3 1 2

   By GMC_ON_20FORZ, October 13, 2008
   • 21 replies
   • 74.7k views
   • 
   • Sweathog62
   • April 9, 2012

10. Range AFM Disable - Anyone tried it? 1 2

    By Tony1959, November 23, 2014   

    • range afm
    • 23 replies
    • 68.5k views
    • 
    • RVRRNR
    • March 18, 2022

11. How do you turn off the AFM ? and what are the pros and cons

    By opus8844, June 4, 2012   

    • afm
    • 12 replies
    • 68k views
    • 
    • BlackZ71Silverado
    • July 31, 2012

12. Black Bear / 2011 Sierra 6.2 Dyno Results

    By xertechx, November 30, 2010
    • 0 replies
    • 64.7k views
    • 
    • xertechx
    • July 24, 2011

13. Whipple for the 8.1

    By tmf6902, August 21, 2003
    • 0 replies
    • 64.5k views
    • 
    • tmf6902
    • February 18, 2006

14. Stock air intake mods 1 2

    By rusty01, May 9, 2012   

    • mod
    • performance
    • (and 2 more)

      Tagged with:

      • mod
      • performance
      • air intake
      • ram air
    • 18 replies
    • 62.6k views
    • 
    • Dilatory
    • September 7, 2012

15. 4.8 to 5.3 engine swap

    By Tetens20, January 31, 2007
    • 0 replies
    • 59.5k views
    • 
    • Tetens20
    • December 26, 2010

16. Cam Ideas For My 4.8

    By chevyboss22, February 10, 2010
    • 0 replies
    • 57.5k views
    • 
    • chevyboss22
    • March 1, 2010

17. cold air intake is it worth the money? 1 2

    By rolling tall, February 19, 2012
    • 26 replies
    • 56.5k views
    • 
    • oldschool327
    • March 5, 2012

18. !!!5.7L compression test need advice!!!

    By tybic, February 7, 2015   

    • compression test
    • 5.7l
    • 5 replies
    • 56.2k views
    • 
    • 8.1HD/ALLISON
    • February 10, 2015

19. Where Is My Fuel Pressure Regulator?

    By 96chevy7.4L, May 27, 2008
    • 0 replies
    • 51.1k views
    • 
    • 96chevy7.4L
    • June 3, 2008

20. Top Speed Removal

    By neto1978, July 3, 2011
    • 0 replies
    • 49.7k views
    • 
    • neto1978
    • July 20, 2011

21. 5.3l Convert Ls1 Parts?

    By 99GMCSIERRA, October 28, 2008
    • 0 replies
    • 48.3k views
    • 
    • 99GMCSIERRA
    • February 23, 2009

22. best performance parts for 6.2L

    By rickybobby88, October 20, 2016
    • 9 replies
    • 46.9k views
    • 
    • Payton34
    • November 10, 2017

23. Best overall muffler for 5.3L

    By jackster06Z71, May 1, 2006
    • 0 replies
    • 44.9k views
    • 
    • jackster06Z71
    • June 19, 2006

24. Buy New Engine Or Rebuild Old Engine? 99 5.3l Z71

    By Badshot, March 21, 2010
    • 0 replies
    • 41.9k views
    • 
    • Badshot
    • March 22, 2010

25. 350 to 454 engine swap?

    By Mr Construction, November 5, 2006
    • 0 replies
    • 40.3k views
    • 
    • Mr Construction
    • November 6, 2006

26. BORLA FLOWMASTER GIBSON MAGNAFLOW

    By opsbear7, March 3, 2006
    • 0 replies
    • 38.3k views
    • 
    • opsbear7
    • May 7, 2011