06-07-2004, 09:27 PM
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#21
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Shrt Rnd Lw 2 D Ground
Join Date: Nov 2002
Location: ontario, canada
Age: 32
Posts: 562
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You need to get either a Wester's or Nelson's tuned PCM.
http://www.ecmprogrammer.com/
www.nelsonperformance.com
__________________
00 Silverado Z71 LT EXT Wester's 93, Dynomax, Poweraid, K&N, LS1 fans, Corvette Servo, Trans-go
96 Yukon 4 x 4, 4dr, SLT Wester's 93, UPD, MSD, Magnaflow, Casper's, LT1 fans, Corvette Servo, Trans-go **S O L D**
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07-09-2004, 04:50 PM
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#22
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Let's Roll
Join Date: Aug 2002
Location: Oxnard So. Cal
Posts: 23
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Here's a link to a bunch of free mod's you can use. I don't think they have the hot water bypass mod thought. http://www.sshotrods.com/performance/gmtruck/
__________________
2001 GMC Sierra 4.8L, Cold Air Intake, Descreened MAF , Hot Water Bypass, Flowmaster 50 S, Superchips Miromax tunner, Vette Servo, .490 Boost valve, Denso Irridium plugs, Taylor 8mm Spiro Pro Wires,
3.73 open ,SS chrome Grille, Door Handles, SS Sport Mirrors, Belltech shackles,
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08-04-2004, 02:52 PM
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#23
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Registered User
Join Date: Jul 2004
Location: Yukon, Ok
Age: 28
Posts: 57
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nice collection here, this site rocks.
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08-16-2004, 04:40 PM
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#24
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Registered User
Join Date: Aug 2004
Location: Georgia
Age: 22
Posts: 25
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damn thats a lotta stuff! i've been wondering some easy stuff to do to get a little bit more power out of my 5.3 in my tahoe, mostly just a shade more low end torque. Sounds like headers is the most reasonable option... yes?
also this list only goes up to 2002.. 2003 should be the same right?
do y'all recommend anything else sub $700 for low end torque for my 5.3? Thanks fellas! 
__________________
2003 z71 tahoe
Magnaflow dual exhaust
Tinted windows
2 Audiobahn Flame Q's subs.. 2,200 watts, Direct Amp
1978 chevy blazer
4" suspension lift
3" body lift
38.5" TSLS
400 small block
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09-22-2004, 01:30 PM
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#25
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Cone Killer
Join Date: Sep 2004
Location: North Hollywood, Ca
Age: 36
Posts: 26
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Can I recommend something for tuning your PCM? Do a search for HPTuners, it allows you to modify all of your pcm values to how ever you choose. Plus it has a scanner that logs all of your pcm values and it can even deleted trouble codes. Very worthwhile program if you want to tune your 99+ V8 truck for more power. 
__________________
George P. Lara: 2001 Camaro SS #0391
HPTuners Support for all LSx Platforms
Jenibella Racing Crew Chief
1998 Camaro Z28: 9.94 @ 137, 1.45
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09-23-2004, 09:41 AM
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#26
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20 Inches Strong
Join Date: Sep 2004
Location: Austin, Texas
Age: 23
Posts: 507
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What about some headers? There's so many, what would fit a 00' 4.8? And still be legal.
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10-02-2004, 12:14 PM
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#27
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Registered User
Join Date: Sep 2004
Location: Washington
Age: 31
Posts: 12
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Re: Power mods of 99-02 5.3 V8
What is the best way to spend $1500 on a 5.3L? I'm interested in exhaust, Air-Flo, and some sort of computer programmer, and any thing else I can get my hands on within my budget. Any suggestions would be greatly appreciated.
1LT serving in OIF2, cant wait to get back to my Z-71.
Thanks!
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10-02-2004, 12:16 PM
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#28
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Registered User
Join Date: Sep 2004
Location: Washington
Age: 31
Posts: 12
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Re: Power mods of 99-02 5.3 V8
[QUOTE=lumberjack78]What is the best way to spend $1500 on a 5.3L? I'm interested in exhaust, Air-Flo, and some sort of computer programmer, and any thing else I can get my hands on within my budget. Any suggestions would be greatly appreciated.
1LT serving in OIF2, cant wait to get back to my Z-71.
Thanks!
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11-28-2004, 07:11 PM
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#29
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I NEED MORE CASH
Join Date: Nov 2002
Location: So. ILL
Age: 32
Posts: 183
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Re: Power mods of 99-02 5.3 V8
your neighbors credit card
__________________
1978 GMC K1500
6"lift 33"bfg mt
work in progress 
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12-02-2004, 02:34 PM
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#30
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HI
Join Date: Mar 2003
Location: East Yay area
Age: 29
Posts: 53
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Re: Power mods of 99-02 5.3 V8
looks like that engine would scream
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12-06-2004, 01:54 PM
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#31
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I NEED MORE CASH
Join Date: Nov 2002
Location: So. ILL
Age: 32
Posts: 183
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Re: Power mods of 99-02 5.3 V8
descreen the MAF
__________________
1978 GMC K1500
6"lift 33"bfg mt
work in progress
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12-24-2004, 09:46 PM
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#32
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Fun with 4800
Join Date: Jul 2003
Location: Arlington
Posts: 51
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Re: Power mods of 99-02 5.3 V8
Well I've done most of this stuff. The thing that made the biggest difference was the cam. I'm running a Lunati 55002. Most of you have automatics so you will need to use a higher stall torque converter to compensate for the slight loss of low end power. Also raising the rev limiter will probably be required to get the most out the extended power band. You can use the stock valvesprings with this model so the cam and supplies will run you around $400. If you tow or do not wish to change the converter I would look for a different cam. There are plenty available from Competition, Crane, Crower and some more I can't think of right now. Anyway a lot of bang for the buck but a lot more work.
__________________
2001 Silverado
RCSS 4.8L-5speed: Lunati cam, Superchips prg., K&N, Dynomax 2.5 duals, 180 thermo & efans, Free mods, 4.10 w/Eaton posi & last but not least the TORNADO!
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02-05-2005, 12:25 AM
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#33
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Registered User
Join Date: Feb 2005
Location: Oklahoma
Posts: 1
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Re: Power mods of 99-02 5.3 V8
Hey all, new here....was wondering if anyone has a Airaid intake on there truck...I have a 02 Silverado Extened cab...5.3L...Was looking into a airraid system or maybe another one....been looking at a ram air system too from this place. http://www.vararam.com/kingcobra.html anyway, any help will be appreciated....See ya 
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02-12-2005, 05:09 AM
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#34
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Registered User
Join Date: Feb 2005
Location: San Diego
Posts: 2
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Re: Power mods of 99-02 5.3 V8
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02-26-2005, 01:45 AM
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#35
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Registered User
Join Date: Feb 2005
Location: cali
Posts: 32
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Re: Power mods of 99-02 5.3 V8
magna charger radix supercharger /magnaflow muffler/z-industries program/gibson (soon to be gone )header.water by pass own built air box with cone k&n /no speed limiter on mine stock gears for now ...
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02-27-2005, 12:37 PM
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#36
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Registered User
Join Date: Feb 2005
Location: canada
Posts: 1
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Re: Power mods of 99-02 5.3 V8
I've installed a hypertech power programmer III, flowmaster 30 series cat-back duals and a K&N fipk, on my 03 sierra, total cost was about $1600 cdn. (1200-1300 u.s.).The results were pretty impressive although I doubt the performance gain claimed by the manufacturers is that high. The stock h.p. was 295 after the mods the claimed h.p. gains should have bumped me up to 350-360 ponies. The exhaust sounds awesome and the programmer, air-box mods improved responsiveness, especially at mid rpms. Not bad gains for the money. Smoked two hemis, bring on the fords!!
Last edited by gizmosgmc; 02-27-2005 at 12:38 PM.
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02-28-2005, 08:06 PM
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#37
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Registered User
Join Date: May 2004
Location: Huntington Beach, Ca
Posts: 1
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Re: Power mods of 99-02 5.3 V8
I had a Jet chip on my 5.3. Had many problems...truck would not shift and also had problems with the gauges not reading correctly after installation of the chip. I know it was not a problem with the installation beacuse my buddy had one of the guys from jet install it for me....I would stay away from jet.
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03-19-2005, 06:55 PM
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#38
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Registered User
Join Date: Sep 2004
Location: alabama
Posts: 94
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Re: Power mods of 99-02 5.3 V8
what is this a stall? (YANK Truck Thruster 3000 $739)
thanks
__________________
GO DALE JR #8!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
"Turn on...I see red
Adrenaline crash & crash my head
Nitro Junkie, Paint me dead
And I see red
One hundred plus through Black and White
War Horse, Warhead
F@#k 'Em Man, white knuckles tight
Through Black & White "
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03-23-2005, 08:18 PM
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#39
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ocean minded
Join Date: Feb 2003
Location: newport beach, ca
Posts: 936
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Re: Power mods of 99-02 5.3 V8
Quote:
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Originally Posted by dalejr#8
what is this a stall? (YANK Truck Thruster 3000 $739)
thanks
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yes, a 3000 rpm stall
__________________
03 5.3 excab 2wd
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05-12-2005, 08:34 PM
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#40
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Registered User
Join Date: May 2005
Location: Bakersfield California
Age: 41
Posts: 27
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Re: Power mods of 99-02 5.3 V8
The best power investment I made so far was a....
Whipple Supercharger $3950 to $4550
Available for 4.8, 5.3 6.0 & 6.0 OHO
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