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  1. #11

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    You could use a single one of those turbos (or a larger one if you really wanted to). One of the ones I linked to will support ~600 HP easily, and it should be easy to get to 600 HP with one of them, ported/polished heads, intake, and cam. Maybe even with the stock Vortec intake manifold.

  2. #12
    Sr. Apprentice Dontlookforme's Avatar
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    Sep 2010
    Location
    Metairie, Louisiana
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    55

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    Keep the stock cam or upgrade to the LS6 cam. Either way, install the LS6 springs! NGK TR6 spark plugs. I've already done what your talking about, if you have any questions feel free to ask bud..... I have a trick performance T76 stage 4 kit on a 2004 LQ4 with 40k mile motor I bought from an auto recycler with all acc and wire harness. I also have a 4L60e built to Handel 700rwhp with a 1600 stall. My "biggest" problem with the truck is traction!!! I have 3.23 gears but with my aftermarket tire size 275/55/20, it brings my rear axle ratio up to a 3.02 or something close to that. At 100mph I still spin both rear tires. Lol it gets a little shady at times but I'm trying to figure out. Sound like your on the right track! Keep us posted.

    Jason
    2006 silverado 1500 LT1 4X2 ecsb 6.0L, front mount T76 turbo intercooled, Detroit true trac, 3.23, Chevrolet black chrome 20"s, Nelson performance tune! magna flow muffler with dual exhaust with QTP cut out. ET-14.001 @100mph spinning.....

  3. #13

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    If it was me i would get a 6.0, trick stage 3 turbo, Isky cam. Prc heads, upgraded fuel system, cir'd triple disk stall, i wouldnt go with the monster transmission if it were me tho. i would do a 4l80e of a Built tranny from FLT or Performance built. if you have any questions let me know i got a buddie that was pushing 638 rwhp with a 6.0 at 10psi with that set up

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    Quote Originally Posted by Shakeablegoose View Post
    the 4.8l will easily make that much power with no problem, i forgot who did it but some company rebuilt a junkyard 4.8l with only replacing the camshaft and some other minor things and they made 40 1/4 mile passes with that engine making 1236hp on a engine stand dyno i believe and on the 40th pass something electronical messed up. I can't remember what it was but it was not because of the excess power. So the 4.8l should do just fine and i do not want to do a 6.0 swap if i dont have to.
    Only issue with it is that it blew up.... one good thing is you can get a new junker 4.8 for 5-600 but why not do it right and leave it
    2004 gmc sierra ext z71 5.3
    PERFORMANCE...
    KB racing hot pipes 3.5" : 76mm turbo: 4l80e : Circle-d 2b multi disk :Walbro 400 : Racetronix Hotwire kit : TB coolant bypass : Nelson 91 Pcm : Tr 220 Cam : Brian Tooley double springs kit : Ls7 Lifters : Stage 3 heads : Custom Intake Manifold :80lb Injectors : Ported TB : 40k tranny cooler: Plx dm-100 gauge: Auto meter fuel and boost gauge:
    APPEARANCE...
    Custom Speedo : Leveling kit :Smoked led taillights and 3rd break light : Black projectors and fogs with hids : Blacked out grille : 33's on 16's : Clarion flip screen: sound que 12" subs: clerion 6x9's : Memhpis amps: Alpine componet set.
    Future mods... Detriot tru-trac, deviels own stage 2 meth kit, MORE BOOST!!!!!!!!!!!!!!

  4. #14

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    Quote Originally Posted by darnie1987
    Only issue with it is that it blew up.... one good thing is you can get a new junker 4.8 for 5-600 but why not do it right and leave it

    You're buddy's 6.0 blew up? Or the Hot Rod 4.8 blew up? Only issues Hot Rod had, is that they originally thought it was a 5.3, started having possible ignition issues at 27psi, and they ran out of time on the dyno. Other than that it was fine, and it would probably be fairly reliable if left under 14 psi for the street.
    Last edited by dobey; 12-30-2012 at 08:05 AM.

  5. #15

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    the 4.8 and anything over about 11-12 psi u need race fuel is kinda a general rule around here. a 6.0 on 10 psi 438 rwhp and was running mid 11's all day. and reliably. honestly im in the process in doing the same thing but with a 5.3 should still hit 11's in a 4x4 ext cab truck. thats ntb...
    2004 gmc sierra ext z71 5.3
    PERFORMANCE...
    KB racing hot pipes 3.5" : 76mm turbo: 4l80e : Circle-d 2b multi disk :Walbro 400 : Racetronix Hotwire kit : TB coolant bypass : Nelson 91 Pcm : Tr 220 Cam : Brian Tooley double springs kit : Ls7 Lifters : Stage 3 heads : Custom Intake Manifold :80lb Injectors : Ported TB : 40k tranny cooler: Plx dm-100 gauge: Auto meter fuel and boost gauge:
    APPEARANCE...
    Custom Speedo : Leveling kit :Smoked led taillights and 3rd break light : Black projectors and fogs with hids : Blacked out grille : 33's on 16's : Clarion flip screen: sound que 12" subs: clerion 6x9's : Memhpis amps: Alpine componet set.
    Future mods... Detriot tru-trac, deviels own stage 2 meth kit, MORE BOOST!!!!!!!!!!!!!!

  6. #16

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    Quote Originally Posted by darnie1987 View Post
    the 4.8 and anything over about 11-12 psi u need race fuel is kinda a general rule around here. a 6.0 on 10 psi 438 rwhp and was running mid 11's all day. and reliably. honestly im in the process in doing the same thing but with a 5.3 should still hit 11's in a 4x4 ext cab truck. thats ntb...
    other than tranny what are you doing to the drivetrain
    2009 chevy 1500 z71 4x4
    2.5 ccm level,2.5 inch rear blocks 305/60/18 coopers stt,Debadged,10 series flow w/dual exit in front or right rear tire, KN CAI, diablo InTune, 18% tint all the way around ,spec-d euro headlights with black housings,winjet smoke LED tail lights,putco LED third brake light smoked, fab fours front bumper with 10k warn winch, RK sports ram air hood
    1965 c10 swb, zz4 350 with the hot cam and fast burn heads and a 780 Holley on top, richmond super street 5 speed,restorod

  7. #17

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    Quote Originally Posted by darnie1987
    the 4.8 and anything over about 11-12 psi u need race fuel is kinda a general rule around here. a 6.0 on 10 psi 438 rwhp and was running mid 11's all day. and reliably. honestly im in the process in doing the same thing but with a 5.3 should still hit 11's in a 4x4 ext cab truck. thats ntb...
    That didn't really answer my question. Or maybe you did, but I can't tell from the lack of grammar/punctuation. What are you saying blew up exactly?

  8. #18

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    You must have deep pockets! I want a supercharger but it will cost me $6,000. Plus all the upgrades down the drive line I installed a 2spd gear vendor box which really gave me a hp. boost through gearing, that was $4,000. Headers & K&N intake and headers with an Edge programmer are all I've got! Keep us informed!

  9. #19

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    Quote Originally Posted by dobey View Post
    That didn't really answer my question. Or maybe you did, but I can't tell from the lack of grammar/punctuation. What are you saying blew up exactly?
    I said and i quote: " The "4.8" blew up" due to the amount of boost on a stock motor...

    as far as the drive terrain id get a new rear end the g80 sucks and also a upgraded drive line and ujoints. ours arnt built to handle those speeds and HP ratings.


    - - - Updated - - -

    Quote Originally Posted by nikkeshelton View Post
    You must have deep pockets! I want a supercharger but it will cost me $6,000. Plus all the upgrades down the drive line I installed a 2spd gear vendor box which really gave me a hp. boost through gearing, that was $4,000. Headers & K&N intake and headers with an Edge programmer are all I've got! Keep us informed!
    alot depends on ur wants/needs/ and mula. i have a fully built 5.3 and i can run low low 13's all day long. and i still get around 22 mpg on the highway. there are a 1,000 ways to do things just gotta see what pest fits what you want sounds like your off to a great start tho. if u go any further tho you'll need custom tuning. gearings great if you plan on staying NA but if you go boost thats a different story
    2004 gmc sierra ext z71 5.3
    PERFORMANCE...
    KB racing hot pipes 3.5" : 76mm turbo: 4l80e : Circle-d 2b multi disk :Walbro 400 : Racetronix Hotwire kit : TB coolant bypass : Nelson 91 Pcm : Tr 220 Cam : Brian Tooley double springs kit : Ls7 Lifters : Stage 3 heads : Custom Intake Manifold :80lb Injectors : Ported TB : 40k tranny cooler: Plx dm-100 gauge: Auto meter fuel and boost gauge:
    APPEARANCE...
    Custom Speedo : Leveling kit :Smoked led taillights and 3rd break light : Black projectors and fogs with hids : Blacked out grille : 33's on 16's : Clarion flip screen: sound que 12" subs: clerion 6x9's : Memhpis amps: Alpine componet set.
    Future mods... Detriot tru-trac, deviels own stage 2 meth kit, MORE BOOST!!!!!!!!!!!!!!

  10. #20

    Default

    Quote Originally Posted by darnie1987 View Post
    I said and i quote: " The "[SIZE=4]4.8" blew up" [SIZE=2]due to the amount of boost on a stock motor...
    That isn't exactly what you said. But ok. However, the Hot Rod 4.8 1200 bhp build didn't blow up. Did you even read the article? Nowhere in the article does it say that it had any such failure. What it said is that they ran out of dyno time, and started hitting ignition issues, at 27psi. To go past that, they would have needed more time, and would need to start piling on more upgrades, starting with coils, plugs, and plug wires.

    Trust me, that 4.8 will last much longer than the 6.0 will, with the same amount of boost, and it'll be able to turn out power at higher RPMs than the 6.0.

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