600hp turbo silverado build suggestions

Discussion in 'Performance & Fuel' started by Shakeablegoose, Dec 3, 2012.

  1. Shakeablegoose

    Shakeablegoose New Member

    I am planning on turning my 2004 chevy silverado 1500 ls 4.8l extended cab long bed into a 500-600hp beast. I was thinking of running a Precision PT6266 turbo or a PT6766 turbo with the 750hp universal intercooler, pw46 external wastegate, TiAl 50mm BOV, NLR AMS-500 boost controller, and possibly the Wilson 90mm throttle body. I would have custom piping bent and it would be a front mount turbo and i would change up the camshaft, injectors, etc. too. Of course i would upgrade my transmission with the monster 650hp rated upgrade kit for my 4l60e and would probably get a driveshaft out of a 2500 or somthing and mod it to fit. What do you guys think i should do differently?
  2. Enkeiavalanche

    Enkeiavalanche Moderator

    Start with a 6.0....
  3. Shakeablegoose

    Shakeablegoose New Member

    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.
  4. Boonduff

    Boonduff New Member

    You will want to upgrade your rearend, at those power levels the 10 Bolt won't last very long. The Vortec Max equiped trucks used the 9.5 in. semi-floating 14 Bolt, which will bolt right in.
  5. ahmitchell1

    ahmitchell1 New Member

    Is it a 4 bolt main? I wouldn't run a lot of boost if it isn't. Not being a big fan of turbos and turbo lag have you looked into a compound set up. It's can give you a lot better torque curve. Make sure you take that driveshaft to get balanced if you have to cut it otherwise you drop that thing on the road. I'd beef up everything from the flywheel back
  6. dobey

    dobey Member

    All Gen III/IV LSx series V8s are 6-bolt mains, and Y-blocks, which are significantly stronger than older SBC/Vortec engines.

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    It was Hot Rod magazine. Here's the article:
    http://www.hotrod.com/techarticles/hrdp_1109_stock_gm_ls_engine_big_bang_theory/
    Last edited: Dec 5, 2012
  7. Shakeablegoose

    Shakeablegoose New Member

    I am also looking at replicating hot rod magazines twin turbo build in the link, just to see what it does. I'm sure i would have fun with it!!! I wish i knew what exact turbo and fuel injectors they used i am interested in that, i might have to ask them.
  8. dobey

    dobey Member

  9. ahmitchell1

    ahmitchell1 New Member

    That makes me almost rethinking a supercharger for my truck. I've always been against turbos and all roots style.
  10. Shakeablegoose

    Shakeablegoose New Member

    Should i do a twin turbo setup with those two 76mm turbo's from cxracing or a single bigger turbo such as the precision PT6766 or PT6266 thats rated to higher hp? The twin turbo will be harder to design and much more work but i think it would be worth it. The single turbo would probably have more lag but would only be running probably at about 8-10psi but would be alot simpiler and easier to maintain. What do you guys think and this build wont be taking place till probably summer 2013 so i have awhile to get the money to do it.

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    what years vortec max rear end will bolt right in? I'm sure i could find one in a junkyard with a nice rear end in it.
  11. dobey

    dobey Member

    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.
  12. Dontlookforme

    Dontlookforme New Member

    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
  13. darnie1987

    darnie1987 New Member

    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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    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
  14. dobey

    dobey Member


    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: Dec 30, 2012
  15. darnie1987

    darnie1987 New Member

    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...
  16. ahmitchell1

    ahmitchell1 New Member

    other than tranny what are you doing to the drivetrain
  17. dobey

    dobey Member

    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?
  18. nikkeshelton

    nikkeshelton New Member

    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!
  19. darnie1987

    darnie1987 New Member

    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.


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    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
  20. dobey

    dobey Member



    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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