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  1. #1

    Default whats the best way to gain HP?

    ive read alot of forums about the best to gain horsepower on a 4.8L silverado and everyone says somethin different. so whats honestly the best way to gain power with out forced induction?

  2. #2


    Are you looking for one single item or a series of items?

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  3. #3
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    Hi Chevy22, welcome to the GM truck club.
    The best way to get more HP? Simple, get more fuel and air into it, that's all.
    How to do it is where all the argueing starts. A lot of it depends on how thick your wallet is, & what you want to end up with, but a good start is a set of equal length, long tube headers.
    Last edited by stephan; 10-22-2010 at 12:14 AM. Reason: bad spelling lol
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  4. #4


    Swap out the 4.8L for a 7.0L, you should have plenty of HP then.
    Pavement sucks... :grrrrrr:

    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs bored over .050"
    balanced Crank, 10:1 compression
    Flat top pistons,cam,ported heads
    Option Racing Cold Air Intake
    Holley Throttle Body Spacer
    Accell Igition, 45kv coil
    FloTech Headers, no CATs, dual exhuast
    Goodyear Silent Armor A/T 305/70-16
    Pioneer SupertunerIII CD USB Bluetooth
    Kicker ZX200.2 ZX Amp
    Kicker Audio COMP 10" Subwoofer

  5. #5
    Legend Bigbomber's Avatar
    Join Date
    Feb 2010


    What stephan said.Welcome to the club!
    [/SIGPIC]2009 Chevy Silverado LT 1500 EXT CAB 4X4 Vortec 4.8L SFI,K&N air filter,Weathertech Floor Liners ,Weathertech Stone/Bug Deflector, Line X Spray On Bedliner, TruXport Rollup Tonneau Cover, Molded Mudguards, Viper 5701 LE 2 way Security Alarm/Remote Starter, Xm Satelite Radio,BILSTEIN 5100 rear shocks,BILSTEIN 5100 front levelling shocks,READYLIFT 2" rear lift blocks,Goodyear Wrangler Territorys -265/70R 17"

  6. #6


    Any amount of items is fine.
    well i recently bought the truck a 2001 reg cab short bed and its not too bad but i wanna make it quicker.
    yea a 7.0L would take care of the problem lol thanks!

    i just want to know from what people with alot of experience recommend for the best horse for ur money going from stock. the only thing i have on there is a AEM brute force air intake.

    ---------- Post added at 03:10 PM ---------- Previous post was at 03:07 PM ----------

    thanks bigbomber!

  7. #7


    Yeah I agree with headers. Then my next suggestion would be cam and tune.

  8. #8

    Join Date
    Jun 2006
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.


    N2O gives the most bang for the $$.
    A 5.3 swap gives the most reliability, mpg,for the $$-You can cam it, and change rear end gearing and get lots more acceleration-4.10 maybe
    You can get lots of power from a 5.3-cam, rev higher, change diff gears-heck if you have plenty of $$ get some aftermarket heads, headers,CAI, exhaust-higher stall speed converter(hurt mpg of course)
    1998 suburban-
    1/2 ton

    199500 miles

  9. #9


    really all depends on how much money and time you want to put into it. As most of the others said headers is a great place to start. then upgrades on your intake side can help some, but to get the most out of those you have to upgrade cam/heads, bump up compression, etc. Then other upgrades such as gearing or high stall converter that help you take advantage of that power.
    1986 Chevy G20 Tow Rig - 5.7 TBI conversion
    1978 Mustang II King Cobra Road Racer - Holley 650, MSD 6AL, 5 speed, 10 point Roll Cage, 9" posi, fuel cell, custom interior.

  10. #10


    In short, it is a slippery slope...

    Once you make one modification and realize the performance increase, you'll start itching to do another and another....

    If money is an issue, start slow and simple. Cold Air Intake, spark plugs and wires, under dirve pulleys. Then move onto headers and dual exhaust, cut the CAT's.

    Once you crack the motor open, might as well bundle your upgrades. CAM, ported heads, high flow intake manifold, larger TBI and injectors.

    Of course after all that a chip tune will be required.

    It more of a disease then a passion, once you have been bitten by the HP bug, ain't no goin' back.

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