Does anyone have a built 5.3?

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by mrbrown88, Jan 6, 2014.

  1. mrbrown88

    mrbrown88 New Member

    I'm looking for advice on this. I was recently considering getting rid of my truck to get something that doesn't burn oil and shut off cylinders like the 5.3 and something with the power of the 6.2.

    I'm looking to get a programmer soon to disable the AFM to solve that issue, but what else could I do to build this motor? I have searched through multiple forums to see if anyone has built a 5.3 to get a good amount of power out of it with no avail.

    To the best of my knowledge the 5.3 is built on the LS platform, but can LS parts be put directly on this motor?

    Any advice is appreciated and if this is a dumb question please be easy on me.:oops:
  2. Enkeiavalanche

    Enkeiavalanche Moderator

  3. the phantom

    the phantom New Member

    From what a mechanic told me was that the chevy engines can be built as far as your wallet will let you go. supercharger, cam, high comp pistons, the list can go on.
  4. Kapelusprime

    Kapelusprime New Member

    Youtube it, the lower end on the 5.3 is good to go. It's the lifters and cam that most guys swap. Comp cams makes a line of cam's called thumper. Cam and headers with a program on a 5.3 can put you easily into the upper 300's Hp at the rear wheels range. Just don't overlook what many if not all of the guys who super charge do. They have put money into the trans for a more responsive solenoid and better drive shaft. The 400 to 450 Hp mark with a stock trans dose not hold up. Many guys on the forums and there are a few examples on youtube of guys scattering their stock trans or drive shaft with a screw on the 5.3 V 8. In fact youtube cam' ed 5.3 and you'll get twenty or so hits. I live around the corner from Tonawanda powertrain engine plant, got relatives that work there too. The autorama and Buffalo Auto Show every spring is a great place to meet Engineers from the plant, ask what they have done to their cars and trucks. Watched them build a 6.2 from the ground up right there at the show last year. A consensuses there was, if your going to super charge your truck or car with a 5.3 or 6.2 you need to do some trans and drive line upgrades too, in order to keep from untimely failure.
  5. dave13net

    dave13net New Member

    truckin mag. did a mild to wild build on this motor. great information and graphs,motor is referred to as Lm7
    hope this helps
  6. buckmeister2

    buckmeister2 New Member

    I just read the cited article...Holy Crap! Those are some outrageous numbers. Really makes me want to do the first step build on my 176K 5.3. The only problem is, even with the mildest build, the tranny has to be beefed up, meaning more $$$. Who has info on mild tranny builds to handle 450HP? Thanks!
  7. BurbanMan

    BurbanMan Member

    Nelson racing engines uses a 5.3 as their test mule. Hear built 2500hp ls engines. They primarily do twin turbo builds and are real bad a$$ Look him up on YouTube
  8. KyleZ71

    KyleZ71 New Member

  9. stchman

    stchman New Member

    I assume that if you build a 5.3L that it won't be a daily driver.

    What's your budget? How much HP are you looking for?
  10. badazz2013

    badazz2013 New Member

    is there a way to disable the motor from switching from 8 cylinders to 4 cylinders so its constantly running on 8 instead of 4?
  11. KyleZ71

    KyleZ71 New Member

    Yes, you will need a programmer such as a diablosport predator
  12. SAGO

    SAGO New Member

    If possible find a motor from a wrecked 2005 extra cab small box with 4x4 not z71. Those motors are known as a L33, Based around the LS motors. Its an aluminum block and heads motor, no need to swap the intake (you will loose power). This motor has a few extra ponys, and torque. Good luck!!
  13. Kapelusprime

    Kapelusprime New Member


    Yes the diablo series of programers, I have the intune and love it. There is also the "Ranger" they are under dash CAN port plug in. There is one to make you run on 4 cylinder longer and one to turn off AFM.
  14. Cowpie

    Cowpie Member

    The Range module from Range Technologies is the cheapest way to disable the V4/V8 function and have a true V8 all the time. You can get them from Auto Anything for around $160. They just plug into the OBD port and work in the background just sending a signal to the ECM to not go into AFM mode. For those that are worried about warranty issues and are not really looking at a performance tune, this is the cheapest way to go and it works great. That is how I disabled mine the day after I bought it new and brought it home. I will be moving up to a Diablo Intune soon, so will do the AFM disable permanently with that.

    Oh, at Auto Anything website, they list the Range module higher than I stated. Just do a chat session on their forum and ask for a better price. They should come back with the $160 I stated, and free shipping. A couple of folks just did that recently, so it is true.
  15. mrbrown88

    mrbrown88 New Member

    This will not be my daily driver. I would say I have a budget of $4-5,000 looking for a horsepower range of upper 300's to lower 400's. Don't know if this is even possible, may just be wishful thinking :money:
  16. TRPLXL2

    TRPLXL2 New Member

    Cam swap and supporting mods cost me almost $3,000 for my 5.7, ls parts are not cheap lol!
  17. stchman

    stchman New Member

    The stock 5.3L already has 315HP and the stock 6.2L has 403HP. I don't mean to offend you, but IMO you could better spend $4-$5K in other areas.

    A simple ECU tune can net you ~20 more HP which brings the total up.

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