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4.8

This is a discussion on 4.8 within the Internal Engine forums, part of the LSx Technical Help Section category; Hello I'm new at this forum but I have a 4.8 vortec I'm looking to put a cam in and ...

  1. #1
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    4.8

    Hello I'm new at this forum but I have a 4.8 vortec I'm looking to put a cam in and of course other stuff...what should I start with

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    Black & Blue
    '02 WS.6 / '07 Suburban

    Welcome!

    One of the best upgrades for any LS engine is a set of long tube headers. There are also gains to be had with the induction system - just don't mess with the MAF. Once you install some upgrades then a tune is highly recommended to take advantage of what all has been done. What vehicle does the 4.8 reside in?

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    ..4.8

    [QUOTE=pajeff02;2937227]Welcome!

    The 4.8 is in a 01 Silverado and I have short tube headers on it now and a modified maf I wanna put comp cam k51-224-4 wat are your thoughts

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    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Not the right engine family. That is for
    Pontiac 265-455 c.i. 8 cyl. 1955-1981

    You need to look for GM GEN III family of motors (LSx 1997 - 2007).


    Here are several options from COMP Cams for your 4.8.
    COMP Cams: XFI™ Xtreme Truck



    Also when doing a camshaft swap WAIT on ordering push rods. You need to measure for them after the heads are installed. Reason why is if you have any work on the heads like milling (for flatness) the geometry of the valve train has changed. COMPCAMs sells a push rod checker for $20. You need the one that goes from 6.8" to 7.8" like so.

    COMP Cams: Hi-Tech Checking Pushrod 6.800"-7.800"

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    Okay wat about lifters valve springs and timing chain set? Someone told me its better to go ahead and change all that

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    Agree. And you may as well add an oil pump to the list as well.

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    I have the oil pump and some 60lb injectors and a 92mm throttle body As well idk wat kind of intake or cam kit to use

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    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
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    If you email Brian from BTR Racing or Martin from Tick Performance, let them know what you have and what your plans are they will both give you a package deal on what will work best for your goals.

    They both design cams and are very knowledgeable in LS motors.

    Hell I've read that guys are using 4.8 cranks and destroking 5.3 and 6.0 liters and using a cam design for 10,000 rpm runs with turbos and getting hellacious amounts of power/tq.
    Last edited by SMWS6TA; 09-09-2015 at 08:12 PM.

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    Great thankw

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