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tune for PRC Stage 2.5 5.3L CNC Ported milled..

This is a discussion on tune for PRC Stage 2.5 5.3L CNC Ported milled.. within the Internal Engine forums, part of the LSx Technical Help Section category; ...

  1. #1
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    black
    1998 trans am

    tune for PRC Stage 2.5 5.3L CNC Ported milled..

    Just finished up putting a set of PRC Stage 2.5 5.3L CNC Ported Heads, cut down .030 on my all ready tuned full bolt on 228r cammed ls1, the car had a tune for the bolt ons and the cam. My question is do I have to have the car tuned right away or can I wait?
    I think I will need (or like) a bigger intake / throttle body in the future. Car currently has a ls6 intake and stock ported throttle body.
    I donít want to have to pay to have the car tuned twice. Once know with just the new heads and lifters and again if I decide to install say a fast 90 set up.
    Thanks as always for the help.

  2. #2
    Moderator 98TransAmWs-6's Avatar
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    Black/ Silver
    98 TA WS6/ 01 C5 Corvette

    It would not be wise to run heads ported that much without a tune imo. Why risk your engine when you can get a mail order tune for $150 to accommodate that and when you do the FAST you can then get a dynotune. This way you aren't paying for a dynotune twice but aren't running the engine untuned.
    1998 Trans Am WS6 - Phantom
    421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
    (Coming Soon) BMR DSL, UMI TQ Arm
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  3. #3
    Veteran 0rion's Avatar
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    06 duramax

    personally I would get it tuned......the heads will make a pretty large difference and you'll also want to make sure you're not getting detonation. The 98's have a pretty aggressive timing table to begin with. I run those same heads unmilled along with that same cam.

  4. #4
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    black
    1998 trans am

    thanks ill send it out to frost

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