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How much can my stock internals take?

This is a discussion on How much can my stock internals take? within the Forced Induction forums, part of the LSx Technical Help Section category; I have a 99 SS with a MTI Heads & Cam pckg. already pushing 419rwhp and am looking at a ...

  1. #1
    Junior Member
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    1999 SS

    How much can my stock internals take?

    I have a 99 SS with a MTI Heads & Cam pckg. already pushing 419rwhp and am looking at a procharger d-1sc intercooled kit. Since I already have more power I was going to start off with 5psi. Is this too much for my stock internals? Really don't want to pull the motor and build it up. Low miles only 30k.

  2. #2
    Twin Turbo Terror anarchy99's Avatar
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    00 WS6 Trans Am

    If you stay around 5 psi, and around 550 psi, you should be fine with a good tune. Some engines last fine with 550 on stock internals, some blow stock, on stock internals. The tune is key.

  3. #3
    Nitrous Tuner LS2Tuner's Avatar
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    NO thats not too much. We have went 8-10 lbs. on stock shortblock.
    I would say the key to life period would be a good fuel system and a good tune!!!
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  4. #4
    Ultimate nothing
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    2000 Trans Am

    What is your current compression ratio and cam specs? You don't want to have boost bleeding off due to a narrow LSA, but you don't want to have your cylinder pressures spike either.

  5. #5
    Junior Member Turner8396's Avatar
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    1998 WS6 Trans Am

    I think your stock internals will handle the supercharger. I'm running 9 lbs of boost on my Vortech supercharger with intercooler. I'm running 10.45 @ 130mph. 1.391 60 ft time and yanking the front tires of the line.

  6. #6
    Awaiting Activation Liquifire's Avatar
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    You should be able to safely run 7 PSI with a good tune and fuel supply. Do check into your cam to see if the specs are suitable for FI purposes(most likely they are not designed for it)

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