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boosted LSX?

This is a discussion on boosted LSX? within the GTO forums, part of the Vehicle Specific category; I was always taught with a C.R. higher than 9-9.5 adding boost is a no-no, unless you have a billet ...

  1. #1
    Member 05gtoautoX's Avatar
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    Impulse Blue
    2006 Pontiac G.T.O.

    boosted LSX?

    I was always taught with a C.R. higher than 9-9.5 adding boost is a no-no, unless you have a billet crank, powder forged rods etc. now I see alot of LSX engines on here with turbos and superchargers, and I know the C.R. is higher than that on LSXs, I mean how long can you expect to run these engines? Is there an overdrive pulley that allows you to reduce boost to like 4-6 psi? what about the wastegates? what are your horsepwer gains with this low of boost? I'd like to hear back from some of you guys, I've been interested in a SC for a while now, and I build engines for alot of people mainly pontiacs and old school carbureted engines, so I'm not really green, it just goes against how I was taught.Obviously it works for you guys though and I'm sure it si possible, but damn, talk about some stress on alot of components.
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    Grand Imperial Wizard Sarge's Avatar
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    Yup...many do not calculate or design...they bolt on and go....I agree it is not a big suprise when rods go through blocks....and you wont have any trouble finding "ads" from power adders saying " Gain this many HP by bolting on our blower"...which feeds the masses and eliminates accepted engine design and physics.....

  3. #3
    Member 05gtoautoX's Avatar
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    2006 Pontiac G.T.O.

    It's one thing when you have an engine built for a blower, but I would say the C.R. is too high, see the thing is I have a friend who has a 2003 Vette c5, and he blew the engine up while racing it, and now he wants me to rebuild it and put on a blower for him, I looked up the compression Ratio and it was like 10.5:1 and I told him no, and that I absolutely refused to put a blower on it, but now I guess I should have just done it, it probably would have lasted for a while, I feel bad now cause he's having the local shop doit now and I know they're not going to take care if it as well as I would of. oh well, what the hell

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