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the truth about APS

This is a discussion on the truth about APS within the Forced Induction forums, part of the LSx Technical Help Section category; STS seems to have gotten a bad rap here for some reason. I'm VERY happy with mine. What exactly do ...

  1. #21
    Junior Member rick67's Avatar
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    STS seems to have gotten a bad rap here for some reason.
    I'm VERY happy with mine.
    What exactly do people not like about rear mount turbos?
    1999 T/A LS1
    STS rear mount turbo - 5 psi
    48# Injectors, 3600 Yank converter
    Other that that, all stock.
    Best ET so far, 11.91 @ 114.47 w/1.60 60'

  2. #22
    COTM July '09
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    Quote Originally Posted by rick67 View Post
    STS seems to have gotten a bad rap here for some reason.
    I'm VERY happy with mine.
    What exactly do people not like about rear mount turbos?
    the fact that it mounts in the rear and its limitations

  3. #23
    Junior Member rick67's Avatar
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    Quote Originally Posted by That Guy 2-1 View Post
    the fact that it mounts in the rear and its limitations
    Please forgive my ignorance... I'm new to F-bodys and Turbos in general...
    I've read that opinion, but don't understand it.

    What's wrong about having it in the back? From what I read other places, it actually has benefits from being back there..... (turbo stays cooler so no turbo timer required, it's somewhat self intercooled because of the long pipe going to the engine, engine compartment stays cooler, exhaust can/should remain stock, etc...)

    And what limitations does it have that a front mounted pair of twins wouldn't have?

  4. #24
    COTM July '09
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    Quote Originally Posted by rick67 View Post
    Please forgive my ignorance... I'm new to F-bodys and Turbos in general...
    I've read that opinion, but don't understand it.

    What's wrong about having it in the back? From what I read other places, it actually has benefits from being back there..... (turbo stays cooler so no turbo timer required, it's somewhat self intercooled because of the long pipe going to the engine, engine compartment stays cooler, exhaust can/should remain stock, etc...)

    And what limitations does it have that a front mounted pair of twins wouldn't have?
    Well for a street car owner who wants a few psi, it's fine in its stock state. But, when you start pushing the numbers many have hit a wall and have had to either replace or redesign aspects of it. For example, having to wrap the entire exhaust system to keep the heat in so the turbo would work more efficiently. Yes, the air charge runs cooler compared to a under-hood mounted setup (you still need an intercooler up front to run some decent boost too), but it's the heat in the exhaust that keeps the turbine spinning more efficiently. You're also restricted on what size turbo's you can run with the stock piping. A front mounted twin setup would have much better response compared to a rear mounted single; also front mounted single will be more responsive than a rear (given everything else stays the same).
    Last edited by Mean Green Z28; 08-26-2009 at 12:36 PM.

  5. #25
    Junior Member BIG_MIKE2005's Avatar
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    1999 Trans Am WS6

    There is always Josh @ Kentucky Turbo, he builds beautiful turbo kits & there is also George from TTI. Either place is well known & stands next to their products on top of being American made instead of sending your money overseas.
    http://i21.photobucket.com/albums/b2...34244289-L.jpg
    99' NBM WS6 6-speed
    Mods:Stock bottom end-224/.581 114-TR 7.4's-P/P & milled .018" 5.3's-P/P TB-LS7 lifters-LS7 clutch-LS2 flywheel-MTI lid-Pacesetter LT's-TSP ORY-Hooker Aerochamber

  6. #26
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    Quote Originally Posted by BIG_MIKE2005 View Post
    There is always Josh @ Kentucky Turbo, he builds beautiful turbo kits & there is also George from TTI. Either place is well known & stands next to their products on top of being American made instead of sending your money overseas.
    +1

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  7. #27
    Senior Member FasstChevys's Avatar
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    Quote Originally Posted by BIG_MIKE2005 View Post
    There is always Josh @ Kentucky Turbo, he builds beautiful turbo kits & there is also George from TTI. Either place is well known & stands next to their products on top of being American made instead of sending your money overseas.
    word for word on this bud


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