Thread: M90 block off plate question

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  1. #1 M90 block off plate question 
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    Probably a stupid question, but why do you need to an M90 block off plate to turbo a gtp?
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  2. #2 Re: M90 block off plate question 
    GT Level Member andesmint's Avatar
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    The block off plate gets rid of the snout and the rotor pack. The main point of it is to eliminate the rotor pack as it causes restriction when it isn't spinning.
    2000 GT Mods: HAI, 10.5mm wires, rebuilt 60k motor, ZZP stainless headers, magnaflow mufflers, fresh paint job,L-67 top swap, Ported SC...
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  3. #3 Re: M90 block off plate question 
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    Quote Originally Posted by andesmint View Post
    The block off plate gets rid of the snout and the rotor pack. The main point of it is to eliminate the rotor pack as it causes restriction when it isn't spinning.
    So how does the supercharger work if the engine no longer powers it with the pulley?
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  4. #4 Re: M90 block off plate question 
    GTX Level Member industrialfish's Avatar
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    It doesn't... you are replacing the supercharger with a turbocharger.
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  5. #5 Re: M90 block off plate question 
    GT Level Member andesmint's Avatar
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    ^ what he said
    2000 GT Mods: HAI, 10.5mm wires, rebuilt 60k motor, ZZP stainless headers, magnaflow mufflers, fresh paint job,L-67 top swap, Ported SC...
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  6. #6 Re: M90 block off plate question 
    I live here. Slick2500's Avatar
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    A better solution is to use a modded l26 lim, with the injector bungs filled in, and a l26 upper intake manifold with a hv3 insert.
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    Superchargers take away horsepower
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