M50 Eaton M90 build (stock alt PS pump location)

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  • Howms By Leo
    replied
    Originally posted by st.petebiodiesel
    Surprisingly I walked away from that one with only a couple of scratches and a sore neck.
    Back to the supercharger build,
    I'll be using this bypass valve. It's larger than the Bosch one and came with 3 different springs.
    I thought the vacuum line should go just downstream of the throttle body before the supercharger so that it will see vacuum at closed/partial throttle and open the bypass.
    I know lithium said it need to be after the supercharger outlet, but would it see vacuum at that location?



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    Love this build! Any updates?

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  • ForcedFirebird
    replied
    Updates? ;)

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  • stonea
    replied
    Sub'd! I love DIY SC builds

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  • Lithium
    replied
    Check out Ether-D's bypass - His is the way to go - I am changing mine.

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  • st.petebiodiesel
    replied
    Is the function of the bypass valve to only bypass at low throttle/idle? I thought they also would open at a certain boost pressure to regulate maximum boost, somewhat like a wastegate on a turbo.
    Does it matter what end of the bypass valve is the boost side or the dump side? I was going to make the shorter end the boost side, and the longer end the bypass/dump side. Although I've read about different orientations online some say it should go opposite of what I have described.


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  • Ether-D
    replied
    Originally posted by st.petebiodiesel
    I thought the vacuum line should go just downstream of the throttle body before the supercharger so that it will see vacuum at closed/partial throttle and open the bypass.
    This is how mine is set up and it feels right.

    Leave a comment:


  • st.petebiodiesel
    replied
    Surprisingly I walked away from that one with only a couple of scratches and a sore neck.
    Back to the supercharger build,
    I'll be using this bypass valve. It's larger than the Bosch one and came with 3 different springs.
    I thought the vacuum line should go just downstream of the throttle body before the supercharger so that it will see vacuum at closed/partial throttle and open the bypass.
    I know lithium said it need to be after the supercharger outlet, but would it see vacuum at that location?



    Sent from my iPhone using Tapatalk

    Leave a comment:


  • M-technik-3
    replied
    Originally posted by st.petebiodiesel
    Locked up the brakes on a hairpin and slid off the side of a cliff.
    Originally posted by Lithium
    Are you OK? The car looks like it had a pretty hard hit.
    OUCH that looked mighty painful.

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  • Lithium
    replied
    Are you OK? The car looks like it had a pretty hard hit.

    Leave a comment:


  • st.petebiodiesel
    replied
    Originally posted by ThatOneEuroE30
    How did you wreck?


    Locked up the brakes on a hairpin and slid off the side of a cliff.


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  • ThatOneEuroE30
    replied
    How did you wreck?

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  • Streichholzschächtelchen
    replied
    Damn! Keep us clued in on developments with the engine, hope all is well aside from the car

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  • george graves
    replied
    Originally posted by Streichholzschächtelchen
    Noice! I'm putting an m90 on an m30 and this is inspiring confidence.
    Might be going that route as well. Sub'ed for a nice build!

    Leave a comment:


  • st.petebiodiesel
    replied
    Unfortunately this setup will be going in a E36. I know r3v is a E30 forum. I recently crashed my E30 M60 swap in NC leaving the Vintage. My E30 got 250whp at the dyno, hopefully I can get 300whp from this setup.
    The swap is for sale. Asking $2500 includes engine, 5 speed trans(with flywheel/clutch), driveshaft, and 3.15 torsen LSD differential.


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  • Ether-D
    replied
    I was totally looking at the power steering pump pulley. Derp.

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