M50 Eaton M90 build (stock alt PS pump location)

[george graves]

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!

[Streichholzschächtelchen]

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

[ThatOneEuroE30]

How did you wreck?

[st.petebiodiesel]

How did you wreck?

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


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[Lithium]

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

[M-technik-3]

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

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

OUCH that looked mighty painful.

[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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[Ether-D]

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.

[st.petebiodiesel]

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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[Lithium]

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

[stonea]

Sub'd! I love DIY SC builds

[ForcedFirebird]

Updates? ;)

[Howms By Leo]

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?