Quick dumb question

[89AlpineM3]

Where would I run the brake booster vacuum line if I have deleted the stock S54 intake housing?

[Liquidity]

Any large port that's between the throttle body and engine is fine. Must be between the throttle and engine or else it won't see any vacuum when you lift off the gas and will defeat the purpose of the booster.

[DesertBMW]

Where would I run the brake booster vacuum line if I have deleted the stock S54 intake housing?

Intake housing has nothing to do with vacuum source. You would run the booster hose to the same location as it is in 2003 M3.

Any large port that's between the throttle body and engine is fine. Must be between the throttle and engine or else it won't see any vacuum when you lift off the gas and will defeat the purpose of the booster.

LOL, that answer is funnier than the question.

[Liquidity]

LOL, that answer is funnier than the question.

Why's that? An engine is an engine. On any engine the greatest vacuum is developed between the throttle body and the intake valves when the throttle is closed. This is where the booster gets its vacuum from on every engine with a throttle plate.

Intake housing has nothing to do with vacuum source. You would run the booster hose to the same location as it is in 2003 M3.

And where would that be? Something tells me he doesn't have a 2003 M3 sitting right next to him or else he wouldn't need to ask the question.

[89AlpineM3]

Ya that was my question is I don't have another M3 to look at currently

[DesertBMW]

Why's that? An engine is an engine. On any engine the greatest vacuum is developed between the throttle body and the intake valves when the throttle is closed. .

There you go

Ya that was my question is I don't have another M3 to look at currently

You had the M3 there when you were removing that S54, so you did not take any photos? Didn't remember were it goes

[89AlpineM3]

Got my answer , runs off the vacuum line next to the fuel rail... Not where a stock E46 had it as that wouldn't have helped

[DesertBMW]

Got my answer , runs off the vacuum line next to the fuel rail... Not where a stock E46 had it as that wouldn't have helped

E46 has to get it from there because that is the only vacuum source on the whole engine.