Vacuum suction jet

hoveringuy · 10-03-2008, 12:39 PM

I know that it uses the venturi effect to creat suction, but why isn't the brake booster plumbed directly to the intake manifold for vacuum??

Why does the M54 have a suction jet where none of the previous motors did??

mkodama · 10-07-2008, 03:01 AM

Perhaps, the brakes on the previous models were too soft and instead of sourcing a smaller brake booster, BMW just inserting this venturi valve to reduce vacuum in the brake booster. End result would be stiffer, "sportier" feeling brakes.

Ashhong · 10-28-2008, 11:59 PM

question, if one of the tubes connected to this suction jet thing was broken, would it just get rid of the "sportier feel" of the brakes? or...am i in for more trouble

10-03-2008, 12:39 PM	#1
hoveringuy Registered User Join Date: Aug 2008 Location: Seattle Posts: 193 My Ride: e30 View My Garage	Vacuum suction jet I know that it uses the venturi effect to creat suction, but why isn't the brake booster plumbed directly to the intake manifold for vacuum?? Why does the M54 have a suction jet where none of the previous motors did??

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10-07-2008, 03:01 AM	#2
mkodama OEM ///Member Join Date: Oct 2006 Posts: 30,861 View My Garage	Perhaps, the brakes on the previous models were too soft and instead of sourcing a smaller brake booster, BMW just inserting this venturi valve to reduce vacuum in the brake booster. End result would be stiffer, "sportier" feeling brakes.

10-28-2008, 11:59 PM	#3
Ashhong Registered User Join Date: Sep 2008 Location: Irvine, CA Posts: 485 My Ride: 2002 325i View My Garage	question, if one of the tubes connected to this suction jet thing was broken, would it just get rid of the "sportier feel" of the brakes? or...am i in for more trouble