Trying to determine what the two lines entering the SC input elbow are for. Any ideas?
Also, what to do with them when using the K&N HAI system.
Thanks

 

What do you mean by lines? If you mean electrical leads, they're probably the MAP & TMAP sensors. If you mean hoses, they're probably the bypass hoses?

Here's an excerpt from BMW Technical Training Manual, "History and Introduction of the MINI":

TMap Sensor (MINI Cooper S)
On the MINI Cooper S the pressure differential is measured across the supercharger to determine the manifold air density.
To measure this differential two sensors are fitted, one on either side of the supercharger. The TMAP is fitted on the manifold pressure side and has the same hardware specification as the MINI Cooper sensor but the maximum pressure range is 250Kpa. The MAP sensor is fitted upstream of the TMAP between the supercharger and the throttle body and measures the atmospheric pressure. This sensor is the same as the MINI Cooper TMAP but will not have the temperature sensor.
The TMAP sensor is located in the intake manifold where it is exposed to higher than atmospheric pressures as produced by the supercharger. The MAP sensor is located between the supercharger and the EDR, a location not effected by additional pressures from the supercharger.
The first job of the MAP sensor is the measurement of the barometric pressure. Whenever the ignition key is in the "ON" position and the EMS2000 is supplied power from the Main Relay there is no piston action yet and the only reading sent to the computer is the barometric pressure signal (High Voltage).
Second, it measures the absolute pressure in the intake manifold. Absolute pressure is barometric pressure minus the vacuum created by the pistons. So, if the barometer is reading 1.5 Bar at sea level and the manifold vacuum (gauge) is 1.0 Bar at idle, the manifold absolute pressure would be .5 Bar.
The EMS2000 compares the voltage outputs from the MAP sensor (ahead of the supercharger) to the outputs received from the TMAP (subject to increased pressures from the supercharger) and calculates air volume drawn into the engine.

Supercharger Operation
The supercharger is a positive displacement pump. Its purpose is to increase air pressure and density in the intake manifold. The supercharger is matched to the engine by its displacement and belt ratio (driven from the crankshaft).
The concentrated charge of air provided by the supercharger results in a more powerful combustion stroke in the engine's cylinders, resulting in improved performance over non-supercharged engines.
The supercharger incorporates a specially designed bypass valve. This is actuated by a vacuum pipe near the throttle body and re-circulates the supercharged air when boost is not required.
During typical driving conditions the intake manifold is under pressure for only 5% of the time.
For the remaining time the intake manifold is under vacuum (negative presure), allowing for better fuel economy and a quieter ride.
Inside the supercharger the helix angled rotors and specially designed inlet and outlet port geometry reduce pressure variations. This results in a smooth discharge flow and a lower level of noise during operation. The way in which the ducting to and from the supercharger is mounted also plays a major role in reducing noise.

 

well done Tarzan

can i ask where does one aquire a copy of this BMW technical training Manual

me would like a copy of that please

 

http://www.minitechinfo.com/

This is BMW's technical information site, specific to MINI cars (www.bmwtechinfo.com for BMW cars).
It contains the following information:

Bulletins
Service and Technical Reference information - Search by: General, Symptom, Component, Campaign, Bulletin number, Issue date, or What's New

Training
Service Training Reference Manuals - Complete vehicle and System diagnosis training information.

Electrical Troubleshooting
Wiring diagrams and diagnostic viewer

Special Tools
Search for BMW Group special tools by Part Number, Description, Model, Group, or Browse through each tool

Purchase Materials
Special Tools and Service Information materials can be purchased


It is available by subscription only (Paypal). I did the 24-hour subscription and printed off every page of info I could in allotted time. I needed every minute, so before you subscribe, buy a case of paper from Costco, several printer cartridges, and choose your start time when you can take the most advantage of it.

(What's sicker than the fact that I printed every page is that I've also read every page)--ten 3" binders full of info.

I am happy to answer questions, look up information, and bring along reference material to club functions or by request. I didn't get the wiring diagrams, unfortunately.

Subscription Rates:

1-Day (24 hour) Subscription: $25

1-Month (30-days) Subscription:

$300 1-Year Subscription: $2500

 

They are definitely hoses. If they are bypass, is it ok to disconnect from the elbow & put small filters on the ends?
This would enable me to hook up the K&N HAI setup.

 

I just went out and looked at my 2005 MCS -

Unlike my 2002 MCS, where there was a single hose that tees into the side of the main intake pipe, there are now two hoses. It appears that one of them is the same one that was there in 2002, and there's a new one right next to it that has a couple smaller hoses attached to it -- it looks like one may have a check valve in it.

So, it looks like my Alta Silicone hose won't work on this 2005. Anybody interested in a used Alta Silicone hose (Red)?

 

Check the sticker on the plastic divider near the passenger cowl vent, it should have a vacuum diagram on it.

 

We recently dicovered this also. One fitting goes to the brake booster and the other back to the crank case. A simple tee will fix this and it will be something we supply with our newer intake systems. If anyone has purchased the intake sytem and needs this tee please call us and we can ship one to you right away.

So there is no need to throw you older parts away, or sell them!

The car we saw this weekend was an Automatic Cooper S. Is your car an auto or manual?

 

It's an automatic. Looks like the second vacuum line is exclusive to these. Thanks for the information.