M@r said:{"]Just went out to mine and stuck my hand in there (feel like I've violated the poor thing) Anyway on the upper section of the ducts there is a grill, so looks like air is designed to go through there? Its on both sides though?
you are right in the M3 there was a connection between passenger side brake duct and the air box, not sure if this is the same on z4mc and car in garage so can't be bothered to check at moment.exdos said:M@r said:{"]Just went out to mine and stuck my hand in there (feel like I've violated the poor thing
Sounds right to me. IIRC the E46 M3 (with S54 engine) also has air intakes from both brake ducts plus one behind the opening of the bonnet.
exdos said:
Cheburator said:
IKZ4 said:
That's my whole point: the BMW engineers didn't leave much at all and I'm surprised that people on here say the Z4 MC doesn't use the "brake duct" as a cold feed into the air-intake system. But if that's so, I accept it. The BMW engineers have developed an enclosed air intake system which takes it's feeds from areas of high pressure, which they seem to have persisted with and developed in the E36 Z3 where the MC/MR has an extra intake located in the N/S "brake duct"; in the E46 M3 the intake is more complex where air inlets are located in both brake ducts and along the front bonnet edge. In the E92 M3, the inlets are even more developed where there's an additional one on the bonnet. BMW engineers have obviously realised that they're onto something with these designs.Cheburator said:That's a great idea. I am sure my M5 can do with a few extra ponies - I mean, them idiots at BMW left so much on the table, non?
Cheburator said:Exdos, I have a tantalising offer - I have to re-map my 500+ bhp racer since we installed ITBs and a dual plenum airbox. Dyno time is a bit expensive... So, here is my offer - since you can determine the increase in output from providing colder air with atomic clock-like accuracy, how about we use your butt dyno when we map the porker? Sarnies and beer afterwards are on me...
However, I don't use a butt dyno, I use a proper commercially available datalogger which reads directly from the car's ECU. It comes with bespoke software which works on a PC and all recorded parameters can be read and interpreted on screen. It also allows data export into other formats so that the information can be used in Excel to allow further interpretation in formulas to produce your own graphical presentation of the information. Provided your car has an OBDII socket it should be able to read whatever your ECU sees. I'm only reporting the information that datalogging produces, if you or others think that BMW, and all other manufacturers, install ECUs which tell lies, then so be it. Is your "tantalising offer" serious?exdos said:
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