Purpose of the air intake pressure accumulator? - The Unofficial BMW M5 Messageboard (m5board.com)

///Manuel · 23rd October 2009, 02:42

Does anyone know what the purpose of that part is?

17

PRESSURE ACCUMULATOR

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davidoli · 23rd October 2009, 10:28

This part is particular to the 3.8 , which has a different trumpet / funnel into the airbox due to the additional ducting at the base which is then connected to the pressure accumulator #17 pictured .

The purpose of this accumulator is two fold , in that it increases the force under which the air is pushed into the airbox and also reduces the intake noise .

Very few 3.8 M5s have this part in place nowadays !

D

///Manuel · 23rd October 2009, 16:47

" ... in that it increases the force under which the air is pushed into the airbox ... "

Thanks for the reply, is there a more technical explanation on how it achieves this?
Does it help with smoothing out the airflow or does it work when off and on the gas?

davidoli · 24th October 2009, 11:33

If it's technical that you want , there's only one man for the job !

D