MBC on a diesel

[CONDYBOY]

Has anybody ever done this?

[timbo_1975]

Pretty common yes, but if you dont get any smoke as per standard tune, you will need to add some more fuel to match the increased air...

[CONDYBOY]

how is it done does anybody know?

[MrMopp]

What fitting the mbc or increasing the fueling ?

[CONDYBOY]

fitting the mbc. my cv system always runs at -25Hg and when the ecu decides to dump boost the vacuum pipe to the bov reads -25Hg there is no gradiation so how do you fit an mbc into this system, if I was to set it to dump when at -25Hg (the only vacuum reading I can get then the mbc won't actually change anything)

[timbo_1975]

Ahh you have the vacuum operated boost control system on the S40, much like VW uses.

In which case, you will need a tuning box or remap.

Tim..

[CONDYBOY]

cheers mate.