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      02-12-2013, 09:25 AM   #46
135i_vs_
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Drives: M5(sold), 135i(sold), 335d
Join Date: Sep 2011
Location: NY

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An interesting observation I wanted to bring up in this thread: The reason why no one with a tune (JBD, Evolve, etc.) posted issues with carbon build up, etc.

The best way I can explain this is:

All tunes for diesels = More Fuel Volume

More Fuel Volume = More Air Necessary

In the M57, More Air is controlled by giving LESS EGR (hence more Oxygen).

LESS EGR = Less soot and less carbon
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