N62 minimum valve lift

[garrett.fell]

Hello all. It's been a while since I've posted anything here - but I read this forum on a near daily basis.

So last night I decided to fiddle around with INPA/DIS and set the minimum valve opening from the stock .3mm to the "other" available setting of .8mm. Although I haven't had rough running problems on start in quite some time they've popped back up since it's become cold outside (Chicago). Even better it's not predictable. Sometimes it happens and other times it does not given basically the same low temperatures. I get random cylinder misfires on pretty much every single cylinder. It's not isolated to just a few.

Upon making this adjustment the engine stumbled a little bit and immediately seemed to run MUCH smoother. I am impressed!

Now during he procedure the software makes
Some references to the "downside" of doing this with worse gas mileage and performance "issues". It also suggests that it's not an approved function for the E53 but let's you do it anyway.

I guess I can understand the worsening gas mileage (probably attributed to idle fuel consumption) but don't really get the "performance" aspect of this unless you get less lift overall after making this adjustment. Also don't understand why it wouldn't be approved for the E53. The engine is an N62 but I believe it's been tweaked a bit for the E53 as the overall HP and torque specs and slightly different from the other applications.

I guess my question is - does anyone have any practical experience with making this adjustment and seen negative effects and put it back to the stock setting of .3mm? Thanks!




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