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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > New to MHD- Questions and observations



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      04-22-2017, 11:14 PM   #1
proj335i
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New to MHD- Questions and observations

2011 335i RWD MT only mods is PPK, PE exhaust and CP

I am using MHD stage one 91oct since one week and 500 miles and I am very impressed. I use to have a JB4 and MHD is much smoother.

I am using the cold start delete option and I maxed out the burble duration option.

I notice that my oil temperature goes up much quicker from cold to running operation. I own this car and do the same commute for the last 3 years and I would say the oil temperature needle starts to move 5 minutes faster than before MHD flash. How is that possible?

Second, on a initial cold start, I absolutely need to let the car warm up at least two minutes before driving it even if it is warm outside. If I don't, let say it idles for a minute and I take off, I have to give a lot of throttle and work the clutch a lot so the engine wont stall. After a few seconds of driving, everything goes back to normal. Could it be related with cold start delete option?

Also, is the engine has to reach a certain temperature for the computer to deliver the extra boost from the flash, in the same way JB4 does?

I also noticed that the burbles are more quiet than with PPK only. Again, could it be related to the maxed out burbles duration I chose? I used to like crisp gunshots PPK made with JB4.

Thanks for your help!
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      04-22-2017, 11:19 PM   #2
racermp
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I suggest following the other mhd n55 thread. Most questions are answered there already
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      04-22-2017, 11:22 PM   #3
proj335i
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Thanks I read most of the 140 pages...

I'll keep reading but any input is appreciated
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      04-23-2017, 01:55 AM   #4
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The car needs a few starts to adapt to the cold start delete. Bit it probably isn't all that unusual that it stalls more easily when cold. The higher idle revs from the cold start would have masked that.
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