Ryan’s ‘23 A91MT Burnout - Slow Build

[i3igpete]

I think i have a theory that this is indirectly caused by cold start noise reduction on catless DPs.

Quick update, it's been 4-ish months since i turned cold start noise reduction OFF. I've done a combo of a short trips, a few cars and coffee, and a 6 hour road trip to mid-O. Catalyst monitoring remains STOCK/ON and haven't had a CEL since.

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[ColonelAdama]

Quick update, it's been 4-ish months since i turned cold start noise reduction OFF. I've done a combo of a short trips, a few cars and coffee, and a 6 hour road trip to mid-O. Catalyst monitoring remains STOCK/ON and haven't had a CEL since.

Same. Cold start off for 6 months, only had it happen the one time (within the first month). 0 times since on custom map if that makes a diff

 

[swrdply400mrelay]

This means those of us in Commiefornia and similar shit hole cess pool political states are screwed, unless you want to dealer level flash (and pay probably a very large bill to do it) back to stock every 2 years.

Doesn’t MHD have a flash back to stock map? In their latest update v5.18 you can flash back to stock without re-locking.

 

[ColonelAdama]

Doesn’t MHD have a flash back to stock map? In their latest update v5.18 you can flash back to stock without re-locking.

well technically you could flash stage 0, stock map with MHD still installed (and its features). OR you could straight up uninstall MHD and lock the ecu.

Maybe this is a good update for those trying to pass emissions/inspection?

 

[RyanA90]

Quick update, it's been 4-ish months since i turned cold start noise reduction OFF. I've done a combo of a short trips, a few cars and coffee, and a 6 hour road trip to mid-O. Catalyst monitoring remains STOCK/ON and haven't had a CEL since.

What actually helped me that was recommended by my tuner (CD919), before I started to log was to change my downstream o2 sensor. That may have been my problem with a CEL popping up.

 

[swrdply400mrelay]

Confirmed today that CVN does indeed change with MHD.

This is my M240i before and after flashing it with MHD.

How did you get to this? On MHD app?

 

[razorlab]

How did you get to this? On MHD app?

MGFlasher app. You can use it without paying.

 

[RyanA90]

Dyno session today!

Tuned on MHD by CD919
Fuel e49

Run 1 4th gear
Run 2 & 3 5th gear

https://photos.app.goo.gl/vUu521DQntsiyrE36

https://photos.app.goo.gl/vUu521DQntsiyrE36

 

[ColonelAdama]

Dyno session today!

Tuned on MHD by CD919
Fuel e49

Run 1 4th gear
Run 2 & 3 5th gear

https://photos.app.goo.gl/vUu521DQntsiyrE36

https://photos.app.goo.gl/vUu521DQntsiyrE36

Very nice, will be tough to beat but ill give it a try!

 

[Eastwood]

Dyno session today!

Tuned on MHD by CD919
Fuel e49

Run 1 4th gear
Run 2 & 3 5th gear

https://photos.app.goo.gl/vUu521DQntsiyrE36

https://photos.app.goo.gl/vUu521DQntsiyrE36

Did your tune do a modest tune to preserve the clutch? Or was this his best?

 

[RyanA90]

Did your tune do a modest tune to preserve the clutch? Or was this his best?

From tuner:
“Consistency, safety and repeatability are always the priority over peak power or glory numbers.”

 

[RyanA90]

Upgraded the jack pads. Highly recommended!
https://www.bevinsee.com/products/b...for-bmw-e46-z4-e86-e89?variant=41896770797603

 

[swrdply400mrelay]

Upgraded the jack pads. Highly recommended!
https://www.bevinsee.com/products/b...for-bmw-e46-z4-e86-e89?variant=41896770797603

Do they scrape since they stick out a little more than stock?

 

[10.TKL]

Do they scrape since they stick out a little more than stock?

i've got these bulkier (40mm height)ones and i do not scrape, tho im stock height. his version(31mm height) is 9mm thinner. i once hit a deep pot hole pulling into a parking lot and i think it actually saved me from damaging anything else. tho if you use jackstands these might not have a snug fit, i got some circular jackstands for them instead.(unless you're using multiple jacks to prop up the car lol).

 

[RyanA90]

Do they scrape since they stick out a little more than stock?

They don't hang that much lower than oem, at most a quarter inch. I haven't scraped anything yet.

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