Technical Intake

wheela

Captain
Jun 4, 2021
1,432
828
0
Twin Cities, MN
Ride
2015 e84 X1 35i Msport
Wow, sorry to hear this. I'm interested to hear peoples' thoughts on this one. Can you post up some logs from your v3 tune? Somebody may be able to glean some clues there. Also, any pics of the carnage?

Edit: You're lucky your car didn't catch on fire...
 
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carabuser

Lieutenant
Vendor
Oct 2, 2019
981
1
1,009
0
UK
Ride
Z4 35i & 335i
Something was injecting fuel when it shouldn't. AFRs take a long time to fully lean out during over run.

Seems to be a lot of people having issues with Reflex. It was so promising to begin with but all I hear now is about their device failures and bad customer support.
 

SLOWESTN54

Captain
Feb 9, 2021
1,308
1,037
0
24
B.C. Canada
Ride
2007 E92 335i
Something was injecting fuel when it shouldn't. AFRs take a long time to fully lean out during over run.

Seems to be a lot of people having issues with Reflex. It was so promising to begin with but all I hear now is about their device failures and bad customer support.
oh what, Seriously?
 

wheela

Captain
Jun 4, 2021
1,432
828
0
Twin Cities, MN
Ride
2015 e84 X1 35i Msport
Do you have any logs with LTFT for bank 2? That will tell us if the DME is adding or cutting fuel to the target injection mass before applying the STFT percentage to hit target AFR.
 

desmo11

Lurker
Jan 10, 2024
17
5
0
Yeah, port injection with ethanol/methanol can lead to some fireworks. This is something that concerns me on the reflex that it doesn't have injection phase control. This can lead to a great deal of fuel in the manifold which can certainly explode when/if a backfire occurs. Examples of this are when the Honda indycars blew their plenums in the early '00s on the back straight at Indy.....they blew the engine covers off and put them into the golf course outside of the course.

One really wants well targeted injectors, lower duty cycle (say 50ish%), and MUST have phase control. Otherwise the fuel charge cannot really be tuned to enter the runner when the tuning pulse is optimally placed at the injector location at the time of injection. Bias of high/low injection and timing/tuning is a very big deal in engine development and can cause some real issues if not done properly.
 
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