[Hockeytyme]

Originally Posted by FloridaM5

Also not sure on the reason, but on a quarter mile run, as soon as the shift to 4th gear happens, dme boost target drops and the cars stops adding fuel (still will run 10.2-10.3 at 136-7, but feels like leaving some on the table). Lots of logs showing this behavior. 60-130 runs dont see this happen.

No matter the tune I see that in 5th and 6th gear

[FloridaM5]

Originally Posted by Hockeytyme

No matter the tune I see that in 5th and 6th gear

weird man. was going to ask you since you now have several ecu files to look at. wonder why the car does it....and it's odd mine starts to decay in 4th, and yours starts to decay in 5th. this is way above my pay grade, but would love to know why the car does it

[Higgs Boson]

I realize most tunes turn off cat warmup and cat related CEL but are they also manipulating inferred cat temps and/or turning off cat overtemp functionality? If the ECM thinks the cats are getting hot it can take measures to cool them (even if there aren't any installed), this usually takes place after sustained load as described.

[Hockeytyme]

Originally Posted by Higgs Boson

I realize most tunes turn off cat warmup and cat related CEL but are they also manipulating inferred cat temps and/or turning off cat overtemp functionality? If the ECM thinks the cats are getting hot it can take measures to cool them (even if there aren't any installed), this usually takes place after sustained load as described.

Those are interesting questions/statements that I would like to know more about for sure.

[Mcc420]

Which downpipes are you running ? And what size 3" or 3.5"?

[Fuel-It!]

Originally Posted by Higgs Boson

I realize most tunes turn off cat warmup and cat related CEL but are they also manipulating inferred cat temps and/or turning off cat overtemp functionality? If the ECM thinks the cats are getting hot it can take measures to cool them (even if there aren't any installed), this usually takes place after sustained load as described.

I know the JB4 has a modeled EGT function it uses as part of its boost control routine. Not sure how it's set or how the flash guys are handling it.

[Higgs Boson]

Originally Posted by Fuel-It!

I know the JB4 has a modeled EGT function it uses as part of its boost control routine. Not sure how it's set or how the flash guys are handling it.

EGT are typically measured before the turbo and therefore before the cat as well, usually separate data from cat temp. but I am asking not telling since I am not completely familiar with BMW's calibration logic.

[Fuel-It!]

There are no EGT sensors on the vehicle, the DME models EGT to enrich AFR as modeled EGT increases, and the JB4 has a similar algorithm in parallel used for it's targeting. As to how the flash tuners handle those corrections it would vary wildly based on the flash I presume.

[Higgs Boson]

Originally Posted by Fuel-It!

There are no EGT sensors on the vehicle, the DME models EGT to enrich AFR as modeled EGT increases, and the JB4 has a similar algorithm in parallel used for it's targeting. As to how the flash tuners handle those corrections it would vary wildly based on the flash I presume.

Agreed, I was just trying to clarify that EGT and Cat Temps are two different measurements, whether measured or modeled. My question was specifically regarding Cat Temps.

[northtorque]

Originally Posted by Hockeytyme

World Record 9.93s @ 139.37 MPH
World Record 2.49 0-60
World Record 6.42 1/8th mile
.

Hot damn - a hat trick

[Hockeytyme]

Originally Posted by northtorque

Hot damn - a hat trick

[prodigymb]

Originally Posted by Hockeytyme

No matter the tune I see that in 5th and 6th gear

mine does it too, most noticeable in 5th gear and on.

i think its the TCU torque limits.

[MuffinFlavored]

Originally Posted by FloridaM5

weird man. was going to ask you since you now have several ecu files to look at. wonder why the car does it....and it's odd mine starts to decay in 4th, and yours starts to decay in 5th. this is way above my pay grade, but would love to know why the car does it

any updates/progress on this? is it confirmed TCU?

[shahin]

Originally Posted by Hockeytyme

Have you changed your sparkplugs or still stock?
If you did, what brand and gapping?

Thank you in advanced

[p.mf10]

Have you guys figured out what the issue is ? friend of mine is having the same problem with his f90 running snow performance meth. It's not consistent, fifth gear the car just doesn't pull.

[shahin]

Originally Posted by E92TTKING

anyone in here running r888 on stock wheels? What sizes seem to work best for the front and rear? Thanks!

285/30/20
All around square setup
Amazing results

[Hockeytyme]

Originally Posted by shahin

Have you changed your sparkplugs or still stock?
If you did, what brand and gapping?

Thank you in advanced

I did change them once and I used the stock plugs but gapped them 22-24.

[ss_m5]

Originally Posted by Hockeytyme

I did change them once and I used the stock plugs but gapped them 22-24.

Hi did you go with OEM plugs or One-Step colder?

I need to start thinking about plugs. I'm nearing 10k on the car. I've been running a stage 2 e30 for about 3k.

Thanks

[Hockeytyme]

Originally Posted by ss_m5

Hi did you go with OEM plugs or One-Step colder?

I need to start thinking about plugs. I'm nearing 10k on the car. I've been running a stage 2 e30 for about 3k.

Thanks

OEM

[shahin]

The Gents with higher gear issues, did you figure out what was
Causing this?

[Hockeytyme]

Originally Posted by shahin

The Gents with higher gear issues, did you figure out what was
Causing this?

Nothing guaranteed however I do notice that as the run goes on the IATs go up and the boost goes down. Could have something to do with it. Post intercooler Meth can help with this but times won't change much

[luchocamp]

Originally Posted by Hockeytyme

So it appears that the Russians aren't happy with my results. They chimed in all of DME, Weistec, and my IG posts saying it's not the world record. They claim to have a 9.91 but they have no time slip or Dragy?

I was annoyed enough that I gave it another shot. Considering I didn't have a great great DA and it's warmer out. DME just keeps charging!

I broke all 3 of those records again.. lmao

I can't imagine if I pulled the seats and had a prepped track on 20" wheels!

Congrats 9.89 stock turbos is a fantastic result.
Keep it up !