[b92]

Originally Posted by dpaul

Haven't looked at JB4 logs in a while but I don't think your throttle closures are significant at all. Timing looks very good but the best practice is to log all 6 cylinders. Boost and target track well up to 5500 rpm

I'm assuming you have stock turbos and significant miles on them. If so, perhaps it's not surprising that they can't hold your target boost above 5500 rpm particularly in the absence of inlets/outlets.

UNLESS this is a sudden change from previous behavior prior to the valve cover/low side catchcan/intake cleaning? If this is new behavior, a small boost leak might be possible.

Thanks. Stock turbos, 65k miles. I don't have any other recent logs that would help rule out any boost leaks related to the maintenance.

I noticed that WGDC increase correlates to the boost under target, but what I don't understand is how the car holds 17psi fine between 4k-5.5k with 40-50% WGDC, but then struggles when the target boost begins to taper off. If there was a boost leak, wouldn't it show itself earlier in the powerband?

[dpaul]

Originally Posted by b92

Thanks. Stock turbos, 65k miles. I don't have any other recent logs that would help rule out any boost leaks related to the maintenance.

I noticed that WGDC increase correlates to the boost under target, but what I don't understand is how the car holds 17psi fine between 4k-5.5k with 40-50% WGDC, but then struggles when the target boost begins to taper off. If there was a boost leak, wouldn't it show itself earlier in the powerband?

To be honest, I think you're getting all you're going to get.
If you don't have recent logs do you have some not-so-recent ones? Having a baseline is a good thing.

[b92]

Originally Posted by dpaul

To be honest, I think you're getting all you're going to get.
If you don't have recent logs do you have some not-so-recent ones? Having a baseline is a good thing.

Last good one I have is from June 2018, which shows boost on target.

But now that I'm thinking about it, I made some changes to the duty bias to combat 30FE overboost codes I was getting. I'll try adjusting menu 12 and take another log.

[Devildog0905]

Log showing the STFT and A/F at cruise:

https://datazap.me/u/devildog0905/st...og=0&data=3-24

Small pull:

https://datazap.me/u/devildog0905/sm...og=0&data=3-24

WOT pull (best I can get around here on snow tires):

https://datazap.me/u/devildog0905/wo...og=0&data=3-24

[Sgop335]

Originally Posted by b92

Thanks. Stock turbos, 65k miles.

I noticed that WGDC increase correlates to the boost under target, but what I don't understand is how the car holds 17psi fine between 4k-5.5k with 40-50% WGDC, but then struggles when the target boost begins to taper off. If there was a boost leak, wouldn't it show itself earlier in the powerband?

It could be the stock turbo curve and lack of inlets as dpaul suggest.
The engine can gulp more air flow at higher rpm making it harder to maintain boost. Not to mention w higher airflow you end up on the falling pressure curve of the turbo

[b92]

Originally Posted by Sgop335

It could be the stock turbo curve and lack of inlets as dpaul suggest.
The engine can gulp more air flow at higher rpm making it harder to maintain boost. Not to mention w higher airflow you end up on the falling pressure curve of the turbo

My intake filters are dirty as fuck right now, so I think that will be my first logical step. They've been cleaned a couple times but I think I'll just replace them this time around.

[Pete’s335is]

First time attempting to log my car. Could someone let me know if this is a useable log, and if not let me know where I messed up. The car is a FBO 335is running stage 2+, index 12 injectors, plugs recently replaced, all fluids flushed. If anyone with knowledge on reading logs could tell me how my cars handling the tune I would be very grateful. Thanks in advance!

https://datazap.me/u/petes335is/log-1578925184?log=0&data=2-3-4-5-11-12-13-17-20

[Pete’s335is]

Originally Posted by Pete’s335is

First time attempting to log my car. Could someone let me know if this is a useable log, and if not let me know where I messed up. The car is a FBO 335is running stage 2+, index 12 injectors, plugs recently replaced, all fluids flushed. If anyone with knowledge on reading logs could tell me how my cars handling the tune I would be very grateful. Thanks in advance!

https://datazap.me/u/petes335is/log-...11-12-13-17-20

Second Log done on MHD auto log
Second link:

https://datazap.me/u/petes335is/log-...ta=2-3-4-12-18

[Makoa6]

https://datazap.me/u/makoa6/2007-335...og=0&data=3-20

Hi,
Im having a issue with my setup. I have a 2007 335i e90 Manual 6 speed.
peviously Ive changed injectors, coils, spark plugs, vanos, oil filter housing gaskets, install oil catch can, new valve seals and cleaned head intake ports. head gasket, timing chain and guides, crankshaft sprocket, upgraded ecu to newer model and programmed CAS. Car was running perfect before installing aftermarket parts.
Last night i finished installing vrsf 5" intercooler, vrsf catless downpipes, charge pipes, HKS blowoff valves on my car and tested it out without MHD tune. I notice that my car would lag in power when I shift from 1-2 gear. When i step on the gas, feels like a loss of power for a couple seconds and then it picks up again.
So I thought maybe i need to update my ecu to MHD stage 2+ and it would fix this issue being that i have blow off valve etc...
I installed MHD stage 2+ and car seem to run smoother, but still had issue when shifting to next gear. Id get a lag in power. anyone know why? I wonder if it has to do with blow off valve? any help is appreciated. thank you in advance. I have attached a link above with my datalog in hopes that someone knowledgeable will be able to help me. thank you in advance.

[Xicor37]

Anyone care to have a look at this log. It's JB4 with MHD BEF

https://datazap.me/u/xicor37/log-157...14-17-18-24-35

[JM98]

Originally Posted by Xicor37

Anyone care to have a look at this log. It's JB4 with MHD BEF

https://datazap.me/u/xicor37/log-157...14-17-18-24-35

Looks really clean

[Xicor37]

Originally Posted by JM98

Looks really clean

Great. I just installed a walbro 525. Time to start playing with e85 mixes?

[Sgop335]

Originally Posted by Pete’s335is

Second Log done on MHD auto log
Second link:

https://datazap.me/u/petes335is/log-...ta=2-3-4-12-18

There are some unexplained timing drops..

Originally Posted by Xicor37

Anyone care to have a look at this log. It's JB4 with MHD BEF

https://datazap.me/u/xicor37/log-157...14-17-18-24-35

Spool is slow, did you get 30ff? Iat is ooc.

[Xicor37]

Originally Posted by Sgop335

There are some unexplained timing drops..


Spool is slow, did you get 30ff? Iat is ooc.

No codes but she has 180k miles so slow spool makes sense. Any ideas on the timing drops? Or what's wrong with the IAT?

[Sgop335]

Originally Posted by Xicor37

No codes but she has 180k miles so slow spool makes sense. Any ideas on the timing drops? Or what's wrong with the IAT?

Yea not bad at all for 180k, my turbos had to replaced much sooner. Iat is getting quite high.
Timing drop comment was for pete..

[JM98]

Originally Posted by Xicor37

Great. I just installed a walbro 525. Time to start playing with e85 mixes?

Send it. Just keep an eye on those IATs, they climbed pretty rapidly. You on stock intercooler?

[Pete’s335is]

Originally Posted by Sgop335

There are some unexplained timing drops..


Spool is slow, did you get 30ff? Iat is ooc.

Thanks for taking a look. Any idea on why the drops could be happening? Or where I should start looking?

Pretty sure I messed up on these logs as I didn’t turn DTC fully off and didn’t get on it hard enough. I’ve been meaning to get cleaner logs, and will post them when the weather clears up.

[iqraceworks]

When people say (if your low pressure fuel pump pressure is under 50psi, the pump is bad"....does that mean 49psi is good...50psi is bad? Or is it pretty obvious it's bad.....like the pressure just dives off down into the 30's? I'm hovering right around 52psi through the entire pull with my mhd stage 2+ tune.

[Silent9n54]

Originally Posted by iqraceworks

When people say (if your low pressure fuel pump pressure is under 50psi, the pump is bad"....does that mean 49psi is good...50psi is bad? Or is it pretty obvious it's bad.....like the pressure just dives off down into the 30's? I'm hovering right around 52psi through the entire pull with my mhd stage 2+ tune.

if you are on E85 maps 52psi throughout the pull is perfectly fine, even if it dips below 50 psi for a second that is fine as well, as long as it doesnt stay below 50psi for the entire pull.

[MY BM]

G'day everyone, posting from Sydney Australia.

I have recently purchased an N54 335i e92, loved the car stock but got the itch very quick and decided to spend some (a lot) of money on it

Anyway would love if anyone could go over this log I took today - I am open to all feedback (good, bad, whatever). I'm new to 335i's and infact turbo cars in general.

Been driving it around for a few days now in it's finished (for now lol) state, everything feels great and the car pulls amazing.

Completed a full service including the following: BOSCH coils/plugs, new valve cover gasket, oil filter housing gasket, serpentine belt, coolant flush, oil + filter

Mod list is:
7.5 inch VRSF FMIC
3" VRSF Catless Downpipes
BMS DCI
VRSF Chargepipe
Tial BOV (with BMS adapter to run proper 1/4inch hose)
MHD Stage 2+ Tune (98 OCT)
XHP Stage 3 Flash

https://datazap.me/u/georgealchami/t...og=0&data=3-22

Thanks in advance!

[Saif2018]

Bit of a noob here guys,

Currently stock except VRSF Charge Pipe, RB PCV Valve and XHP stage 3 Custom map.

I've had the following work done so far...

Turbos have uprated Incolnel wastegates fitted, oil filter housing gasket and valve cover gasket done. Gearbox filter, oil and Sleeves replaced. Serpentine belt and pulleys replaced, Vacumn lines replaced, main Sump gaskets done, front and rear crank seals replaced. Radiator replaced with hoses and Walnut blasted and plugs, air filter and cabin filters replaced and oil change done with Catsrol Edge 0w30.

Can you guys have a look and let me know if everything looks ok, before I go stage 1 with MHD?

https://datazap.me/u/shelim2020/stoc...ata=1-2-3-6-13

Thanks in advance guys.

[BM3Rrrr]

Originally Posted by MY BM

G'day everyone, posting from Sydney Australia.

I have recently purchased an N54 335i e92, loved the car stock but got the itch very quick and decided to spend some (a lot) of money on it

Anyway would love if anyone could go over this log I took today - I am open to all feedback (good, bad, whatever). I'm new to 335i's and infact turbo cars in general.

Been driving it around for a few days now in it's finished (for now lol) state, everything feels great and the car pulls amazing.

Completed a full service including the following: BOSCH coils/plugs, new valve cover gasket, oil filter housing gasket, serpentine belt, coolant flush, oil + filter

Mod list is:
7.5 inch VRSF FMIC
3" VRSF Catless Downpipes
BMS DCI
VRSF Chargepipe
Tial BOV (with BMS adapter to run proper 1/4inch hose)
MHD Stage 2+ Tune (98 OCT)
XHP Stage 3 Flash

https://datazap.me/u/georgealchami/t...og=0&data=3-22

Thanks in advance!

Couple of things:

STFT - Your bank 1 trims go lean at the lower rpm then go extremely rich at the upper rpm range.

AFR - they look terrible tbh, they should closely match each other all through the RPM range and not bounce around so much under no load.

Accel Ped Pos% - You never go WOT until 5200RPM, need to got on the gas from 2500RPM all the way until 6000RPM