[cmcgonag]

Originally Posted by Saif2018

Had a look at the stage 1 v9 map, wgdc reaching 70% and off boost target throughout the pull indicates most likely a boost leak.

Also the I'd stick to v9 maps, stage 1+ was v8 map and it looks worse than the stage 1v9 map, probably made worse by your boost leak, but v9 should run better.

You may not have a 30FF code but still a good idea to follow the advice here to rule out boost leaks.

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/

Smoke testing is also a good idea.

At what RPM are you seeing the 70%? And what would "normal" be at that RPM?

[Saif2018]

Originally Posted by cmcgonag

At what RPM are you seeing the 70%? And what would "normal" be at that RPM?

I'm getting 65% WGDC max on a custom tune ~20psi tapering to 16psi

WGDC should go almost 100% when you go WOT and then drop as you reach boost target and max out around 50-55% at stage 1/1+

Have a read through the attached pdf for a basic guide on reading Datalogs

[cmcgonag]

Originally Posted by Saif2018

I'm getting 65% WGDC max on a custom tune ~20psi tapering to 16psi

WGDC should go almost 100% when you go WOT and then drop as you reach boost target and max out around 50-55% at stage 1/1+

Have a read through the attached pdf for a basic guide on reading Datalogs

Got it I was looking at WGDC after PID not Bank 1. Thanks!

[Saif2018]

Originally Posted by cmcgonag

Got it I was looking at WGDC after PID not Bank 1. Thanks!

No worries mate.

[bernardo774]

still someone using V5 E40 maps?

[iqraceworks]

So I recently was on the highway cruising along while I slowly rolled onto the car and the car lost all power and started shaking pretty bad and gave a check engine light. I limped it up, scanned for codes...and got a 29DC Injector Cutout code, and some O2 senor codes.

I tried to restart the car, and it fired up but idled so rough that it died. I tried it again, and it fired up perfecly...nice and smooth. So I let the car sit..didn't want to mess with it.

So...I went out tonight after work and tried to get a nice clean log showing what's going on. I slowly rolled onto the throttle in 3rd gear. The car fired up and ran nice and smooth.

As I'm rolling into the gas in 3rd gear, at around 3,000rpms with only 4psi of boost the HPDP pressure just tanked...it dropped from around 1,200psi down to 215psi. As soon as I let off the throttle, it bounced back up to 2,800rpms.

Both banks STFT jumped up to 34% (trying to correct a lean condition). If this was a stuck injector, I don't think both banks would be equal...one would be way rich or way lean....right?

At this point........I'm pretty sure it's a HPFP issue. What am I missing here?

https://datazap.me/u/iqraceworks/3rd...-24&zoom=59-83

[AmexXpress]

https://datazap.me/u/amexxpress/914?...o=23&zoom=0-97

I'm way under boost CSN someone help me understand my datalog?
I have new boost solenoids coming in today as well as spare high temp
Vacuum line

[studio54]

V5 log on 91 Oct

Hello, i just logged V5.1 Stage 2+ yesterday on 91oct.

Some ppl were curious to know if V5 is also good on 91oct since V5 is known to be one of the faster OTS map for its E40 version.

Link V5 : https://datazap.me/u/studio54/log-16...og=0&data=3-20

100-200kph or 62 mph-124mph (MHD speed): 9.67

Link V9 to compare : https://datazap.me/u/studio54/log-16...og=0&data=3-22

100-200kph (MHD speed): 9.69

Exact same setup, same road, same gas, very similar IAT (79°F on V5 vs 80°F on V9). (Sorry, one log is in °F/mph, another log is in °C/kph, wasn't using the same phone to log)

V5 feels strong, as strong as the V9, but with the V7 feeling at low RPM which is great.

I am running the same gas as on the V9, so I guess the almost lack of timing corrections on V5 is due to the desensitized knock tables. The V5 map looks like it's very raw compared to the V9. When you look at the boost target or load request, you can see it's flat all time, but it feels smooth and powerful to drive. WGDC looks a bit erratic.

That said, it applies a lot of boost to stock turbos, like the V9, maybe it's a better for them to stay on V7.

Next time i log V7 with the same exact setup.

[Saif2018]

Originally Posted by studio54

V5 log on 91 Oct

Hello, i just logged V5.1 Stage 2+ yesterday on 91oct.

Some ppl were curious to know if V5 is also good on 91oct since V5 is known to be one of the faster OTS map for its E40 version.

Link V5 : https://datazap.me/u/studio54/log-16...og=0&data=3-20

100-200kph or 62 mph-124mph (MHD speed): 9.67

Link V9 to compare : https://datazap.me/u/studio54/log-16...og=0&data=3-22

100-200kph (MHD speed): 9.69

Exact same setup, same road, same gas, very similar IAT (79°F on V5 vs 80°F on V9). (Sorry, one log is in °F/mph, another log is in °C/kph, wasn't using the same phone to log)

V5 feels strong, as strong as the V9, but with the V7 feeling at low RPM which is great.

I am running the same gas as on the V9, so I guess the almost lack of timing corrections on V5 is due to the desensitized knock tables. The V5 map looks like it's very raw compared to the V9. When you look at the boost target or load request, you can see it's flat all time, but it feels smooth and powerful to drive. WGDC looks a bit erratic.

That said, it applies a lot of boost to stock turbos, like the V9, maybe it's a better for them to stay on V7.

Next time i log V7 with the same exact setup.

great post mate, very informative

I agree v7 is better all round, more responsive low down and log even looks better, even if it doesn't have the highest boost

[iqraceworks]

I did some logs a while ago when I was running the MHD tunes.....I found the same thing. The V7 maps have much more low end grunt than the V9 maps, and I really just seem to drive better. I never tried the V5 93 tunes, but the V5 E40 maps was awesome as far as low end (and high end) pull. The V9 ethanol maps didn't have nearly the low end power as the V5....but top end pull might have been just slightly more, but only after 5000rpms....so not a huge gain.

V7 93 tunes and V5 E40 still seems to be the best.

[HB E90]

Originally Posted by Quick335XI

https://datazap.me/u/terryeaton/log-...og=0&data=3-21

Hi does this log look ok?

Looks bad ass! 28 psi all the way to 7000 rpms! Have you run the 1/4 mi on that?

[studio54]

Originally Posted by iqraceworks

I did some logs a while ago when I was running the MHD tunes.....I found the same thing. The V7 maps have much more low end grunt than the V9 maps, and I really just seem to drive better. I never tried the V5 93 tunes, but the V5 E40 maps was awesome as far as low end (and high end) pull. The V9 ethanol maps didn't have nearly the low end power as the V5....but top end pull might have been just slightly more, but only after 5000rpms....so not a huge gain.

V7 93 tunes and V5 E40 still seems to be the best.

You say V7 93 seems to be the best, but you never tried the V5 tunes on 93, why this statement?

Anyway (on 91 for me), my guess is that you are maybe right, it depends what you mean by best. Maybe V7 is not faster, marginally slower, but better for turbos, better looking logs, better overral then

What i am trying to find out, is which is faster (i care about the low end feeling too which i like a lot).

Honnestly for now and from my testing, i don't know which feels better between V5 or V7 on 91oct. I may say V5 but I have to flash V7 again to get a fresh review and compare them in a short time of period, i will try to do this this week if weather is ok.

I just can say that from my last memories, V5 on 91 feels the same low end as V7 91 + the same high end as V9, so it feels great to drive and powerful overrall (despite the bad looking log of WGDC, boost vs target ...). I am just a bit too afraid/concerned that it asks a bit too much on stock turbos (V9 too anyway).

I will log V7 with same setup, and try to have same condition of IAT to determinate which seems faster from log.
My last log of V7 on 91 oct were slower than V5 or V9 (like 0.7 sec slower on the 100-200) but i did not had the same setup (i had gutted secondaries while now it's straight pipe, so supposed to flow better, can't remember if was running Forge DV or stock DVs, not ok to compare logs).

So my guess is that it could end up with similar 100-200 kph times or marginally slower, while applying less boost, and having a better looking log concerning boost/target, and WGDC.

See you later with the V7 log to confirm that !

[Quick335XI]

Originally Posted by HB E90

Looks bad ass! 28 psi all the way to 7000 rpms! Have you run the 1/4 mi on that?

Thanks, not yet prolly in the fall

[Quick335XI]

Originally Posted by HB E90

Looks bad ass! 28 psi all the way to 7000 rpms! Have you run the 1/4 mi on that?

Yea the only issue at this point is the retardation due to false knock... Kainoy because of the closed deck block and heads as I understand it. Not much w can do ab8ut that though

[Vivek.]

https://datazap.me/u/vivek/lean-cond...og=0&data=3-21

https://datazap.me/u/vivek/lean-cond...og=0&data=3-21

Do these look okay?

[bimmerguy1210]

Originally Posted by Vivek.

https://datazap.me/u/vivek/lean-cond...og=0&data=3-21

https://datazap.me/u/vivek/lean-cond...og=0&data=3-21

Do these look okay?

Appears that you have a boost leak. Actual boost is way under target. You also have some timing corrections across 4 cylinders. This could be related to crappy fuel or spark plugs. Your fuel trims are also a bit higher than I'd like to see, especially since your not hitting full target boost. Do you have index 12 injectors?

[Vivek.]

Originally Posted by bimmerguy1210

Appears that you have a boost leak. Actual boost is way under target. You also have some timing corrections across 4 cylinders. This could be related to crappy fuel or spark plugs. Your fuel trims are also a bit higher than I'd like to see, especially since your not hitting full target boost. Do you have index 12 injectors?

So the boost actual vs target is modified by this external controller I have. The tune is set to max boost but I can adjust it on the fly (have it turned way down in this log). I was mostly concerned about Lambda since I'd felt some bogging especially on 3-4 shift and I'd seen it go to 20+ but i didn't get a log of those. Could be a total fluke that'll never happen again.

Part of me thinks its because this car is set up to run way more boost and some ethanol (it's on flex fuel) and I turned it all the way to min boost and have been running straight 91oct that's reading at 8.6% ethanol currently. Injectors are not stock they're 950cc I believe.

[lightmanek]

Highest boost I ran so far at 27PSI, this was accidental as I filled with petrol after running E50 and forgot about re-flashing Boost target in Re-Flex (ignore boost target reported by MHD as it's doing nothing here).

https://datazap.me/u/lightmanek/e92-...og=0&data=2-21

Car starts to feel fast at that level of power, but I need more timing and more E to see what GTX3584RS really can do
Original engine and internals, apart from piston rings and bearings which were changed 2 years ago. Car now has over 214000 miles on the clock ... and never gets boring

[Kajun]

2008 BMW 335i E93, 110,344 miles, w/Auto, Stock turbos, stock exhaust, index 12 injectors, 93 oct, upgraded FMIC and DP's, Bosch plugs and coils less than 6 months, (Local BMW repair shop took my NGK 2 step up). Please let me know what going on here. Car is lagging on take off. Hard to log here i will drive out and get more if requested. Thanks for your time! and have a great day!


https://datazap.me/u/dgiroir/log-163...og=0&data=3-21

[Saif2018]

Originally Posted by Kajun

2008 BMW 335i E93, 110,344 miles, w/Auto, Stock turbos, stock exhaust, index 12 injectors, 93 oct, upgraded FMIC and DP's, Bosch plugs and coils less than 6 months, (Local BMW repair shop took my NGK 2 step up). Please let me know what going on here. Car is lagging on take off. Hard to log here i will drive out and get more if requested. Thanks for your time! and have a great day!


https://datazap.me/u/dgiroir/log-163...og=0&data=3-21

You likely have a boost leak, have you changed your vacumn lines?

Check your charge pipe, Intercooler connection, vacumn cannisters and connection points.

If everything checks out Do a smoke test

Step 2 colder plugs are not recommended for FBO stock turbo cars. OEM Bosch plugs should be good enough, at most 1 step colder plugs.

[Kajun]

Your correct, spark plugs were NGK Spark Plug 95770 ILZKBR7B8DG, and it was 1 step. My car ran so damn good with those plugs. I was trying to find some more and i guess they don't make those anymore, still looking. new vac lines and charge pipe o-ring. Did the smoke test found one leak, o-ring on the manifold pressure sensor was torn. Boost solenoids pass. Everything else checked out. At wot theres a loud whistle that i can find. I was also told my tial bov needs to be shimmed? I was like WTF, ok. Weather permitting we are going to an airfield tomorrow and get some logs. Thanks for taking the time to look! I'm going to do another smoke test tonight like you said. Maybe something came loose.

[Saif2018]

Originally Posted by Kajun

Your correct, spark plugs were NGK Spark Plug 95770 ILZKBR7B8DG, and it was 1 step. My car ran so damn good with those plugs. I was trying to find some more and i guess they don't make those anymore, still looking. new vac lines and charge pipe o-ring. Did the smoke test found one leak, o-ring on the manifold pressure sensor was torn. Boost solenoids pass. Everything else checked out. At wot theres a loud whistle that i can find. I was also told my tial bov needs to be shimmed? I was like WTF, ok. Weather permitting we are going to an airfield tomorrow and get some logs. Thanks for taking the time to look! I'm going to do another smoke test tonight like you said. Maybe something came loose.

good idea to check your charge pipe and BOV. Also if you have wastegate rattle that could also be adding to boost issue. Might be worth adjusting them manually but do a log and see if there is any improvement first.

If your FBO then even OEM Bosch Plugs and Eldor Coils should be good enough.