[torrque]

Originally Posted by Cuprani

Can someone please take a look at my log:
https://datazap.me/u/cuprani/mhd-sta...25-28-29-30-31

Running FBO at RON102.
I was hoping to have a little more power output, but I'm running a little low on boost I think. I've been on the dyno doing 395 whp and 595 NM. A have a brand new set of original BMW turbo's.

Outside air temperature was 3°C during this run.

For that temperature, 15 PSI boost I don't think it's low ? I noticed the DME adjusts max boost according to outside temp; i.e it needs less boost for same power when cold than when hot, and drops accordingly. I mean for around 0 Degrees Celsius it's around 5-6 PSI stock?

[torrque]

Originally Posted by RSL

Figured that was case, was curious if the rom was the same on both DMEs or not. When did the issue start? You've obviously been chasing it a bit. Any changes prior to it acting up?

Here are a few big shakes... You see a couple of times RPM drops from over 5000 to zero ? That is when the needle dropped to zero also, and a huge stutter/ shake resulted. There are a couple of smaller drops of RPM prior to that, you can see them, they are also stutters, but to a lesser degree. Now running with all new coil packs. It is an electric thing, I was also monitoring voltage, and it drops to under 12 V from 14.x when it happens....

https://datazap.me/u/mhainal/log-151...rk=635-628-631

Here's a video of the problem, see how bad it shakes, makes my hand move with the phone...

[Cuprani]

Originally Posted by torrque

For that temperature, 15 PSI boost I don't think it's low ? I noticed the DME adjusts max boost according to outside temp; i.e it needs less boost for same power when cold than when hot, and drops accordingly. I mean for around 0 Degrees Celsius it's around 5-6 PSI stock?

I mentioned WHP before, but I ment 395 engine HP.
But because of the cold weather boost figures of 15 PSI are normal with stage 2+ on RON102?
Does the rest look right as well?

[torrque]

Originally Posted by Cuprani

I mentioned WHP before, but I ment 395 engine HP.
But because of the cold weather boost figures of 15 PSI are normal with stage 2+ on RON102?
Does the rest look right as well?

I let other chime in also, but I don't see anything out of the ordinary compared to my runs, I have a big problem with shaking/stuttering, yours looks alright ?

[335e92tx]

Originally Posted by torrque

I just had this crazy idea; flash stage MHD stage 1 map, which will increase the load on the faulty components, and will fail quicker. Hopefully I get a code of some sort and take it from there. I would prefer it it wouldn't start, than having this intermittent problem. What do you think about this?

Based on my experience, s1 and s1+ maps generally don't push hardware enough to throw codes.. The maps taper boost a lot


S2 and up is where things get complicated.. And especially at full load in 4th gear and up

[guop]

Got a fresh log, can anybody offer some advice? I see my LPFP drops below 50 so will have to address that soon

https://datazap.me/u/joserod2395/jb4...f?log=0&data=1

[baturbo]

Should I be worried about overboost? Or anything else for the matter?

https://datazap.me/u/baturbo/e30-2?l...a=3-23&mark=16

[335e92tx]

Originally Posted by guop

Got a fresh log, can anybody offer some advice? I see my LPFP drops below 50 so will have to address that soon

https://datazap.me/u/joserod2395/jb4...f?log=0&data=1

JB4 logs are really somewhat unique. I suggest you try http://www.n54tech.com/forums/forumdisplay.php?f=3 That is really the forum for them.

Originally Posted by baturbo

Should I be worried about overboost? Or anything else for the matter?

https://datazap.me/u/baturbo/e30-2?l...a=3-23&mark=16

Yikes, 13.8 barometric pressure? I guess your over 1700 feet elevation?

Where are you at down under? I didnt think melbourne was much above sea level. That's strange.

Thats probably a factor in the overboost. But it doesnt appear to be closing the throttle bc of it.

That will cause your fuel curve to be a little less than ideal up high. As it stands your AFR is about right but the short term trims are pull fuel pretty high.

Your got a 31degree increase in IATs over about 8 seconds. Thats pretty high.

WGDCs arnt bad. Im under the impression some of this could be tuned out with a custom tune. They could get your IATs down and the trims closer thats for sure.

[baturbo]

Originally Posted by 335e92tx

Yikes, 13.8 barometric pressure? I guess your over 1700 feet elevation?

Thats probably a factor in the overboost. But it doesnt appear to be closing the throttle bc of it.

That will cause your fuel curve to be a little less than ideal up high. As it stands your AFR is about right but the short term trims are pull fuel pretty high.

Your got a 31degree increase in IATs over about 8 seconds. Thats pretty high.

WGDCs arnt bad. Im under the impression some of this could be tuned out with a custom tune. They could get your IATs down and the trims closer thats for sure.

Thanks for feedback. I was at about that elevation (near Gisborne). So overboost normal at that height? I did not get any codes.

BTW mhd stage 2+ e30 v8 with FMIC. Stock downpipes with OEM DP ticked in mhd.

Can you recommend a tuner?

[335e92tx]

Originally Posted by baturbo

Thanks for feedback. I was at about that elevation (near Gisborne). So overboost normal at that height? I did not get any codes.

BTW mhd stage 2+ e30 v8 with FMIC. Stock downpipes with OEM DP ticked in mhd.

Can you recommend a tuner?

Well, no that is still a little strange.

You got pm.

[ellekz]

https://datazap.me/u/ellekz/mhd-v71-stage-2-dsc

MHD v7.1 stage 2+
98 RON
1°C ambient temperature
xHP stage 3
Wagner Evo 1 Performance intercooler
catless downpipes
new NGK plugs @ 0.02"/0.5mm
new vacuum lines and boost solenoids
BMW Performance exhaust

I'm new to this so I based my conclusions on the "interpreting-mhd-datalogs.pdf":

Lots of timing corrections it seems. I'll try to replace all 6 ignition coils and maybe do the walnut blasting thing. Hopefully that'll fix it?

Max boost seemed to be less than 17psi, I was expecting close to 18psi though. Or is that only possible with 102 RON?

Other then that it looks okay, right?

[ayyy]

https://datazap.me/u/danwogan/2-14-1...data=3-5-13-23

08 E92 N54 335xi FBO MHD Stage 2+ 84k miles

Stock LPFP
Stock Coils
Unknown index injectors
Walnut blast at 70k
NGK 1-step colder plugs gapped to .022

Getting cold start misfires as well as multiple cylinder misfires on WOT. Tried to do a quick 3rd gear pull to force the misfire but misfire didn't occur. Ran out of road to get into high RPM in 3rd, but hopefully this is enough to get an idea.

I immediately notice crazy maxed out STFTs despite having decent AFRs and LPFP and HPFP keeping up well. Aside from that nothing jumps out at me that would be causing my misfires. Any help would be appreciated!

[335e92tx]

Originally Posted by ellekz

https://datazap.me/u/ellekz/mhd-v71-stage-2-dsc

MHD v7.1 stage 2+
98 RON
1°C ambient temperature
xHP stage 3
Wagner Evo 1 Performance intercooler
catless downpipes
new NGK plugs @ 0.02"/0.5mm
new vacuum lines and boost solenoids
BMW Performance exhaust

I'm new to this so I based my conclusions on the "interpreting-mhd-datalogs.pdf":

Lots of timing corrections it seems. I'll try to replace all 6 ignition coils and maybe do the walnut blasting thing. Hopefully that'll fix it?

Max boost seemed to be less than 17psi, I was expecting close to 18psi though. Or is that only possible with 102 RON?

Other then that it looks okay, right?

Coils wont fix indiv cyl retards. Just fuel. I guess thats the normal heat range plug - not one colder?

So its really close to load targets but right after the shift you do lose a good amount of timing. Can you try another fuel blend? So, 98 ron is 91 or 93?

Prob not gonna see that on an OTS map. 17 is pretty good. and your right near that target..

[335e92tx]

Originally Posted by ayyy

https://datazap.me/u/danwogan/2-14-1...data=3-5-13-23

08 E92 N54 335xi FBO MHD Stage 2+ 84k miles

Stock LPFP
Stock Coils
Unknown index injectors
Walnut blast at 70k
NGK 1-step colder plugs gapped to .022

Getting cold start misfires as well as multiple cylinder misfires on WOT. Tried to do a quick 3rd gear pull to force the misfire but misfire didn't occur. Ran out of road to get into high RPM in 3rd, but hopefully this is enough to get an idea.

I immediately notice crazy maxed out STFTs despite having decent AFRs and LPFP and HPFP keeping up well. Aside from that nothing jumps out at me that would be causing my misfires. Any help would be appreciated!

yeah, trims were real high at the low end of the RPM band. Not sure why that would be . its a little lean there and trying to fatten up. You didnt get much time after the shift so its kinda of hard to tell on retards.

Id try another log.

[Faredo]

can you guys have a look at my log, getting timing corrections after shifts.
https://datazap.me/u/massius/log-151...15-16-17-23-26
Also, how accurate is Virtual Dyno? When I plug this run in, im getting 332hp 325lbft (I edit out 2nd and 4th gear before import).

[ayyy]

Originally Posted by 335e92tx

yeah, trims were real high at the low end of the RPM band. Not sure why that would be . its a little lean there and trying to fatten up. You didnt get much time after the shift so its kinda of hard to tell on retards.

Id try another log.

Turns out my issue was loose spark plugs. I installed them last summer when the engine was still hot and torqued them to spec, but they must've loosened when the engine cooled. Combustion was apparently leaking through the seals and even fouled up a couple coils. Cleaned, reinstalled, and torqued properly this time and running 19 psi with zero misfires.

Still, I'm hitting 10.28 AFRs on both banks at WOT sometimes. Maybe it takes a while to relearn.

[335e92tx]

Originally Posted by ayyy

Turns out my issue was loose spark plugs. I installed them last summer when the engine was still hot and torqued them to spec, but they must've loosened when the engine cooled. Combustion was apparently leaking through the seals and even fouled up a couple coils. Cleaned, reinstalled, and torqued properly this time and running 19 psi with zero misfires.

Still, I'm hitting 10.28 AFRs on both banks at WOT sometimes. Maybe it takes a while to relearn.

Reset lambda adapts. Its probably pretty confused.

[335e92tx]

Originally Posted by Faredo

can you guys have a look at my log, getting timing corrections after shifts.
https://datazap.me/u/massius/log-151...15-16-17-23-26
Also, how accurate is Virtual Dyno? When I plug this run in, im getting 332hp 325lbft (I edit out 2nd and 4th gear before import).

That I have seen 4th gear is best to used for VD sims. You dont have to edit it out, just select the GEAR in the drop down for VD.

Well, you got some issues thats for sure. Pretty aggressive retards after the shift into 4th and its doing some MASSIVE throttle closures bc you're going over boost target. Each time you see the light blue line drop down from the max of 81.0 its trying to reduce boost bc you ran over.

It looks like it starts with going over load target and the DME just backing off real aggressive (more than Iv seen in the past)

I would start with trying another fuel. That doesnt look good. Then I would think about changing to the V7 map. It does less throttle closure and that might help identify whats going on more.

I also dont see short term trims being logged.

So, how long has this map been in use?

[Faredo]

Originally Posted by 335e92tx

That I have seen 4th gear is best to used for VD sims. You dont have to edit it out, just select the GEAR in the drop down for VD.

Well, you got some issues thats for sure. Pretty aggressive retards after the shift into 4th and its doing some MASSIVE throttle closures bc you're going over boost target. Each time you see the light blue line drop down from the max of 81.0 its trying to reduce boost bc you ran over.

It looks like it starts with going over load target and the DME just backing off real aggressive (more than Iv seen in the past)

I would start with trying another fuel. That doesnt look good. Then I would think about changing to the V7 map. It does less throttle closure and that might help identify whats going on more.

I also dont see short term trims being logged.

So, how long has this map been in use?

This was the first run ever on this map. I also reset all my lamda adaptations before the run. think this could have been an issue? Currently using 93 from shell. ill give the v7 a shot
Thanks for the read.

[335e92tx]

eh, shell 93 used to be good, your in ark so it shouldnt be oxygenated.

Sunoco around? Iv had good luck with it.
Hard to tell with out short term trims. Need to see what direction the AFR is going under load really.

If the v7 log looks as bizarre it will probably be best to get WEDGE involved.

[Faredo]

Originally Posted by 335e92tx

eh, shell 93 used to be good, your in ark so it shouldnt be oxygenated.

Sunoco around? Iv had good luck with it.
Hard to tell with out short term trims. Need to see what direction the AFR is going under load really.

If the v7 log looks as bizarre it will probably be best to get WEDGE involved.

Sunoco here only has 91. I haven't looked at the interface, but how would i enable short term trims?

[ayyy]

Originally Posted by 335e92tx

Reset lambda adapts. Its probably pretty confused.

Will do. Is it required to reflash my stage 2+ map when resetting the adaptions or can I just do that while keeping my current map?