[Jakeitto]

2-3 gear pulls. What are possible reasons for the underboosting?https://datazap.me/u/ekajg/log-15835...og=0&data=3-21 https://datazap.me/u/ekajg/log-15835...og=0&data=3-21

[WedgePerformance]

Originally Posted by Jakeitto

2-3 gear pulls. What are possible reasons for the underboosting?https://datazap.me/u/ekajg/log-15835...og=0&data=3-21 https://datazap.me/u/ekajg/log-15835...og=0&data=3-21

You have a major boost leak.

[Hededyo]

looking to get some feedback, I tried a E30 mix today car feels ok but I might have to keep logging, please keep in mind I did the mix because of CA fuel so I tried to compensate with e85 thats why the v9 91 oct map

the first pull I did in 4th the LPFP crashed totally around 36 PSI,

https://datazap.me/u/hededyo/log-158...1&data=3-14-22

later on a 3rd gear pull and the LPFP looks great so I'm not sure if it was because of the remaining stuff in the tank or what

https://datazap.me/u/hededyo/log-158...=3-12-22-23-24

at least for me everything else looks so far ok, I might need to check the mean boost over target as well

[335e92tx]

Originally Posted by Jakeitto

2-3 gear pulls. What are possible reasons for the underboosting?https://datazap.me/u/ekajg/log-15835...og=0&data=3-21 https://datazap.me/u/ekajg/log-15835...og=0&data=3-21

Originally Posted by WedgePerformance

You have a major boost leak.

yep, what he said,

You're driving the whee out of the snails.

[thormessiah]

Same map but with 2 gallons of E85 to attempt to reduce knock

https://datazap.me/u/volfwaley/stage-uno-plus?log=0&data=5-6-7-8-9-10-20-24

Both of my fuel pumps don't seem to be doing to hot

[Jerain]

Originally Posted by thormessiah

Same map but with 2 gallons of E85 to attempt to reduce knock

https://datazap.me/u/volfwaley/stage...7-8-9-10-20-24

Both of my fuel pumps don't seem to be doing to hot

That looks way better, almost no corrections, but now with that E85 your lpfp is struggling, you should consider a new one if you plan to run it like this.

[MEN54]

question, with following mods, what MHD stage i should choose and how much power i will get ?

maintenance on car is up to date including, fuel injetcors index 12, coils and spark plugs and walnut.

Mods list:
1. 5 FMIC
2. Charge pipe,
3. Oil catch can
4. VRSF 3' high flow Catted DPs
5. MMP Inlets and Outlets



Thanks

[Jerain]

Originally Posted by MEN54

question, with following mods, what MHD stage i should choose and how much power i will get ?

maintenance on car is up to date including, fuel injetcors index 12, coils and spark plugs and walnut.

Mods list:
1. 5 FMIC
2. Charge pipe,
3. Oil catch can
4. VRSF 3' high flow Catted DPs
5. MMP Inlets and Outlets



Thanks

Stage 2+ will be the best option but no MHD OTS will work 100% bc of your inlets... When you do that you should get a custom tune from let's say Wedge...

[thormessiah]

Originally Posted by Jerain

That looks way better, almost no corrections, but now with that E85 your lpfp is struggling, you should consider a new one if you plan to run it like this.

I have a stage 2 from precision race works ready to be dropped in ! I’ll log some more as soon as I do

[Antetokounmpo]

Originally Posted by WedgePerformance

You have a major boost leak.

Is my spool normal or small leak?

https://datazap.me/u/heel-toe/log-15...=0&data=3-4-22

https://datazap.me/u/heel-toe/log-15...=0&data=3-4-20

[Paliator]

Here is my log. I'm on v7 st1+. This is a log I got pre 30ff. Next run was 30ff. https://datazap.me/u/paliator/pre-30...&data=3-22

[NoGuru]

Originally Posted by Paliator

Here is my log. I'm on v7 st1+. This is a log I got pre 30ff. Next run was 30ff. https://datazap.me/u/paliator/pre-30...og=0&data=3-22

You are having a lot of timing corrections. What fuel are you running?

Originally Posted by Antetokounmpo

Is my spool normal or small leak?

https://datazap.me/u/heel-toe/log-15...=0&data=3-4-22

https://datazap.me/u/heel-toe/log-15...=0&data=3-4-20

Spool is a little slow but boost looks good.

[Paliator]

Originally Posted by NoGuru

You are having a lot of timing corrections. What fuel are you running?

Spool is a little slow but boost looks good.

Wawa 93 octane

[Paliator]

Originally Posted by NoGuru

You are having a lot of timing corrections. What fuel are you running?

Spool is a little slow but boost looks good.

Here is my log soon after where I got a 30ff. All vacuum lines replaced with a vrsf charge pipe with hks bov. : https://datazap.me/u/paliator/30ff-log?log=0&data=3-22

[dpaul]

Originally Posted by 6ixInline

Today my car started to go limp mode while wot with the error 29DC Cylinder injection cutout. The fuel used is 100 Ron E10.

This is the first log where it happened
https://datazap.me/u/mihairece/log-1...og=0&data=3-22
second pull
https://datazap.me/u/mihairece/log-1...og=0&data=3-22

I see that both LPFP & HPFP go down at the same time but cannot figure out which one did go bad.

It's your HPFP - the low pressure pump didn't crash, it's just a little lower than you'd like

[lisabosken]

Hello, could you take a quick look and see how my logs are from a couple of back to back runs today? It is greatly appreciated, thank you!

This is Stage 2+ on 91 ACN (Ambient temp was about 70degF)

https://datazap.me/u/lisabosken/mhd-...og=0&data=4-19

https://datazap.me/u/lisabosken/mhd-...og=0&data=4-19

[F13.KENN]

Hey guys. Dont think my car has any issues with it (other than my o2s) but I did a log and wanted to see if any of yall could see anything that doesnt look right. I am getting an o2 sensor swapped code as well as a few other o2 sensors codes. The o2s are in the correct spot too. Stock downpipes.

https://datazap.me/u/schwarze92/v80-stage-1

[dpaul]

Originally Posted by SCHWARZ_E92

Hey guys. Dont think my car has any issues with it (other than my o2s) but I did a log and wanted to see if any of yall could see anything that doesnt look right. I am getting an o2 sensor swapped code as well as a few other o2 sensors codes. The o2s are in the correct spot too. Stock downpipes.

https://datazap.me/u/schwarze92/v80-stage-1

Fix your sensors. It is not possible to diagnose tuning issues without doing that.

FWIW, the log looks terrible with timing corrections on multiple cylinders and significant underboost by 1.5-3psi. I've never seen STFTs bounce up and down to the extent yours do. Slow and incomplete rebound of Bank 1 AFR at throttle liftoff suggests dead/dying bank 1 pre-cat sensor. That's probably consistent with the codes you allude to, although other explanations are possible.

I wouldn't drive this car, certainly not at full throttle.

Next time, provide the actual codes and list your mods. In addition, for future logs, don't bother with second gear. 2500-6500 rpm in third and hold through 4th as long as safety permits. Finally, upgrade to v9 maps.

But first, before anything else, address the O2 codes

[dpaul]

Originally Posted by lisabosken

Hello, could you take a quick look and see how my logs are from a couple of back to back runs today? It is greatly appreciated, thank you!

This is Stage 2+ on 91 ACN (Ambient temp was about 70degF)

https://datazap.me/u/lisabosken/mhd-...og=0&data=4-19

https://datazap.me/u/lisabosken/mhd-...og=0&data=4-19

Major problem is being way under target boost - you've most likely got a significant leak. Surprised you can't hear it.

[F13.KENN]

Originally Posted by dpaul

Fix your sensors. It is not possible to diagnose tuning issues without doing that.

FWIW, the log looks terrible with timing corrections on multiple cylinders and significant underboost by 1.5-3psi. I've never seen STFTs bounce up and down to the extent yours do. Slow and incomplete rebound of Bank 1 AFR at throttle liftoff suggests dead/dying bank 1 pre-cat sensor. That's probably consistent with the codes you allude to, although other explanations are possible.

I wouldn't drive this car, certainly not at full throttle.

Next time, provide the actual codes and list your mods. In addition, for future logs, don't bother with second gear. 2500-6500 rpm in third and hold through 4th as long as safety permits. Finally, upgrade to v9 maps.

But first, before anything else, address the O2 codes

[QUOTE=dpaul;25927410]
Alright! Thank you! Going to try to fix the sensors soon

[lisabosken]

Originally Posted by dpaul

Major problem is being way under target boost - you've most likely got a significant leak. Surprised you can't hear it.

I see what you're saying and I will look into that. Thank you!

But why isn't my WGDC going higher than 65% to compensate for the leak? Especially in the higher RPMs

[dpaul]

Originally Posted by lisabosken

I see what you're saying and I will look into that. Thank you!

But why isn't my WGDC going higher than 65% to compensate for the leak? Especially in the higher RPMs

For a low target of 15.5, 65% is high. However, there are other explanations for failure to make target, the second most common being a vacuum leak i.e. cracked hoses(s) bringing vacuum to the wastegate solenoids.

Your logging parameters are a little different from what I'm used to seeing - are you running an up-to-date version of MHD? For logging, might want to include wgdc base value, wgdc after PID. If you've run out of room, delete delete actual timing on all cylinders except #1.

Also notice significantly positive LTFT, probably related to the boost issue but you might want to reset adaptations.