chiromikey

Unless you're tapped into the intake to catch an accurate boost pressure I'm having a hard time believing 23.5...

jvakos

that was my first reaction..23.5 seems way high. my dashcommand app has a PID for measuring boost and its never read above 14psi.....it may not be configured correctly or something if others are getting 18psti. dashcommand also logs 0-60 times and i've recorded several 3.7 and 3.6 runs with it being stock so seems the performance is where it should be but the boost readings arent correct or something on my end...?

lapd1989

Actually the stock turbo can handle up to 29psi of boost. All that is control by the ECU. I'm good friend with DME Tuning. With Air filter and spark you can run safely 23.5psi. I have that running right now. With Down pipes you can boost up to 29 pounds. You will also need to Advance timing by 6 degrees. Each degree you will gain about 18-20hp and with 1 pound you will get about 27-35hp. If anything you guys can DM me for more info.

lapd1989

And that chart if for stock everything, if you change air filter and downpipe your air flow is way better and your turbo can make higher psi easily

gaspam

^ the chart/compressor map is for what that the compressor/turbine/housing can handle/produce given compressor/ turbine size and housing a/r..... doesnt matter what you do to ecu/ timing/ fuel/ spark...... only thing that can change the compressor map is by physically changing the compressor/turbine wheel/ turbo housing (i.e. turbo hardware changes)

saying changing ecu/ timing/ fuel/ spark will change compressor efficiency map is like saying saying it will also change the engine's piston size

lapd1989

while some go by chart and never get a chance to even test it out just only know by looking at the chart and stand by the chart and will say and stand by there chart. Lol. While other that actually done things and seen massive gains on there own build that they have spent money on will be told by a person who stand by there chart. Look Ima leave this right here. Good luck. And for your info. 23.5 is a good number on your chart lmfao. And that's all stock without anything done.

gaspam

the compressor map is from garret/honeywell, you know, the people that make our stock turbos.... its physics, not opinion... no, 23.5 psi (please tell me what pressure ratio = 23.5psi on our turbos since you are in the know ) is not a good number on the compressor efficiency map, its well outside the pressure ratio/ flow rate efficiency islands ..... meaning at 23.5 psi you would be spinning our stock turbo well beyond what it can do.... its like saying you can increase your engine's max RPM to 10,000 without changing the internal hardware

cant wait to see your results, especially when you turn up the boost to 29 psi that you previously said stock turbos can do

who needs a pureturbo/ gad kit running 25-27 psi when we can now do 29 psi on our stock turbos phew phew

cij911

OK bumping an old thread....Hopefully you guys can help me identify the issue.

So I have just started playing with my 100% stock 2014 e63s. I have been using Dragy and HPTuners MPV12 to begin gathering stock data and so far I am disappointed. (FWIW, my e63s has felt about the same as my highly modified e55.)

According to Dragy my 0-60 using RS (adjusted 1 ft) are ~3.6. Non adjusted 0-60 mph are ~3.8-4 seconds. Quarter mile are ~117 mph. Non- RS starts, just mashing the throttle is ~3.8 0-60 1 ft adjusted and ~4 - 4.10 non-adjusted. So my initial thoughts have always been, the launch is no where near as violent as it should be (with 500+ ft lbs of torque and all wheel drive) and the turbos just don't feel like they are hitting. Well the first few logs with the MPV12 seem to validate that and peak boost appears to be ~12.5 - 13.5 psi range, not the 14.5 to 18 psi I have read about.

So what are the things I should look at that could be causing my boost levels to be off?
1. Do people test for boost leaks on the e63 / e63s platform like they do on every other ? (maybe I have a small leak ??)
2. Does the ECU detect crappy gas (CA 91) and say "oh no you don't" and limits boost? If so, is an easy test to run race gas or do you need to reset ECU somehow?
3. Is there an easy way to log knock sum and determine if that could be the culprit?
4. Also I noticed my throttle position is ~ 80% max (when it should be 100%)
3. Has anyone validated the MAP and tune screw up (referenced in this thread)? Can the dealer verify if the car has a proper tune?
4. My car is still under extended warranty, should I just take into the dealer and say "my car is off and not hitting advertised boost" with the hopes of getting new parts ?
5. Any other suggestions? Thanks in advance

PeterUbers

Have you tried and overnight battery pull or just pull your ecu out, wait 30 minutes and reinstall?

cij911

No. I have no idea what that should do, unless you think the ECU is in some sort of limp mode. According to logging (HPTuners), the ECU is seeing 590 ft lbs tq and Calculated Engine Load is 99.2% (so I suspect the ECU is limiting boost).

PeterUbers

Ecu adapts to throttle load over time ... just give it a try it's a freebie and then you can check it off the list

5soko

14.5 Is max boost a E63S will see under certain conditions.
My car stock also was never able to hit 14.5PSI, doesnt always mean it isnt making the power but the boost by load system this car is tuned with, isnt requested more boost to hit the desired load requested.
I believe i was somewhere around 12-13PSI stock in spring time weather conditions.

Your dragy testing sounds on par where it sound be with the 1 ft rollout, our trans are very heavy limited, esp in 1st gear but also in 2nd gear aswell. Wish there was more tuners willing to play with removing some % of the tq reduction.

Yes, ecu adjusts many parameters when running different gas.
in the HP tuners, there is a + button on the top left, i am on vacation so im limited in my help, you can add parameters to your logging next time out, like knock retard for each cylinder and such, but as long as your logging ignition you will have a good idea of how your car is behaving.
Dealer wont help, you can log, ' wastegate duty cycle' this will tell you if you have a boost leak, and if your turbos are hitting boost how it should.. If the dutty cycle is maxed out during full boost then you have a leak somewhere.. When im back from vacation i will share here all the parameters i am logging with HPtuners.

HPtuners has many "throttle" parameters, all will show different %, so dont worry about that.

when i get back we can compare my stock logs with yours! Thats always a better way.

Ill send you a log when i get back to compare to my stock log aswell.. what gear are u using to log and what RPM are you starting from. I usualy always do 3rd gear of 4th.

cij911

Thanks! Unfortunately few on here are actually logging their setups and just going by seat of pants (which is fine for them). So anyone with data that is willing to compare is great (for me and the community).

Digging a bit deeper into my logs and times, I appear to be very close to the stock published numbers, with the exception of 1/4 mile time, which I believe to be more function on full weight and heavy tires. I have larger / heavier tires than stock and I am guessing this could be costing me quite a bit in the 1/4 mile. I am going to see if I can find someone that will allow me to run the standard tire setup and see the difference.

My next piece I will test is the UPD filter / spacer setup.

1MavRick

i gotta figure out a way to measure my boost. i installed the android screen and got the Torque app (with wifi OBD2 because the android wont search external BT sources). it's only showing like 4 psi. it did the same thing in my old 550i. i even took it to my mechanic to have them test it. normal.

funny thing...in my wife's M4.....it would read a consistent 18-19 psi. really not sure why i cant get it to work on MY cars....

Siegmann

Try to get the MAP sensor channel if you can find it.

cocobeex

are you using android or Apple ?

i am using OBD2 with Torque App as well in Android system.

Here is my screen shot and log

1MavRick

Android. And yeah...I get plenty of vacuum. But that’s not what I’m looking for. I need it to swing as hard to the other side. Hahahaha.

cocobeex

Are you saying your Boost / Vacuum gauge never swing from Vacuum to Boost ?

The gauge i circled in green, you can see there is a Red little arrow. That was the max boost it achieved in that run. around 19 psi
In that gauge I circled, Right side is Vacuum, left side is boost.

2012 merc amg

If your only getting 80 percent throttle that’s your issue. I can’t remember on the 212 if you can pull up throttle position on the command screen. On the 213 you can via dynamic select. My suggestion would be to bring it to the dealer and have them put it on the star diagnostic tool and see what your actually getting for maximum throttle position.

Jd888

Ebay spec OBD2 via Bluetooth on Android phone.

1MavRick

circling back to this...with the help from the research done by folks like @5soko , @brutus_tx , etc....i've realized that the reason the boost psi was reading so low is that i was only looking at it during a 1st gear pull. thanx to their data logs, we now know that boost is severely restricted in the 1st gear and more is allowed as the gears increase.

brutus_tx

Thanks for the props! I'm glad I was able to help.
I just went back through this thread from its inception and I shake my head at some of the responses. I think its safe to say we have a better understanding of these cars now then we did only a few years ago.

Torq63s

hi guys im new here,
have a question, i have a 2016 e63s tuned by dtk, downpipes cold air intakes on an e30 tune. I do a pull and get code p0108 high map circuit. I am wondering what is the max boost the map can see?

billvp218

1.5 bar

bbob81278@gmail

Just bought a hptuner. And have an e550 with downpipes and straight piped no restrictions and I'm only at 17.5 with a stage 2 eurocharged tune. Can you help me gain the 8psi???