Mhd stage 2

misguided_will · 01-30-2021, 08:25 AM

Hi all

I hit 24.5 peak psi today when I had my car in sports plus, sport shift, and my pedalbox on race mode.

I did the same without my pedalbox on and it hit 23.8 psi.

Are these numbers too high for stage 2 on 93 octane with stock turbo?

If so what should I do?

Thx

Jnat · 01-30-2021, 08:30 AM

I would think so. Did you just flash?

Ifellapart · 01-30-2021, 10:55 AM

Quote:

Originally Posted by misguided_will

Hi all

I hit 24.5 peak psi today when I had my car in sports plus, sport shift, and my pedalbox on race mode.

I did the same without my pedalbox on and it hit 23.8 psi.

Are these numbers too high for stage 2 on 93 octane with stock turbo?

If so what should I do?

Thx

That seems crazy out of range. Most I've seen on stock turbo is like 20-21 and even that is pushing it and out of the efficiency zone.

Side note, I had to look up what a pedal box is. Such a weird thing to have...

weehe126 · 01-30-2021, 11:12 AM

Post a log, im guessing it's a spike on shifting.

Devil doc · 01-30-2021, 11:14 AM

My car does 15-16 psi with the ots maps, so I would definitely say it’s way out of range. I’ve never seen much more than 21 psi on custom tunes and a healthy amount of ethanol for the stock turbo

kriszty · 01-30-2021, 12:15 PM

i think 20 psi is the max for safety

G.Newt · 01-30-2021, 02:09 PM

21psi is probably the absolute most you want to run. BM3 Stage 2+ E30 maps target 19psi and only for mid-range.

dmanb2b · 01-30-2021, 03:01 PM

What does your PSI read at idle?

Wires · 01-30-2021, 07:32 PM

Seems really high, but it it does depend on a boat load of parameters. If it's cooler/humid, you need less boost to get the same power. Hotter / dry, more boost.

Some days when it's cool, I'm peaking at 17PSI on BM S2, when it's hotter, 21PSI.

kern417 · 02-01-2021, 02:12 PM

Quote:

Originally Posted by weehe126

Post a log, im guessing it's a spike on shifting.

Came to say this. If you're just using a peak recall feature on one of the gauges, it's not an accurate representation of what's happening at WOT.

T_H_O_M_A_S · 02-01-2021, 06:38 PM

https://datazap.me/u/thomas/mhd-ots-...og=0&data=3-20

the higher shift spikes because of rpm dropping when shifting and a spinning turbo
in the end you see the effect of throttle closure when you go off the pedal
and you need to log in dsc off to run your map unrestricted

01-30-2021, 08:25 AM	#1
misguided_will Second Lieutenant 57 Rep 299 Posts Drives: 2018 BMW 340i M Sport Join Date: Jan 2009 Location: Sydney iTrader: (0)	Mhd stage 2 - peak 24.5 psi too high? Hi all I hit 24.5 peak psi today when I had my car in sports plus, sport shift, and my pedalbox on race mode. I did the same without my pedalbox on and it hit 23.8 psi. Are these numbers too high for stage 2 on 93 octane with stock turbo? If so what should I do? Thx __________________ 2018 F30 BMW 340i M Sport Injen EVO intake, OEM 437m rims, Catted VRSF dp, Magnaflow catback, Activ8 piggyback, Pedalbox.
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01-30-2021, 08:30 AM	#2
Jnat DisplacementReplacement 409 Rep 1,101 Posts Drives: 2020 X3M Join Date: Sep 2012 Location: Jersey Shore iTrader: (0)	I would think so. Did you just flash? __________________ 2020 X3M /// MHD Tune Prior Bimmers 2017 240XI Hybrid / FBO / MHD E40 2015 235XI FBO / MHD E30 2009 335XI FBO / COBB / E30
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01-30-2021, 11:12 AM	#4
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Post a log, im guessing it's a spike on shifting.
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01-30-2021, 11:14 AM	#5
Devil doc Private First Class 51 Rep 164 Posts Drives: M240ix Join Date: May 2015 Location: Miami iTrader: (0)	My car does 15-16 psi with the ots maps, so I would definitely say it’s way out of range. I’ve never seen much more than 21 psi on custom tunes and a healthy amount of ethanol for the stock turbo
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01-30-2021, 12:15 PM	#6
kriszty Lieutenant 329 Rep 532 Posts Drives: B58 M240ix pureturbo800 dorch1 Join Date: May 2007 Location: Holland iTrader: (0)	i think 20 psi is the max for safety
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01-30-2021, 02:09 PM	#7
G.Newt Major 810 Rep 1,454 Posts Drives: CT4-V Blackwing 6MT Join Date: Feb 2017 Location: CO -> TX iTrader: (0)	21psi is probably the absolute most you want to run. BM3 Stage 2+ E30 maps target 19psi and only for mid-range. __________________ 2022 CT4-V Blackwing 6-speed SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 \| Dorch S2 \| VRSF DP \| MST intake \| AWE catback \| 335is clutch \| CSF heat exchanger \| RK Autowerks intake manifold \| Orange M Perf Brake Kit \| KW Street Comfort coilovers \| GTS taillights V2
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01-30-2021, 03:01 PM	#8
dmanb2b Banned 2125 Rep 3,368 Posts Drives: G07, F97, F30, E90, E46, E30 Join Date: Jul 2016 Location: NY iTrader: (5)	What does your PSI read at idle?
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01-30-2021, 07:32 PM	#9
Wires Brigadier General 1646 Rep 4,877 Posts Drives: 2016 340i xDrive Join Date: Apr 2008 Location: Calgary iTrader: (0)	Seems really high, but it it does depend on a boat load of parameters. If it's cooler/humid, you need less boost to get the same power. Hotter / dry, more boost. Some days when it's cool, I'm peaking at 17PSI on BM S2, when it's hotter, 21PSI.
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02-01-2021, 06:38 PM	#11
T_H_O_M_A_S Second Lieutenant 188 Rep 282 Posts Drives: M140i Join Date: Mar 2019 Location: Belgium iTrader: (0)	https://datazap.me/u/thomas/mhd-ots-...og=0&data=3-20 the higher shift spikes because of rpm dropping when shifting and a spinning turbo in the end you see the effect of throttle closure when you go off the pedal and you need to log in dsc off to run your map unrestricted __________________ M140i DP , OPF delete , MHD stg2 93oct , xhp stg3
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