M-engeneering power boost feedback Pros and Cons
Rennlist Member
Joined: Jul 2023
Posts: 859
Likes: 494
I believe it the valves open and close based on the driving mode you're in. I'm not a 100%, so I'll let someone that knows chime in.
Pro
Joined: Nov 2020
Posts: 702
Likes: 609
On PSE cars with M-eng tune, the valves open either by pressing the exhaust toggle or by going into sports/+ modes.
On non-PSE cars, you don’t have an exhaust toggle, but your dealer can easily activate the PSE toggle function via assigned button (this will actually make your non-PSE exhaust a little louder). If you choose not to do that, you can still have valves open by going into sports/+ modes (normal mode will close the valves).
On non-PSE cars, you don’t have an exhaust toggle, but your dealer can easily activate the PSE toggle function via assigned button (this will actually make your non-PSE exhaust a little louder). If you choose not to do that, you can still have valves open by going into sports/+ modes (normal mode will close the valves).
Rennlist Member
Joined: Aug 2010
Posts: 2,579
Likes: 2,970
From: Philly suburbs
I did it for these reasons:
#1 Eliminate the "farts" at sport mode (abhor the farts)
# 2 eliminating the Auto- on/off engine (also not a fan of the ***)
#3 eliminating the cold start (another unnecessary juvenile/rude aspect - is Porsche stacking their focus groups with 9 year old boys?)
#4 easy to install/uninstall
And got these for free:
Revving >300O RPM at stand
more power boost
On the cons, I personally did not get any shaking at lower RPM, don't care about warranty void very much, have had no data log issues and am fine with the occasional loss of traction - it's not the most friendly sideways driving car because the grip limits are pretty high but I very much enjoy the well controlled oversteer when the conditions warrant it...
Not familiar with the heating up the spark plugs / premature failure issue but will cross that bridge when/if necessary.
#1 Eliminate the "farts" at sport mode (abhor the farts)
# 2 eliminating the Auto- on/off engine (also not a fan of the ***)
#3 eliminating the cold start (another unnecessary juvenile/rude aspect - is Porsche stacking their focus groups with 9 year old boys?)
#4 easy to install/uninstall
And got these for free:
Revving >300O RPM at stand
more power boost
On the cons, I personally did not get any shaking at lower RPM, don't care about warranty void very much, have had no data log issues and am fine with the occasional loss of traction - it's not the most friendly sideways driving car because the grip limits are pretty high but I very much enjoy the well controlled oversteer when the conditions warrant it...
Not familiar with the heating up the spark plugs / premature failure issue but will cross that bridge when/if necessary.
3rd Gear
Joined: May 2026
Posts: 3
Likes: 0
2024 GTS following the installation of the M Tune Stage 1 93 octane tune.
I have noticed that the factory boost gauge is reading significantly lower than it did previously. While I was seeing between 19 and 20 PSI on the stock settings, the gauge is now showing a maximum of 8 PSI with the tune installed.
Could you please confirm if this is normal behavior for this specific tune?
I have noticed that the factory boost gauge is reading significantly lower than it did previously. While I was seeing between 19 and 20 PSI on the stock settings, the gauge is now showing a maximum of 8 PSI with the tune installed.
Could you please confirm if this is normal behavior for this specific tune?
Pro
Joined: Dec 2022
Posts: 686
Likes: 622
From: CA
You can control it with the Sport Chrono drive mode selector. I don’t have PSE either and I had M-Eng set NORMAL to stock valve operation, SPORT to fully open, and SPORT PLUS to fully open. They can’t program the valve in INDIVIDUAL so that operates like stock. There’s some drone from ~1750-2250 rpm with the valve fully open so I will have them blend the stock valve curve in for that range.
Rennlist Member
Joined: Oct 2012
Posts: 1,733
Likes: 1,970
From: Boston, MA
‘Guages’ on these cars (temp, boost) are merely digital interpolations of real-world values. M has the ability to log what the car is actually doing, so that’s where I’d focus. If it bothers you just ask M…
2024 GTS following the installation of the M Tune Stage 1 93 octane tune.
I have noticed that the factory boost gauge is reading significantly lower than it did previously. While I was seeing between 19 and 20 PSI on the stock settings, the gauge is now showing a maximum of 8 PSI with the tune installed.
Could you please confirm if this is normal behavior for this specific tune?
I have noticed that the factory boost gauge is reading significantly lower than it did previously. While I was seeing between 19 and 20 PSI on the stock settings, the gauge is now showing a maximum of 8 PSI with the tune installed.
Could you please confirm if this is normal behavior for this specific tune?
3rd Gear
Joined: May 2026
Posts: 3
Likes: 0
Thank you for your response. I have completed the data logging and confirmed with M Eng that they are seeing approximately 24 PSI with the tune.
I was just wondering if anyone else who has installed this tune has noticed similar results on the stock boost gauge?
I was just wondering if anyone else who has installed this tune has noticed similar results on the stock boost gauge?
Rennlist Member
Joined: Jun 2023
Posts: 350
Likes: 345
Zero reason to not tune these cars, in fact it's the only reason I even bothered to get a 992 Carrera over other comparable super cars like a mclaren 570s, GT, or Z06/ZR1. Anyone saying that these cars suffer from more power in the corners truly don't know how to drive.
ESMotors have pushed a stock engine and trans 992 S to 850whp with custom aftermarket turbos and race gas. And that was just on G25-660 turbos, there are plenty bigger turbos out there that could be used if there was enough demand to push the limits of this platform. Sadly there isn't though and instead we get people wanting to de-tune their cars instead
Also for the purposes of the thread, the M engineering stage 2 tune on S/GTS turbos pushes about 28-29psi peak pressure.
I've had my car flashed to stage 2 since I owned it and it's been over a year with no issues or any of the 'cons' listed for what it's worth also.
Also regarding tire traction, my car is a C2S and had no issues with traction on PS4S tires except very very brief slip on launches. But you have to actually run proper tire pressures and not what the manual tells you. 30psi cold. But zero traction issues outside of launches.
ESMotors have pushed a stock engine and trans 992 S to 850whp with custom aftermarket turbos and race gas. And that was just on G25-660 turbos, there are plenty bigger turbos out there that could be used if there was enough demand to push the limits of this platform. Sadly there isn't though and instead we get people wanting to de-tune their cars instead
Also for the purposes of the thread, the M engineering stage 2 tune on S/GTS turbos pushes about 28-29psi peak pressure.
I've had my car flashed to stage 2 since I owned it and it's been over a year with no issues or any of the 'cons' listed for what it's worth also.
Also regarding tire traction, my car is a C2S and had no issues with traction on PS4S tires except very very brief slip on launches. But you have to actually run proper tire pressures and not what the manual tells you. 30psi cold. But zero traction issues outside of launches.
Last edited by Mr.Gonz; May 17, 2026 at 09:09 PM.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
Rennlist Member
Joined: Jun 2011
Posts: 341
Likes: 161
From: MA
not an accurate gauge, kind of like the water temp that is consistently pegged at 194.
Pro
Joined: Jul 2013
Posts: 584
Likes: 105
In my experience, I have found that "too much" power is never quite enough. YMMV.
Rennlist Member
Joined: Feb 2023
Posts: 206
Likes: 232
From: Los Angeles County
Based on actual datalogging, I'm getting boost levels similar to @Mr.Gonz , 28-29 PSI. I also have a Carrera S w/ M-Eng Stage 2 93 octane map (w/Europipe 100 cell cats). The stock gauge maxed out at 17PSI (?) when it was stock and still maxes out at 17PSI or so
3rd Gear
Joined: May 2026
Posts: 3
Likes: 0
I understand that the boost gauge may have limitations, but I am seeing a significant discrepancy in the readings. Currently, I am getting 8 PSI with the tune installed, compared to 19 PSI without it.
While I recognize that the gauge could be inaccurate, my research and observations of others using this tune indicate that the boost reading should not fall below the stock levels.
While I recognize that the gauge could be inaccurate, my research and observations of others using this tune indicate that the boost reading should not fall below the stock levels.