M Engineering

The linear pedal feel of the 911 is something we also like very much, for that reason we do not touch it. If a user wishes to change pedal sensitivity we can do that with ProTuning. We don't do that very often because how good the car already is and is usually an odd-ball request.

-Charles@M

rr_gts

@M Engineering ?

CZS

Good to know and agree completely. Thanks for the info!

M Engineering

No, most stage 1 and stage 2 cars don't need plugs gapped down. Unless you are due for plugs, or have active misfires from spark blow-out, you are fine. This is usually only seen in cars with higher miles that haven't had their plugs serviced yet.

-Charles@M

RoughRider911

Throttle response will largely be the same, you’ll just have more power at your disposal.

jhenson29

This is what I’m doing. Running stage 2 on original plugs and will ask dealer to gap new plugs at 30k service. Probably around May this year.

M Engineering

The reason for the tight gapping we request is due to spark blowout, which is more common at higher power levels (big turbos for example) or plugs with old age and large gapping. Think of it like using your breath to blow out a candle. With more air positive manifold pressure (boost), spark can get blown out. With a tighter gap its harder to blow it out. When a spark blowout occurs you get misfires.


-Charles@M

M Engineering

Rain doesn't keep the Dakar away! We just finished up a Stage 1 93 calibration on this epic spec of a Carrera. Enjoy the photos. M-Tuner is available for all specs and years of 992.1 Carrera and Turbo.

-Charles@M

HappinessProcured

I'd be interested in making Normal mode a little less sluggish around town so I don't always need to pop it into sport. But I don't know why it's so miserably sluggish. If not throttle response, is it idle RPMs too low or ???

995

are you saying retune sorts out the injector issues ?

What is the actual issue? Porsche aren't saying much, and I am annoyed they only sourced one injector.

im just waiting on replacement injector to arrive from Germany, car still under warranty, its MY21 C2S.

craig66

I am sorry if this question has been asked in the last 95 pages

The M engineering tune on a base 992 allows one to max HP and to some degree Torque at about 4k to 5K RPM which I am assuming is why it makes the car so responsive is that you are getting close to max of both at regular driving RPM's. I guess my question related to the fact that since the engine will be putting out max HP and torque for most of the driving time does that not cause undue stress in an engine especially a base with smaller turbos.

Secondly It seems that there is also little reason then to visit RPM's of 7K because the gains that are achieved over say 5.5K are maginal

Is my thinking flawed ?

Thanks

AlterZgo

Your thinking is flawed with respect to the car putting out “max HP and torque” at regular driving RPMs. The car is putting out exactly the same level of HP as a stock car on partial throttle when you are in partial throttle, I.e. steady state cruising at 45 mph or 75 mph or whatever. The injector duty cycles are very low and you are getting well over 30 mpg at partial throttle steady state cruising in 7th gear or even in 6ht or 5th gear while going 40 mph. It is only putting out “max” HP and torque when you are completely flooring it. The tune does nothing to make your MPG worse and places zero additional stress on your engine or transmission or any other component on your car when you are just driving normally around town.

Also, most of us are not tracking our cars or doing top speed runs or half mile events where we are running our cars over 150 mph. We are occasionally flooring our cars a few seconds here and there. Any more and we would likely get arrested as it’s super easy to accelerate to 120 or even 150 mph. So even if your car is tuned, you are putting a minimal amt more wear on your car because you are simply not going to drive it like an ape. Of course if you are hooning it all the time you will burn through tires and put more wear on your turbos and cooling system and suspension and brakes etc. but even then these are Porsches and they can take the abuse really well as long as the car is well maintained and you are running a good tune from a reputable tuner.

Flat6Motorsports

The engine/mechanicals are identical across the Base/T and S/GTS. So the engine is certainly capable of handling more power. We've been running 750+HP on 991.2 and 992s for years without issue. The 9A2 EVO engines have all forged internals and the blocks are shared on the 992 Turbo / Turbo S (where Porsche bores out to get the 3.7L). To your point, the base turbos being smaller have a smaller efficiency zone, so they work very good in the mid-RPM range but run out of flow/efficiency up top due to their sizing. This is why if you swap turbos for the S/GTS or Pure you can get a lot more power above 5K RPM on these engines. The engine won't see more stress, just the turbos getting worked harder. A base with a software tune gets you pretty close to a stock GTS in terms of power which is a great spot for a lot of folks. If you want more, the biggest limitation is the turbo sizing.

Just my oversimplified thoughts on power/turbos since I've lived with every combination:
- Stock: Porsche makes a nice car that's very capable out of the box.
- Base Turbos w/ Tune: A nice place for folks who want to wake the car up with downloadable power - the simple or starter choice.
- S/GTS Turbos w/ Tune: A sweet spot for folks who want great power (close to 992 Turbo power) and retain low/mid range torque/responsiveness.
- Pure 800 Turbos w/ Tuning: For the folks who want power (close to 992 Turbo tuned power), want to be thrown back in their seat and be rewarded for taking the car to redline.

I have an appreciation for all of it, there isn't a wrong choice, just more a matter of preference. My T just arrived yesterday so I'll be going back through it all again in a manual car. I really, really enjoyed the Stage 4 set-up (Pure 800) where the car was making about 700HP. Incredible speed, aggressive sounds but kept the overall ethos of a 911, sort of the limits without making the car feel too powerful/unbalanced with the handling/brakes, etc. Again, just my perspective for what it's worth!

- Jon

mattchow

I'm hoping I dont fall out of love with how great the car is currently with the GTS turbos, because if i go to the Pure800 setup, then water meth is coming along for the ride, and then it becomes a forever car lol.

mcacs1

Thanks for your detailed answer, I always enjoy reading your posts and getting your well balanced insights. May I ask why Porsche keeps the tune so low? What running conditions should one avoid with say a Stage 1 tune on a base Carrera to avoid the stresses that the Porsche factory 'tune' means to minimize? My car sees outdoor temps from -20F to 95F, but I don't track it.