[Engineering Explained] Porsche's New 911 Engine Is Absolutely Brilliant
#61
Sounds like the engineers did their job, the goal was lambda = 1, apparently they were already close to that goal with the 3.0tt. Seems like if you have no problem with the current 3.0tt motor then there's not much to dislike about this new one, even if my lizard brain finds going from symmetrical twin turbo to asymmetrical single turbo to be a strange packaging choice.
#62
Exactly!
You would really not expect the M60i to be as crazy strong as it is. These things f'n rock right of the line with no flat spots.
I've seen Draggy slips 3.37-3.4 seconds and that was on 91 octane and 6,000 DA bad air.
The tuners show baseline WHP a hair under 500 which is at least 600 at the flywheel and don't forget the 147 lb ft of torque from the hybrid that is brought online when called for by the onboard whiz bang box.
You would really not expect the M60i to be as crazy strong as it is. These things f'n rock right of the line with no flat spots.
I've seen Draggy slips 3.37-3.4 seconds and that was on 91 octane and 6,000 DA bad air.
The tuners show baseline WHP a hair under 500 which is at least 600 at the flywheel and don't forget the 147 lb ft of torque from the hybrid that is brought online when called for by the onboard whiz bang box.
Last edited by Hunky; 06-15-2024 at 03:50 PM.
#63
Instructor
And to say Jason is somehow biased because he’s monetizing his YouTube videos is the typical desperate grabbing at those proverbial straws. Hate to break it to you but very YouTuber is monetizing their content. It’s just the way the world works. So it’s not just irrelevant but a complete red herring.
If you don’t like Porsche’s foray into hybrid tech, that’s ok. But don’t use straw man arguments. It’s just a bad look.
If you don’t like Porsche’s foray into hybrid tech, that’s ok. But don’t use straw man arguments. It’s just a bad look.
#64
That was the most interesting part of the video for me, that the 3.0tt is basically at lambda = 1 like 99% of the time and I’m guessing that the 1% is only observed on the Ring with their pro test drivers. This whole powertrain package was seemingly designed around that 1% gap and then optimized to produce more performance wherever possible. I understand why Porsche did what they did but it seems unnecessary in the bigger picture and the complexity of the system is counterethical to the spirit of the 911 in my mind. On top of that, imagine what the powertrain department could have done if they were not constrained by the lambda mandate.
I doubt we have to imagine very long. There will be a TTS and it will be absurd. And maybe even a 2RS.
This engine has more torque, more hp, and vastly less turbo lag. It's basically an improved 911 Turbo rebadged as the GTS trim. Literally no one on a public road needs whatever that last 1% was. But fear not. Porsche will sell it to you for more money next year.
#65
Rennlist Member
but what I meant I have zero hesitation to pull the trigger and dealer said pretty soon
#66
#67
That was the most interesting part of the video for me, that the 3.0tt is basically at lambda = 1 like 99% of the time and I’m guessing that the 1% is only observed on the Ring with their pro test drivers. This whole powertrain package was seemingly designed around that 1% gap and then optimized to produce more performance wherever possible. I understand why Porsche did what they did but it seems unnecessary in the bigger picture and the complexity of the system is counterethical to the spirit of the 911 in my mind. On top of that, imagine what the powertrain department could have done if they were not constrained by the lambda mandate.
All engineering is a series of compromises, and I believe the primary goals at Porsche were to improve the performance (responsiveness rather than absolute HP) without a substantial increase in emissions. Assuming the powerplant proves reliable, it's a masterpiece IMO and I have no doubt it'll be incredible to drive. It's great to see a company focused not just on 0-60 times, or max HP, but rather on improving the car's dynamic engine response and thus driving pleasure.
#69
Emissions numbers have already been posted by Porsche, the GTS emits 251-239 g/km CO2 while the base (3.0TT) emits 244-230 g/km. So if you think the powertrain was designed primarily to reduce emissions (which is the whole point of Lamba=1) then clearly they have failed, as the emissions went up slightly. This platform's greatest achievement is NOT lower emissions, it's a massive reduction in turbo lag combined with electric assist off the line. Unless you consider turbo lag important to the ethos of the 911, then this seems like move in the right direction.
#70
Thr 992.2 GTS powerplant is absolutely an engineering marvel. Still don't like it.
Once it drops in the TTS more people will love it. Just the way the cookie crumbles.
Once it drops in the TTS more people will love it. Just the way the cookie crumbles.
The following 2 users liked this post by 911dude41:
AlexCeres (06-15-2024),
lovernanako (06-16-2024)
#71
There’s more than one type of automotive emission. CO2 is a greenhouse gas but Lambda = 1 is shown here to be primarily related to the air pollutants (carcinogens and such) NOx, HC, and CO (carbon monoxide). Also, it’s been stated elsewhere that the pending Euro regs on Lambda was a primary driver for the design of this powertrain.
#72
Jury is out. Probably a great engine but we don't know yet.
Last edited by elvisdoc; 06-15-2024 at 11:28 PM.
#73
#74
Burning Brakes
Given how governments continue to tighten emissions regs, ICE enthusiasts should be grateful car manufacturers like Porsche are going to extraordinary lengths to keep the ICE engine in the bay as the primary mover instead of being relegated to backup generator and improving engine performance while they’re at it.
The following 3 users liked this post by OliverK68:
#75
Given how governments continue to tighten emissions regs, ICE enthusiasts should be grateful car manufacturers like Porsche are going to extraordinary lengths to keep the ICE engine in the bay as the primary mover instead of being relegated to backup generator and improving engine performance while they’re at it.
The following users liked this post:
Tupper (06-17-2024)