Stubble wrote: ↑Tue Mar 25, 2025 5:22 pm
bombsaway wrote: ↑Tue Mar 25, 2025 4:53 pm
Stubble wrote: ↑Tue Mar 25, 2025 4:18 pm
Denso, Bosch, Delphi etc, they have done incredible things with injection and timing, the amount of control these systems have to recognize and correct for knock, to use a map etc, it's amazing.
We are talking about a carbureted v12 designed in the 20's and built in the 40's.
You have to appreciate that what is possible now wasn't possible then and isn't possible on startup or with a cold engine.
You can't take the carburetor out and re jet while the engine is running. This is a limitation of carburetors.
Then there is
this engine. Look, it's a big slow bear and it will pop gas because it has time.
You're making assertions out of thin air, and appealing to your own expertise on the subject. Yet you made an obvious error w regards to the CO output as 1.5% , so there's no reason for me to trust, aside from the other questionable things I've seen from you (like all hard revisionists I think you're operating with an extremely high level of bias and motivated reasoning about this subject)
Here's what the AI pointed out about older designs compared to new ones, like the SR20 which was from around 2000
However, carbureted engines, particularly older designs like the M-17T, actually have some advantages when running extremely rich mixtures:
Simpler fuel delivery systems with fewer electronic safeguards to prevent excessive richness
Lower compression ratios (6:1 for the M-17T vs. 8-10:1 for modern engines) that can tolerate richer mixtures with less risk of detonation
Larger displacement per cylinder (3.91L per cylinder in the M-17T) providing more thermal mass and stability during combustion
Military design priorities that emphasized reliability in extreme conditions over fuel efficiency or emissions
Multi-Cylinder Advantage. With 12 cylinders, even if some cylinders misfire occasionally due to excessive richness, the engine can continue running. The probability of all cylinders simultaneously misfiring is extremely low. If we assume each cylinder has a 10% chance of misfire at very rich mixtures, the probability of complete engine failure is 0.10^12, which is effectively zero.
Yes, I'm aware of all of that Bombsaway, I'm also well aware of my bias.
Look, how much oxygen is in the cylinder, how much reactant is in the cylinder and how long do they have to cook. Compare that to the flame front.
How I could articulate to you my model in under 300 words, I don't know. Even this is oversimplified, but regardless, I've put pen to paper.
You don't understand and you don't want to understand, which is fine, but continuing masticating it is pointless.
Explain your exhaust system, or at least consider it on your own. The problem start in the combustion chamber, they don't end there.
Then you should show your work. The AI critique is this
Based on the information in the forum conversation, my assessment of Stubble's argument is that they're making complex technical claims about the M-17T engine without providing sufficient evidence to support their position.
Stubble appears to be arguing that the M-17T engine (a Soviet V12 tank engine from the 1930s-40s) couldn't function effectively in the scenario being discussed due to combustion dynamics and exhaust system limitations. However, I notice that:
1. Stubble initially claimed an upper CO output limit of 1.5%, which bombsaway challenged with references to scientific papers showing higher values.
2. Stubble is focused on theoretical limitations without addressing the documented historical performance of this specific engine, which according to the first document was a military engine designed for reliability in harsh conditions.
3. The technical arguments about flame fronts, oxygen/fuel ratios, and exhaust system design are presented as self-evident without specific calculations or references to support these claims.
4. Stubble dismisses bombsaway's points by suggesting they "don't understand and don't want to understand" rather than addressing the specific technical counterpoints raised about the engine's capability to run at richer fuel mixtures.
While Stubble may have automotive expertise, their dismissive tone and unwillingness to engage with specific counterpoints weakens their argument. A stronger response would include specific calculations, historical documentation about this engine's performance limits, or technical specifications about its exhaust system rather than simply asserting their position is correct without supporting evidence.