Exactly, tractorpulling engines run 10:1 AFR and do use the diesel to cool down the pistons/turbine, but just look at how much smoke they produce and it'll be enough to prove how much bullsh!t has been posted here.

You didn't read the article either did you?



What you're talking about has absolutely nothing to do with the fucking design constraints of a diesel engine and everything to do with the fact that the processor speeds in the engine control modules on our vehicles are too slow to run the leaner air-fuel ratios without risking egt and in cylinder temps rising too quickly for the ECM to sense it before damage occurs.

Your tractor pull analogy shows how clueless you are.

Now that we're stepping away from 32-bit processors and starting to go to processors running 250 megahertz or more it's absolutely possible and there are plenty of people doing it.


Gasoline cars used to smoke too as they were tuned for more power. We were using narrow band sensor initially that could only be sampled 10 times per second and then on me 7 we now have a wideband sensor that can be sampled a hundred times per second and the newer ECM can check it a thousand times per second.

That means that you can run the leaner mixtures and not have to worry about needing to dump fuel for cooling reasons.

You're discussing limitations of the engine management system and not the engine and you're pretty smug about it for somebody who doesn't know what the fuck they're talking about, to somebody who has the tools, skills, and access to CNC machines to build an engine from scratch if I wanted to.

I didn't sit out for it to be a dick wagging contest at all, but when somebody says that an engine can't make Power without black smoke which is a symptom of incomplete combustion which means you sent fuel through the engine without even utilizing all of its energy, then ya I'm going to back it up.

Your statement is literally diesels can't make power without running so much fuel that they can't burn it all.

See how fucking stupid that sounds? Black smoke is hydrocarbons it is literally wasted energy it's not necessary at all.

It's a stupid as saying you can't fill your coffee cup up all the way unless coffee is overflowing and running down the sides.

Or saying that you can't eat enough to fill your stomach unless you're vomiting some of it back up.

If a diesel smoking under power it means that shitty engine design that inefficient, like the Chevy diesels in the 80s, or means that the tuner either lacks of the knowledge or hardware to provide enough sensor resolution to be able to confidently add only the amount of fuel that it needed without risking the EGTs going too high.

It means you are exceeding the maximum amount of air that the turbo can push into the engine and still continuing to add fuel.

And as the article states, the vehicles did actually fucking pick up more power while getting better fuel better fuel economy.

An engine is a heat pump it needs as much heat as it can get without melting components so if the result of adding more fuel is cooling down egts it means that you are wasting energy, the EGT is cooler because the fuel is not burning completely.

How can you possibly fucking say that a HEAT PUMP makes more power if you feed it less heat?

There's only one of us here that fires off emails to the CEO of Conti Rein Pentosin, and is immediately contacted by their head of engineering to improve the product the same day and it ain't you.

You're a know nothing know it all.

This makes me question if you have ever done any engine tuning?

I'm not saying that you never have or don't know anything about it.

That paragraph just makes it sound like a hot engine with with high IAT and high EGT would make more power than a operating temp engine with cool IAT and moderate EGT.

I know that a hotter gas expands more rapidly than its colder counterpart, and therefore would make more power on the power stroke. But as you say yourself "within limitations" and we can extend that limit with the excess fuel cooling the combustion chamber and EGT.

And if I'm totally of, then Fuck it.

Maybe a bit offtopic, but... I cant believe you are writing all of this text from a mobile phone, do you have some kind of toilet problem or what 
(original topic is long lost anyway)

I get stoich combustion, I'm just saying the way you phrased that paragraph made it sound like a hotter engine all the way around would make more power than a colder.

I use the cooling effect of the excess fuel to compensate for my shitty cooling setup
And for me it works.

ok, you read some Banks papers.
Good job, it is always good to read as much info as possible.
But...., do you have a lot of expirience with tuning big power diesel engines your self??
I can say i do.. and your posts are not always in touch with reality..