Some questions

[KielEire]

Hi all.
Just a few questions for you all.


Emissions: how is it calculated, what does it mean, how to make it better, and what would be average for a mid-line engine?

How are smoothness,loudness, and responsiveness calculated and factored to our engines?

How would you lower the emission output of an engine?

[USDMFTW]

triple post much?
Emissions is just a generic calculated number, and to lower emissions, use cats or low the amount of fuel the engine uses/increase effeciancy.

[Daffyflyer]

Yup, main influences on it are fuel system type, fuel mixture, use of cats, but lots of other things tie in too like piston type, compression ratio etc.

[Daffyflyer]

Smoothness is mainly based on engine configuration (I6 is the best there) but also on lots of other stuff, loudness is mostly about exhaust design, responsiveness is a lot about fuel system, throttle count, fuel and timing adjustment etc.

[Jakgoe]

Yes, please delete the other two posts.

Also, this: Engine Guide

Page 30 should have all the answers.

[Jakgoe]

What would be average for a mid-line engine?

Depends on the year. Any specific year in mind?

[KielEire]

Sorry I posted that from my phone, I was having some issues.
For the year, I was thinking like a modern, 2014 model. I'm just trying to see if my engines are up to par.

[USDMFTW]

Sorry I posted that from my phone, I was having some issues.
For the year, I was thinking like a modern, 2014 model. I'm just trying to see if my engines are up to par.

Just ss one and post it here.

[07CobaltGirl]

My response got deleted with the other post.

[Daffyflyer]

:cry: My response got deleted with the other post.

Oh, whoops, I didn't realize the other ones had replies when I nuked them. Sorry!

[KielEire]

I guess my question is what is the general emission rating to strive for? I know higher is better, but compared to say, a Mazda 3, VW Golf, BMW 228, or Subaru WRX, what would be an acceptable level?

[07CobaltGirl]

No worries. I made my reply to the other one while everyone else replied to this one. I guess I just picked the wrong one to reply on! haha

[Slim Jim]

I guess my question is what is the general emission rating to strive for? I know higher is better, but compared to say, a Mazda 3, VW Golf, BMW 228, or Subaru WRX, what would be an acceptable level?

Right now, there are no emissions ratings to strive for. In the absence of regulations, it can be pretty much anything. A lower number is better, though. You can't compare automation's emissions number with any real life numbers like % of CO or ppm of HC/NOx. The best you can do is re-create a real-life engine as best you can in Automation, then make your own engine with a better emissions number.

[KielEire]

My company has 3 lines of engines.
Emerald-Economy(I try to keep emissions at least 20%.)
Eire-Standard(I usually do not bother tweaking unless it is under 15%)
Gaelic-Performance(I don't even bother looking )


Is this a good baseline to stay with?

[OCAdam]

You sure that's emissions and not economy?

As for economy, I shoot for at least 15% with my 80 RON economy engines, and over 30% in the regular economy cars. As for emissions, I usually have around 300 to 400, IIRC.