Ecoscort - 98 Ford Escort ZX2 ecomodding thread

[pgfpro]

Originally Posted by BabyDiesel

108 mpg!!!!

I have a solution: Cylinder deactivation. Drop my 2.0 I4 to a 1.0 I2. Go with it rocket man

Actually that is a solution.

[oldtamiyaphile]

Originally Posted by BabyDiesel

108 mpg!!!!

I have a solution: Cylinder deactivation. Drop my 2.0 I4 to a 1.0 I2. Go with it rocket man

I have a 0.9 I2 in my Fiat, it won't do 108mpg

[BabyDiesel]

Originally Posted by pgfpro

Actually that is a solution.

It's always a good feeling to come up with a solution

Originally Posted by oldtamiyaphile

I have a 0.9 I2 in my Fiat, it won't do 108mpg

LOL! It probably is not running 35:1 AFRs through a turboed engine with a car that has a Cd lower than basjoos's AeroCivic either

I have links to more discussion and some great info from TeamZX2.com

Can the PCM tolerate diminished airflow?- Discussion on a 12 valve conversion. Check out the awesome simulations (especially my BSFC numbers) done by Hardline on page 2!

So you want better fuel economy...- Fuel economy discussion with me getting laughed at and even cussed at!

[pgfpro]

Still working on your answer. lol

The 2.0 L engine size problem is that even at a needed 4 hp to 6 hp the 2.0L engine would have to be running in vacuum and could not utilize the turbos
FE efficiency at this very light load. On my car I have to overcome AWD drive train loss and with a Cd of .29 so the hp that is needed is around 10 hp @ 55 mph.

So in your case the turbo could help with extra power when needed if you choose to run a 3 valve setup.

[BabyDiesel]

Take your time buddy! There's no rush here in NC!

Interesting. So I would have an atmospheric turbo setup then, like was on the old 7.3 IDI diesel engines?

I know the 2 cylinder 1.0 idea changes everything.. Including turbo selection.

[pgfpro]

Originally Posted by BabyDiesel

Take your time buddy! There's no rush here in NC!

Interesting. So I would have an atmospheric turbo setup then, like was on the old 7.3 IDI diesel engines?

I know the 2 cylinder 1.0 idea changes everything.. Including turbo selection.

It would be a normal turbo setup that would only make boost at mid and high load. So for FE the setup would be a lean burn N/A app. The results would still be awesome though!!!

[BabyDiesel]

Originally Posted by pgfpro

It would be a normal turbo setup that would only make boost at mid and high load. So for FE the setup would be a lean burn N/A app. The results would still be awesome though!!!

Exciting news to hear!

Now would 35:1 AFRs still be possible, or should I aim for 20-25:1 since I won't haz boost at lower rpm?

If I were to use a turbo that made say 1-2 psi between 1400-2000 rpm and was wastegated at 5 psi max for the mid and upper rpm ranges, what would the possibilities be then? Would my drive (line?) pressure be too high above a certain rpm?

I was told that cylinder deactivation would not work on my car due to me not having a way to stop the intake valves from opening and closing, and it would hurt my BSFC is this truth???

[pgfpro]

Originally Posted by BabyDiesel

Exciting news to hear!

Now would 35:1 AFRs still be possible, or should I aim for 20-25:1 since I won't haz boost at lower rpm?

If I were to use a turbo that made say 1-2 psi between 1400-2000 rpm and was waste gated at 5 psi max for the mid and upper rpm ranges, what would the possibilities be then? Would my drive (line?) pressure be too high above a certain rpm?

I was told that cylinder deactivation would not work on my car due to me not having a way to stop the intake valves from opening and closing, and it would hurt my BSFC is this truth???

Now would 35:1 AFRs still be possible, or should I aim for 20-25:1 since I won't haz boost at lower rpm?

I would aim for 20 to 25:1 A/F.

If I were to use a turbo that made say 1-2 psi between 1400-2000 rpm and was waste gated at 5 psi max for the mid and upper rpm ranges, what would the possibilities be then? Would my drive (line?) pressure be too high above a certain rpm?

Nope 1 to 2 psi with the size engine you have won't work. You would have to extremely lean, above 40:1. Now this is based on the 4 to 6 hp needed.

I was told that cylinder deactivation would not work on my car due to me not having a way to stop the intake valves from opening and closing, and it would hurt my BSFC is this truth???

Sorry but its the truth. To make your engine cylinder deactivation would take a crazy amount of change.

Keep in mind the engine is just a air pump. So when you increase your air flow
you can only do so much with lean burn and higher IAT to keep from having to add extra fuel. This becomes even more of a issue because now you want a low HP output from the cars aero improvement.

[BabyDiesel]

Originally Posted by pgfpro

I would aim for 20 to 25:1 A/F.




Nope 1 to 2 psi with the size engine you have won't work. You would have to extremely lean, above 40:1. Now this is based on the 4 to 6 hp needed.


Sorry but its the truth. To make your engine cylinder deactivation would take a crazy amount of change.

Keep in mind the engine is just a air pump. So when you increase your air flow
you can only do so much with lean burn and higher IAT to keep from having to add extra fuel. This becomes even more of a issue because now you want a low HP output from the cars aero improvement.

I was afraid that cylinder deactivation would be a more involved process than just cutting off injectors. DOH!

Maybe I should take 2 cylinders out and be done with it

20:1-25:1 is well within the reach of tuning software. It looks like I'll be heading down that road eventually.

Hmmm, I'm trying to think of a way to decrease the amount of air that the engine will get in my usual rpm range. The only way I can think of is retarding the intake camshaft and creating an Atkinson Cycle. Thoughts?

[BabyDiesel]

Lookee what came in the mail today