Ecoscort - 98 Ford Escort ZX2 ecomodding thread

[pgfpro]

Originally Posted by BabyDiesel

Lookee what came in the mail today

Cool Deal!!!

[BabyDiesel]

Yes sir! I'm hoping that I can get the wideband installed this weekend, along with tuft testing and coastdown testing

[pgfpro]

Originally Posted by BabyDiesel

Yes sir! I'm hoping that I can get the wideband installed this weekend, along with tuft testing and coastdown testing

Sounds good. This will help answer some questions.

Are your lifters hydraulic or solid?

I'm getting ready to switch back to my 3 1/2 valve system on the Talon. This gives me about a 8% gain in FE when in lean burn. It might be something you could employ?

[BabyDiesel]

Originally Posted by pgfpro

Sounds good. This will help answer some questions.

Are your lifters hydraulic or solid?

I'm getting ready to switch back to my 3 1/2 valve system on the Talon. This gives me about a 8% gain in FE when in lean burn. It might be something you could employ?

Absolutely. I really don't think I have been in lean burn yet lol. Tygen1 told me that without the WB O2, I can't see if I am just killing power or in lean burn. Driving blind, just like before I got a ScanGauge! I know that I need to aim for 16.5:1 - 17:1 AFRs when in cruise for the best mpgs according to Ty.

It is raining today and supposed to continue for the whole weekend... so testing will be delayed until conditions improve.

My lifters are solid. Surprised me! I assumed roller.

...Explain how you are going down a 1/2 valve! I demand to know the secret to such wizardry!! When Ty sends me a spare intake cam, then I will be able to see how a true 12 valve setup works with our cars

Did you see this question I asked earlier?

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?

If this does not help the "engine-too-big" syndrome, then I am fresh out of ideas man

[pgfpro]

Originally Posted by BabyDiesel

Absolutely. I really don't think I have been in lean burn yet lol. Tygen1 told me that without the WB O2, I can't see if I am just killing power or in lean burn. Driving blind, just like before I got a ScanGauge! I know that I need to aim for 16.5:1 - 17:1 AFRs when in cruise for the best mpgs according to Ty.

It is raining today and supposed to continue for the whole weekend... so testing will be delayed until conditions improve.

My lifters are solid. Surprised me! I assumed roller.

...Explain how you are going down a 1/2 valve! I demand to know the secret to such wizardry!! When Ty sends me a spare intake cam, then I will be able to see how a true 12 valve setup works with our cars

Did you see this question I asked earlier?


If this does not help the "engine-too-big" syndrome, then I am fresh out of ideas man

On my Talon the lifters are hydraulic, so what I did is modify one of the intake lifters on each cylinder that lets it bleed off oil pressure. The intake valves now open much later and close much earlier and lift only about an 1/8 off the seat. This keeps fuel from puddling on the intake valve but still gives me enough swirl for good atomization.


The above pics I just took of my junk head with the first version lifter in stalled. On the new version the intake valve only opens around a 1/8". On my Honda I eliminated one of the intake and rocker on each cylinder lifters all together.

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?

I would think this would work but to be honest I'm not to up on the Atkinson Cycle???

[BabyDiesel]

I could sliced one lifter per cylinder in half...

I have the blessing/curse of not having a rocker arm setup. The cam spins and pushes down directly on the lifter and valve.

Think Prius engine when you see/hear Atkinson cycle. Here is a decent definition:

Atkinson uses slightly different timing for valve opening and closing events -- in particular, the intake valve stays open as the compression stroke begins. This difference results in increased fuel efficiency, but decreased peak power. It's common in hybrids because those are the most focused on efficiency, and the electric motors can compensate for the horsepower deficit.

[pgfpro]

Originally Posted by BabyDiesel

I could sliced one lifter per cylinder in half...

I have the blessing/curse of not having a rocker arm setup. The cam spins and pushes down directly on the lifter and valve.

Think Prius engine when you see/hear Atkinson cycle. Here is a decent definition:

Oh so you have to regrind the cam.

Atkinson uses slightly different timing for valve opening and closing events -- in particular, the intake valve stays open as the compression stroke begins. This difference results in increased fuel efficiency, but decreased peak power. It's common in hybrids because those are the most focused on efficiency, and the electric motors can compensate for the horsepower deficit.

I understand the concept just not to sure on the cam events etc.

[BabyDiesel]

Originally Posted by pgfpro

Oh so you have to regrind the cam.



I understand the concept just to sure on the cam events etc.

To do it rightish, yes. BUT! I can retard the intake cam and it will have a similar effect. I will lose torque and horsepower in the lower rpms and gain mechanical efficiency. Upper rpm power will be higher as this allows better breathing.

I need to post the simulations Hardline did for me at TeamZX2. They tell a remarkable story of what could be possible with a certain engine build.

[pgfpro]

Originally Posted by BabyDiesel

To do it rightish, yes. BUT! I can retard the intake cam and it will have a similar effect. I will lose torque and horsepower in the lower rpms and gain mechanical efficiency. Upper rpm power will be higher as this allows better breathing.

I need to post the simulations Hardline did for me at TeamZX2. They tell a remarkable story of what could be possible with a certain engine build.

Oh so you have to regrind the cam.

This part was about running a single intake valve system.

As far as the Atkinson Cycle I think it would be worth looking into?

Cam gears are cheap.

[pgfpro]

The more I think it about it the more I like this idea. This would work awesome with a turbo for mid-load lean burn. See here I go again back to turbo world.lol

On my Talon the turbo gives me a 11% increase at 1psi in combustion efficiency over N/A. The more boost I run in lean burn the more the efficiency goes up.

So with your build you could run it in N/A at light load with a Atkinson cycle and at mid load still keep it in lean burn, but you would gain back some extra torque?

Hmmmmm. Must Ponder this.......