cewrx7r1

iTrader: (2)

Settings 4, IGN vs WATER COOL; change the 60C retard of 15 to 5.

Mine seems to start and run better when cold with this. With this I was also able to remove more fuel for cold starting. I think Mazda had the retard to help warm up the CAT faster by initially running with a lot of retard and having more gas burn in the exhaust.

If you try this, please report your findings.

jeff48

Chuck

Mine were set as follows



65 C ------> 0 retard

50 C ------> 10

Just for a grin I gave it a shot at 60C---->5

Let you know if there is any discernable diff in the am.

CrispyRX7

iTrader: (139)

Chuck,
I'll give it a try.
Crispy

cewrx7r1

iTrader: (2)

All the ones I have seen are/were:
65C-0
60C-15

I think yours would equal 5 retard at 57.5 which is not much different than my suggestion.

jeff48

I would agree with the math because as best I can tell the slope defined a linear relationship.


I had changed mine from OEM earlier but I am always willing to fiddle with something...

I doubt I will see a discernable diff but I will let you know.

gfelber

Chuck,

This is a fantastic recommendation. Temps were nice and cool in the NW this morning (49 degrees F) and the car started much more easily than before with a smooth and consistent idle. I also have better idle recovery than before under decel.

Thanks again for the tip.

Gene

cewrx7r1

iTrader: (2)

As I stated that when I made this adjustment, I was able to remove a
lot of fuel from the cold start map. This morning I connected the DL
to my PFC, left the cold start fuel as was, and changed the retard
back to 15. After starting the engine cold, it was idling very badly.
Most likely to being now too lean. It's rpms were jumping around a
lot between P4,N3 and P5,N3. The recorded IGL for these two points
were: 1.5 and .8 degrees timing.

Reset the retard back to 5, restarted, and reloged. This time the
idling was smooth and stayed in P4,N4 with and IGL of 13.8.

Now I realize that this test might be worthless.

Here are my map values and what the DL recorded.
Test1: P4,N3: 12 degrees static, 1.5 degrees active, -10.5 variance
P5,N3: 15 degrees static, .8 degrees active, -14.2 variance
Test2: P4,N4: 23 degrees static, 13.8 degrees active, -9.2 variance

To redo this test , I need to put the same timing in all cells of the
area so that the only observed differences is what the PFC does to it.

That will be tomorrow morning.

In case some of you have not noticed, idle IGL/IGT will not match what is in the cells as Mazda is running some other idle logic.

There is a way to override this but then you will not have any ISC idle control or O2 idle control anymore. This is for those racers out there with large street ports.

cewrx7r1

iTrader: (2)

Today I verified that the SCREEN 4, IGN vs. WaterT Cool works.
I set all cells in (P1-5,N1-5) IGL to 12 and (P1-5,N1-5) IGT to 2.

With 60C set at 15 retard, I started the car.
It idled at (P4,N3) with -2IGL and -12IGL. If it was 100% accurate, it should have been -3IGL,-13IGT.

With 60C set at 5 retard, it idled at (P4,N3) with 7.7IGL and -2.3IGT.
If it was 100% accurate, it should have been 7IGL, -3IGT.

Matt Hey

Wow! This makes everything so much smoother. My sparkplugs are starting to get old and was thinking of changing them because of roughness before the car is warmed up but now the car is pretty smooth again especially on decelleration. It is also a lot less resistant to dieing when the rpms drop below idle. I still need to take out a ton of fuel (removed air pump + 4x850cc injectors) down low as soon as I get my WBO2 hooked up. The retard was retarded . Thanks Chuck! This thread needs a bump anyway!

APEXL8T

bunp