Idle (Transition) Tuning

[Z16DNA]

Just in time for the weekend. Love it. Doesn't look like Ross was able to get '04 OS V3 done yet. I'll play with new stuff and see what helps. Actually I was at Sears Point last week and discovered if both cooling fans are running my idle W/O Air Cond is great. I could take sum of B4301, and B4302 and add to ? B4307?

[bink]

Just in time for the weekend. Love it. Doesn't look like Ross was able to get '04 OS V3 done yet. I'll play with new stuff and see what helps. Actually I was at Sears Point last week and discovered if both cooling fans are running my idle W/O Air Cond is great. I could take sum of B4301, and B4302 and add to ? B4307?

I could be wrong ..but... I think the B4302 is the sum of B4301 and the Second Fan. Seems to work this way on my Z06.

or B4302 - B4301 = 2nd Fan's Airflow compensation.

If I'm correct then you should add the B4302 value to B4307.

Cheers,
joel

[Z16DNA]

B4301 is Fan #1 IAC correction, B4302 is Fan #2 IAC correction. I agree with you, B4302 should be added to B4307 at ECT temp. Can't wait to try this.

[BowlingSS]

We need a good write-up on setting up and tuning with all the new PIDs.

Bill

[bink]

I've now tried many different values for {B4349} ETC Throttle Area Conversion. I've tried values from .0191 to .0330 ( Joe's value) .

All else left static, and B4308- Idle Airflow Parked = stock values ( changing only B4349), the scanned DESIAC_B values decrease as the B4349 value increase. So, fewer steps for the same amount of airflow - bigger steps I guess.

My car seems to run the best at B4349 = .0320.

With B4349 = .0320 the "DESIAC_B" g/sec lined up with my "IAC-Warmed Up Airflow in Gear" g/sec and "IAC- Final Airflow Sum" g/sec.

Cheers,
joel

[Black02SS]

Sent you a PM bink.

[jfpilla]

[quote="bink"]I've now tried many different values for {B4349} ETC Throttle Area Conversion. I've tried values from .0191 to .0330 ( Joe's value) .


Not any more, Joel. Since I had changed the cam, I thought I might do a little VE tuning. I did it up to 2800 rpms, today. I had to change the DAF values and found 320 ETC worked for me also. I need a 50 mile or so highway drive to be sure of the tune, but they seem to hold up well.

[bink]

Not any more, Joel. Since I had changed the cam, I thought I might do a little VE tuning. I did it up to 2800 rpms, today. I had to change the DAF values and found 320 ETC worked for me also. I need a 50 mile or so highway drive to be sure of the tune, but they seem to hold up well.

Joe, I drove about 150 miles this afternoon - Idle held up very well. I have a little decel surging just below 2000 RPM ....but otherwise an excellent tune.
My VE needs to be cleaned up also ( running MAFLESS now) - that may be contributing to the surging problem?

Finally! Cooler weather here.


Cheers,
joel

[jfpilla]

Not any more, Joel. Since I had changed the cam, I thought I might do a little VE tuning. I did it up to 2800 rpms, today. I had to change the DAF values and found 320 ETC worked for me also. I need a 50 mile or so highway drive to be sure of the tune, but they seem to hold up well.

Joe, I drove about 150 miles this afternoon - Idle held up very well. I have a little decel surging just below 2000 RPM ....but otherwise an excellent tune.
My VE needs to be cleaned up also ( running MAFLESS now) - that may be contributing to the surging problem?

Finally! Cooler weather here.


Cheers,
joel

Sorry, did not see the ? . VE tuning does help. It did for me but, I get a little surge at 1200 rpm's with the TC locked. I can get rid of it if I create some cruise. I don't want cruise. I suspect that your cam needs revs and will surge at some level, in gear. I should add that I run the MAF, so my trims adjust for not perfect VE's and IAT changes.
Joe

[bink]

Thanks Joe!


Update - SD Tune. 90 mm NW TB.

B4349 ETC set at .0320.

I reduced my AC Ramp In and Ramp Out values by 25%. I reduced AC TQ Loss and AC TQ Loss by IAT by 25%. This has corrected the Short Term Idle Airflow Trims from swinging -0.30 -> -.050. They now are slighty positive and aren't adversely effecting the Long Term Trim.

I'm going to go run some hills for BEN!

Cheers,
joel