I noticed on my most recent DM log that I am getting spark retard, up to 5.9 degrees on occasion. It seems like it is in the lower RPM's mostly but every now and then up high. It seems like it is when I increase throttle only slightly. If I slightly increase throttle I get the most retard for a few frames but with a larger step the retard is either absent or very little. Would this be a tip in leanness or should I back the timing back a little. All my fueling tables and spark tables are still stock AYBN, only a few changes.

 

Do you get any hesitation under these conditions, or is the throttle response good?

Is your TPS loose?

John

 

With the blower you don't want or need to run much timing in cruise mode, and you want to ramp it out fairly quickly.
If you can cut an paste your timing and main VE table, might help.

 

0x0192 F1 Main Spark Advance

Deg. vs MAP & RPM
| 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190
---------------------------------------------------------------------------------------------------------------
600| 26.0 26.0 23.9 20.0 15.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 6.0 6.0 6.0 6.0 6.0
800| 26.0 26.0 23.9 20.0 15.8 12.0 9.8 9.8 9.8 9.8 9.8 9.8 6.0 6.0 6.0 6.0 6.0
1000| 17.9 27.1 25.0 25.0 16.5 12.0 10.9 9.8 9.8 9.8 9.8 9.8 6.0 6.0 6.0 6.0 6.0
1200| 17.9 28.1 26.0 26.0 19.0 14.1 10.9 9.8 9.8 9.8 9.8 9.8 6.0 6.0 6.0 6.0 6.0
1400| 21.8 32.0 28.1 27.1 21.8 19.0 10.9 9.8 9.8 9.8 9.8 9.8 6.0 6.0 6.0 6.0 6.0
1600| 26.0 34.8 29.9 28.1 25.0 20.0 13.0 10.9 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8
2000| 28.1 38.0 30.9 29.2 26.0 21.1 16.5 13.0 13.0 13.0 13.0 13.0 13.0 13.0 13.0 8.1
2400| 29.9 38.0 30.9 29.9 28.8 23.9 17.9 14.8 15.1 15.1 15.1 15.1 15.1 14.8 14.8 14.8 9.8
2800| 29.9 38.0 32.0 30.9 29.9 25.0 19.0 19.0 15.1 15.1 15.1 15.1 15.1 14.8 14.8 14.8 9.8
3200| 38.0 38.0 33.0 32.0 32.0 26.7 20.0 20.0 15.8 15.8 15.1 15.1 15.1 14.8 14.8 14.8 9.8
3600| 38.0 38.0 34.8 33.0 32.0 26.7 23.9 21.8 17.9 17.9 16.9 16.9 16.9 16.9 16.9 16.9 12.0
4000| 38.0 38.0 35.9 34.8 32.7 28.8 26.0 23.9 19.0 18.6 19.0 19.0 19.0 17.9 17.9 17.9 15.1
4400| 38.0 38.0 35.9 34.8 34.1 29.9 28.1 25.0 20.0 18.6 16.5 15.8 14.8 17.9 17.9 17.9 13.0
4800| 38.0 38.0 35.9 35.9 34.1 29.9 28.1 26.0 21.8 20.0 17.9 17.9 17.9 17.9 17.9 17.9 13.0


0x0284 F2 Base Coolant Advance Correction

Deg. C vs Deg. & Vac
| 40 30 20 10 0
---------------------------------------
-16| 8.08 8.08 4.92 -0.00 -0.00
-4| 8.08 8.08 -0.00 -0.00 -0.00
8| 8.08 8.08 -0.00 -0.00 -0.00
20| 8.08 8.08 -0.00 -0.00 -0.00
32| -0.00 -0.00 -0.00 -0.00 -0.00
44| -0.00 -0.00 -0.00 -0.00 -0.00
56| -0.00 -0.00 -0.00 -0.00 -0.00
68| -0.00 -0.00 -0.00 -0.00 -0.00
80| -0.00 -0.00 -0.00 -0.00 -0.00
92| -0.00 -0.00 -0.00 -0.00 -0.00
104| -0.00 -0.00 -0.00 -0.00 -2.11
116| -0.00 -0.00 -0.00 -0.00 -4.22
128| -0.00 -0.00 -0.00 -0.00 -4.22
140| -0.00 -0.00 -0.00 -0.00 -4.22
152| -0.00 -0.00 -0.00 -0.00 -4.22


0x02D2 F3 Spark Advance Adjustment vs ADMAT1K & Boost

Deg. vs Deg. C & kPa Boost
| 0.0 12.5 25.0 37.5 50.0 62.5 75.0 87.5 100.0
---------------------------------------------------------------
Cold| -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76
23.5| -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76
49.3| -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76
80.0| -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76
Hot| -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76 -1.76


0x02FF F4 EGR Spark Advance vs %EGR

Deg. vs %EGR
| 0.0 1.6 3.2 4.8 6.4 8.0 9.6 11.2 12.8 14.4 16.0 17.6 19.2 20.8 22.4 24.0 25.6
---------------------------------------------------------------------------------------------------------------
(Deg.)| -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00 -0.00


0x0311 F80 PE Contribution To Spark Advance - Deg. vs NTRPMX

Deg. | 0 1600 3200 4800 6400
---------------------------------------
(Deg.)| 0.00 2.11 2.11 2.11 2.11


0x0316 F46 Initial Spark Advance To Be Ramped Out vs Coolant Temp.

Deg. | -40 -16 8 32 56
---------------------------------------
(Deg.)| 16.88 8.09 8.09 2.11 0.00










0x0422 F29 Base Pulse VE vs RPM And MAP

% | 20 30 40 50 60 70 80 90 100
---------------------------------------------------------------
800| 34.8 34.8 34.8 35.9 36.7 37.9 39.8 41.8 43.8
1200| 35.9 35.9 36.7 37.9 38.7 39.8 41.8 43.0 43.8
1600| 35.9 35.9 37.9 38.7 39.8 41.8 43.8 43.8 44.9
2000| 35.9 37.9 37.9 38.7 40.6 43.0 43.8 43.8 44.9
2400| 36.7 38.7 39.8 40.6 43.0 44.9 45.7 46.9 47.7
2800| 36.7 38.7 40.6 43.0 43.8 45.7 47.7 48.8 50.0
3200| 36.7 38.7 40.6 43.8 45.7 47.7 50.0 50.0 52.0
3600| 37.9 39.8 41.8 44.9 46.9 48.8 50.8 52.0 52.7
4000| 38.7 39.8 43.0 45.7 47.7 50.0 52.0 52.7 54.7


0x0476 F29E Base Pulse VE vs RPM And MAP (Closed Throttle)

% | 20 30 40 50 60 70 80 90 100
---------------------------------------------------------------
600| 28.1 34.4 37.5 36.7 43.8 43.8 43.8 43.8 43.8
800| 31.2 34.4 37.5 36.7 43.8 43.8 43.8 43.8 43.8
1000| 34.4 37.5 37.5 36.7 43.8 43.8 43.8 43.8 43.8
1200| 34.4 37.5 43.8 46.9 43.8 43.8 43.8 43.8 43.8
1400| 34.4 37.5 37.5 36.7 43.8 43.8 43.8 43.8 43.8
1600| 34.4 37.5 37.5 36.7 43.8 43.8 43.8 43.8 43.8


0x04AD F30 Base Pulse VE vs RPM

% | 0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 5200 5600 6000 6400
---------------------------------------------------------------------------------------------------------------
(%)| 30.9 30.9 30.9 30.9 30.9 30.9 30.9 30.9 30.9 29.7 29.7 27.7 27.7 27.7 27.7 25.8 18.8

 

I haven't checked the tps yet, but I set it about a month ago.

 

[QUOTE]Originally posted by justme


Try this first and lemme know.
How much boost are you running?.

[B]0x0192 F1 Main Spark Advance

Deg. vs MAP & RPM
30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190
--------------------------------------------------------------------------

800 |
26. 26. 23. 20. 15. 9. 9. 9. 9. 9. 9. 9. 6. 6. 6. 6. 6.
1000|
17. 27. 25. 25. 16. 12. 10. 9. 9. 9. 9. 9. 6. 6. 6. 6. 6.
1200|
17. 26. 26. 26. 19. 14. 10. 9. 9. 9. 9. 9. 6. 6. 6. 6. 6.
1400|
10. 26. 26. 26. 21. 18. 10. 9. 9. 9. 9. 9. 6. 6. 6. 6. 6.
1600|
10. 28. 28. 28. 23. 18. 11. 10. 9. 9. 9. 9. 9. 9. 9. 9. 9.
2000|
10. 30. 30. 28. 24. 20. 16. 13. 11. 11. 11. 11. 11. 11. 11. 8.
2400|
10. 30. 30. 28. 24. 20. 16. 14. 13. 13. 13. 13. 13. 13. 13. 13. 9.
2800|
10. 30. 30. 30. 25. 23. 17. 17. 15. 15. 15. 15. 15. 14. 14. 14. 9.
3200|
10. 30. 30. 30. 30. 23. 18. 18. 15. 15. 15. 15. 15. 14. 14. 14. 9.
3600|
10. 30. 30. 30. 30. 23. 20. 21. 17. 17. 16. 16. 16. 16. 16. 16. 12.
4000|
20. 30. 30. 30. 30. 25. 23. 21. 17. 17. 16. 16. 15. 15. 15. 15. 15.
4400|
20. 30. 30. 30. 30. 26. 24. 22. 19. 17. 15. 15. 15. 15. 15. 15. 13.
4800|
20. 30. 30. 30. 30. 26. 24. 22. 19. 19. 15. 15. 15. 15. 15. 15. 13.

 

Thanks, I will give it a shot this evening. I am only getting about 9 pounds of boost right now. I would like to get more if I could get the intake air temps down. About 175* after cruising around for a while.

 

What injectors are you running?.

If you don't mind what BPC are you running and how'd you come up with your F30 values?.

With my effect 60 PPH injectors I wound up with a BPC of 80 and it took alot of dithering to get my F30 numbers is why I ask.

 

Yikes, are you running EGR?.
What kind of K/Pa do you run at say 65 MPH, ie at just cruise?.

Maybe time to think of doing some fuel cooling.

 

I got a BPC of 106 figuring it like this.
BPC=730.75 * (vol/rate)
Vol=VOl of one cylinder in liters---------->.834
Rate=Injector flow in gms/sec----------->5.7708
gms/sec=(lbs/hr / 3600)*453.6--------->5.7708
lb/hr=45.8
I am running 42 lb. FMS injectors but I had the fuel pressure set to 47 lbs with the old injectors so I left it there. That is how I got the 45.8lb/hr flow rate.

I am not running EGR and it is blocked off. Light criuising I am at about 41-44 KPA.
Also Grumpy, my F30 values are stock setting for that bin. The only things I have changed in the bin at all are BPC and fan on temps.