Ski Bum
15+ Year Contributor
- 231
- 3
- Nov 17, 2005
-
Citrus Heights,
California
I have just recently installed an e316g along with a FMIC. Prior to this I took care of the supporting mods: 650's, 255 FP, FPR, 2.5" exhaust (no cats), evo exhaust manifold. I also removed the lower honey combs from my stock MAF and backed the screw out flush.
I'm having a hard time getting a decent tune with my SAFC2. Originally I started off with my MBC set to 12psi. From what I read it is better to start low then work up once a decent tune is established. That just would not work for me becuase of boost creep. I would set the highs at around -15 up until 5k rpms when it would creep to 20psi then the setting had to jump to 0 or sop to keep from knocking. I decided since I have the proper supporting mods I would just set the boost at 18 from the get go and let it creep from there. This instantly gave me a TON more power before 5k rpms. It also smoothed out the whole power band much more than before because I no longer had the huge change in correction from -15 to 0 in 200 rpms. Now where I'm at is getting a smooth tune without knock (are'nt we all )
Here are my settings on the SAFC:
1k 2k 2.6k 3k 3.6k 4k 4.6k 5k 5.2k 5.8k 6k 7k
lo 0 -2 -4 -1 -5 -7 -7 -7 -7 -7 -7 -7
hi -18-18-18 -18 -18 -15 -14 -13 -12 -11 -10 -8
TH points: 15% 65%
My MBC is set to 18psi and at 5k rpms begins creeping and hits 21psi by 6.5k
My fuel trims are as follows:
FTRL 108-117% varying
FTRM 92.9% constant
FTRH 81.2% constant
Up to 5k rpms the power band is fairly smooth then at around 5k rpms I start to get knock. I tried setting the SAFC to 0 to richen things up and it knocks but sputters as well. Also around 6k rpms there is usually a fairly significant backfire with a plume of smoke.
What I cant seem to figure out is why I seem to get knock both when I lean things out and when it is rich. There are also times at part throttle, usually first gear where all the car will do is sputter/bog in what I think is and overly rich condition.
Heres a log, 3rd gear pull:
O2-R - MAFS - TPS - RPM - TIMA -KNCK -INJP -AIRT
0.88V 182.4Hz 12.5% 3156 35° 0 1.54ms 104.9°F
0.84V 415.1Hz 77.3% 2688 28° 0 6.91ms 104.9°F
0.86V 522.1Hz 100.0% 2875 27° 0 8.45ms 104.9°F
0.86V 691.9Hz 100.0% 3063 23° 0 11.52ms 104.0°F
0.88V 956.1Hz 100.0% 3313 17° 0 16.64ms 103.1°F
0.88V 981.2Hz 100.0% 3594 15° 2 16.13ms 102.2°F
0.88V 1107.0Hz 100.0% 3719 15° 1 16.38ms 101.3°F
0.88V 1214.0Hz 100.0% 4219 17° 0 16.90ms 101.3°F
0.88V 1371.2Hz 100.0% 4281 18° 0 17.66ms 100.4°F
0.88V 1409.0Hz 100.0% 4469 18° 7 17.92ms 100.4°F
0.88V 1541.1Hz 100.0% 4688 16° 10 19.20ms 99.5°F
0.86V 1503.3Hz 100.0% 4906 15° 13 18.18ms 99.5°F
0.86V 1572.5Hz 100.0% 5125 14° 12 18.69ms 98.6°F
0.86V 1604.0Hz 100.0% 5250 17° 13 13.82ms 98.6°F
0.86V 1604.0Hz 100.0% 5688 17° 12 17.92ms 98.6°F
0.84V 1585.1Hz 100.0% 5719 17° 11 17.15ms 98.6°F
0.84V 1604.0Hz 100.0% 6063 21° 23 16.90ms 97.7°F
0.08V 1604.0Hz 100.0% 6125 19° 42 16.38ms 97.7°F
0.84V 371.1Hz 12.5% 5344 17° 16 1.79ms 98.6°F
0.70V 232.7Hz 12.5% 4469 45° 0 1.79ms 99.5°F
I'm having a hard time getting a decent tune with my SAFC2. Originally I started off with my MBC set to 12psi. From what I read it is better to start low then work up once a decent tune is established. That just would not work for me becuase of boost creep. I would set the highs at around -15 up until 5k rpms when it would creep to 20psi then the setting had to jump to 0 or sop to keep from knocking. I decided since I have the proper supporting mods I would just set the boost at 18 from the get go and let it creep from there. This instantly gave me a TON more power before 5k rpms. It also smoothed out the whole power band much more than before because I no longer had the huge change in correction from -15 to 0 in 200 rpms. Now where I'm at is getting a smooth tune without knock (are'nt we all )
Here are my settings on the SAFC:
1k 2k 2.6k 3k 3.6k 4k 4.6k 5k 5.2k 5.8k 6k 7k
lo 0 -2 -4 -1 -5 -7 -7 -7 -7 -7 -7 -7
hi -18-18-18 -18 -18 -15 -14 -13 -12 -11 -10 -8
TH points: 15% 65%
My MBC is set to 18psi and at 5k rpms begins creeping and hits 21psi by 6.5k
My fuel trims are as follows:
FTRL 108-117% varying
FTRM 92.9% constant
FTRH 81.2% constant
Up to 5k rpms the power band is fairly smooth then at around 5k rpms I start to get knock. I tried setting the SAFC to 0 to richen things up and it knocks but sputters as well. Also around 6k rpms there is usually a fairly significant backfire with a plume of smoke.
What I cant seem to figure out is why I seem to get knock both when I lean things out and when it is rich. There are also times at part throttle, usually first gear where all the car will do is sputter/bog in what I think is and overly rich condition.
Heres a log, 3rd gear pull:
O2-R - MAFS - TPS - RPM - TIMA -KNCK -INJP -AIRT
0.88V 182.4Hz 12.5% 3156 35° 0 1.54ms 104.9°F
0.84V 415.1Hz 77.3% 2688 28° 0 6.91ms 104.9°F
0.86V 522.1Hz 100.0% 2875 27° 0 8.45ms 104.9°F
0.86V 691.9Hz 100.0% 3063 23° 0 11.52ms 104.0°F
0.88V 956.1Hz 100.0% 3313 17° 0 16.64ms 103.1°F
0.88V 981.2Hz 100.0% 3594 15° 2 16.13ms 102.2°F
0.88V 1107.0Hz 100.0% 3719 15° 1 16.38ms 101.3°F
0.88V 1214.0Hz 100.0% 4219 17° 0 16.90ms 101.3°F
0.88V 1371.2Hz 100.0% 4281 18° 0 17.66ms 100.4°F
0.88V 1409.0Hz 100.0% 4469 18° 7 17.92ms 100.4°F
0.88V 1541.1Hz 100.0% 4688 16° 10 19.20ms 99.5°F
0.86V 1503.3Hz 100.0% 4906 15° 13 18.18ms 99.5°F
0.86V 1572.5Hz 100.0% 5125 14° 12 18.69ms 98.6°F
0.86V 1604.0Hz 100.0% 5250 17° 13 13.82ms 98.6°F
0.86V 1604.0Hz 100.0% 5688 17° 12 17.92ms 98.6°F
0.84V 1585.1Hz 100.0% 5719 17° 11 17.15ms 98.6°F
0.84V 1604.0Hz 100.0% 6063 21° 23 16.90ms 97.7°F
0.08V 1604.0Hz 100.0% 6125 19° 42 16.38ms 97.7°F
0.84V 371.1Hz 12.5% 5344 17° 16 1.79ms 98.6°F
0.70V 232.7Hz 12.5% 4469 45° 0 1.79ms 99.5°F