Turbo442
15+ Year Contributor
- 67
- 1
- Oct 21, 2004
-
Portland,
Oregon
90 AWD 5 spd, 20G @ 17 psi, 2G pistons, 28X10X3 FMIC, SAFC, 2G MAS, 3000VR4 fuel pump re-wired, 550's, AFPR @ 37 psi, base timing at 5 deg BTDC, 92 octane fuel, outside air temperature 40 deg F. AFC hi settengs all +5
I could use a bit of advice to get me moving in the right direction.
Here are a few observations I have made.
1. The more fuel I add with the AFC the more knock I seem to get but my EGT's go down.
2. When I lean out the high end with the AFC I get less knock but my EGT's go up.
3. My 70 mph cruise EGT's are around 1350-1375 F
4. Do I need bigger injectors? I figure I would be ok at 17 psi but maybe not? If a 2G MAS evens out with 550's then maybe I really do need 660's?
5. Could my problem be related to the fact that my ECU is advancing the timing too much because of AFC settings? Do I need simply need 660s and an ECU modified to compenste for them?
6. Should I try to set the AFC to 0 correction for high end and use my AFPR to richen the car up to the correct AFR at WOT?
7. I have the following pocket logger, EGT, fuel pressure gauge, Cyberdyne, Boost/vac.
Remember...this is a 90 AWD and the O2's read lower than other 1G's. It may still be lean though. I try not to ever let the EGT's get over 1500F at WOT.
This was 3rd gear.
O2-R RPM KNCK INJP ---
0.35V 3875 0 9.47ms 39
0.86V 4125 0 11.01ms 48
0.84V 4125 0 12.03ms 53
0.84V 4438 0 14.34ms 67
0.84V 4469 0 16.38ms 78
0.84V 4563 0 16.64ms 81
0.84V 4656 0 16.64ms 82
0.82V 4875 0 16.64ms 86
0.82V 5156 4 16.64ms 91
0.82V 5313 4 16.64ms 94
0.82V 5375 8 17.41ms 99
0.80V 5719 13 17.66ms 107
0.80V 5844 18 17.92ms 111
0.80V 5875 18 17.92ms 112
0.80V 6156 18 17.92ms 117
0.80V 6188 17 17.92ms 118
0.80V 6313 17 17.66ms 119
0.78V 6469 17 17.66ms 122
0.78V 6688 17 16.90ms 120
0.78V 6531 17 16.13ms 112
0.78V 6813 17 16.38ms 119
0.78V 6844 16 2.05ms 14
0.78V 6688 9 1.79ms 12
0.82V 6438 0 2.05ms 14
0.20V 5938 0 2.05ms 12
0.06V 5656 0 1.02ms 6
0.47V 5344 0 8.96ms 51
0.02V 4500 0 11.78ms 56
0.84V 4781 0 13.57ms 69
0.84V 4719 0 15.87ms 80
0.84V 4875 0 16.90ms 88
I could use a bit of advice to get me moving in the right direction.
Here are a few observations I have made.
1. The more fuel I add with the AFC the more knock I seem to get but my EGT's go down.
2. When I lean out the high end with the AFC I get less knock but my EGT's go up.
3. My 70 mph cruise EGT's are around 1350-1375 F
4. Do I need bigger injectors? I figure I would be ok at 17 psi but maybe not? If a 2G MAS evens out with 550's then maybe I really do need 660's?
5. Could my problem be related to the fact that my ECU is advancing the timing too much because of AFC settings? Do I need simply need 660s and an ECU modified to compenste for them?
6. Should I try to set the AFC to 0 correction for high end and use my AFPR to richen the car up to the correct AFR at WOT?
7. I have the following pocket logger, EGT, fuel pressure gauge, Cyberdyne, Boost/vac.
Remember...this is a 90 AWD and the O2's read lower than other 1G's. It may still be lean though. I try not to ever let the EGT's get over 1500F at WOT.
This was 3rd gear.
O2-R RPM KNCK INJP ---
0.35V 3875 0 9.47ms 39
0.86V 4125 0 11.01ms 48
0.84V 4125 0 12.03ms 53
0.84V 4438 0 14.34ms 67
0.84V 4469 0 16.38ms 78
0.84V 4563 0 16.64ms 81
0.84V 4656 0 16.64ms 82
0.82V 4875 0 16.64ms 86
0.82V 5156 4 16.64ms 91
0.82V 5313 4 16.64ms 94
0.82V 5375 8 17.41ms 99
0.80V 5719 13 17.66ms 107
0.80V 5844 18 17.92ms 111
0.80V 5875 18 17.92ms 112
0.80V 6156 18 17.92ms 117
0.80V 6188 17 17.92ms 118
0.80V 6313 17 17.66ms 119
0.78V 6469 17 17.66ms 122
0.78V 6688 17 16.90ms 120
0.78V 6531 17 16.13ms 112
0.78V 6813 17 16.38ms 119
0.78V 6844 16 2.05ms 14
0.78V 6688 9 1.79ms 12
0.82V 6438 0 2.05ms 14
0.20V 5938 0 2.05ms 12
0.06V 5656 0 1.02ms 6
0.47V 5344 0 8.96ms 51
0.02V 4500 0 11.78ms 56
0.84V 4781 0 13.57ms 69
0.84V 4719 0 15.87ms 80
0.84V 4875 0 16.90ms 88
