[vince3]

No 1/4 track here and the 1/8 mile track is a nightmare for numerous reasons.

[vince3]

Negative 1000 da. I’m now thinking with a drag pack, off-road setup and ATI pulley, 7s might be realistic.

Might need a lightweight battery and pull the front seats too but if everything goes right I think it can happen. This is still on stock 245/40//20 runflats since my car is a LT1.

[bishopts]

What gear are you in when you start your run?

[vince3]

2nd. If I was better at shifting (I’m no lift shifting) and used rangers technique from corvetteforum it might also improve. That violent slamming causes a slight loss of momentum I think.

[bishopts]

You can see the shift from 2nd to 3rd in the graph, its definitely longer than 3rd to 4th but up right up is more complex than straight down is. I wouldn't think no lift shifting is going to cause more loss of momentum. The loss of momentum is from the fact that you have to shift the gear in general.
What rpm are you shifting at?

[vince3]

Originally Posted by bishopts

You can see the shift from 2nd to 3rd in the graph, its definitely longer than 3rd to 4th but up right up is more complex than straight down is. I wouldn't think no lift shifting is going to cause more loss of momentum. The loss of momentum is from the fact that you have to shift the gear in general.
What rpm are you shifting at?

6700-6800 rpm. Closer to 6800, most shifts. shifting before 6700 is .2-.3 slower for me.

[bishopts]

I think that's kinda of the sweet spot with the msd intake

[vince3]

That DA caused a decent amount of knock above 6400rpm. My cylinder airmass was 1.03 at peak and my MAF was hitting 54.7lb/min and 9070hz. You can see the knock below.

Engine RPM (SAE) 6,605 rpm
Misfire Current Cylinder #1 0
Misfire Current Cylinder #2 0
Misfire Current Cylinder #3 0
Misfire Current Cylinder #4 0
Misfire Current Cylinder #5 0
Misfire Current Cylinder #6 0
Misfire Current Cylinder #7 0
Misfire Current Cylinder #8 0
Idle Desired RPM 696 rpm
AC Clutch Engaged No
Vehicle Speed (SAE) 80 mph
Engine Oil Pressure 60.9 psi
Driven Wheel Speed 80 mph
Trans Current Gear 2
Fuel Tank Level 43.9 %
Alcohol Percent 73.3 %
Ethanol Fuel % (SAE) 75.3 %
WB EQ Ratio 1 (SAE) 0.90 λ
Equivalence Ratio Commanded (SAE) 0.868 λ
Fan 31.8 %
Fan Desired 31.0 %
Engine Oil Temp 198 °F
Trans Fluid Temp 109 °F
Engine Coolant Temp (SAE) 189 °F
Ambient Air Temp 49 °F
Intake Air Temp 54 °F
Intake Air Temp 2 64 °F
Intake Air Temp B1S3 (SAE) 32 °F
Manifold Air Temp 62 °F
Relative Humidity 33.7 %
Specific Humidity 8.6 %
Injector Tip Temp 157 °F
Catalyst Temp B1S1 (SAE) 1,492 °F
Catalyst Temp B2S1 (SAE) 1,494 °F
Intake Valve Temp 335 °F

Volumetric Efficiency (mg•K/kPa) 2,850
Cylinder Airmass 0.91 g
Pressure Ratio 0.98
Intake Manifold Absolute Pressure (SAE) 14.4 psi
Manifold Absolute Pressure - Hi-Res 14.4 psi
Mass Airflow Sensor 8,869 Hz
Mass Airflow (SAE) 53.60 lb/min
Volumetric Efficiency Airflow 53.15 lb/min
Dynamic Airflow 3,188.9 lb/h
Barometric Pressure 15.7 psi

Intake Cam Angle 11.0 °
Intake Cam Des Angle 8.6 °

Timing Advance (SAE) 25.0 °
Base Advance 16.4 °
IAT Advance 0.0 °
Cam Spark Advance 6.5 °
Flex Fuel Advance 5.0 °
Torque Mgt Advance 0.0 °
PE/COT Advance 0.0 °
Coolant Advance 0.0 °

Burst Knock Retard 0.0 °
Knock Learn Factor 0.00
Knock Retard 5.4 °

Fuel Trim Cell 8
Instantaneous Fuel Flow Estimate 351 lb/h
Advance Fuel Flow Estimate 341 lb/h
Injector Flow Rate 225.70 lb/h
Primary SOI 349.0 °
Primary EOI 148.3 °
Power Enrichment On
Short Term Fuel Trim Bank 1 (SAE) 0.0 %
Short Term Fuel Trim Bank 2 (SAE) 0.0 %
Long Term Fuel Trim Bank 1 (SAE) -2.3 %
Long Term Fuel Trim Bank 2 (SAE) -5.5 %
Injector Pulse Width Avg. Bank 1 5.0 ms
Injector Pulse Width Avg. Bank 2 5.0 ms
Fuel Rail Pressure (SAE) 2,353 psi
Desired Fuel Pressure 2,176 psi
Fuel Pressure (SAE) 62.7 psi
Fuel Pressure Requested 73 psi
High Pressure Fuel Pump Delivery Duration 89 °

O2 Voltage B1S1 (SAE) 0.895 V
O2 Voltage B2S1 (SAE) 0.910 V

Accelerator Pedal Position 99.6 %
Throttle Position 99.6 %
Throttle Position (SAE) 83.5 %

[bishopts]

Its kinda odd that bank 2 on average is pulling fuel twice as much as bank 1.
Also could your desired cam angle vs actual be why the knock retard is being triggered? Maybe slop in the cam gear?

[vince3]

Originally Posted by bishopts

Its kinda odd that bank 2 on average is pulling fuel twice as much as bank 1.
Also could your desired cam angle vs actual be why the knock retard is being triggered? Maybe slop in the cam gear?

Those are all things AI picked up on from my logs. I've seen others with the cam angle being similar and 2-4 degrees difference is normal. Chat,grok or claude said that the cam angle could mess with the timing or valve events leading to a incomplete combustion, but again others have similar 2-4 degrees difference in their logs.

Bank 2 is what i'm working on. Going to order a smoke tester to see if i have an intake or exhaust leak. AI mentioned that i could be transient fueling or a leak right before the o2 sensor.

My knowledge is limited, so i'm learning as i go.

[bishopts]

If it were leaking the numbers would be positive.
Positive = adding fuel
Negative = taking away fuel.
Inconsistent spark or leaking injector would be more likely. The numbers are still within spec but the fact that they aren't the same is what i noticed. A difference of 2.5 percent is going to be hard to find. I really doubt it will be something that just stands out.

[vince3]

I can't post the log on here, but when I'm driving and i give a little throttle, (tps going from 10 percent to say 20 percent) bank 2 stft goes to 27.3. Its weird that its almost always 27.3.

Engine RPM (SAE) 1,797 rpm
Misfire Current Cylinder #1 0
Misfire Current Cylinder #2 1
Misfire Current Cylinder #3 0
Misfire Current Cylinder #4 0
Misfire Current Cylinder #5 0
Misfire Current Cylinder #6 0
Misfire Current Cylinder #7 1
Misfire Current Cylinder #8 0
Idle Desired RPM 720 rpm
AC Clutch Engaged No
Vehicle Speed (SAE) 65 mph
Engine Oil Pressure 50.5 psi
Driven Wheel Speed 65 mph
Trans Current Gear 4
Fuel Tank Level 45.9 %
Alcohol Percent 73.7 %
Ethanol Fuel % (SAE) 73.3 %
WB EQ Ratio 1 (SAE) 1.01 λ
Equivalence Ratio Commanded (SAE) 1.000 λ
Fan 0.0 %
Fan Desired 0.0 %
Engine Oil Temp 97 °F
Trans Fluid Temp 63 °F
Engine Coolant Temp (SAE) 145 °F
Ambient Air Temp 52 °F
Intake Air Temp 54 °F
Intake Air Temp 2 61 °F
Intake Air Temp B1S3 (SAE) 32 °F
Manifold Air Temp 73 °F
Relative Humidity 37.6 %
Specific Humidity 8.6 %
Injector Tip Temp 81 °F
Catalyst Temp B1S1 (SAE) 1,445 °F
Catalyst Temp B2S1 (SAE) 1,360 °F
Intake Valve Temp 294 °F

Volumetric Efficiency (mg•K/kPa) 1,552
Cylinder Airmass 0.09 g
Pressure Ratio 0.24
Intake Manifold Absolute Pressure (SAE) 3.6 psi
Manifold Absolute Pressure - Hi-Res 3.7 psi
Mass Airflow Sensor 3,284 Hz
Mass Airflow (SAE) 3.24 lb/min
Volumetric Efficiency Airflow 2.16 lb/min
Dynamic Airflow 128.4 lb/h
Barometric Pressure 14.8 psi

Intake Cam Angle 13.3 °
Intake Cam Des Angle 17.6 °

Timing Advance (SAE) 18.0 °
Base Advance 33.3 °
IAT Advance 0.1 °
Cam Spark Advance 0.9 °
Flex Fuel Advance -3.0 °
Torque Mgt Advance 0.0 °
PE/COT Advance 0.0 °
Coolant Advance 0.0 °

Burst Knock Retard 0.0 °
Knock Learn Factor 0.00
Knock Retard 0.0 °

Fuel Trim Cell 15
Instantaneous Fuel Flow Estimate 12 lb/h
Advance Fuel Flow Estimate 27 lb/h
Injector Flow Rate 0.00 lb/h
Primary SOI 291.5 °
Primary EOI 279.5 °
Power Enrichment Off
Short Term Fuel Trim Bank 1 (SAE) 0.8 %
Short Term Fuel Trim Bank 2 (SAE) 27.3 %
Long Term Fuel Trim Bank 1 (SAE) -10.2 %
Long Term Fuel Trim Bank 2 (SAE) -10.9 %
Injector Pulse Width Avg. Bank 1 0.6 ms
Injector Pulse Width Avg. Bank 2 0.8 ms
Fuel Rail Pressure (SAE) 973 psi
Desired Fuel Pressure 1,211 psi
Fuel Pressure (SAE) 47.4 psi
Fuel Pressure Requested 46 psi
High Pressure Fuel Pump Delivery Duration 18 °

O2 Voltage B1S1 (SAE) 0.035 V
O2 Voltage B2S1 (SAE) 0.030 V

Accelerator Pedal Position 25.9 %
Throttle Position 9.4 %
Throttle Position (SAE) 26.3 %

[DeuceCam]

Vince3, did your 2022 LTI have the NLS feature from the factory? If so, do you mind sharing your car's build date?

[vince3]

Originally Posted by DeuceCam

Vince3, did your 2022 LTI have the NLS feature from the factory? If so, do you mind sharing your car's build date?

I'm not sure about the NLS feature/option. The build date is 3/22