oztracktuning
April 8th, 2006, 12:05 PM
Just comparing some airflow data that i have - would be interested to see some more airflow data from other cars and if possible matching dyno sheets.
This is shown in hptuners or efilive as dyncylair which gives airflow in g/cylinder which when multiplied by (rpm/1000) and then multiplied by 60 gives g/s.
This value is determined by the VE table - varying with ECT and IAT. However at WOT if the car is in the healthy afr range should be comparable from car to car. If cars are similar in efficiency of engine and gearbox then the rwkw should match from car to car.
The value also varies with air pressure.
A stock auto LS1 with good exhaust and maf tune gave the following airflows.
This car is an auto and would be in the low 200rwkw area.
4000rpm 158g/s
4700rpm 206g/s
5400rpm 240g/s
6000rpm 252g/s
My car baby cam/heads -
4000rpm 206g/s 165rwkw unlocked/186rwkw locked
4700rpm 248g/s 220rwkw unlocked/223rwkw locked
5400rpm 295g/s 252rwkw unlocked/252rwkw locked
6000rpm 324g/s 255rwkw unlocked/263rwkw locked
This was at 103Kpa Baro, 27deg IAT
My AFRs were around 12.6:1 in the dyno run.
Twin Turbo M6 LS1
4000rpm 316g/s
4700rpm 387g/s
5400rpm 443g/s
6000rpm 490g/s was dyno'd previously at a bit under 400rwkw.
This was at 40 deg C IAT and 101.5 Baro
Max was 1.37g/cylinder
This is shown in hptuners or efilive as dyncylair which gives airflow in g/cylinder which when multiplied by (rpm/1000) and then multiplied by 60 gives g/s.
This value is determined by the VE table - varying with ECT and IAT. However at WOT if the car is in the healthy afr range should be comparable from car to car. If cars are similar in efficiency of engine and gearbox then the rwkw should match from car to car.
The value also varies with air pressure.
A stock auto LS1 with good exhaust and maf tune gave the following airflows.
This car is an auto and would be in the low 200rwkw area.
4000rpm 158g/s
4700rpm 206g/s
5400rpm 240g/s
6000rpm 252g/s
My car baby cam/heads -
4000rpm 206g/s 165rwkw unlocked/186rwkw locked
4700rpm 248g/s 220rwkw unlocked/223rwkw locked
5400rpm 295g/s 252rwkw unlocked/252rwkw locked
6000rpm 324g/s 255rwkw unlocked/263rwkw locked
This was at 103Kpa Baro, 27deg IAT
My AFRs were around 12.6:1 in the dyno run.
Twin Turbo M6 LS1
4000rpm 316g/s
4700rpm 387g/s
5400rpm 443g/s
6000rpm 490g/s was dyno'd previously at a bit under 400rwkw.
This was at 40 deg C IAT and 101.5 Baro
Max was 1.37g/cylinder