My tuning adventure of the car is reaching completion. The last major hurdle is to pick a new torque converter stall speed.
The TC I'm presently using is stalling at 2440 rpm, no nitrous, no boost. With the nitrous shot, it is stalling at 3900 rpm.
The boost rise curve is tightly tied to the rpm of the engine and the use of the nitrous shot I use to help spool the turbo.
I'm thinking that I need at least 4-8 psi boost at the launch to reach my goal of a 1.2x 60 foot.
The latest datalogs show that I'm reaching 130 kPa by 5200 rpm and 145 kPa by 5600-5700 rpm. 5700 rpm is the point of peak torque for the motor, determined by the fuel table.
Fuel delivery peaks at 5700 rpm.
I'm thinking that a launch stall speed of 5600-5900 rpm would get me to my target.
I'm also hoping for a shift rpm drop of 300-400 rpm, instead of the 1,000 rpm drops with the present TC. The large drop is having a lot to do with the tires blowing away on the shift.
The last target for the new TC is minimum slippage on the top end. 2-4 percent.
The TC I'm presently using is stalling at 2440 rpm, no nitrous, no boost. With the nitrous shot, it is stalling at 3900 rpm.
The boost rise curve is tightly tied to the rpm of the engine and the use of the nitrous shot I use to help spool the turbo.
I'm thinking that I need at least 4-8 psi boost at the launch to reach my goal of a 1.2x 60 foot.
The latest datalogs show that I'm reaching 130 kPa by 5200 rpm and 145 kPa by 5600-5700 rpm. 5700 rpm is the point of peak torque for the motor, determined by the fuel table.
Fuel delivery peaks at 5700 rpm.
I'm thinking that a launch stall speed of 5600-5900 rpm would get me to my target.
I'm also hoping for a shift rpm drop of 300-400 rpm, instead of the 1,000 rpm drops with the present TC. The large drop is having a lot to do with the tires blowing away on the shift.
The last target for the new TC is minimum slippage on the top end. 2-4 percent.