Let me start by thanking Kirk for donating his Crossfire and trusting LET Motorsports with it.

We have a bone stock (K&N Filters) Crossfire that we are going to mod and hopefully get into the 11's at our track event on April 12th. This is very exciting and here are the details.

We spent most of the day with Kirk @ CPT (Chicago Performance Tuning) getting a baseline and deciding on the route we want to take with this car.

We did a baseline and this weekend will get a LET Heat Exchanger, Johnson Pump, and Phenolic Spacers installed. Once this is done, we will tune the car with our Stage II tune and put some miles on her. Once the 185mm pulleys arrive, we will install the pulley and dyno again before the track event. If more tuning is needed, we will tune the car again to ensure we extract every last HP.

We chose a dyno dynamics because they are known for being very consistent. As the graphs show, this car makes the same power over and over.

Here are the graphs.








Now, here is even better news. We removed the plastic intake tubes and the crossfire picked up 7whp! This finally proves that the intake tubes are the restriction on the crossfire.

Here is that graph.