Actual power gains from bolt on parts?

Tinman · 05-24-2008, 08:54 PM

I'm currently looking to build another FC for NASA PTE, this means getting the best bang for the points out of the 13B. For those not familiar with NASA's Performance Touring rules, here is a brief rundown. Each car is put into a class based on factory performance, N/A FCs are "E" class and turbo FCs are "D" class. Each modification "costs" points and with only 19 points to spend before being bumped up to PTD, each point must be well worth it. After suspension, brake, and tire points I only have 5 or so points left for engine performance.

So the question is which of the following modifications yield the most performance gains either by themselves or in combination with each other?

Air intake system utilizing fresh air from outside the engine bay, 1 point
Catalytic converter deletion, 1 point
Cat back exhaust, 2 points
Header, 2 points
Underdrive pulleys, 1 point

Any actual dyno numbers would be greatly appreciated.

05-24-2008, 08:54 PM	#1
Tinman Rotary Fan in Training Join Date: Feb 2008 Location: Central Ohio Posts: 36 Rep Power: 0	Actual power gains from bolt on parts? I'm currently looking to build another FC for NASA PTE, this means getting the best bang for the points out of the 13B. For those not familiar with NASA's Performance Touring rules, here is a brief rundown. Each car is put into a class based on factory performance, N/A FCs are "E" class and turbo FCs are "D" class. Each modification "costs" points and with only 19 points to spend before being bumped up to PTD, each point must be well worth it. After suspension, brake, and tire points I only have 5 or so points left for engine performance. So the question is which of the following modifications yield the most performance gains either by themselves or in combination with each other? Air intake system utilizing fresh air from outside the engine bay, 1 point Catalytic converter deletion, 1 point Cat back exhaust, 2 points Header, 2 points Underdrive pulleys, 1 point Any actual dyno numbers would be greatly appreciated.