Air box mod save $$$

[PowerDubs_imp]

For those considering modifying their air intake:

I did dynometer runs comparing various intake and exhaust configurations.
1) Stock everything
2) Unrestricted exhaust (Yoshimura full) with TSR air intake
3) Unrestricted exhaust with stock air intake (stock air filter)

While the air-fuel ratios changed, the HP curves for each of these configurations was exactly the same.

I am unwilling to compromise intake air filtration, but before you conclude that the stock air filter is holding the performance back, another member ran butt dynos comparing unrestricted air intake (no snorkel or air filter) to stock and could not detect a difference.

Hate to be the guy that necro-bumped an almost 3 year old post- but I was linked here from another thread.

Not to be a nay sayer- but what you state- af change with exact same power is not really possible. Now the power change +/- might be as minuscule as to fall within the normal variance between runs, especially depending on how the graph is scaled- but I would be more interested in seeing the fuel curve. My guess would be it went lean, and if retuned to give it back the fuel it wanted- would make more power.

Just random thoughts from a guy that has heavily modified countless vehicle engines in his life.

Dyno testing uncorking an engine without correcting the fueling is no test at all.