what kind of race is it? drag racing? road course?

fuck a K&N on a "race car" run an open maf.

hell if the car is only running for a short period of time it's HIGHLY unlikely you'll suck anything through the intake.

K&N's are for daily drivers.

if it's a drag race type of thing, turn the boost up. high. like 18-20 lbs.

just make sure it's cooled down before you run and let it cool down after.

this all depends on what kind of longevity you are looking for, but that will make it very quick for a short period of time.

grab a non turbo fuel pressure regulator from a junkyard too to up the base fuel pressure. ( shouldn't be more than 5-10 bucks)