on average how much are LT's( 1/78in), Catted Ypipe(3 in) good for in the 1/4? i already have a borla catback with an open plate, 3.73 gears, predator tune, functional ram air(originally a sleek beak). Prior to the hood, LT's, and Ypipe i was running 13.3 at 106.7mph(@sea level). Now im at 6700 ft and going to track for the 1st time so im just curious what most avg gain on the track is. BTW its thru a 6 spd.

 

You might go slower at that elevation even if you add more than just the exhaust. The correction factor is huge at over a mile high.

If you ran 13.3 @ 106 at your current elevation then went to sea level with the same relative weather and temp/humidity your time will drop to 11.98 @ 118.

So expect it to go SLOWER It is hard to make a N/A set-up run fast at such a high elevation. Might wanna consider elevation supplement (Turbo, Blower, n20)

If you ran it again in a sea level track, would would prob gain ~1.5-2 tenth and a few mph.

 

well i expect to run slower i just dont want to be in the 14's lol. i know i should be able to pickup some once i get an actual dyno tune. you are also correct i may have to change my setup i was originally going to go all motor but if i decide to stay up here then i may go the FI route.

 

oh btw i just went to the site of the track im going to be running and its only at 4700 feet lol.