Originally Posted By: rrounds
Get one of these and know when to change out the air filter
http://filterminder.com/
I put one of these on all my engines
http://filterminder.com/products/visual-...mmet-mount.html
and here it is on my S2000(the air filter has over 75k miles on it now)
ROD
Originally Posted By: DriveHard
Man, using a correction factor calculator, if you wait until that gauge tells you to replace your filter, you will have lost about 7.5% peak horsepower from when the filter was clean!
Originally Posted By: mjoekingz28
THIS! I notice a drop in upper end hp (4000-6000 revolutions per minute) within 10,000 miles on my new air filters. It just kind of numbs it down and subsides the rush it once had- on the Cobalt Ecotec.....the truck is probably different but I cannot comment now on it.
But if you're not living youre life one quarter mile at a time, then leave it in until it tears as is what the consensus always seems to be in these AF threads.
I didn't notice any difference in acceleration at 5-8k RPM of my S2000, with old air filter after 55k miles and 11 years or new one. May be it I timed it I may see the different, but without timer 5.5s or 5.8s is about the same to me.