well i have been hearing things about k&n filters not making power lately & i just put my car on the dyno today, & before we get going with the story it was on a mustang dyno. & for those who don't know they read lower than a dynojet, so just pay attention to the losses & gains.
well i had my car dyno'd shortly after i got it & put down 206.8 rwhp & 242 rwtq. & i got it back on the dyno today for the heck of it, since my shop owed me a couple runs. well the only difference from the very first run when i got the car to todays run, is a k&n filter.
well the first run today i netted 200.2 rwhp @ 5250, & 233.4 rwtq @ 4250
i was like i lost 6 hp what the heck. so i went for another run without the filter
the second run netted me 208.4 rwhp @5250, & 246.1 rwtq @4250
i couldn't believe it, cause i've always heard about how they actually give you more hp. i actually lost 6.6 rwhp & 8.6 rwtq with just that filter & weather conditions were almost exactly the same, nearly the exact same temp (mid 40's) & humidity (bout 40%) so i know this is pretty dang close
oh btw--corrected numbers on my car were 220 rwhp & 261 rwtq & they guy from mustang dynos' that set up this dyno said to add 33% to get the flywheel hp. so that would put me at 296 hp & 327 tq corrected flywheel (low balling the flywheel by only doing 30% is still 286 hp & 319 tq) if i get flamed i can post dyno sheets too (if i can figure out how )
just thought you all would like to know about the loss in power. i already yanked that thing out
well i had my car dyno'd shortly after i got it & put down 206.8 rwhp & 242 rwtq. & i got it back on the dyno today for the heck of it, since my shop owed me a couple runs. well the only difference from the very first run when i got the car to todays run, is a k&n filter.
well the first run today i netted 200.2 rwhp @ 5250, & 233.4 rwtq @ 4250
i was like i lost 6 hp what the heck. so i went for another run without the filter
the second run netted me 208.4 rwhp @5250, & 246.1 rwtq @4250
i couldn't believe it, cause i've always heard about how they actually give you more hp. i actually lost 6.6 rwhp & 8.6 rwtq with just that filter & weather conditions were almost exactly the same, nearly the exact same temp (mid 40's) & humidity (bout 40%) so i know this is pretty dang close
oh btw--corrected numbers on my car were 220 rwhp & 261 rwtq & they guy from mustang dynos' that set up this dyno said to add 33% to get the flywheel hp. so that would put me at 296 hp & 327 tq corrected flywheel (low balling the flywheel by only doing 30% is still 286 hp & 319 tq) if i get flamed i can post dyno sheets too (if i can figure out how )
just thought you all would like to know about the loss in power. i already yanked that thing out