K&N Filter Tops

[Nova70]

I noticed a lot of people are running the K&N Air Filter tops on their truck. I've been reading about them a little bit and thought I would fill everyone in on the findings. The filter top is actually robbing horsepower from your engine, the losses are up to 30-50hp with the filter tops. What happens is the air entering the carb while using an extreme lid causes air flow disturbance over the air bleeds and this causes the carb not to work properly.

I have tested these twice, and the results were the same. You LOOSE 5 to 7 HP with the lid over a regular K & N filter with a steel top. I also found that the air turbine on a S F dyno will pick about 7 or 8 HP more than when you run the carb without it..I have heard the same thing from other dyno shops.

JOE SHERMAN RACING ENGINES

Quote above is from this link- http://speedtalk.com/forum/viewtopic.php?f=1&t=9032

YellowBullit forums has also discussed this and guys there have seen up to a 50hp loss on performance built engines.

Just thought everyone might like to know the info as most of us are horsepower junkies.

Anthony