power loss k& n filter

my brother has just fitted a new k & n air filter to his vfr 800 vtec 2002,
He says he has aloss of power instead of a gain,
has anyone else experienced this, does the ecu unit take a few runs to adjust itself

Thanks

 

no power gain by changing the filter and i dont see how it would loss any either.
Better to remove the flapper and snorkle.

 

^^^^^
take a look for un connected vac like
good call tink.
I'm not done w/ my fist coffee yet.

 

could you please rell me what you mean by removing the flapper and snorkle
Thanks

 

Another possibility could be the filter is over oiled.....

 

I don't want to hijack this thread, I have a UNI aftermarket air filter, but I am getting a little bit of occasional popping when letting off the throttle in the 1/2 throttle range or above, which suggests unburned fuel being exhausted, then igniting when it exits the tailpipe, which suggests one of two things - it's running a little rich (wasting fuel, doing the engine no good), and/or the spark plugs are fouled (from the engine running rich) and not getting a clean spark for an efficient burn.

As y'all know, getting at the plugs is doable, but the front bank of cylinders and the plugs are a real bear to access. Several hours of my time to do the plugs or silly money at the shop.

My question, the easier fix to a running rich condition would be to get more air into the airbox, and I was curious whether cutting off the snorkel entirely (the base of the snorkel, where it attaches to the airbox, is a wider opening than the snorkel's nozzle) would serve to allow a larger volume of air into the airbox (where it passes through the oiled air filter before entering the velocity stacks of the carbs), and perhaps help my running rich issue somewhat, without having to adjust the carburetors? Is it possible the snorkel, while slowing down and limiting the airflow to the airbox, makes some positive benefit such as introducing significant turbulence to the air flowing into the airbox (is this a good thing in an internal combustion engine?), or it simply serves as an additional safeguard against debris entering the airbox?

Any thoughts you may have on the subject would be useful, thanks!

My '96 Honda VFR (v-4 engine) has a twin-entrance "snorkel" that feeds air into the airbox for carburetion.

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