I had a set of the four chrome K&N filters also. Sold those as well.
Like you said, it's been a while. B.D.(before documentation)
I got to the point that I was considering using sheet metal screws through the bottom plate to hold the filters in place. Didn't do it, decided to go another way with them and just sold them.
Both types were cumbersome to deal with if you needed a lot of access to the carbs. Often with Webers, there is a hot street jetting and then there is the "track jetting". You need easy access to the jetting and sometimes the throttle linkages.
The K&N's on my Webers right now are oiled and are not red. I just looked and it is K&N oil.
That's not an issue for me at all though. Just a point of interest.
It is a decision, difficult at times to make whether or not to run open stacks or not?
With Webers there is such a difference that the often the compromise is just to run screens.
That really isn't a noticeable difference to me. Screens on the Webers is a very reasonable compromise to me.
I never really thought about the reverse engineering issue, that's more for manufacturers vs. users, but I suppose that anyone with a mill, better with a cnc mill can make these out of billet and they all pretty much look the same?
It isn't exactly like I just read about this on the internet. Having said that though there are and have been a bunch of variations and I never had them all.
Risk is a decision every individual must make for themselves?
Mike do you wear your raincoat and galoshes when you drive? Ever have a Pantera heater hose go on you? Wear the insulated ones.
This way was simpler for me. These are K&N's and they are glued to the velocity stacks.
When I want to go on the track I just change the stacks to open with screens. See below v
These are oiled and they aren't red. Maybe a little pink if you look a certain way at them.
My cell phone camera didn't pick that up but it's not as sensitive to that as the Sony A1 is?
Oh, and yes, these filters are very noticeably restrictive compared to the screens.
The filters keep out dirt, not water though. The screens keep out squirrels, chipmunks and some larger animals that tried. No bats though. Not yet?
These filters are minimally in the way of servicing the carbs under any conditions. Just remove the velocity stacks which just entails removing the two nuts and clips.
I would also point out that SOME of these engineering decisions are dominated by aesthetics rather than function. Probably the trick is knowing which to let dictate the results?
