Below.
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----- Reply message -----
From: "Randall" <TR3driver@ca.rr.com>
To: <spook01@comcast.net>, <triumphs@autox.team.net>
Subject: [TR] K & N air filters
Date: Sat, May 19, 2012 17:25
> You should report them if you truly think they are
> engaging in false advertising.
No, I did NOT say that. What I said was that I believe, on the information
I have, that they let more dirt through than the average paper element
filter. +you certainly inferred at the least. What is an "average" paper
filter? I am still waiting for you to present ANY evidence to the contrary.
> You are obviously emotionally invested in your opinion on
> paper filters;
No more than you are in your opinion of K&N.
+depending on application, I use either. Some of my cars have no filter at all.
> My guess is that one might gain 2 HP on these cars with a k&n
> simply because the early filters have such little resistance.
Which is remarkably similar to what I said. But then how much do you lose
due to advanced piston ring wear?+advanced piston ring wear?
> Every little bit helps!
Depends on your goals. My goal is a reliable car I can drive every day for
a long time. If sacrificing 2hp buys me another 30,000 miles without
replacing the rings, I'm good with that. If it was a race car, I would feel
differently (and might well run K&N filters if I ran any filter at all).
But I would also be changing the rings every hundred miles or so.
> Did the engines need re building every 10,000 miles? Of course not.
Uhm, just how many miles have you driven a TR3 with those screen filters, in
a dusty environment?+my mg m type has no filter at all. Niether does the mg
pa. The engines lasted quite a while on the poor and unpaved roads of the
thirties. The little m type went over the alps and back in '33 with out
requiring an engine rebuild.I'm not sure the original silver ghost had a
filter!I particularly like the comment in the owner's manual
about "excessive" oil consumption being one gallon (Imperial presumably) per
thousand miles.+the jensen healey claimed a pint per four or six hundred. But
that was because lotus pawned the undeveloped engine off on them.
> So, we worry about trapping bits one third the size of the things rattling
around in the oil system?
Dunno about you, but I don't put in dirty oil, while the air is already
dirty. And oil filters do remove particles smaller than 15 microns, just at
a lower percentage. Since they get many, many passes at the oil, they don't
need to be as efficient to remove the dirt. In fact, the early TR3s used a
bypass oil filter and fed the mains with oil directly from the pump.
-- Randall
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