On Mon, 1 May 2017 14:47:14 -0400, "Mr. Luddite"
wrote:

Not really a motorcycle but the same sort of thing happened when I
rebuilt the "Vega" motor in my 75 Monza.
I got a distributor kit and another cam gear that changed the ignition
curve and cam timing, along with a little more compression, a little
overbore and a different carb made that a pretty fast Monza.
I am sure it would not have passed an emission inspection tho ;-)



I can understand how those modifications can make a big difference in
performance. Usually though, they are at the expense of something else.


In this case, other than a slightly bigger displacement it was mostly
at the cost of low RPM emissions. I didn't run it at low RPM that much
anyway ;-)
I was working midnights by then so sitting in traffic was not a
factor.

But the K&N claims have always bothered me. My truck has the 5.4L
engine and came with single exhaust. About 4 years ago I was bored and
I had a dual exhaust system put on it just for the hell of it.
The guy who did the work assured me that I'd get better performance and
fuel economy with the dual exhaust. Bull****. Didn't change a thing.
I then replaced the stock air filter with a K&N. Didn't change a thing.

Since then, I've replaced the dual exhaust with the original OEM single
(was getting tired of the "rumble"). I also tossed the K&N for a stock,
OEM replacement. Again, no noticeable difference in fuel economy or
performance.

Snake oil, methinks.


There is a lot of snake oil being sold out there. In the boat business
it seems to be their stock and trade. Yamalube? Really?