One costly problem we've seen quite
a bit of is the use of cheap aftermarket oil filters.
Especially in Vanagons, this mistake can be deadly
to your engine. We recommend using Mann or Bosch oil
filters for Vanagons. Both these brands have a pressure
relief
valve that allows oil to bypass the filter in the event
that it
becomes clogged. Filters that
don't have this bypass valve can cause a loss of oil
pressure which can delay hydraulic lifters pumping
up and even cause serious engine troubles.
Your air-cooled engine’s
compression ratio can greatly affect it’s performance
and longevity, yet it is often overlooked during engine
rebuilds & custom
engine work. The compression ratio has to do with the
volume of space in the combustion chamber. Commonly,
this space is left too small (due to machined cylinder
heads)
and as a consequence the gas is compressed too early
and the engine
suffers from pre-ignition. This adds a lot of resistance
and heat to an air-cooled engine.
Air-cooled engines typically run better
now if the compression ratio is set
a bit lower than factory specifications due
to the lower octane, higher quality gas available.
This is best for a dependable engine for
many thousands of miles. For custom engine
applications, we can increase the compression
ratio to adapt to after market upgrades and
modifications. This delivers a high performance,
yet reliable engine.
Carburetors:
Another problem we often see with air-cooled
engines is
poorly tuned carburetors. As professionals,
we prefer
using and recommend Solex carburetors as
opposed to the more popular Weber carbs for
our air-cooled Porsche® engines. Solex
carbs allow for more precise adjustments,
enabling
fine-tuning
not offered by Webers. For our air-cooled
VW® engines, we recommend
Empi Kadron carburetors. Not only are they
less expensive than Webers, we find them
easier to tune and they
stay
tuned
longer.
Stay tuned, we are adding more tips regularly.