Jay,
They are too expensive and have to have the gap built into the plug during
manufacture-so parts stockage would be a monster. Offsetting the high cost the
only real gains I know of are that they last longer-but who cared.... you had
to do a tune every 10,000 miles or so to change the points, condensor and
rotor-so why not change the plugs too? and they cut down some pinging-so what,
use higher octane gas and it only effected some cars. Also, the people that
held the patents thought they had a gold mine and made stupid claims of much
better gas mileage, better performance, etc. They over-hyped them and nobody
believed it and nobody was willing to pay $2.50 when a regular plug cost 50
cents-75 cents.
Jan
Jay_Laifman@countrywide.com wrote:
>
So, if these surface point plugs are so good, why are they not more common?
Or, are they as someone suggested basically the splitfires? Or, is it some
evil on the part of the spark plug companies to make sure we use plugs that
don't last long so we will buy more?
Jay
|