Newbie needs help with tow vehicle
I don't own a travel trailer (yet), but first things first....a truck to pull it. I'm looking at getting a smaller trailer, maybe something in the Jayco Jay Feather line (GVWR about 5-5.5k). I liv...
Forum Discussion
Valve train and what drives them...comments below IMHO...
Gears are best, but they make more noise and tougher to design on OHC
Chains are easier to design on OHC, but they have an over shoot so
the tensioner has a double duty job. Too much tension and the lube
and drag becomes an delicate balancing design act
Synthetic belts were to save all of that, but they too have issues.
Advertised no to little stretch, lower mass/inertia, lighter, etc, etc...
Longevity issues and failure mode is catastrophic on an interference design
Turtle...betcha the Porsche 911's of old had a much longer chain...gave
up trying to help a buddy trying to save a few pennies...that thing
must have been over 10 feet long
That was also too small (narrow) and stretched and quickly if the
driver nailed it too often
Think these new engine designers has the chains just large enough
for their middle of the bell curve drivers. Those who nail it often
will stretch them...meaning that going from idle (~800 RPM) to over
3,000 in a couple of seconds places tremendous stress on that
chain...on these small sports car engines...that some times meant
to well over 5,000 RPMs in a couple seconds...
Gears are best, but they make more noise and tougher to design on OHC
Chains are easier to design on OHC, but they have an over shoot so
the tensioner has a double duty job. Too much tension and the lube
and drag becomes an delicate balancing design act
Synthetic belts were to save all of that, but they too have issues.
Advertised no to little stretch, lower mass/inertia, lighter, etc, etc...
Longevity issues and failure mode is catastrophic on an interference design
Turtle...betcha the Porsche 911's of old had a much longer chain...gave
up trying to help a buddy trying to save a few pennies...that thing
must have been over 10 feet long
That was also too small (narrow) and stretched and quickly if the
driver nailed it too often
Think these new engine designers has the chains just large enough
for their middle of the bell curve drivers. Those who nail it often
will stretch them...meaning that going from idle (~800 RPM) to over
3,000 in a couple of seconds places tremendous stress on that
chain...on these small sports car engines...that some times meant
to well over 5,000 RPMs in a couple seconds...
