| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 63.1 | A little work now = a season of fun | DRUID::CHACE | winter's coming, so let's enjoy it! | Fri Jan 06 1989 18:56 | 62 |
| 63.2 | Oooops I forgot ---- Use Drygas | DRUID::CHACE | winter's coming, so let's enjoy it! | Fri Jan 06 1989 19:01 | 11 |
| 63.3 | thanks | FSHQA2::DBROSNIHAN | | Fri Jan 06 1989 19:12 | 10 |
| 63.4 | check-list | FSHQA2::DBROSNIHAN | | Mon Jan 09 1989 12:31 | 4 |
| 63.5 | There are shims between the fan pulley halves | DRUID::CHACE | winter's coming, so let's enjoy it! | Mon Jan 09 1989 12:58 | 13 |
| 63.6 | can anyone help? | KDCA03::CDCUP_GREENE | | Wed Jan 22 1997 10:35 | 12 |
| 63.7 | Main jet? | ZEKE::BENT | | Wed Jan 22 1997 11:33 | 19 |
| 63.8 | | KDCA03::CDCUP_GREENE | | Wed Jan 22 1997 13:42 | 12 |
| 63.9 | Belt TOOOOO short | ZEKE::BENT | | Wed Jan 22 1997 15:47 | 24 |
| 63.10 | a couple of quetions. | KDCA01::CDCUP_GREENE | | Tue Jan 28 1997 16:30 | 10 |
| I also had a question about doing a compression check
on my Pantera 500. Is there a certain pound pressure
it should be checked at or is there a certain amount
of pulls to roll the motor over. ?
I just want to check the compression to make sure everything
is o.k. Any help is greatly appreciated.
Thanks in advance,
Chris
|
| 63.11 | try this | PTOSS1::MATSCHERZ | | Tue Jan 28 1997 18:13 | 9 |
| First rule of thumb is that you should run the engine till hot and then
check the compression. If you do it cold then you'll get false readings
as to how good the thing is. If it is a stock engine (no head cuts or
mods) then you should see somewhere around 125 on the compression
tester. I'd start worrying about anything less than 95 lbs. I've
heard that some old SRV's do run low compression but who knows. I've
never owned one.
l8tr..
stevemm
|
| 63.12 | | TROOA::SCHABEL | Klatter-motor-pilot | Tue Jan 28 1997 18:33 | 6 |
| Usually as long as the difference in readings is within 5 or 10 percent
of each other from cylinder to cylinder, you should be okay. Anything
more usually means a ring/cylinder/seal/gasket/piston/reed problem.
Later,
snowman
|
| 63.13 | slowly learning... | KDCA03::CDCUP_GREENE | | Wed Jan 29 1997 10:10 | 14 |
| Thanks for the info. guys. I am going to test
it tonight.
I was ripping around on the sled lastnight, and it
ran really good. Mind you it was -24 celcius that is.
I just think that these older Pantera's need the cold
weather to run effectivly. If it was say 0 - minus 10
celcius it will not run as good. I guess it is like
that for most fan cooled engines ?
Anyway it can't hurt doing a compression test on it
every now and then.
Thanks again,
Chris
|
| 63.14 | | CPEEDY::PRINDLE | | Wed Jan 29 1997 17:19 | 5 |
| When you do the test make sure you hold the throttle wide open while yanking
on the rope, or if your lucky, turning the key.
Wayne
|
| 63.15 | ??? | BIGQ::HAWKE | | Wed Jan 29 1997 17:35 | 4 |
| why
curious
|
| 63.16 | | SOLVIT::MEREDITH | another hill? ugh | Wed Jan 29 1997 17:53 | 5 |
| with the throttle open you get the maximun air charge in the fewest
numbers of rotations. With the throttle closed you'll get a smaller
reading.
Tap
|
| 63.17 | | KDCA03::CDCUP_GREENE | | Wed Jan 29 1997 18:00 | 7 |
| Thanks for the tip, I was actually told this by
another buddy. I wasn't sure why at first but now
i know.
Thanks
Chris
|
| 63.18 | more questions | BIGQ::HAWKE | | Wed Jan 29 1997 18:02 | 7 |
| Would the engine still produce a max psi (albeit maybe in more
rotations) that is the same as with the throttle open ?? or if
the carbs weren't balanced would that contribute to uneven cylinder
pressures ? assuming a twin or more...
Dean
|
| 63.19 | a little more... | SOLVIT::MEREDITH | another hill? ugh | Wed Jan 29 1997 18:03 | 22 |
| BTW, a two stroke engine is not that sensitive to compression. A
compression test is a valid 4-stroke evaluation, but marginal on
a two stroke. As noted earlier, a two stroke will run and idle with
80-90PSI.
A 4 stroke engine is efficient only if there is "good" sealing. A two
stroke is far less efficient and doesnot need the same level of "good"
sealing. Its power is derived from moving lots of mixture and igniting
"some" of it. (this explains poorer fuel economy and horrific
emmisions)
Crank sealing is only important from a "mixture" perspective. That is
if the crank seals leak, they allow air leaks that change the
fuel-to-air mixture. So a vacuum test is much more important. If
you doubt the compression and feel the rings/piston/bore is worn, then
measurement of clearances and out of round yield much better
information than a "compression test".
$.02
Tap
|