Author Topic: intake/crankcase stuff  (Read 328 times)

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Offline 1manband

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Re: intake/crankcase stuff
« Reply #50 on: April 14, 2016, 07:51:06 pm »
no talent on my end.  just a man who is curious how things work.  took things apart as a kid to see what's inside, still do.

not much room in there for a long spacer.  will try to fit the longest.  carb linkage may be the hardest work around?

hope it will work.

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Re: intake/crankcase stuff
« Reply #51 on: April 14, 2016, 11:35:33 pm »
no talent on my end.  just a man who is curious how things work.  took things apart as a kid to see what's inside, still do.

not much room in there for a long spacer.  will try to fit the longest.  carb linkage may be the hardest work around?

hope it will work.



That is right I forgot about the carb linkage.   That could be a pain in the arse.
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Offline 1manband

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Re: intake/crankcase stuff
« Reply #52 on: April 17, 2016, 11:18:04 am »
just a couple of screens to show just what the effect of different temperatures have.

same motor.  same formula.  only the case air/fuel temps are different.

the temps are always changing in the crankcase, as the motor turns through one rpm, (<from blair)

....basically between the temps i have used here.

when temps go higher.....the speed of sound gets faster......and the results change, because the formula used depends on the speed of sound.  it is shown as the "C" value in the screenshot.
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Offline 1manband

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Re: intake/crankcase stuff
« Reply #53 on: April 17, 2016, 12:10:25 pm »
thinking about ways to test.  have a big log here to bury the bar.

just a chainsaw hack, don't believe i can keep a steady pressure like kevin did so well in the previous chain build-off.

to keep the down pressure the same, not sure if this will work, but was thinking of attaching a dumbbell using some muffler clamps to the handle.
have 10's, 15's and 40's.

will this work?  don't want to put too much weight on to make it into clutch slippage test.

have some things to do to get the saw in working order.  bend up some linkage.  make some solid mounts.  rubber are shot.  find out what is going on with the oiler. 
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Re: intake/crankcase stuff
« Reply #54 on: April 17, 2016, 01:54:15 pm »
It should make for some interesting testing.
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Offline 1manband

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Re: intake/crankcase stuff
« Reply #55 on: April 24, 2016, 07:40:48 pm »
derailed with some other things.  original electric motor was throwing sparks.  mounted a too small spare motor to turn the armature down.

also managed to break both brushes.  after the third time dressing the brushes, putting the motor back together, etc.....and cleaning carbon dust off the commutator, too much thinking juice helped the blunder of not compressing the springs on the brushes, before placing the end cover on.  oh well.

but, did get a handlebar mount made using the small motor.
looks like i can make an adapter block to fit a short straight pipe off my strunk saw.
oiler is a no-go.

went to two hardware stores today to find longer carb mounting bolts.  the dang things are metric.  m5 0.8 thread.
could not find them any longer than the stock 2"  (50mm) length.  need a couple of 2-1/2 inch and 3 inch long.  will check another place tomorrow.  if i have to, will weld a couple together.  no-one so far around here sells metric threaded rod.

no hurry on my end.  but curiosity has got the best of me.

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Re: intake/crankcase stuff
« Reply #56 on: April 24, 2016, 09:09:14 pm »
Maybe you could find some threaded rod or something long enough on line.   That is what I do when I cannot find some local.
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Offline 1manband

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Re: intake/crankcase stuff
« Reply #57 on: April 27, 2016, 04:06:58 pm »
some slow progress.

made a good template and roughed out a thing or two.

next, have to find a wiring diagram to rewire a small westinghouse fht to be able to spin in the other direction.
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Re: intake/crankcase stuff
« Reply #58 on: April 30, 2016, 08:20:13 pm »
finished the intake blocks.  nothing fancy.  2 part mix used to fill some chips.

old 3/4" reamer, just happens to be the intake bore.  lucky.

older yet? choke kit found laying around.  package says something about a 1954 stromberg carby......hahahaha.  hope to use it for thumb drive carb linkage,  who knows if it will work.
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Offline 1manband

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Re: intake/crankcase stuff
« Reply #59 on: May 16, 2016, 04:13:51 pm »
...some more slow progress.

linkage is just about sorted out.

it has to be able to work both with and without the blocks.
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