Tree Monkey MS462 - PART 2

tree monkey · Dec 13, 2018

Stump Shot said:
Any more testing and Scott is going to have to make Julie Anne a sandwich and send him up here. Lol

do you want white sauce on your sammich?

huskihl · Dec 13, 2018

tree monkey said:
do you want white sauce on your sammich?

How bout some chicken Alfredo?

tree monkey · Dec 13, 2018

I showed a pic of a roast beef sandwich with cotton candy and white sauce on sourdough, to a cooking forum. got ban for life.

Brewz · Dec 13, 2018

maulhead · Dec 13, 2018

tree monkey said:
I showed a pic of a roast beef sandwich with cotton candy and white sauce on sourdough, to a cooking forum. got ban for life.

Yeah....

species8472 · Dec 13, 2018

Done here down under

tree monkey · Dec 13, 2018

species8472 said:
Done here down under

very nice. any video?

species8472 · Dec 13, 2018

tree monkey said:
very nice. any video?

Sorry not mine. built by same guy that's doing my 084 pipe.

drf256 · Dec 13, 2018

Stump Shot said:
Said to heck with the neighbors ran the saw for science and stuff.

Nice test Steve.

It would be interesting to see what modding the Motor (oops engine) would do to those signals. Would raising the transfers up or intake floor down shift those points?

Saws don’t need impulse to run at WOT, the Venturi will pull fuel out of the wet side and the open needle out of the fuel line through the pump side. They need impulse to fill the wet side for starting.

If anyone wants to question this, look at the build threads for the China 440’s this year. Impulse line geometry was wrong. Nearly no impulse, saw ran just fine but wouldn’t start or restart for shít.

Edit: Wrong info. Saws need impulse to drive pump at all RPM it seems.

Stihl working Hard · Dec 13, 2018

CR888 said:
Does this mean General Motors (GM) has secretly been making hybrids for about a century? Did steam engines have hidden gas tanks? Are motorbikes just the wrong term for a two wheeled gas engine powered bike? I'm confused now so I'll sit back. The strato subject has gotten so far off topic we ended up on the beach with the 'hoover lady'!!

Fruecrue · Dec 13, 2018

Video raised some questions for me.
If we’re seeing an average pressure in where the gauge tends to visibly settle, below zero at idle, above after throttle blip, what factors are involved?
At WOT wouldn’t velocity pressure come into play?
Air/ fuel mix has mass, was in motion, then must stop. It’s the kinetic energy plus static pressure that equals total pressure. Total pressure minus static pressure equals velocity pressure.
Does this show an efficient intake or an inefficient intake?
Muh head hurts again.

Fruecrue · Dec 13, 2018

I take it back.
Those principles would only apply to fluid flow in a pipe or duct.
Maybe in the intake tract or carb bore.
Crankcase isn’t the same. It’s a chamber of constantly changing volume.

Is it too early to drink?
Can’t drink all day if you don’t start in the morning!

Fruecrue · Dec 13, 2018

Also......
If the crank pressure averages positive, one could say flow would be backwards out the intake, but that’s obviously not the case.
There’s more to it. We’re seeing an average of chamber pressure throughout its negative and positive pressure sine wave which takes into account the neutral pressure and primary compression events.

Intake open only would be more difficult to measure.

I’d like to see this same test done on a reed valve engine on both sides of the reed cage.

XP_Slinger · Dec 13, 2018

Fruecrue said:
I take it back.
Those principles would only apply to fluid flow in a pipe or duct.
Maybe in the intake tract or carb bore.
Crankcase isn’t the same. It’s a chamber of constantly changing volume.

Is it too early to drink?
Can’t drink all day if you don’t start in the morning!

You just made muh brain itch Dave. And no it’s not too early to drink.

Thanks for running that test @Stump Shot , very interesting.

Fruecrue · Dec 13, 2018

XP_Slinger said:
You just made muh brain itch Dave. And no it’s not too early to drink.

Thanks for running that test @Stump Shot , very interesting.

So you’re not picking your nose?
Just itching your brain?

XP_Slinger · Dec 13, 2018

Fruecrue said:
So you’re not picking your nose?
Just itching your brain?

Exackery

redline4 · Dec 13, 2018

I would have thought a 2 stroke crankcase would act much more different then a 4 stroke, but it's quite similar, at least to the 1.4 turbocharged engines. I use crankcase vacuum/pressure to test them for fractured pistons.
Engine warm, 8-12"h2o at idle. Snap throttle, goes to zero, then back. If you see pressure, pistons are cracked.

Stump Shot · Dec 13, 2018

tree monkey said:
do you want white sauce on your sammich?

It's Julie Anne's lunch so...

huskihl said:
How bout some chicken Alfredo?

No thanks, probably won't be able to eat chicken for some time no matter how it's prepared.

Stihl working Hard · Dec 13, 2018

Stump Shot said:
Said to heck with the neighbors ran the saw for science and stuff.

Great test there Steve thanks for sharing

Stihl working Hard · Dec 13, 2018

GCJenks204 said:
You guys really can make a guy feel dumb. I've been following along all day and my head just hurts...

+1 there Gary me as well

Tree Monkey MS462 - PART 2

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