Saw video thread

[huskyboy]

Changed nothing except the wood.
Dipped into my firewood pile for some seasoned ash.
This time around I do believe it’s leaner than I originally thought.

Tune actually sounded spot on, I still think putting a muff on it will help.

 

[huskihl]

This jug is not going lower unless I relieve the pop up.
Original squish was .048
Used a factory base gasket and 028 super piston.
Crown was 0.142” higher than oem.
I’m at .022” squish now.
I cut a lot from the band, didn’t drop the jug at all.
If anything, there’s still some exhaust width to be had. Mayhaps that would be a benefit with only 17.5 degrees blowdown.

Sorry if I missed it, is it a closed port side fed cylinder?

 

[paragonbuilder]

This jug is not going lower unless I relieve the pop up.
Original squish was .048
Used a factory base gasket and 028 super piston.
Crown was 0.142” higher than oem.
I’m at .022” squish now.
I cut a lot from the band, didn’t drop the jug at all.
If anything, there’s still some exhaust width to be had. Mayhaps that would be a benefit with only 17.5 degrees blowdown.

How much did you raise the ex Dave? Where did it land after band cutting?

 

[paragonbuilder]

Sorry if I missed it, is it a closed port side fed cylinder?

Open port 46 mm

 

[huskihl]

I don’t see anything higher than 105 helping speed on this size saw. But I keep learning...

An 039 I had actually came with the exhaust at 100°. 64cc. I figured it would be more like 104.

 

[Fruecrue]

How much did you raise the ex Dave? Where did it land after band cutting?

I didnt raise it much. Rounded out the center for a better arch when I widened it.
The taller piston changed the numbers a bit.

 

[Fruecrue]

An 039 I had actually came with the exhaust at 100°. 64cc. I figured it would be more like 104.

I see a lot of 039/ 1127 series. Exhaust 100-102, newer saws closer to 102.
Transfers are 123-125, mid to upper 70s on intake.

 

[Fruecrue]

Would have been nice to have a baseline. Never ran a 55. I bought this one scored.
These were my notes.
Keep in mind I had originally planned and ported for a stock height piston, planned on deleting the gasket.
028 super piston came in later.
With impulse routing, didn’t seem like a great idea to use motoseal.
The timing numbers top right were after porting.
I know I timed it stock but didn’t write it down, wanted to tear it down.
I changed the transfers after I changed pistons.

 

[paragonbuilder]

Would have been nice to have a baseline. Never ran a 55. I bought this one scored.
These were my notes.
Keep in mind I had originally planned and ported for a stock height piston, planned on deleting the gasket.
028 super piston came in later.
With impulse routing, didn’t seem like a great idea to use motoseal.
The timing numbers top right were after porting.
I know I timed it stock but didn’t write it down, wanted to tear it down.
I changed the transfers after I changed pistons.
View attachment 124733

Raising the squish .14 for the 028 piston should have lowered the exhaust a lot. I’m confused ...

 

[paragonbuilder]

Raising the squish .14 for the 028 piston should have lowered the exhaust a lot. I’m confused ...

On the 262, raising .040 takes it from 103 to 110.5
.030 puts it at 108

 

[Fruecrue]

Just ran to the shop and checked again.
102ish, 120
Possible I screwed up measuring compression height.

 

[Fruecrue]

I just referred to a conversation I had with @David Young , he referenced the piston as .041” taller.
That must be it, an error on my part.

 

[paragonbuilder]

I just referred to a conversation I had with @David Young , he referenced the piston as .041” taller.
That must be it, an error on my part.

Perhaps it’s much higher stock than I think

 

[Fruecrue]

Perhaps I shouldn’t be trusted with measurements....or sawzall blades....

 

[paragonbuilder]

Perhaps I shouldn’t be trusted with measurements....or sawzall blades....
View attachment 124739

[emoji41]
I messed up some maths today...

 

[huskihl]

I just referred to a conversation I had with @David Young , he referenced the piston as .041” taller.
That must be it, an error on my part.

That looks correct. Meteor lists comp height as 19mm and 20mm. By doing the popup, you maintain factory ex and transfer height.

 

[paragonbuilder]

That looks correct. Meteor lists comp height as 19mm and 20mm. By doing the popup, you maintain factory ex and transfer height.

Did he cut a pop up? I missed that. Thought he was referring to 028 factory pop up.

 

[huskihl]

Did he cut a pop up? I missed that. Thought he was referring to 028 factory pop up.

Oh. Forgot about that...

 

[Deets066]

 

[paragonbuilder]

Oh. Forgot about that...

I wonder if meteor specs to crown edge or total height including pop up?