400.1 first impression

[jurchybald]

I ported one, have two more to do. I did cut the base and than use JB weld to reconstruct that extension back. Went couple of times in and out. Didn't find any real gains to be honest. it seems it does like higher exhaust.
Second one I will try only BGD and squish cut to see if it's worth all the extra work.

 

[Duane(Pa)]

I ported one, have two more to do. I did cut the base and than use JB weld to reconstruct that extension back. Went couple of times in and out. Didn't find any real gains to be honest. it seems it does like higher exhaust.
Second one I will try only BGD and squish cut to see if it's worth all the extra work.

What does the band look like from the factory? It would probably be one of the cheapest things they could do to "copy" stuff they see here...

 

[jurchybald]

What does the band look like from the factory? It would probably be one of the cheapest things they could do to "copy" stuff they see here...

 

[Sloughfoot]

I ported one, have two more to do. I did cut the base and than use JB weld to reconstruct that extension back. Went couple of times in and out. Didn't find any real gains to be honest. it seems it does like higher exhaust.
Second one I will try only BGD and squish cut to see if it's worth all the extra work.

What stock timing numbers did you get?

 

[farminkarman]

@jurchybald
Is the piston a flat-top? That chamber looks like an Echo.

 

[farminkarman]

What stock timing numbers did you get?

He posted them here:

Post in thread '400.1 first impression'

Yesterday at 12:24 PM

Would like to see some of the rest of the "picture" so to speak, like the timing numbers and squish as it comes from the factory, along with the gasket thickness and extension gap to case measurement before trying to develop a plan of attack with the cylinder extension of this saw.
Some possible machining ideas come to mind but are hardly worth mentioning without the benefit of having an example in hand to ascertain just what can be done successfully and to the betterment of the machine.

Here you go

• jurchybald

• 

 

[Sloughfoot]

He posted them here:

Post in thread '400.1 first impression'

Yesterday at 12:24 PM

Would like to see some of the rest of the "picture" so to speak, like the timing numbers and squish as it comes from the factory, along with the gasket thickness and extension gap to case measurement before trying to develop a plan of attack with the cylinder extension of this saw.
Some possible machining ideas come to mind but are hardly worth mentioning without the benefit of having an example in hand to ascertain just what can be done successfully and to the betterment of the machine.

Here you go

• jurchybald

• 

Gracias. Don't know much about stratos but the rest of those numbers look pretty solid. Is 80 with a strato the same as 80 with a nonstrato?

 

[jurchybald]

@jurchybald
Is the piston a flat-top? That chamber looks like an Echo.

Flat top