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Mod husqvarn 322l xtorq trimmer

mad_mat222

mad_mat222

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Joined
Jun 25, 2018
Messages
51
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Cairns
I think I could still improve flow and retain the divider. This engine carb has the fuel jet pumping gas into the bottom passage but not the top. There is not a second butterfly controlling the strato flow. 98C03EA2-4AC3-461E-BA81-B07EBB03984C.jpeg
 

mad_mat222

ArboristSite Member
Joined
Jun 25, 2018
Messages
51
Location
Cairns
So did some numbers.
Compression 90 psi
Squish 1mm
strato opens 91btdc close 81 atdc
intake open 77 btdc close 68 atdc
exhaust open 107 btdc close 118 atdc
transfers open 120 atdc close 130btdc

Compression I got 90 psi. I checked this against another machine and got same figures. Actually got 80psi off my good running machine. I’m assuming since it’s a fairly large squish and compression is not that high, this is an attempt to keep wear and tear down.

The above numbers are by no means scientific but are close enough.

Thoughts suggestions?

shave the jug for sure is on the list and as per previous, thoughts on removing the intake divider for the strato?

cheers
 
mad_mat222

mad_mat222

ArboristSite Member
Joined
Jun 25, 2018
Messages
51
Location
Cairns
And what about port widths or timing and also compression? Is it worth smoothing the ports on the piston. Probably do it any way. They can be polished because it’s only airflow. Not air/mix.
 
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