my 2153

[tree monkey]

i'm trying to rebuild this build thread from AS
hope this goes better then my first attempt

I will be as detailed as possible.
the saw is a new in the box 2153 deluxe. (heated handles)
so we start by ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................and then..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................or I could--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------but what if I==========================================================================================================================================================================================================================================================================================================================================================================================so then__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ so there you have it. hope you found this helpfull

 

[tree monkey]

the saw is a 2153 heated handle

 

[Deets066]

View attachment 8549

the saw is a 2153 heated handle

Are you just redoing the thread or actually redoing the saw again?

 

[tree monkey]

the stock port numbers were
in 146
ex150
tr 110
bl 20
sq 33
bg 20
removed the base gasket and got
in 150
ex 146
tr 106
sq 13
bl 20

 

[tree monkey]

rebuilding the thread with what I have

 

[tree monkey]

I cut .045 off the base, and .065 off the flange.
I cut .020 more off the flange because I don't use a gasket.

 

[dieselfitter]

i'm trying to rebuild this build thread from AS
hope this goes better then my first attempt

I will be as detailed as possible.
the saw is a new in the box 2153 deluxe. (heated handles)
so we start by .....
so there you have it. hope you found this helpfull

This 1st post reads like the typical post link bucks AS thread.

 

[jrsdws]

 

[tree monkey]

a hand cutter leaves these little chatter marks.

 

[tree monkey]

this is what I use to sand the squish band

 

[tree monkey]

this is what I use to check squish clearance



.017 I can live with that

 

[tree monkey]

after cutting base and squish
in 158
ex 133
tr 87
bl 23
sq 17
these numbers may not be exact but, good enough for what I need to know.
there all going to change anyway.

 

[bryanr2]

 

[tree monkey]

after cutting the squish I always put a ring all the way to the top to insure that the piston has the clearance it needs. take care in doing this so you don't break the ring.

 

[tree monkey]

it' not the best pic, but it shows that the heat shield has a larger port opening then the cylinder. I match the sides and bottom, but raise the top more.
you would not want to do this to a pipe saw.

 

[tree monkey]

I put the sanding mandrel in the cylinder and mark the stock port with a fine line ever sharp pencil. I then measure port width.
the bore is 1.740, 65% of the bore is 1.131. that's what I want. it's at 1.004 stock

 

[tree monkey]

I cut a divot in the center of the port window and check port timing. I repeat this until I get to 2*short of my target duration. I work one side at a time, widening and blending to the center. about .060 wider per side. I put the mandrel back in, if i'm working on the right side , I line up the mark to the port on the left side. once I get the shape I want, I mark the right side. then repeat the process on the left side. all this is done with a hog.

 

[tree monkey]

a little more work with a double cut and a diamond cutter and this will be good. slow and careful till I hit my target width and duration.

 

[tree monkey]

using the base gasket to match the base to the case is not the best, but is a good starting point. the flange needs to be widened upward in this pic to the outer corner of the port, parallel to the top line. in the past, that is where I left it. but i'm going to widen the port window . in order to do that correctly , I need to widen the entire port.

 

[tree monkey]

here you can see how much wider i'm making the transfer tunnels