Miller Mod Saws and the CS-500P Echo!

[Miller Mod Saws]

Ok boys this threads gonna take awhile so fasten your seat belts. I had a customer send me one of these saws and they intrigued me enough to buy another for a build thread. So let's get started!

 

[cgraham1]

Sweet! Build threads are cool!

 

[rburg]

Looking forward to it. I really enjoy these build threads.

 

[Miller Mod Saws]

 

[Miller Mod Saws]

 

[Miller Mod Saws]

 

[TJ the Chainsaw Mechanic]

In for the build!

 

[Miller Mod Saws]

Now for the fun shots. Lol. Somebody is gonna say wtf here. Lol.

 

[Miller Mod Saws]

 

[Miller Mod Saws]

 

[Miller Mod Saws]

I'll get some more pics in just a bit. Having problems downloading. Let's talk numbers.

 

[Miller Mod Saws]

This saw had about 6 tanks of fuel threw her and this is the run down
Stock comp=170
Stock squish=.042"
Next numbers are takin just looking threw the ports.
Ex height=120
Trans=131
Intake=82

 

[Miller Mod Saws]

So here we are. I ran this saw several tanks before I tore it down and all I got to say is stock. Ain't happen on this gutless wonder. Lol. I'll take a 421 anyday. However as you see. This is what caught my attention. 120 degree exhaust height and 11 degrees blowdown.

 

[Miller Mod Saws]

So as I'm pondering my first thought here is to take .033 from base and .010 from the squish band. That should bump the comp a nice little bit. Next the intake. I am torn here I really just wanna epoxy this thing up and make it normal. Lol. But the way it's shaped on this first saw I may just widen the top part and then blend to the triangle bottom. Idk yet. Lol.

 

[drf256]

Is the piston a mile long?

Intake port geometry fascinates me.

 

[Miller Mod Saws]

Now the exhaust. Well it needs to come up. IMO. Generally I would set a 50cc saw around 105. Not sure I can pull that off. So I may start with about 110/125/? And see what we get.

 

[Miller Mod Saws]

Sorry I can get a good pic of the trans tunnels.

 

[Miller Mod Saws]

On the 7910 I've noticed the higher you take the exhaust height the more blowdown the saw seems to like. Running on that theroy is why I've lengthened out the blowdown time as I raise the exhaust.

 

[Miller Mod Saws]

 

[Miller Mod Saws]

Is the piston a mile long?

Intake port geometry fascinates me.

No not really. Looks kinda like a standard husky piston. Lol.