Project "low buck 346"

[Mastermind]

A little uneven maybe.

 

[Stihlbro]

Combustion chamber differences.

If anyone has any questions, ask.

 

[Stihlbro]

A little uneven maybe.

Not by a ring or marking with a card stock. I used a slide ruler with a t, and it's close enough I can't tell. Even angle looks the same to me.

 

[Mastermind]

Saturday evening.........not many viewers.....

I'm here though. lol

 

[Mastermind]

Not by a ring or marking with a card stock. I used a slide ruler with a t, and it's close enough I can't tell. Even angle looks the same to me.

Bottom of the piston uniform?

 

[Stihlbro]

Bottom of the piston uniform?

By eyeball, yes. I think it time to put it in some wood and recheck.

Saturday evening.........not many viewers.....

I'm here though. lol

I know right??

 

[Mastermind]

I'm real interested in this head deal. The next frontier.......

 

[Stihlbro]

The chamber is small. Compression should be crazy. But that can be changed easily. This saw has plans to go west for a through check out. I won't be able to run it long enough to tell.

 

[Stihlbro]

It has woodsported timing. 102ish/120ish/76 ish numbers. Lower transfers untouched.

 

[Mastermind]

Carb?

 

[Jughead]

oh this is some cool stuff.

 

[Onan18]

I am watching avidly but this is so far above my head I have nothing intelligent to say.

Joe

 

[Stihlbro]

Carb?

I'm exhausted on trying carb set ups. Tried the 372 intake carb, can't get a filter to fit without cutting top cover. Tried to mock up a tillotson, a 371 set up. It will have stock stuff with Walbro 191 carb.

 

[Stihlbro]

I am watching avidly but this is so far above my head I have nothing intelligent to say.

Joe

I have done nothing that you can't.

 

[Mastermind]

I'm just wanting to know if you get gains from the head. I like that you are using mild numbers and the stockish carb. Should make it easier to know if making the head is gonna be worth the added work.

 

[Stihlbro]

That is my plan. Theoretically, I've only changed the combustion chamber. Never touched the base. Less work on raising transfers from cutting squishband and and setting squish. Intake nipple is perfectly round for sealing purposes.

I wish I had a way to monitor cylinder head temperatures when using.

 

[psuiewalsh]

What is sealing the head to the cylinder? Fitting under a stock cover is great work

 

[Stihlbro]

Right now, it is just two machined surfaces. I am waiting on some brass shim stock to show up.

 

[Stihlbro]

Wow

 

[mdavlee]

Looking good. I've been meaning to do one for a 046 or 66. I started on one but never finished it. I mocked it up on a dead cylinder.