Part Two: The Intake Port

[Wonkydonkey]

Gasket thickness.

But how thick was the gasket?..

But my thoughts are It must be about 2 or 3* different, I’m sure others will know just cos they done it before a few times or 100 more

 

[ManiacalMark]

It all depends on the saw, and its more about shape and flow, not finish texture imo.

 

[Fairways_and_Greens]

But how thick was the gasket?..

But my thoughts are It must be about 2 or 3* different, I’m sure others will know just cos they done it before a few times or 100 more

0.017"

 

[mdavlee]

How many degrees depends on stroke and how close to dwell on the top or bottom. Exhaust and transfer degrees don’t move the same amount.

 

[Mastermind]

Gasket thickness.

You did check the squish clearance....right?

 

[Fairways_and_Greens]

You did check the squish clearance....right?

Yeah. 0.019 bare. I am planning on using some liquid gasket.

 

[Mastermind]

Yeah. 0.019 bare. I am planning on using some liquid gasket.

Carry on.

 

[Fairways_and_Greens]

Sharp pencil

So this is what the port looks like relative to the ring. Kinda seems like the nub could go, right?

 

[Deets066]

So this is what the port looks like relative to the ring. Kinda seems like the nub could go, right?

Looks that way

 

[mdavlee]

Does the whole port open at TDC?

 

[huskihl]

So this is what the port looks like relative to the ring. Kinda seems like the nub could go, right?

Seems like it. Looks like there's room to go wider also if your pencil mark is accurate and if the saw likes it

 

[Fairways_and_Greens]

I left a little nub and tried to square the corners more. I took a little off the sides. @mdavlee, the port does open all the way. This was so much harder than the exhaust because of the strato. I'm not super happy with it. I would have done things different if I had a second shot at it. I had a really hard time getting the picture to show up right. The nub edge is sharper than the other so it doesn't show right.

It's back together and runs pretty decent. I can't for the life of me figure out how to get the flywheel off. It's STUBBORN!

Thanks for looking over my shoulder guys! Badass community here.

 

[Deets066]

Does the whole port open at TDC?

What mike is getting at is if the piston skirt is still partially in the top of the port at TDC, then any grinding to the roof will hinder performance rather than gain.

 

[Wisconsin Welder]

Why do some intakes have these flat spots? This is an 026 cylinder, it has this feature on one side and the bottom, my 044 has it on the bottom. Is this a velocity and direction thing? I figured if it were a volume thing the hole would still be round but smaller.

I have seen pictures of you guys grinding the cylinder end of the intake but haven't found any of what is normally done (or not) to this end.
I have to double check but if I remember right the Still intake boots are shaped like this too.

 

[Mastermind]

Why do some intakes have these flat spots? This is an 026 cylinder, it has this feature on one side and the bottom, my 044 has it on the bottom. Is this a velocity and direction thing? I figured if it were a volume thing the hole would still be round but smaller.

I have seen pictures of you guys grinding the cylinder end of the intake but haven't found any of what is normally done (or not) to this end.
I have to double check but if I remember right the Still intake boots are shaped like this too.View attachment 168669

It has to do with the carb being offset from the center of the jug....

 

[huskyboy]

It has to do with the carb being offset from the center of the jug....

I noticed the 372 and 390 exhaust are offset too Randy, same reason or were they after something different?

 

[Mastermind]

I noticed the 372 and 390 exhaust are offset too Randy, same reason or were they after something different?

It's all about packaging as far as I can tell Mason. Keeping it thinner, lighter, smaller, etc.

 

[huskyboy]

It's all about packaging as far as I can tell Mason. Keeping it thinner, lighter, smaller, etc.

Is it worth trying to straighten it?

 

[Mastermind]

Is it worth trying to straighten it?

If a tenth in an 8x8 is what you're looking for.....maybe.

I tend to leave the outlet pretty much alone on most saws because I'd rather not weaken it at all.

 

[Wisconsin Welder]

It has to do with the carb being offset from the center of the jug....

I wondered about that, I think the 044 is centered, only flat on the bottom as well.

I am hesitant to grind on this cylinder too much, its so tiny.