Let's Talk Transfers

[Mastermind]

No. Actually they are physically higher. Less blowdown in the 6400 than in the 7900.

These Dolmars are theory busters. lol

 

[drf256]

Should be higher.

More case volume. Lazier.

 

[paragonbuilder]

Wow, ok!
So what is the purpose of an open verses closed port? I can't imagine its really any cheaper to cast?




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[Mastermind]

Should be higher.

More case volume. Lazier.

That's how it works for me too Al.....

Terry was talking bigger = lower. That flies in the face of everything I think I know.

 

[jmssaws]

I can't make a saw run without raising the transfers,I don't see how widening without raising will work,I generally don't widen at all,I don't like hanging a ring.

It may work but my hard head is having a hard time with it.

 

[Mastermind]

I'm of the belief that an overly wide transfer won't scavenge as well.

I'm building a new jug for the pipe saw. I'll be trying a few things....

 

[jmssaws]

I'm of the belief that an overly wide transfer won't scavenge as well.

I'm building a new jug for the pipe saw. I'll be trying a few things....

That's my next step, gonna try to build a head saw on a muffler then maybe a pipe.
I use to build pipes for midget sprint cars i hope I can remember. Lol

 

[Mastermind]

I had Gink build this pipe. He did a fantastic job on it.

 

[jmssaws]

Good lookin pipe and saw.
Nothing like a 1122 with a pipe sticking out of her.

 

[Mastermind]

It has a NWP big bore jug, with a Husqvarna 395XP piston.

 

[jmssaws]

I had a really good running cylinder that I killed by widening the uppers and taking the lowers down almost to the bottom.
Lesson learned

 

[jmssaws]

It has a NWP big bore jug, with a Husqvarna 395XP piston.

I've got that same cylinder and piston,it don't run bad but it's in a box somewhere and not on a saw.

I think I seen that saw in a video before,run out of gas on the last cut?
If it was it it's a great running saw.

 

[Mastermind]

That's it.

I still had the fuel filter on it.....and it was pulling more fuel that the filter would supply.

 

[paragonbuilder]

Wow, ok!
So what is the purpose of an open verses closed port? I can't imagine its really any cheaper to cast?




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[Mastermind]

Closed port = cooler a/f charge, and much better entry angle.

 

[paragonbuilder]

Closed port = cooler a/f charge, and much better entry angle.

Is there any benefit to open port? I see the 200t I've got apart is open port???


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[Mastermind]

Not that I can really see. I always thought of open port saws as cheaper versions. I'm sure I just don't know enough to understand......

 

[Redfin]

Great thread! And thanks to all that have tried and shared. I have a 660 on the bench now im rethinking the numbers. Good times.

 

[jmssaws]

That's how I see it randy.

 

[jmssaws]

Great thread! And thanks to all that have tried and shared. I have a 660 on the bench now im rethinking the numbers. Good times.

Whats a 660?