Chainsaw Porting Theory

[Chris Zautner]

Thanks mike,I thought with so much volume gone I could open the transfers and intake bigger, 288 piston also.

Definitely new territory for me.

Will there be a build thread?

 

[jmssaws]

Will there be a build thread?

Yes sir.

 

[Chris Zautner]

Yes sir.

I like to hear that!!

 

[Mastermind]

WooT WooT

New and exciting stuff.

I peed a little bit.

 

[awol]

I don't know enough about it to explain how. @awol can explain

I'll see if I can do a thread on making one using basic shop tools.

 

[dall]

WooT WooT

New and exciting stuff.

I peed a little bit.

they say bladder control issues are a sign of age lol

 

[jmssaws]

I thought a loose bladder was normal.

I'm excited to play with this,I think we're going to learn something gentleman.

 

[Mastermind]

they say bladder control issues are a sign of age lol

Don't judge me.

I only peed a little........jeeze.

 

[dall]

lmao

 

[Mastermind]

I'll see if I can do a thread on making one using basic shop tools.

Alan....

You're one of the coolest dudes I've met.

 

[jmssaws]

Alan....

You're one of the coolest dudes I've met.

I must agree!
He's very close to me so we are going to have to get are heads together.

 

[RIDE-RED 350r]

All of this is making me want to run a degree wheel on one of my 250r's! LOL!

 

[jmssaws]

I'm curious if I need a different set of numbers for this crank.

Lower more open transfers or the same with more pressure? More questions than answers.

 

[Mastermind]

Try it with no changes first.

 

[drf256]

But he can't lower the transfers after the fact.

 

[jmssaws]

I'm gonna put it in there and change nothing and we'll compare video.

If it doesn't gain I've got plenty of cylinders we can experiment with.

I'm gonna use my ported red light for the guinea pig as always.

I got a cylinder and a 288 piston ready to go incase.

 

[shorthunter]

If the pressure waves are only for 10*, how does it backstuff a transfer that opens 20* later?

10° after the transfer port opens.

@tree monkey suggested earlier in this thread that the crankcase probably runs 10 psi or less, that means that the exhaust gases likely backflow into the transfers on every production chainsaw ever produced, regardless of the ammount of blowdown

 

[tree monkey]

I'm gonna put it in there and change nothing and we'll compare video.

If it doesn't gain I've got plenty of cylinders we can experiment with.

I'm gonna use my ported red light for the guinea pig as always.

I got a cylinder and a 288 piston ready to go incase.

smaller case means less fuel in, less fuel out.

shorter dur.

 

[jmssaws]

smaller case means less fuel in, less fuel out.

shorter dur.

So I need to gain intake duration and some volume?

 

[tree monkey]

no no no no no no no no no no