Spuds Porting and Tuning Thread

[spudulike]

Beware of the transfer bolts, they're barely clear of the crank on my saw, all I've done is liquid seal the base instead of a gasket!

 

Are you talking about the transfer cover bolts and the clearance to the rear of the flywheel?

[div_h]

I'm so torn between getting an older 357 or a new 560 next

 

Show off you going to have a fleet of ported saws

[Chris3King]

One or two maybe but not to be used by anyone else then

[div_h]

This is the 357XP although we increased the pop up size afterwards

 

 

How high is the "pop up"

[Eddy_t]

Are you talking about the transfer cover bolts and the clearance to the rear of the flywheel?

 

 

That's the ones! And the ridge on the clutch side!

[wyk]

9t .325

 

You still running like a 16" bar or sumfin? If I had a ported 562, I would be running it with a 20" bar and 3/8 chain. My 43cc saw runs a 16" 325 bar.

[Eddy_t]

You still running like a 16" bar or sumfin? If I had a ported 562, I would be running it with a 20" bar and 3/8 chain. My 43cc saw runs a 16" 325 bar.

 

 

18" on mine wes

[spudulike]

Started on Mattys 560XP, this saw had a crank stuffer break up and small parts of the stainless surround ended up taking out the piston and creating some damage to the strato and upper transfers.

 

He sent it in with a new piston which wouldn't slide up the bore down to the swelling of the material around these ports.

 

Sounds terminal but I stripped the transfer covers off, took the manifold off and then worked lightly with a diamond bur and managed to flatten the damage and followed up with a light hone to flatten the area.

 

The piston now slides in as it should and think we will get away with this.

 

Next job is to work on the forward facing transfers as there are a few angles there that would be better smoothed, flow likes smooth curves, angles cause turbulance:thumbup:

 

There are bulges in the mid transfer port which are extra material for the exhaust bolts - I will smooth this area and reshape the uppers.

 

The exhaust will get widened as will the inlet.

 

I am currently contemplating changing the strato system in to extra crank charge by modifying the intake area but will face this one once I have more info!

[MattyF]

Sounds like it's coming along , glad you saved the cylinder !

Just put the short block back together with ancillaries and will try and post tomorrow mate.

What's it going to take to get martin on his lathe ??

[log on tommy]

spud, I've got a husky 61 (which I've just replaced with a 560xp) that won't run on its side and refuses to be tuned. I sent it to a local guy who put a carb kit in it when it came back it ran ok for a morning but then wouldn't tick over. I altered the tick over screw and she ran all afternoon. now she won't stand any revs as she just bogs down and conks out. I took it back to the chap who can't make head nor tail of it and he said sell it as a non runner. have you come across these symptoms before?

Cheers

tom