Spuds Porting and Tuning Thread

[Ghilley]

Hi I guess there's probably a thread somewhere but what is the best way to hot up a 064 that's compleatly stock thanks

[Eddy_t]

Hi I guess there's probably a thread somewhere but what is the best way to hot up a 064 that's compleatly stock thanks

 

 

Open the piston windows nice and wide, open the intake up - you can really open it as the piston rings don't go down there, widen the lower transfers and smooth the step out and finally, widen the exhaust but you'll have to raise the roof of the exhaust slightly. Fit a dual port muffler (or make one) or it'll overheat and you'll go through pistons like mad!

 

 

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[spudulike]

Hi I guess there's probably a thread somewhere but what is the best way to hot up a 064 that's compleatly stock thanks

 

I did one fir a milling Doctor on this site, there are things you can do.

 

On the one I did, it had very uneven uppers so I leveled and reduced blowdown time.

 

The ports can't be widened touch due to the width of the piston skirts so take the previous comments with a pinch of salt...sorry Eddie:blushing:

 

I think from memory, that the base gasket can come out but measure it!

[Eddy_t]

I did one fir a milling Doctor on this site, there are things you can do.

 

 

 

On the one I did, it had very uneven uppers so I leveled and reduced blowdown time.

 

 

 

The ports can't be widened touch due to the width of the piston skirts so take the previous comments with a pinch of salt...sorry Eddie:blushing:

 

 

 

I think from memory, that the base gasket can come out but measure it!

 

 

No worries, tbh those cylinders, once worn in are easy to get the line of where you can port to though, as the skirts dull the cylinder but the lower transfers are shiny.

I know the ipl also lists 2 different base gaskets for that saw, so the piston may have to be turned down to use liquid seal, or get a thinner gasket

 

 

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[wyk]

I did one fir a milling Doctor on this site, there are things you can do.

 

On the one I did, it had very uneven uppers so I leveled and reduced blowdown time.

 

The ports can't be widened touch due to the width of the piston skirts so take the previous comments with a pinch of salt...sorry Eddie:blushing:

 

I think from memory, that the base gasket can come out but measure it!

 

I forgot to ask - does anyone have an 064 piston laying about can measure the diameter to the skirt edges? I have a feeling my ports may be a bit too wide on this HyWay to save it and use an o64 piston.

[spudulike]

I forgot to ask - does anyone have an 064 piston laying about can measure the diameter to the skirt edges? I have a feeling my ports may be a bit too wide on this HyWay to save it and use an o64 piston.

 

I think I have one - you need the width across the skirt - the "chord" length I guess??

[spudulike]

33.9mm inlet 33.7 exhaust - the skirt has a scalloped edge and isn't straight - I believe the Meteor one has straight edges and is a lot wider!

[spudulike]

Found what I was looking for Wes - try this http://arbtalk.co.uk/forum/chainsaws/33857-whats-your-bench-today-99.html#post700208

 

Should be helpful but do make sure that you check the meteor is still the same if you buy one, the 066 one I purchased was the same as the OEM part:blushing:

[wyk]

I think I have one - you need the width across the skirt - the "chord" length I guess??

 

Pleez And thanks for that, bud!

[wyk]

33.9mm inlet 33.7 exhaust - the skirt has a scalloped edge and isn't straight - I believe the Meteor one has straight edges and is a lot wider!

 

Wow, that meteor is huge. I'm gonna go clean up that cylinder now, I reckon.