064 cylinder comparison

[Deets066]

The ks intake is poorly shaped
View attachment 25608

What is the notch in the bottom of the cylinder below the intake?

 

[trooney]

 

[huskihl]

What is the notch in the bottom of the cylinder below the intake?

It's so the 064 gremlins could get out before someone threw a 66 jug on 'er

 

[jmssaws]

What is the notch in the bottom of the cylinder below the intake?

Don't know.
The ks is the only one with it

 

[Definitive Dave]

Thanks for doing this Jason.
I got the cylinder from Lil Red Barn through Amazon.
They are good to deal with, like most suppliers they don't tell you who really made it
I imagine HLSupply can also provide these jugs.
Very interested in how they turn out.
Dave

 

[jmssaws]

Combustion chamber cc's
Mahle 9cc
KS 9cc
Am 14cc

 

[jmssaws]

Aftermarket transfers mahle transfers ks transfers

 

[mdavlee]

Combustion chamber cc's
Mahle 9cc
KS 9cc
Am 14cc

I bet the aftermarket will be a bit lower on compression. I can't remember what the 066 were. I want to say 10cc or so.

 

[jmssaws]

I got one more mahle I just checked it's
104
125-126
73
9cc

 

[jmssaws]

Base thickness
Mahle .260
KS .285
Am .520

 

[jmssaws]

I bet the aftermarket will be a bit lower on compression. I can't remember what the 066 were. I want to say 10cc or so.

A mahle no decomp 066 is 8cc.
I just checked one

 

[mdavlee]

A mahle no decomp 066 is 8cc.
I just checked one

The one I checked was a stihl brand.

 

[jmssaws]

So which cylinder is going to be the strongest? And why?

 

[mdavlee]

Is by the numbers and chamber over the others. The last mahle will be real close with the higher transfers over the other one.

 

[jmssaws]

Is by the numbers and chamber over the others. The last mahle will be real close with the higher transfers over the other one.

I'm gonna say the last mahle will be the strongest.
The AM will be at the bottom but I don't think it will be far behind.

 

[jmssaws]

This ks is the worst one I've seen for finish,port shape is bad and ruff as a cob.

Ks is my favorite cylinder because of how nice they are but this one is terrible.

 

[Brewz]

I will have to pop the top off the 064 I have at home with a KS jug on it and check timing.

It was strong as an ox, even with a fully baffled muffler.

Timing looks much better than any of the 066/660 hugs i have.
I may keep the 064 and sell the 372 I was going to keep.

I just love stihls and this model is a cracker

 

[mdavlee]

This ks is the worst one I've seen for finish,port shape is bad and ruff as a cob.

Ks is my favorite cylinder because of how nice they are but this one is terrible.

Ugly don't make it slow though. That one and the last mahle will be about even I'm guessing. Rough texture isn't preferred past the intake port since the fuel is turning to vapor there but they usually run good any way.

 

[jmssaws]

Ugly don't make it slow though. That one and the last mahle will be about even I'm guessing. Rough texture isn't preferred past the intake port since the fuel is turning to vapor there but they usually run good any way.

I don't think it will run bad it's just the worst oem cylinder of any kind I've ever seen. The intake varies several degrees from 0ne side to the other.
The transfers have 2 more degrees of angle than the others so it will be interesting to see how it compares.

 

[mdavlee]

Yep. They'll be a difference but it will be very small I bet.