calling Stihl hybrid builders

[EvilRoySlade]

I see lots of 440/460 hybrids being built but has anyone attempted a 360/044 10mm build?

I can't find coneecting rod length for the 2 saws so I can't use numbers on that. The wrist pins are very close looking at the Meteor site along with the piston compression height. Makes me wonder if a the 440 cylinder will fit enough to make it possible. Anyone with experience have dimensions?

 

[huskihl]

I see lots of 440/460 hybrids being built but has anyone attempted a 360/044 10mm build?

I can't find coneecting rod length for the 2 saws so I can't use numbers on that. The wrist pins are very close looking at the Meteor site along with the piston compression height. Makes me wonder if a the 440 cylinder will fit enough to make it possible. Anyone with experience have dimensions?

It's been mentioned here, but I never did go out and check as my 036 was complete and not torn down

 

[Fruecrue]

2mm different stroke.

 

[Wonkydonkey]

But the 440 and 460 has different strokes, but I guess that's why they use the 460 crank in a 440 case. Then there's the 10mm or 12mm thing as well.

I wouldn't know if a 440 crank would fit in a 360 case thou ?.

 

[Chainsaw Jim]

But the 440 and 460 has different strokes, but I guess that's why they use the 460 crank in a 440 case. Then there's the 10mm or 12mm thing as well.

I wouldn't know if a 440 crank would fit in a 360 case thou ?.

440 and 460 share the same stroke.

 

[Chainsaw Jim]

The holes are close enough to do it.
You'll have to cut 2mm off the cylinder base for the stroke difference. That might leave the ears a little thin unless you use a thicker base 440 cylinder. The flywheel side transfer bulge looks like it will need relieved for clearance...and may not have enough material to remove.
I didn't check the top cover, but that clearance is likely going to need some attention.
If you can't modify the carb to work then you'll want to modify the carb housing to fit a larger carb and boot. With that comes a need for a velocity stack and a filter to fit.

That transfer bulge clearance with the flywheel might be too much of a problem to do the build. I'd say that it needs better measurements before any modifications begin.

 

[Wonkydonkey]

440 and 460 share the same stroke.

I was looking at the 044 & 046 manuals ( I assumed they were the same as the 440 and 460)

The 046 is a 40mm and the 044 is 36mm stroke

But I guess I just missing somthing and being dumb (as usual)

Cheers

 

[Fruecrue]

 

[Fruecrue]

I was looking at the 044 & 046 manuals ( I assumed they were the same as the 440 and 460)

The 046 is a 40mm and the 044 is 36mm stroke

But I guess I just missing somthing and being dumb (as usual)

Cheers

Perhaps you compared to an 064.

 

[Wonkydonkey]

I guess its the literature being wrong or just old and they changed the specs

https://www.stihlusa.com/WebContent/CMSFileLibrary/instructionmanuals/046_Manual.pdf. Page 49

https://www.stihlusa.com/WebContent/CMSFileLibrary/instructionmanuals/044_Manual.pdf Page 48

But I'm happy to learn that stihl changes things... Or get it wrong

I just notice they are both (1.42in) But different in mm

Cheers

 

[J_M____]

I was considering this( 036 with 044/ms440 jug) the bolt holes are very close. Slotting the mounting holes just like a 044/046 hybrid would be needed and machining the base 2mm thinner like mentioned, some of the aftermarket cylinders have really thick bases. The 036 is a 10mm pin piston, so an 044 10mm piston can be used.

 

[EvilRoySlade]

Good info guys. I have the hankering to fab stuff together so I'm coming up with ideas that might be close. I need to get hold of a case and crank of 440 to measure bearings, case clearance and stuff. It'd be fun to squeeze the 440 crank in.

 

[EvilRoySlade]

I'm cruising HL for deals to have fun with and saw a bearing set that fits the 360 and 440 saw. With no other info that tells me the case pocket diameter and crank diameter are the same.

 

[Mycamaro_68]

The holes are close enough to do it.
You'll have to cut 2mm off the cylinder base for the stroke difference. That might leave the ears a little thin unless you use a thicker base 440 cylinder. The flywheel side transfer bulge looks like it will need relieved for clearance...and may not have enough material to remove.
I didn't check the top cover, but that clearance is likely going to need some attention.
If you can't modify the carb to work then you'll want to modify the carb housing to fit a larger carb and boot. With that comes a need for a velocity stack and a filter to fit.

That transfer bulge clearance with the flywheel might be too much of a problem to do the build. I'd say that it needs better measurements before and modifications begin.

Maybe I am thinking about this wrong, but if the total stroke is 2mm different, wouldn't you only have to take 1mm off the base?

 

[EvilRoySlade]

Maybe I am thinking about this wrong, but if the total stroke is 2mm different, wouldn't you only have to take 1mm off the base?

You are correct but only in the sense that you acknowledged you might be wrong. Humble you are.

I've noticed myself blending stroke and connecting rod sometimes when pondering such things.

 

[huskihl]

Maybe I am thinking about this wrong, but if the total stroke is 2mm different, wouldn't you only have to take 1mm off the base?

Seems like it to me. But there are other variables too...rod length, compression height of the piston, and depth of the crankshaft down in the case. I guess if someone measured from the cylinder base to the squish band in each jug and the 044 was 1mm deeper we'd know

 

[EvilRoySlade]

Okay, so who's got all the parts to make this happen so that I can just play with your stuff. I promise I'll give it back in pretty close to original condition, maybe.

 

[huskihl]

Okay, so who's got all the parts to make this happen so that I can just play with your stuff. I promise I'll give it back in pretty close to original condition, maybe.

I have an 044 cylinder but no 036 case

 

[Deets066]

You can always send your crank out and have it stroked. Pricey though

 

[EvilRoySlade]

If you're bored stick your measuring device in the cylinder. Maybe someone else has a 036/360 cylinder laying around they can check too. Mine is on the saw at the moment. I need to find 036/360 junk cases and 440 crank to see if the throws will even fit. A spacer can always be made to accommodate longer stroke if the crank fits.