044 project

[lehman live edge slab]

Just started to read this thread and early on someone was wondering if an 048 top would work on 044 cases. Didn’t have a 048 apart but I did have a 042 jug sitting on shelf. Here is a 12mm slant fin 044 compared to an 042. I think a guy could make one fit with some measurements and fitting. But might be wrong.

 

[MattG]

Hey guys,

So I just fitting on my HD a/f kit earlier this evening, and puzzling over how stuff went back together seeing as it was ages ago when I stripped it down.

Anyway what I can't get my head round is that the older filter base has got a cutaway for the snorkel of the carb, but the new HD one actually blanks off the snorkel (i.e. it has a stub that basically closes the snorkel off). See the piccies, heres the old one with obvious cutaway where you can see through:



and now the new HD one:



and the other side

I'm gonna shout out to @MustangMike . Do you know what the score is with this arrangement Mike (or anyone else ).

Doesn't it stop the "dirty air filter compensator" working etc. etc. ? Or does that not matter?

cheers!

 

[MustangMike]

My 044 came with one like that, it allows you to run a carb with or w/o the snorkel. If you only plan to run a snorkel carb on the saw, just drill it out. That is what I did when I put and HD-11 on the 044. Just drilled three holes through it. (center, left & right).

That will allow your carb to function as an "intellicarb", which supposedly adjusts the fuel lever a bit when the air filter is dirty.

 

[MattG]

My 044 came with one like that, it allows you to run a carb with or w/o the snorkel. If you only plan to run a snorkel carb on the saw, just drill it out. That is what I did when I put and HD-11 on the 044. Just drilled three holes through it. (center, left & right).

That will allow your carb to function as an "intellicarb", which supposedly adjusts the fuel lever a bit when the air filter is dirty.

Thanks Mike, that's cool, makes a lot more sense now, guess I'll drill my one too then.

 

[lehman live edge slab]

Wasn’t trying to highjack this thread with the 042/048 comments. Was brought up early in this thread. I started a thread for this and any input would be good. Maybe with some advice I can build one and it would be something different.

 

[jacob j.]

Just started to read this thread and early on someone was wondering if an 048 top would work on 044 cases. Didn’t have a 048 apart but I did have a 042 jug sitting on shelf. Here is a 12mm slant fin 044 compared to an 042. I think a guy could make one fit with some measurements and fitting. But might be wrong.

The first issue you'd run into is the difference in wrist pins- the 042/048 piston uses a 13mm pin and modern 044/440s use a 12mm pin. So like you'd have to make some kind of bushings for the wrist pin bosses on the 042/048 piston.

 

[MattG]

The first issue you'd run into is the difference in wrist pins- the 042/048 piston uses a 13mm pin and modern 044/440s use a 12mm pin. So like you'd have to make some kind of bushings for the wrist pin bosses on the 042/048 piston.

And presumably need piston clips with some kind of tail? Unless the bushing incorporates the clip groove. It does sound a bit tricky right there.

 

[Cracker Boy]

I have heard of 038 magnum or mag 2 cylinders on 044s @jacob j. Could xhime in on this i do know they were the same bore as 044

 

[Adamski]

View attachment 95284

And all from that shoddily delivered package...

 

[MustangMike]

If the bore is the same, why bother?

 

[Adamski]

If the bore is the same, why bother?

I agree with you Mike but arn't those 048's 77cc and old school torque piggies?? Pretty sure the strokes are all different though.

 

[lehman live edge slab]

I started a new thread for this and I’m going to measure the 048 piston and 046 piston today. See if I can get around the 048 having different wrist pin than a 044 by using 046 piston in the 048 cylinder.
The 042,044,046 and 048 all have the same stroke. The 038 mag is 2mm shorter.

 

[Adamski]

I started a new thread for this and I’m going to measure the 048 piston and 046 piston today. See if I can get around the 048 having different wrist pin than a 044 by using 046 piston in the 048 cylinder.
The 042,044,046 and 048 all have the same stroke. The 038 mag is 2mm shorter.

Where is where it looks that my brain got this info from as I looked at putting an 046 cylinder on my 038 mag. That dream ended pretty quick.

But surely an 046 top end on an 044 produces more torque an hp and a lot less hassle than an 048 (Although going by @MattG 's time on this project, that is debatable )

 

[Basher]

If the bore is the same, why bother?

It all has been done before and all of it has been a waste of time and effort performance wise but it is a neat thing to have something different that will actually run even though the performance is much less than the saw one started out with. Experimenting is often the most fun part of this madness, especially after one has torn down and repaired hundreds of mundane stock saws. Some will ask why they end up with less performance, in the most part it is a matter of the combustion chamber volume compared to the crankcase volume and the amount of flow available from the crankcase to the cylinder top end.

 

[lehman live edge slab]

Like I said may not be worth it but if the piston out of an 046 will Work in the 048 cylinder the bolt pattern might bolt up as is on the 048 to 044.

 

[MattG]

But surely an 046 top end on an 044 produces more torque an hp and a lot less hassle than an 048 (Although going by @MattG 's time on this project, that is debatable )

Adam! I enjoy a good challenge!

Seriously, though, I do love just tinkering with stuff. If it works good too then that's a damn good side benefit

It's coming on good now. Me and the wife managed to get the f**king recoil spring back in the case last night. Loads of fun! Wife reported (after the event), that "Yes, you did get a bit tetchy half way through love".

Try to get a couple more piccies up later today.

 

[drf256]

It all has been done before and all of it has been a waste of time and effort performance wise but it is a neat thing to have something different that will actually run even though the performance is much less than the saw one started out with. Experimenting is often the most fun part of this madness, especially after one has torn down and repaired hundreds of mundane stock saws. Some will ask why they end up with less performance, in the most part it is a matter of the combustion chamber volume compared to the crankcase volume and the amount of flow available from the crankcase to the cylinder top end.

Well put.

 

[drf256]

I have heard of 038 magnum or mag 2 cylinders on 044s @jacob j. Could xhime in on this i do know they were the same bore as 044

The 038 mag is a 52mm jug. 038 Super is 50mm which is the same as an 044.

The 038 series have a shorter stroke than the 044/6

I’m not sure it’s worth the extra work if an 046 Jug ain’t that hard to put on and is more geometrically there already.

Now, adding a 461 jug. THAT would be exciting.

 

[MattG]

Now, adding a 461 jug. THAT would be exciting.

Isn't that a strato design? So all the stuff upstream of the intake side would need swapping out?

 

[Basher]

Well put.

When many of these swaps/transplants were tried the making it fit and run was the most fun part. Making the pin cups,shortening the pins to fit into the cups and the other clearancing and base hole reshaping were all fun to work out. The mufflers sometimes needed extensive cutting and fabrication to fit back on the saw being used. The expected performance increase just did not pan out well. Those engineers that designed the individual saws were not stupid or lazy, the design of the whole engine must balance out the design of the individual components. Now if a 044 cylinder had a quad transfer a little crankcase volume adjustment would really wake them up even more.