MS440 -> 460 Conversion and Build

[Sawdustmaker]

Just having a bit of fun with you, calm down.

I was just funning you because it sounded a lot like you were questioning Brad when you admit yourself that you don't have it all down yet. That's funny to me. That is all.

No sweat, bro. I realize that i do not know this and that is part of my point.

I tried once and simply got poked at for my porting job so i tried to be more clear.

I am not trying to ssay brad does not tune a saw. i was asking why he seemed to brushs off the effects of case volume.

Not that i know the exact effects, but I do not port for pay....

like i said here..

 

[edisto]

From what brad said it sounded like the crankcase volume was not part of his concerns. I was asking if this was true. I can widen ports with my router if i want, :censored:.... but tuning all these things in my saw is way over my head at his point. That would be the only reason i would actually pay someone to moddify a saw for me.

I think what Brad meant was that changes in crankcase volume have minor effects on delivery ratio, and above most idle speeds, a reduction in crankcase volume relative to piston displacement tends to improve delivery ratio...up to a point.

If crankcase volume gets too small, the pressure moving the charge through the transfers can cause unexpected changes in scavenging.

As far as changes in intake resonance, again, small changes in crankcase volume have minimal effects relative to the structure of the intake.

 

[landyboy]

I tried once and simply got poked at for my porting job so i tried to be more clear.

I am not trying to ssay brad does not tune a saw. i was asking why he seemed to brush off the effects of case volume.

Not that i know the exact effects, but I do not port for pay....

Blackcat put out some bait and you bit straight off. Its just fun thats all. Was funny though

 

[Sawdustmaker]

I think what Brad meant was that changes in crankcase volume have minor effects on delivery ratio, and above most idle speeds, a reduction in crankcase volume relative to piston displacement tends to improve delivery ratio...up to a point.

If crankcase volume gets too small, the pressure moving the charge through the transfers can cause unexpected changes in scavenging.

As far as changes in intake resonance, again, small changes in crankcase volume have minimal effects relative to the structure of the intake.

Your prolly right but i was just trying to understand why this was his responce to being asked abouthe difference.

I imagine it is. Shouldn't be much different than putting a 066 top end on a 064. Some have put 066BB on a 064 and 046BB on a 440.

The question i was asking is in my first post. it was not answered so i reworded it. a little stronger.

 

[Sawdustmaker]

Blackcat put out some bait and you bit straight off. Its just fun thats all. Was funny though

Whatev...

that is not that way i see it...

 

[edisto]

Your prolly right but i was just trying to understand why this was his responce to being asked abouthe difference.

I understand your point...I was just trying to answer the part of the question that I could.

 

[Sawdustmaker]

I understand your point...I was just trying to answer the part of the question that I could.

Thanks, i hope i am clear.... i sure don't mean anything against brad... i hope he understands...

 

[rupedoggy]

Brad, Do me a favor and try the base gasket for the 046 on the 044 crankcase. I think the holes are wider for the 046. I tried to put a 046 crankshaft into a 044 crankcase and it was too wide. The 046 case I have is actually wider that the 044 cases. Gas tanks interchange but I do not think the cases or crankshafts or cylinders do. Mike

 

[GASoline71]

Whatev...

that is not that way i see it...

That's because your young and wanna bow up everytime someone remotely challenges you... be careful... you don't wanna go writin' checks in life your body can't cash...

Gary

 

[Sawdustmaker]

Brad, Do me a favor and try the base gasket for the 046 on the 044 crankcase. I think the holes are wider for the 046. I tried to put a 046 crankshaft into a 044 crankcase and it was too wide. The 046 case I have is actually wider that the 044 cases. Gas tanks interchange but I do not think the cases or crankshafts or cylinders do. Mike

It requires some fun "changes"

 

[Evan]

were have i heard that line before

 

[GASoline71]

The movie Top Gun...

Gary

 

[Sawdustmaker]

Blackcat put out some bait and you bit straight off. Its just fun thats all. Was funny though

That's because your young and wanna bow up everytime someone remotely challenges you... be careful... you don't wanna go writin' checks in life your body can't cash...

Gary

I really did not see it as bait. He had a valid point that I do not know anything about what i was asking if brad was addressing.

Thanks for your concern though...

 

[GASoline71]

Trust me... I ain't concerned... just amused.

Gary

 

[Metals406]

:arg:

 

[blsnelling]

The saw is done except for a few odds and ends. This was a marathon build and I did not get detailed pics of the conversion details. They're not difficult though, just time consuming. Here's a summary.

1. Slot the cylinder base mounting holes. Use a 440 cylinder gasket as a timplate.
2. Clearance the right transfer port to clear the CC.
3. Clearance the left transfer to clear the flywheel fin tips.
4. Clearance the mounting flange on both sides. Not much more than removing the cast in letters was necessary.
5. Trim the plastic deflector hanging down on the bottom of the engine shroud.
6. Add about 1/4" spacers behind the bottom mounting bolts of the muffler.

 

[wigglesworth]

what...no 1 A.M. video??

 

[blsnelling]

Here's a summary of what was done to this saw besides the conversion. The following parts were all replaced. There are a few odds and ends left to tie up, but it's ready to run tomorrow.

1. P&C.
2. Crank seals.
3. Cleaned carb.
4. Intake elbow.
5. Fuel line.
6. Impulse hose.
7. Model plates and decals.
8. Air filter.
9. Elastostart.
10. Spikes and chain catcher.
11. Loop handle.

I started with this yesterday afternoon

Factory port opened significantly. Muffler, heatshield, and gasket all port matched to the ported cylinder.

 

[blsnelling]

Additional exhaust opening with Husky deflector.

 

[wigglesworth]

looks good. So P&C was left alone? no port work?