dk27
ArboristSite Operative
Aussie1
In the picture in the link that you kindly provided , thats indicating to widen the bottom of the lowwer transfer. is that correct?
transfer work
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Aussie1
In the picture in the link that you kindly provided , thats indicating to widen the bottom of the lowwer transfer. is that correct?
im laying on the couch looking into my last 044 cylinder. i think its actualy the cylinder of the 440.
i noticed the upper transfer is angled, its higher on the intake side and angles down to exhaust side. i never noticed that before. im also wondering now if the 044 cylinders upp transfers are angled aswell.
i noticed the upper transfer is angled, its higher on the intake side and angles down to exhaust side. i never noticed that before. im also wondering now if the 044 cylinders upp transfers are angled aswell.
AUSSIE1
Al.
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Nah mate. I just blend it.
If you get the gasket and put it on your case the gasket fits quite well.
Look at that pic with the gasket at the cyl base and see the mismatch.
I just blend so the transition from the case to the transfers is smooth.
I don't go deep into the transfers so as not to create a bottleneck.
This is what I have done to my 371BB and 385.
scotclayshooter
Addicted to ArboristSite
I bloody well know all that! Whats with the attitude?
Read my post again and point out where i was wrong.
Read the post i replyd to as well.
dk27
ArboristSite Operative
seems to me the fuel would want to stick to the wall where there is less flow.
When i had the jug off to port it, IT did look like there was a build up of something in the lowwer transfers.Almost like a dirty varnish build up. Thats why I was curious about smoothing it out a bit.
When i had the jug off to port it, IT did look like there was a build up of something in the lowwer transfers.Almost like a dirty varnish build up. Thats why I was curious about smoothing it out a bit.
dk27
ive rebuilt 5 saws now and have never seen build up in the transfers. i know thats not very many but a few.
if theres build up in the transfers id think it must have been remarkably rich running and sludgeing the entire cylinder
ive rebuilt 5 saws now and have never seen build up in the transfers. i know thats not very many but a few.
if theres build up in the transfers id think it must have been remarkably rich running and sludgeing the entire cylinder
AUSSIE1
Al.
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Another thing DK with the 371/2 inside the transfer on the flywheel side (I think it is from memory) is more restricted compared to the opposite side.
It looks like the outer surface of the transfers have been pushed in for clearance purposes. I just port to match the other side.
It looks like the outer surface of the transfers have been pushed in for clearance purposes. I just port to match the other side.
dk27
ArboristSite Operative
Evan
I bought this saw used from a member here.I believe the saws relatively new as i needed to replace the blue coil.But the plastic is sun faded and it may have lost a ring at some point as well.As there is a small area of damage to the roof of the exaust port bevel.Muffler, piston crown and combustion chamber showwed no signs of excess oil.nor did the plug that was in it when i got it.
saw definetly has some hours on it. visable wear to piston skirt on the intake side,but it's still pulling 160#of compresion.Just unsure whatsup with transfer discoloration
I bought this saw used from a member here.I believe the saws relatively new as i needed to replace the blue coil.But the plastic is sun faded and it may have lost a ring at some point as well.As there is a small area of damage to the roof of the exaust port bevel.Muffler, piston crown and combustion chamber showwed no signs of excess oil.nor did the plug that was in it when i got it.
saw definetly has some hours on it. visable wear to piston skirt on the intake side,but it's still pulling 160#of compresion.Just unsure whatsup with transfer discoloration
dk27
ArboristSite Operative
Thanks Aussie1
I'm keeping notes!!
I just know this jugs coming off again soon
I'm keeping notes!!
I just know this jugs coming off again soon
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AUSSIE1
Al.
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Behind here and the port to the left of it is where it is restricted.
AUSSIE1
Al.
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OK, this is an aftermarket big bore barrel.
I've ported the right side but not the left.
If you look closely at the transfers to the left, inside the outer wall you can see the protrusion that needs to be ground back to equal the other side.
The bottom right hand transfer doesn't look like it is level with that bit of cyl, but if you tilt the cyl you would see that it does.
That bottom right hand corner looks nothing like it really is. It looks like it curls up before it meets the cyl, but actually doesn't. If I can get a better picture here I'll post it.
I've ported the right side but not the left.
If you look closely at the transfers to the left, inside the outer wall you can see the protrusion that needs to be ground back to equal the other side.
The bottom right hand transfer doesn't look like it is level with that bit of cyl, but if you tilt the cyl you would see that it does.
That bottom right hand corner looks nothing like it really is. It looks like it curls up before it meets the cyl, but actually doesn't. If I can get a better picture here I'll post it.
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dk27
ArboristSite Operative
Beautiful Assuie1
Thats exactly what i was hoping to see.I do see the protrusion that you we're referring to.Also how you blended and sharpened things up.
why the big mystery on doing transfer work on a jug of this type?
Obviously its a more detailed controlled type of grinding, you're just not hogging out a bunch of metal.I'll just mirror within reason what you've shown.
What kind of gains and where,would you expect to find from this work?
1. faster revving?
2. more torque?
Cutting wood this past weekend,I brought the ported, m.m. Husky 372.A ported m.m.husky 345 and a ported m.m. j'red 2152.I must say the stock Stihl guys we're quite impressed.I loved watching somebody grab the 372 for the first time.They blip the throttle, bar torques up into the air,start a cut and realize the need to stand a little more to one side . Finish a cut in 12''or 14'' red oak in maybe 5 or 6 seconds.Shut the saw off, look at the saw , look at the log, look the block they just cut and shake their head. It was priceless!!
Thats exactly what i was hoping to see.I do see the protrusion that you we're referring to.Also how you blended and sharpened things up.
why the big mystery on doing transfer work on a jug of this type?
Obviously its a more detailed controlled type of grinding, you're just not hogging out a bunch of metal.I'll just mirror within reason what you've shown.
What kind of gains and where,would you expect to find from this work?
1. faster revving?
2. more torque?
Cutting wood this past weekend,I brought the ported, m.m. Husky 372.A ported m.m.husky 345 and a ported m.m. j'red 2152.I must say the stock Stihl guys we're quite impressed.I loved watching somebody grab the 372 for the first time.They blip the throttle, bar torques up into the air,start a cut and realize the need to stand a little more to one side . Finish a cut in 12''or 14'' red oak in maybe 5 or 6 seconds.Shut the saw off, look at the saw , look at the log, look the block they just cut and shake their head. It was priceless!!
The mystery you talk of is more related to the port on the cylinder wall, not the channel leading to it. The channel is not nearly as critical. Take out too much though, and you're liable to reduce velocity. I don't think that's a concern though with the above mentioned mods.
Mastermind
Work Saw Specialist
Thats what I was hoping to hear about I've all of this before about the lower transfers, what about the cyl. port?
Thanks, I'm here to learn.
Check out my old threads. Lots of pics and comments about what I do. It's basically what Evan showed.
Mastermind
Work Saw Specialist
I see, how did I miss that. Those are good pics Evan
thanks.
the transfer blending i did was very mild. you can see in the pics the stock 440 cylinder is dang near as wide and blended to intake side . ive seen some of brads and tw's pics with trasnsfers much wider.
im home with the kids today and i think ill acid clean the stock 440 cylinder and start grinding on it. and swap it onto the 440. im going to go more exstreem everywhere and see what happens. but i need to tear down the 440 before i start grinding i want to measure the meteor piston and widen everything to just inside the piston sqirt.
maybe lay some tape inside the cylinder and grind to it . i think there will be a noticable difrence if i do this compared to my mildy ported 044 top end that is on the 440 now
the transfer blending i did was very mild. you can see in the pics the stock 440 cylinder is dang near as wide and blended to intake side . ive seen some of brads and tw's pics with trasnsfers much wider.
im home with the kids today and i think ill acid clean the stock 440 cylinder and start grinding on it. and swap it onto the 440. im going to go more exstreem everywhere and see what happens. but i need to tear down the 440 before i start grinding i want to measure the meteor piston and widen everything to just inside the piston sqirt.
maybe lay some tape inside the cylinder and grind to it . i think there will be a noticable difrence if i do this compared to my mildy ported 044 top end that is on the 440 now
Mark the exhaust port on the piston skirt before tearing it down. That way it's much easier to line up the piston in the cylinder once apart, and be able to mark exactly where the piston skirts are. However, on a well used cylinder, it's usually easy to see where the skirts ride on the cylinder wall.
after you said that i looked at my pics and the last pic i posted it looks like theres a faint line right on the edge of my intake if that is the case im there already with the intake and could widen the transfers alittle
