WANT MORE OUT OF SHINDAIWA 757

[peter92]

Tony might be able to help you out?? @Brewz

lets hope so

 

[Iron.and.bark]

i just gotta find some one over here in Australia now to do me a mod

*cough*

 

[beaglebriar]

*cough*

Ah hah! I forget how many of you Aussies are on here.

 

[peter92]

*cough*

gee you get around , how about it , there young fella

 

[peter92]

Ah hah! I forget how many of you Aussies are on here.

theres a few of us left down here haha

 

[Iron.and.bark]

gee you get around , how about it , there young fella

Happy to help out.

I am not surprised, people did not think of anyone but brewz.

One thing that amazes me is how folks can work on a saw and regularly take pics as they go and post to a thread on it. I find trying to do it effects my rhythm of work to much.

 

[peter92]

Happy to help out.

I am not surprised, people did not think of anyone but brewz.

One thing that amazes me is how folks can work on a saw and regularly take pics as they go and post to a thread on it. I find trying to do it effects my rhythm of work to much.

know what you mean, did that with a 61 , taking pics and so on , when the saw was all complete i looked down and , i left the oiler hose off , so split the saw all over again for one 30mm bloody hose

 

[Brewz]

Happy to help out.

I am not surprised, people did not think of anyone but brewz.

One thing that amazes me is how folks can work on a saw and regularly take pics as they go and post to a thread on it. I find trying to do it effects my rhythm of work to much.

Easy
Each time you pause to drink some beer you take a pic and post it.
When I was learning (do we ever stop) I loved threads with lots of pics.

I enjoy posting stuff up in the hope someone gets something from it one day.

I have limited tools set up for metal working so Nick or Vince may be better options.

They all do good work!

 

[peter92]

Easy
Each time you pause to drink some beer you take a pic and post it.
When I was learning (do we ever stop) I loved threads with lots of pics.

I enjoy posting stuff up in the hope someone gets something from it one day.

I have limited tools set up for metal working so Nick or Vince may be better options.

They all do good work!

 

[peter92]

thanks for that , and i know vince does for sure he did my muff on my 031 when he rebuilt it
gave it to him in a box of bits

 

[tree monkey]

found my build sheet. all measurements are in sae & duration

stock
intake 165
exhaust 173
transfer 107?
squish 69

cut .060 off the base, deleted base gasket

intake 176
exhaust 157

I cut the squish flat, .022, witch left me with a narrow band, cut the piston to match and recut the dome so there was no sharp edge.
epoxied the flour of the intake to 160.
raised transfers to 120.
widened exhaust from 1.042 to 1.280.

saw runs strong, I don't have any pics or vids of it.

 

[Brewz]

Thats stock:
93.5/107?/82.5
69 squish is horrific!

TM, do these cylinders have a flat base like a stihl or a lipped base like a husky?
I am just wondering if it would be possible to sand the base to get squish down to 20 thou without using a lathe?

removing .050 from the base should give something closer to 99* on the exhaust and would definately need to intake filled back up to 78 or 80*

That thing is never going to be fun to mill with with that sort of timing and squish

 

[tree monkey]

it's been awhile but I think it was flat. the combustion chamber is as ugly as it gets. I don't know if you can make it that tight in stock form.

 

[tree monkey]

it's like a 026 but worse

 

[peter92]

found my build sheet. all measurements are in sae & duration

stock
intake 165
exhaust 173
transfer 107?
squish 69

cut .060 off the base, deleted base gasket

intake 176
exhaust 157

I cut the squish flat, .022, witch left me with a narrow band, cut the piston to match and recut the dome so there was no sharp edge.
epoxied the flour of the intake to 160.
raised transfers to 120.
widened exhaust from 1.042 to 1.280.

saw runs strong, I don't have any pics or vids of it.

thanks for putting all that up and finding it , as a person that has never been into this sort of thing , the numbers look very impressive , but ive got no way of doing any of that , would need to send it away to get done
was that saw done for racing and how did the saw run , i read a comment where it was said that "it wouldnt be any good for milling " whats your thought
also what would some thing cost to get done
Peter

 

[peter92]

Thats stock:
93.5/107?/82.5
69 squish is horrific!

TM, do these cylinders have a flat base like a stihl or a lipped base like a husky?
I am just wondering if it would be possible to sand the base to get squish down to 20 thou without using a lathe?

removing .050 from the base should give something closer to 99* on the exhaust and would definately need to intake filled back up to 78 or 80*

That thing is never going to be fun to mill with with that sort of timing and squish

why wouldnt it be fun to mill with , please explain
Peter

 

[peter92]

it's been awhile but I think it was flat. the combustion chamber is as ugly as it gets. I don't know if you can make it that tight in stock form.

can you show the 757 cylinder so we can see what your talking about
Peter

 

[exSW]

Voila! I knew I had at apic.

 

[peter92]

View attachment 47989

Voila! I knew I had at apic.

thanks for finding that pic, so now why is it ugly , or it that just hard to mod
Peter

 

[tree monkey]

this is a 660, that's about as wide of a squish band as you can have without issue

this really has no squish band to speak of, it's all a dome with steeper angles then the piston. I think this is the worst head/ chamber design in the word of saws.

and the pic shows the 757 has a flange.

the saw I did was a work saw.