Upper transfer angles

[jmssaws]

OK buds.

Drinking games are beginning. I'm out for the night.

Happy New Years to all!

Talk to you tomorrow al, happy new year everybody.

 

[mdavlee]

Have fun Al.

 

[mdavlee]

 

[Keith Gandy]

365?

 

[mdavlee]

365?

7900

 

[Stihlbro]

Happy New Year fellas! I'm at work till after 7am. I'll talk more on my picture later.

 

[mdavlee]

Happy new year friend.

 

[jmssaws]

Happy new year mike.

 

[drf256]

Happy New Years guys.

Now that we've establish that the factory (and some of us) open dual ports a bit earlier in the intake side, how do you make your markings to establish you goals?

I've used a ring and thin sharpie and just cut to the line on the exhaust side and all the way through the line on the intake side. I've noted a thin sharpie line to be about 2*.

I can see a more exact way being to cut 2 different pieces of card stock to different degrees, and then creat a slope of the difference. The stock would have to be recurred and flipped side to side.

So, how do you do it?

 

[mdavlee]

Eyeball mostly. I use card stock or business cards to set the height. I then compare to the card stock to see if it's straight or not.

 

[Redfin]

Morning. I use card stock also.

 

[drf256]

Any tricks on cutting the card stock, instead of multiple trial and errors?

I try to measure the ring through the exhaust port, and then cut the stock, but it can be frustrating.

I've taken a C-hair off of the card and changed timing by 4*.

It's amazing how little it takes.

Also, do you guys make studs for your saw bodies, or do you tighten the jug down each time?

 

[Keith Gandy]

Good example from the ole chimp!!

 

[mdavlee]

I measure with calipers and check and then use math. Mark it out with the calipers. I've not seen one that changed that much in that little. I don't work on 50cc very often. Usually 71cc is my minimum size. Half the time I just hold the just down by hand when I'm checking quick. I pull the rings so no resistance.

 

[Keith Gandy]

I push a ring up the bore and mark with a sharpie 1° less than my mark , to allow for chamfering and sanding

 

[Keith Gandy]

That card trick is really precise though but ill still mark a degree less and go shy and also reinstall cylinder several times to work up to my mark

 

[mdavlee]

Those cards have ported about 10 saws there. I throw them in and grind. Might have took an hour for the last 7900 for all the grinding.

 

[Redfin]

I push my ring up one degree lower, slide the caliper from sqish to bottom of ring, tighten caliper nut and mark the card with the caliper points.

 

[drf256]

What kind of caliper?

Mine won't fit in the bore. I usually port 44-48mm saws

I do have a depth mic

 

[mdavlee]

My digital dial calipers. Slide it to squish. Write that one down. Slide to exhaust port or transfers and log it. subtract what I want to raise and cut the card. I measure how far 10° right at exhaust opening on the piston. Works out pretty good. You can do it on the intake side for transfers as well. Mark 10° on the piston skirt and measure.