Saving an KS Non Decomp 262 Jug

[drf256]

question.... no damage to the plating at that heat level?

Nope. Zero.

Look at how I did it. I used big pieces of metal to radiate the heat away.

 

[295 tramp]

Nice job Al I thought I recognized that jug

 

[drf256]

Nice job Al I thought I recognized that jug

Yup.

I got two more here you'd recognize too.

Thanks again.

 

[Toad22t]

Very nice work Al! I'm going to be very proud to put this on my saw! I'm a welder of aluminum and stainless steel and appreciate the detail that you have did here.

Everything that I have heard about the KS cylinder is the port timing is is alot better then the the other's. Ported they come out the same just less grinding. I'm not a pro though so don't believe me.

 

[drf256]

It's coming along Adam.




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[Mattyo]

Morning doc....very nice

 

[drf256]

Morning Doc back atcha.

It's roughed in right now.

Gonna go with 103/120(f118)/75

This KS jug needs much less raising of the uppers than the last Mahle I rubbed.

 

[Mattyo]

Mm told me...don't add much intake....72 is good....fyi

Going back to sleep

 

[drf256]

I didn't at all any intentionally. I just squared the bottom. The center on the floor is untouched.

Gasket delete and .026 off base with a new meteor is giving me 74.5 on this jug. My last Mahle was more like 72 after the cut. So this KS had a lower intake to begin with.

Stock, these 262's only have around 12* of blowdown. Because of the lower intake and the material removed with the fingers, I'm keeping the transfers lower.

I also gave it a slightly flatter exhaust roof arc over stock. The arc is there, it's just a bit flatter to vent exhaust quicker before transfer opening.

I'm not sure yet if I should bring the transfers to 118 and the fingers to 116. Haven't decided.

 

[Toad22t]

It is looking very nice.

 

[czar800]

Al, very nice work!!

 

[Deets066]

I didn't at all any intentionally. I just squared the bottom. The center on the floor is untouched.

Gasket delete and .026 off base with a new meteor is giving me 74.5 on this jug. My last Mahle was more like 72 after the cut. So this KS had a lower intake to begin with.

Stock, these 262's only have around 12* of blowdown. Because of the lower intake and the material removed with the fingers, I'm keeping the transfers lower.

I also gave it a slightly flatter exhaust roof arc over stock. The arc is there, it's just a bit flatter to vent exhaust quicker before transfer opening.

I'm not sure yet if I should bring the transfers to 118 and the fingers to 116. Haven't decided.

Nice work AL. Them finners are lookin nice

 

[Redfin]

Al, I sanded squish to .018" and ended at 106/117/70. I took it to 103/117/74. It turned out a good runner.

 

[drf256]

Sounds Interesting.

I love this stuff.

 

[angelo c]

Doc

....be careful
...if you get too good youll have to quit your day job

no fret...Obamacare taking care of that already....

 

[Mattyo]

the best insurance on the planet is a toothbrush... don't let it sit on the counter.... you have to actually stick it in your mouth, even Obama can't do that for you hehe

 

[drf256]

This amphibious 262 jug is coming along. Almost ready for chamfers, sanding and polishing.

Now the CAD OCD sets in, and I measure every port for symmetry and possibly ruin the jug.

I did something different to the uppers this time. Can anyone spot it?




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[Sty57]

Looks really nice Al

 

[czar800]

This amphibious 262 jug is coming along. Almost ready for chamfers, sanding and polishing.

Now the CAD OCD sets in, and I measure every port for symmetry and possibly ruin the jug.

I did something different to the uppers this time. Can anyone spot it?

View attachment 10102View attachment 10103


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You didn't square up one side? The top picture looks like you blocked off the transfer.... I'm using my phone so it's kinda small.

 

[drf256]

I'm attempting a pseudo-Quad port on this saw.

I spent a bunch of time grinding the inside of the uppers. The entry angle is flat on the exhaust side and slightly ramps up as it approaches the intake side.

Unlike many saws (like the 026), this 262 has a nice fat fin on op of the exhaust part of the external upper tunnel. So you can grind away without fear of going through.

Most quad timings I've seen open the area over the exhaust part of the piston first. Also it's at a flatter angle of entry than the mains. I opened an exhaust lip 1* sooner to blow off the exhaust side of the piston crown first.

So the jug is now set at 103 ex, 117 upper exhaust lip, 118 mains and fingers at 115.

Flow inertia and direction should make the ex lip flow very little.

In my minds eye, I see a wider band of flow emanating from the uppers but with the same direction.

I aimed for "feathering" out the intake charge all around the intake side of the cylinder.

It may be a total dud, if so, it will go in the tub of shame. At least I got a few hours on mental therapy from the grinding.

If it work great, we all learned something.