Installed a Bing 48 carb on my 036

[drf256]

Any measurements on those carb openings Mike?

 

[Backtroller]

Mike that is freaking awesome!

What is a Bing 48 off of? I never had the pleasure of owning one.

 

[Canadian farm boy]

Any measurements on those carb openings Mike?

I'll get some measurements hopefully tonight. I'm not sure if I can measure the Venturi in the Bing carb.

 

[Canadian farm boy]

Mike that is freaking awesome!

What is a Bing 48 off of? I never had the pleasure of owning one.

This particular Bing 48 carb was originally on a
038 super. The 038 came a couple different carbs. Bing, tillotson and I believe Zama carbs, maybe more. The Bing carb just happened to be what I had.

 

[lwhaples]

Amazed in the results. Thanks for posting up your findings. Gives me something to look out for.Bing!

 

[Backtroller]

Just did a quick eBay search and a Bing 48 looks pretty elusive. Might be easier to find an old junk 038 and steal the carb off of it.

 

[Milkman31]

Here my 036 with all put together. I'd still like to install a cover to keep all the saw dust and junk out of the carb box but for now it's ready to goView attachment 37035View attachment 37036

That car though!!!

 

[dall]

lol your not getting mine

 

[Canadian farm boy]

I took a couple measurements of the carbs. The inlets and outlets of the carbs are virtually identical. I don't have a good way to measure the Venturi in the Bing carb due to its odd shape. The Venturi in the Bing carb does appear to be bigger then the Venturi in the Zama. The Bing carb came off a bigger saw so I'm gonna guess that it is also jetted a touch bigger.

 

[paragonbuilder]

I took a couple measurements of the carbs. The inlets and outlets of the carbs are virtually identical. I don't have a good way to measure the Venturi in the Bing carb due to its odd shape. The Venturi in the Bing carb does appear to be bigger then the Venturi in the Zama. The Bing carb came off a bigger saw so I'm gonna guess that it is also jetted a touch bigger.View attachment 37041

That's very interesting! So it looks like the saw needed more midrange fuel like @Poleman does on the dolmars. Which leads me to believe the same results could be had by modding the existing carb.


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[Canadian farm boy]

That's very interesting! So it looks like the saw needed more midrange fuel like @Poleman does on the dolmars. Which leads me to believe the same results could be had by modding the existing carb.


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I believe your probably right. I think some of my gains here are from the larger 038 intake tube as well as from the v stack.

 

[Backtroller]

You are running the mesh filter on the 036 right?

We should try to get Rich to play with one (if he has not already). Rich has really worked his magic on two of my Dolmar carbs.

 

[Canadian farm boy]

My 036 had the metal mesh filter on it when I had the Zama carb on it. I can still run the mesh filter on the Bing carb if I want. If I put the mesh filter back on I can also put the air filter cover back on. The only problem then would be that it wouldn't have a choke. It's not really a huge problem but it is nice having a working choke.

 

[huskihl]

Mike,
Most of your gains are at high rpm. I'm thinking the larger venturi, larger boot, and lack of a choke shaft are the cause of your added power. The jetting at that rpm I believe is largely controlled by the H. I'd think off idle/lower rpm would be more enhanced by the larger jetting in the bing. Looks like I may have to go digging for more in mine. Maybe bore my venturi slightly and use an 038 boot. Thanks for posting

 

[drf256]

I think there will be even more gains with a higher intake floor and the 038 boot.

 

[huskihl]

I think there will be even more gains with a higher intake floor and the 038 boot.

JB Weld to the rescue............again


On 2nd thought, when I dug back into my 036 earlier this spring, I believe I epoxied it back up to 75 or 76°

 

[Canadian farm boy]

I'd love to see what you guys come up with. I won't touch the beautiful port work that's been done to my saw.

 

[paragonbuilder]

Mike, if you have time it would be great to see one piece at a time changed to see if you can pinpoint if there is one variable making the difference or a combination of them


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[Backtroller]

That's why I was so excited that Mike was going to try this out. Having a spare handle and being able to modify it was a great idea. It was very cool to see what Al's porting can do without the limitations of the 036 boot and a better flowing carb.

I was too chicken to play with mine from @drf255 Mine will stay as it left New York.

 

[Canadian farm boy]

Mike, if you have time it would be great to see one piece at a time changed to see if you can pinpoint if there is one variable making the difference or a combination of them


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I'll see what I can do.

In what order do you guys think I should swap things out?