Porting Stihl 038 - The intake hump???

[Mastermind]

You can always go back in if you feel like it needs more intake. I like that you had a reason for leaving it where it was. Hard to argue with that.

 

[Brewz]

Ha ha, I wouldn't call it a reason, more of a hunch/guess.

How would one normally know if it needs more intake?

I am still learning how to read the saw for what it needs

 

[Mastermind]

I am still learning how to read the saw for what it needs

Me too. I sometimes add a couple of degrees....if that makes a gain, then I add a couple more. Trial and error is really all that works.

 

[Brewz]

It's coming together nice.
I went all Chinese on the tank handle, brake handle and carb and I must say fit and Finnish is excellent

 

[Brewz]

Compression is spot on where I wanted it at 180 psi cold.



Now to mod the muffler

 

[Brewz]

Done.





Runs great, really snappy and sounds good with the baffle gone and muffler ports opened up.

Only problem is the butterfly on the Chinese carbs doesn't seal properly when closed so will need a bit of work to get it to idle under 3000 rpm

Considering it's lucky to have a dozen tanks of fuel through it, has had a tree dropped on it, has sat and rotted in the weather for several years and only is now fully operational again for $200 in parts, I'm calling this a win.

I might have a go at rebuilding the bing but it's a bit of a mess

 

[Brewz]

Running 15000 rpm

It's gunna cut like a saw possessed

 

[Mastermind]

You might be able to loosen the throttle plate screw, and adjust the plate to make it seal better.

 

[Brewz]

You might be able to loosen the throttle plate screw, and adjust the plate to make it seal better.

I tried that.... didnt help
I fitted the BIng carn butterfly to the Chinese carb and it seals perfect and allows me to tune the saw.
The internals of the bing carb were all corroded so I just used the butterfly.

 

[Mastermind]

I tried that.... didnt help
I fitted the BIng carn butterfly to the Chinese carb and it seals perfect and allows me to tune the saw.
The internals of the bing carb were all corroded so I just used the butterfly.

Ah......smart cookie.

 

[Duane(Pa)]

Running 15000 rpm

It's gunna cut like a saw possessed

Like you said a touch lean, but sounds good. Really drowns out the ac/dc in the background...

 

[Brewz]

Yeah she sings a bit louder than Bon Scott

 

[drf256]

Yeah she sings a bit louder than Bon Scott

Nothing does.

Think that saw will meet him someday.

 

[Brewz]

Nothing does.

Think that saw will meet him someday.

I recon she has a few tanks of fuel left in her before she goes.

 

[Duane(Pa)]

Bear with me kids, I kind of have a love affair going on here.

 

[Mastermind]

Bear with me kids, I kind of have a love affair going on here.

I'm pretty impressed with that saw. I bet the exhaust is at 95° or so.

 

[Brewz]

I am itching to get the one I built and ported into some timber!!!

 

[PA Dan]

Bear with me kids, I kind of have a love affair going on here.

Awesome sounding saw Duane!

 

[Duane(Pa)]

I'm pretty impressed with that saw. I bet the exhaust is at 95° or so.

Me too Randy!

Thanks for all the help you have given me through the years ...

 

[Mastermind]

Me too Randy!

Thanks for all the help you have given me through the years ...

The relationship has been reciprocal my friend. You have helped me as well.