Adding A Reed Cage ?

[chy_farm]

Very cool.

Good evening Randy and thank you for this, glad if you have some information on this sort of boost!
Chy

 

[Mastermind]

Good evening Randy and thank you for this, glad if you have some information on this sort of boost!
Chy

I do not I'm afraid. I mostly just build newer work type saws. Sticking with what I know....

 

[Stihl working Hard]

I am trying another boost system for McCulloch 795 with a set of Honda reed cage and a pair of carbs. What I mean is to introduce the positive air pressure given by the flywheel fan into the boost port through this carb.

I will be glad if any guy has informative tips and appreciate it if he could share them, thanks.

This intake housing comes to the upper top of the motor where the blue arrow shows the flow of gas through another smaller carb.
View attachment 87401

The smaller carb in the pic below was originally installed on this 795, the same one on Super 797, but she was not budged as Super 795 though.
View attachment 87402
A nice video is posted from the Chainsawguy on this series;

.
The pair of the carbs come like this below;
View attachment 87403

View attachment 87404

Chy

You are definitely inventive chy I admire your efforts I hope you pull this off with great success my friend

 

[chy_farm]

I do not I'm afraid. I mostly just build newer work type saws. Sticking with what I know....

Thanks Randy!
Chy

 

[chy_farm]

You are definitely inventive chy I admire your efforts I hope you pull this off with great success my friend

Todd, that's too much for me. Thanks my friend!!
Chy

 

[Stihl working Hard]

Todd, that's too much for me. Thanks my friend!!
Chy

Well deserved my friend nothing ventured nothing gained,some of the best inventions around are done with perseverance like yours

 

[chy_farm]

Now it's time to think about the design!








Chy

 

[chy_farm]

A way to get the positive pressure led to this smaller carb may be one like this;

 

[chy_farm]

Haven't been here for long, too busy in my job,,,but this week was able to get some time to tinker her.
So tried a base plate for this big carb, and a joint part to the rear handle.

 

[chy_farm]

The TIG welder I got this summer does some job for her, yet seems too poor to pro's eyes, I know though lol.

 

[p61 western]

The TIG welder I got this summer does some job for her, yet seems too poor to pro's eyes, I know though lol.

View attachment 101182

View attachment 101183

View attachment 101184

View attachment 101185

View attachment 101186

It's looking good Chy. How are you doing?

 

[chy_farm]

It's looking good Chy. How are you doing?

Good morning Mike, thanks. TIG things are something I started only several months ago, so not so good, but at least a tad better than ever, lol. Am busy but not so bad, you seem doing good Mike!

 

[p61 western]

Good morning Mike, thanks. TIG things are something I started only several months ago, so not so good, but at least a tad better than ever, lol. Am busy but not so bad, you seem doing good Mike!

Yeah everything is good here. You will only get better and better with the tig in time.

 

[chy_farm]

Yeah everything is good here. You will only get better and better with the tig in time.

Thanks Mike, some progress here, tried for some mock-up with paper.








A rectangular box on this side is for micro-controller unit for ignition. May be I will minimize the size later.

 

[chy_farm]

A little progress!

 

[chy_farm]

Some more for today.

 

[Definitive Dave]

Progress is looking great!!
Are you going to run the carbs simultaneously or open the second only once the saw is up in The power band?
I ask because the programmable ignitions open a lot of fun possibilities I don’t ever see discussed on saw forums
Are you going to have a trigger/flywheel made or build your own by turning down a stock one and adding the triggers.
I’m envious of your fabrication skills.
Dave

 

[chy_farm]

Hi Dave, Merry Christmas to you and your family!!!

Progress is looking great!!
Are you going to run the carbs simultaneously or open the second only once the saw is up in The power band?------

Nice idea too, Dave! I have been thinking of opening the second carb all the time, but now your post gave me another thing to give deeper digging! Probably a trigger lever is needed for opening the second carb. May be intentionally I will open it, since some flow is needed for cooling the cylinder head.

As far the program I am now thinking one with nearly zero degree advance for higher spin than 12000 - 13000.

And yes I am going to fabricate a totally new one for this contraption, but only a question is if it goes good to her, my skill is not so very good as you imagine though! lol.
Here is an evidence that I am a novice welder and am always looking for better skills for my makes;
[Welding Aluminum with Oxy/Acetylene ??]

Thanks again.
Chy

 

[Definitive Dave]

Second carb - bored out with a trickle of nitrous, set to pop open at 90% throttle
No choke on carbs
Ignition set to retard until engine hits 4500 rpms and then advance quickly over a half second.
Several of the manufacturers of the program able ignitions offer lite weight flywheels as well.
Big saw with plenty of grunt doesn’t need the extra inertia of a flywheel
Cold start from the ground at a retarded ignition setting and the throttle pinned open.
As soon as it fires and hits 4500 the ignition advances as you move to the wood and as you peg the throttle...
Three seconds later the guy at the other end of the cant and all the spectators wonder in awe at wtf just happened.
When you are ready for a bar and chain for it let me know
Dave

 

[EvilRoySlade]

Dave I think you missed your true calling as a writer.