Question for AlSmith...

[weimedog]

Got a goofy request...I gave this friend an old 032 Stihl to play with...so he took down to the cases and has started to build it up with new seals & stuff....I have my 455 Husqvarna Rancher. He wants me to try and build that 032 to where it can cut faster than my 55cc husqvarna 455...think its possible? If so where would you focus? The little carb on the 032 seems to be a big limiting factor! I know..for the time spent i could build a really capable 272...365...372 etc.

[Al_Smith]

Any thing is possible ,I've got a 70 cc Mac 6-10 that runs out at 15,600 .  ;D

As to the 032 I've only ever seen one in my life and it in the dead pile at a Stihl dealers .I'm thinking those are horizontal cylinder maybe ?? Might be back tilt vertical but something is odd about it ,forgot what though . ???

I guess as far as tweeking one you never know until you try ,go for it .

[weimedog]

It tilts back some...more modern than the horizontal pistons. It actually has porting that looks along the same configuration & generation as those 200 series/600 series Husqvarna/Jonsereds...Well build little monster. Its just got this tiny carb! How hard it it to increase the carb ID? They obviously aren't like the Mikuni/Bing/Delorto ventry style carbs from my past. Has a large an for a muffler...easy to mod. Has more transfer area than you would expect...looks like there is potential in there if I can work around the tiny carburetor! Like a basket ball player wanabe with tiny hands!

[Al_Smith]

I suppose you could hang a bigger carb on it .Keep in mind which I'm sure you already know it would do little good unless you have enough intake size .

I've got the IPL in the big book .Let me take a peek about that carb and get back .

[Sawz all]

There should be a forum "Question for Al Smith"...lol...
I call on Al every now and again and I'm sure I'm not the only...

Kevin

[Al_Smith]

I took a look see and the saw in question  lists that carb as a Tilley HU 51 which I think is the same carb a Mac PM 610 uses .If I'm not mistaken a Tilley HS might have the same bolt pattern but I'm not sure .

I've got a Tillotson book so in the morning I'll dig it out and check the bolt pattern and also see if the HU had a larger venturi size than the 51 model,they often did .I do know the HS had several sizes .

Then again if an HS would fit then also would a Walbro ,maybe even a Bing for all I know .

That saw is only a fuzz over a 3 cuber so you can't get too carried away with it .Interesting  though,three ignition systems .Straight solid state .Solid state with a trigger and points  type .

[weimedog]

There should be a forum "Question for Al Smith"...lol...
I call on Al every now and again and I'm sure I'm not the only...

Kevin

yup...yet more true knowledge!

[weimedog]

That saw is only a fuzz over a 3 cuber so you can't get too carried away with it .Interesting  though,three ignition systems .Straight solid state .Solid state with a trigger and points  type .

My target (The challenge) is a 455 Rancher...55cc. first generation strato saw. Stihls seemed to be ahead of there time in those years....maybe hope.

[Al_Smith]

Well like I said you never know until you try . I never intended the Rocky 038 Mag would cut with a stock 066 over the blocks but it will ---some times . ;)

All BS ( previously known as camal dung ) aside it's kind of fun just to see what you can make them do .There's worse things you can spend time on .

[Al_Smith]

I couldn't find the bolt spread on the HU carb nor the HS .This info I did find though .

The HU 51 is 1/2" venturi size .The 44a HU is 9/16 and the 19B,33c ,and 37a are all 15/16" which should be large enough I would think .The 37a evidently was used on a Husky 140  whatever that is .Not real savvy on Husky stuff ya know . ;)

[weimedog]

wow...thank you! I would even know how to get that info! I have a box full of Tillotsons...maybe I can rummage through and find something..

[Al_Smith]

I've got the book but it doesn't cover every thing . I'm a thinken I saw a Tilley spread sheet some place on the net once that gave the sizes . I'll give it a Googling in a short and see what pops up .

[HolmenTree]

 Tilly HU, HK and  HS have the same approx. 1 1/4" bolt pattern along with the Walbro WA WT HD WJ  . So with a few mods the carbs can be swapped on the 032 . Look for a HS with the larger 11/16" venturi and a shy over 13/16" throttle bore. You will need the larger intake manifold ring from a larger Stihl to match that too and a little grinding to make the tank housing hole a little larger for that ring also. You can further bore out the HS venturi with a 25/32" reamer but if your HS only has the high speed atomizer screen and not a brass nozzel , [HS has either style] then a nozzel will have to be installed because the screen seat will be gone after boring. Tillotson Part #363-514 for the nozzle.Hole for the nozzle is drilled with a#2 bit.
Now to match the little 032 with this carb then porting, raise compression and muffler mod will have to be done. Good luck.


Willard 8)

[Cut4fun]

Got a 066 carb here and a HS bigger husky carb  that can flow 30% setting on shelf you can try  ;). Not 30% ethanol either.  :D

[HolmenTree]

yes the 064-066 Walbro WJ would be a good choice [already has the nozzle]  can still be reamed 25/32". To be honest I don't think the reaming will be needed for the 032, but I can see the 272XP will need it. :D

Willard.

[Saw Dr.]

I am not Al, but I have seen pics of 031/032 saws in racing trim before the more modern stuff was available.  I have one on my bench right now that pretty much took up residence here when the ubiquitous "no spark" condition was discovered.  Carb is kinda small, but it has the choke in the air filter.  That will open up a ton of options and still have the choke function like stock.  I would use a larger diameter intake, but I don't have the original off mine yet to compare.  Maybe an 038 or 044 would work?  045/056 was the same basic design, so maybe you could try one of those.  Good luck.  I think you can get that 032 to outgun the 455 pretty easily.  Maybe a little better port timing and crank the compression to it.  Bolt-on cylinder makes that nice and easy.

[weimedog]

I'll take pics later..right now I have gutted the muffler and will braze in a tube..I have 3/4 but that seems to be a bit much so Ill go look for something a little smaller at TSC...the ports look...like a 1980 generation saw! Think I'll open up the bottom of the transfers and do the standard widening routine on exhaust & intake....open up the intake and put on a little larger carb...we will see. My Jred 920 will come first.

Thanks for the insight!

[Al_Smith]

I've never been inside one let alone run one so I'm just guessing .It would be my assumption they would be ported pretty much like a standard Stihl meaning a single tunnel transfer ? If so it could benefit with a little widdening of the uppers back towards the intake side .Not so much that  you'd loose velocity but enough to make a cleaner sweep of the back side of the cylinder . Just a guess on my part without seeing it .

Caution though because if the ring end placement is again like a normal Stihl you don't have a whole lot of room lest you run the risk of snagging a ring end .That would ruin your day,not good .