STROKER 50cc Build!! More stroke more power?

[@andyjones6361]

Joe Dude you are a desperado!! You’ll be competitive!! It feels good to win!! Keep going!

[@treebender261]

You have changed the whole saw porting industry alot of big names were just woods porting now thay are having to learn what really makes saws run because loud mufflers and big chips are just not cutting it anymore I love the mad scientist mix and match this is so fun to watch

[@jamesh8136]

Great Vid Do both short and long.

[@andyjones6361]

You know I’d love to have 80cc power in a 50cc chassis. !

[@georgesmith5624]

Stihl 661 with 660 crank would love to see that

[@dynojoemods2764]

That one is in the works

[@georgesmith5624]

@Dyno Joe Mods yes if you need cases and crank IL send them from nz,best show on TV Joe thanks for spending your time showing what you do

[@mattfleming86]

😯 Your videos have been on absolute fire lately. There is absolutely nobody out there doing really cool content like this Joe. Previously you had to go 20 pages deep into some obscure thread on the forums and wade through foot-deep bs to find the good stuff. Dude I love this. Thank you.

[@HairlipButcher]

That's what u call a "sleeper". That things gonna hurt some feelers. Like A guy in a brand new mustang that gets beat by gramps Buick regal!👌💪🇺🇸

[@BlackDevill9]

Your a good craazy love your work!🤘New sub here ✌️

[@dynojoemods2764]

Welcome aboard!

[@TomMchainsaws]

I've done a stihl 036 with a 460 crank and 52mm sylinder👍 2mm spacer and did all grinding in the case by hand👌 Great videos! I like watching things like this!

[@dynojoemods2764]

Thanks 👍 That sounds like a fun project!

[@oldcodger1929]

Fun stuff Joe. Have a nice day.

[@cajun3197]

This one will be really cool to see

[@kellychase579]

Great video! The 4500 is one of my favorite little saws. Solid and rugged. Would love to see a 346 cylinder on one!

[@w6qd]

Red - I initially watched the video to see how you would split the case, and by God the husqvarna case splitter worked. I have a 4600 on the bench, AFWIW, my saw had a base cylinder gasket installed. Your video had me transfixed and learned more than I wanted LOL.

[@MrRmh3481]

Much Love Red. Nice to see how you use your tools.

[@dynojoemods2764]

Much appreciated

[@donjohnson9170]

Stoker mid big bore

[@nathanmcdonald1585]

Go extreme as you can go with it. Push it to the limits. I really like you shop.

[@nathanmcdonald1585]

I would think that machine crank might have a little too much stress on the rod. For an 80 or bigger. SCARY

[@dynojoemods2764]

That much thinning of the rod is a bit much but I do have room maxing out the case to leave more material.

[@nathanmcdonald1585]

Wouldn't that make more case pressure going as big as possible. Would that's be a small gain or considerable gain.

[@Ceemysix]

In many saw applications other than a limbing saw, I don’t understand why chainsaw engineers have chosen such oversquare bore/stroke configurations. I’m sure it’s about obtaining peak rpm and that elusive HP number. Trouble is, a saw doesn’t live at peak HP RPM in the big wood. They live in the 10,000rpm regime. If you look at the bore/stroke ratios of older 2 stroke motocross bikes, they ran a lot closer to square bore/stroke ratios usually favoring slightly oversquare to keep good overrev. Most chainsaws I’m familiar with unless they are ported extensively with a lot of machining will fall off the power curve easily making that peak HP number irrelevant. My point is if you can widen the peak power curve and build more torque in the 9000-11000rpm range, you’ll get a faster cutting saw. Longer stroke ratios will help provide that. Tuning your cutting equipment to this type of power curve is just as important, I;e taking rakers down more.

[@dynojoemods2764]

Most of the reason is packaging. Easier to fit a larger bore and shorter stroke in a small saw. Larger stroke takes bigger cases and cranks. And it all adds up to extra size/weight

[@RyanMcIntyre]

You’re also applying 4-stroke results (in reference to bore/stroke ratio) to a two-stroke and the concepts aren’t consistent. In a 4t, larger overbore engines favor RPM due to valve surface area more than any one factor. Richard Holdener proved that all things being equal, longer stroke always makes more torque and Hp across the board without a loss of RPM capability. What that all means is that the engine’s RPM is limited by air getting in and out to a much higher degree than it is by stroke ratio. A 2t works by uncovering ports in the cylinder wall, a longer stroke would theoretically uncover larger ports per degree of timing, but you run into terminal maximum piston acceleration being your RPM limiting factor, which is related to the stroke ratio, but ultimately determined by stroke length - longer strokes means faster piston speeds, meaning you’re closer to the unsafe limits of that design. And packaging.

[@Ceemysix]

@@RyanMcIntyre I guess I can relate to that statement. Good information.

[@andyjones6361]

Stroke it Joe. Like you said the transfer is open longer. And longer stroke length makes more compression !! It takes both to make power.

[@jasonreese4824]

Can you slev the jug and rebor and recut your intake and exhaust ports in know jug slev to get your know bor

[@tylerheard1279]

I vote 36mm stroke. Also the quad transfers would be nice

[@dgoodman1484]

Dang, and I’d be excited about just having full carb adjustment again on a saw! lol Pretty impressive 👍🏼

[@erichaymore5902]

I don't know but that looks like a lot of fun.

[@Bigcheif360]

Going to like this build. More relatable for me. Small cc big power.

[@brandonsmith3447]

I know this is the not anything pertaining new saw power vs broken in saw power but has a video been sone on that yet?

[@dynojoemods2764]

It was done on 2 different saws ms400c about a year back. Also tried the foam air filters on them too.

[@richfreireich4528]

That looks super fun Joe, it's also nice to know that the husky case splitter will work on different saw brands

[@jasonreese4824]

Hay I got a question do you own a mechanic show can do a tour of your show that would be cool if you want if you don't want to I understand to

[@joutdoorsmen23]

You Got It Going On Joe I’m thinking short stork but really doesn’t matter either way it’s going to be fast!!!!!!

[@Hambonebodi]

Longer Stroke it and sleeve it .

[@nseric1233]

The 34mm stroke crank out of a 5800 clone saw like the joncutter 5800 or supmix 6200 might fit in there without machine work The 550xp is 43 bore x 34 stroke and they rip

[@dynojoemods2764]

Will have to get one ordered and check it out Thank you

[@jensenwilliam5434]

Thank you Joe

[@EcSsAwS]

K’nex. Was my shit as a child. Amazed you said that. What about steel tec. Remember those? All metal flat pieces nuts bolts all kinds of choking hazards

[@dynojoemods2764]

Yep. Nuts/bolts and the flat metal pieces

[@troy3052]

A million thumbs up 👍

[@modarkthemauler]

What about a Shindaiwa 452s cylinder, that has a Ø41.7 mm bore?

[@dynojoemods2764]

That puts it slightly over the limit.

[@dgoodman1484]

Slightly over sounds just right for a race saw! 😁👍🏼

[@gasaxecustomsaws]

Absolutely loving these videos... Chainsaws are like legos! (great analogy) Would you do a video of any crankshaft machining? I want to switch a coarse thread husky 61 crank to a fine thread so I can use a better clutch. That bungee on the crank was brilliant btw. Simple solutions are always better. Keep'em coming!

[@pastormike5054]

I was thinking of doing something like that to my husky 50👍

[@redtiller1975]

I'd like to see a stroker build. Thanks

[@Leave_Nothing_Stock]

Since when do 3 cube race saws have to be 3 cubes or less? I don't get into racing because out here it's all about who can cheat the most.

[@dynojoemods2764]

Well.... it's no fun to be the fastest by a long shot, have to keep it close. I plan to stay under the cube limits lol

[@Leave_Nothing_Stock]

@@dynojoemods2764 I've heard some places tear down the winners saws to confirm they're under the limits. That I could get behind

[@dynojoemods2764]

@@Leave_Nothing_Stock I have heard the same. I don't see anything wrong with that.

[@Leave_Nothing_Stock]

I'm sure there's a few 100cc+ 5 cube racers out there

[@dynojoemods2764]

@@Leave_Nothing_Stock That would be a monster 5 cube lol

[@romanchepyliuk8710]

Дуже цікаво , но нічого не розумію шо говориш men.

[@dynojoemods2764]

Sorry, just showing installation of a larger stroke crankshaft.

[@TurboDog73TX]

The 80cc build sounds awesome on paper, however I would be concerned that the clutch assembly may not be happy with hot 80cc power levels..?

[@dynojoemods2764]

One way to find out.... but they do have a pretty decent size clutch.

[@Fueler]

Just wondering you the clamshell didn’t work out? I really enjoyed your work on that

[@DaveyBlue32]

Gross looking snot in the oil tank! LMFFAO! She’s a cute little baby echo… I’ve got to finish that 4600 project

[@jackpinesavageadventures3142]

👍🏻👏

[@markcdeyoung3118]

I had way more fun than you did

[@ronaldmasterbud1551]

36 X 48 mm If You Could Find One Of THE REALLY GOOD Husky 262xp Top End's !!! Then Ask The Banana Man For His VoDoo Secrets for 262xp.

[@ronaldmasterbud1551]

P.S. Because We Don't Rent Pigs !!!