Echo 4920 Ported!! Can a Clamshell really make Big Gains??

[@CharlesBrisco]

You did great for a clam shell

[@MHolt3573]

What does the term "clam shell" mean?

[@benredmond8271]

Plastic 2 piece

[@Ecthelion_2nd]

The crankcase is a two piece, the crank bearings are sandwiched between both half’s. It’s a lot harder to cut the base of the cylinder and the squish.

[@mattfleming86]

I'll admit.. I have their 3510 for a pack-in / trail / brushing saw and have got my money's worth out of it several times over. I removed the dividers from the air intake side, ground on the dividing block to de-isolate the strato's some, and a healthy muffler mod. Haven't touched the actual cylinder. Super light. Great running saw for 35cc. I admire a tiny saw that I can bury the whole 16 in oak and it doesn't just flat out give up.

[@mikemckinney6058]

I did the same plus ported the cylinder on mine and was amazed. I had been running a .043 chain on it now it eats with a full chisel .050 love the 3510

[@mattfleming86]

@@mikemckinney6058 What sprockets interchange? I honestly wanted to swap mine out for 325 for smoothness on the whippy stuff. Mine tends to get used as a brush wacker a lot when I'm doing fencelines and 325 is smoother for that. Had a heck of a time finding someone who knows anything about what sprockets from other models fit it. Any leads/tips on porting? I have to break mine down to find a small air leak and give it another deep clean and i'm debating messing with it a little more. I've ran mine enough that it's time to break it down for the SECOND time to blow everything out. I've put a TON of hours on it. Love that little saw.

[@mikemckinney6058]

@@mattfleming86 I have googled myself silly trying to figure out what 1/4 pitch sprocket would interchange with it. I think the cs-355 will but not 100% on it. Monkeybeaver sales the kits. I’m gonna start ordering parts I’ll keep you updated.

[@mikemckinney6058]

@@mattfleming86 there’s a chevron shaped ridge in the exhaust port. I just took that out and port matched the gasket. On the intake side I knife edged where the ports come together.

[@mattfleming86]

@@mikemckinney6058 My hero. I opened the internal baffles up on mine (drilled some holes in the middle baffle plate) and swaged open the outer hole. I completely removed the deflector on the front. It's still not really loud. I remember looking at that protrusion/chevron and thinking "that's an EPA nubbin" 😂 I'll fool around with it. Thanks. A bunch.

[@stevenbrown1798]

I just got a 4920 last week really satisfied with it

[@williamwallace9620]

Love to see new Dyno Joe videos 👍

[@DaveyBlue32]

Damn Straight! You’re bottom transfer blend out was absolutely sweet! Those are some crazy looking ports stock??? Sweet little work saw!

[@bigfootandbananaman4746]

Wow that turned out great. I think it will be a good saw for their target market. I hope they come out with a larger version of the 4310.

[@aaronpowell4885]

Thanks for sharing👍🏻 definitely makes it a little sweeter!

[@oakiewoodsman]

Very cool to see you do this. Seems fairly stout! Thanks for the video

[@jerseyjoshua4818]

I really do like the way you set up the second camera for your videos. You're doing good things Joe, NOOOOOOICE Work! 🤌

[@dynojoemods2764]

Thanks so much!! Appreciate the feedback.

[@ragercrepair9301]

That's pretty awesome for what it is! Should be a good runner for sure once it's broken in!

[@tedneitzel]

I think it turned out great! Well done!

[@MrC9Oh3]

I just bought a 4920. Went in the store looking for a 590 but they didnt have it. Hope the 4920 holds up.

[@timrum7219]

Been looking for a new 50cc saw might have just helped me make my decision and you can't beat the price

[@Super-Dave-Outdoors]

Awesome! Thanks Joe!

[@TsunauticusIV]

Nice jump in power!

[@dirtytsfarm2141]

Nice work man

[@thegodfreyspecial423]

Have you played with any Stihl 291s? Super common "non-professional" saw - would be fun to see if there is any easy power in them.

[@dynojoemods2764]

Have not messed with any 291s. Did a 271, but 291 should be similar

[@jaydee2620]

If anything, they could’ve just changed the switch on the 4910. I think they decided we were getting to good of a deal on the 4910z glad I got one before they dry up soon.

[@crazyfeller5704]

Really good work- great improvement.

[@jasonlamar2053]

Nice gains Joe! If you keep dyno’ing and modifying Echo’s, maybe they’ll relent and start publishing hp ratings in the States, like they do in the UK in kw.

[@oliverm5sc]

Published hp numbers mean nothing, Stihl claimed 3.8 on the ms290 in real life it was more like 3.2

[@shawncaudill424]

Awesome video dam good work

[@bennyblanko3]

Thanks so much for doing this! I'm sure clamshell stratos aren't really your favorite. But, nice to know how you ported it, and what the results were. I could see what you did with the exhaust, and lower transfers. But, you didn't take the caps off, right? Because they are glued on so tight. Did you fill the outside with epoxy, and then reshape/raise the ports? Or, did you just raise them a little, without epoxy on the outside?

[@nseric1233]

Someone needs to start making slightly taller pistons for saws. This will get rid of the need to machine cylinders, you would mill the new piston until it fits just right instead.

[@haydenshores9943]

I really wanna try to port mine but ive never do e something like that before afraid im gonna completely screw up my piston and cylinder lol do you make any close ups of you honing it out?

[@sunbear1973]

Dang nice work on this one. 👍👍💪💪

[@justinweaver8107]

Pretty cool to see but still hate how they changed it 2 a cheaper grade saw in my opinion

[@richhoffman432]

Joe.....what would happen if you replaced the transfer caps with a flat piece of metal? Would it make things worse by slowing down the intake charge?

[@dynojoemods2764]

It would probably go backwards. Too many open cavities to disrupt the air flow.

[@Long_range.]

Wow. I’d love to see that cut

[@MrHangerone]

Great video as always, is possible too fit stihl 500i fuel injection to another chainsaw say a husqvarna 390xp? Cheers Kevin down under Australia

[@zack6892]

I've wondered the same for a while now except not so much the 500i setup since it is pretty restricted from stihl in what can be done with it. I have wondered how something like a lectron carb would do if retrofit to a chainsaw. They tend to be fairly universal in regards to the displacement range in which they will operate. It would be an interesting project trying to get it to mount though haha.

[@MrHangerone]

@zack6892 I Agree , it would be fun to see how good it would work out? Power!

[@gumboot65]

5 horse, that's impressive! Should pull a 24" bar with full skip chain just fine .

[@zack6892]

Well it sure sounds better that's for sure. Hard to beat the 4910 in that department though. In regards to performance though definitely some good results you do well with most of the saws you get into. Enough to commit to a clamshell saw though? I guess we'll see.

[@genefowler948]

Where can you get the after market air filter kit for the 4910 echo.?

[@dynojoemods2764]

Sometimes they are listed on ebay. I will see if I can find the link.

[@scieachainechainsaw4752]

Hello from Québec, how Much for ported a 4920

[@Billster1955]

Sweet

[@jasonlamar2053]

Nice gains! Did you have to go to a single ring piston on this like the other Echo 50cc models?

[@richevy5224]

Nice gains Joe. I'm basically ECHO illiterate but is it possible to put a 4910 coil on the 4920? Just thinking outloud.

[@dynojoemods2764]

Thank you They are a different style

[@jimholz1102]

Huge gains with just porting and no machine work! If someone can do this on their own it's a deal- if they have to pay someone to port it, just get a 550xp.

[@jeremythiel2550]

Need to do a cutting video

[@tantonrosencranz2718]

Good job

[@elespe8167]

Sold out😁,👍

[@jaydee2620]

Joe is it a plastic case ?? I assume it is ?

[@dynojoemods2764]

Yes plastic case

[@tomknapton5051]

Hi I'm thinking about buying a cs440 echo will it take a 24 inch bar or not

[@dynojoemods2764]

440 would be much better with an 18 inch max

[@AndyAlaska375]

Impressive gains for a clammy....im still gonna start hoarding 4910s😅

[@jensenwilliam5434]

Thank s

[@yankeedoodle7693]

nice work

[@jackpinesavageadventures3142]

👍🏻👏

[@mcpgame8940]

Price???

[@Goldm1ner]

calalog price 689 euros. taxes included.

[@jaminturner4585]

You need a longer bit on your cordless lol

[@rtoguidver3651]

I perfer Stihl but Echo is a good saw, and now even better.

[@madreamer]

Looks like a baby 7310

[@andersvilhelmsson2271]

Why are that saw called a clam shell..🤔🙂

[@RoyFabian]

If you look at the cylinder when he takes it apart, half the crankshaft journal is on the bottom of the cylinder, and the other half bolts to the bottom, like a big end cap. A non clam shell, the two case halves are pressed onto either side of the crankshaft and the cylinder bolts on top, like a motorcycle engine.

[@garengtutorial8923]

😮 keren bos mantap 👍

[@chriseller757]

All echos have limited coils

[@coolestguyontheplanet723]

Comment from me

[@diesel7903]

When you do this do you think the manufacturer is just being lazy.

[@dynojoemods2764]

No, it is all done for a reason. Emissions, noise, power etc.

[@diesel7903]

@@dynojoemods2764 that’s what I was thinking