@HayChaffandSawdust1 I believe there's definitely potential for more power... but, at what expense? Mechanical actuation? Electrical acuation... what's the added weight? 2stroke stuffing played around with "similar" exhaust stuff but then again, they weren't little chainsaws... someone could make a 4 stroke chainsaw... but, I betcha that sucker would weigh more than most would want to carry around.
@@HayChaffandSawdust1 yessir! I’m still mulling it over in my cranium exactly how to do it “live action”but the CONCEPT itself should work. I was just going to use it with the standard piston port in the exhaust ONLY. A sliding Guillotine-that can alter the exhaust timing in real time / live action depending on load. Right now we are “limited” to X exhaust height and everything is a compromise from there. This here apparatus won’t give more peak power necessarily, that’ll be set by the exhaust height. What is will do is to “thicken” your low-mid range by “foolin” the engine into making more torque when the guillotine is down thus giving a longer effective power stroke. It’s no problem to rig up with a servo motor and an external power source. To get it to run OFF the engine , live action , rpm is the head scratcher 😉
@fabzacres-blackcat the timing, speed, and finding the components to meet such requirements is a bit hefty task. It's probably impractical... but, that's what people said about my 94cc 460. 🤷♂️ lol. I don't care about excessive chain speeds, I do care about being able to lean on a saw and let it eat... hobs of torque with good chain speed is what I'm after.
@@RichFife Oh, I agree Rich! I build WAAAY more stuff in my head than I build on the bench... just like my pie-in-the-sky wish of fitting reeds in a saw's already-there transfers. There's be so many losses (monetary and flow) associated with it!!! I don't remember which Two Stroke Stuffing episode that it was that he was messing with variable exhaust; I probably missed it; last I knew, he was using a rotary valve.
@ Fabz, I reckon there's a jillion ways to take the pelt off the puddy, but my mind went straight to a vacuum servo (like vacuum advance); of course, that would add more case volume and it may not like the ever-changing pressures in the crank case... an in-line accumulator could smooth that out and lower the gain in case volume... never seen a chainsaw with a side car though. 😉 I sure do like a good thought/problem upon which to work though!!... keeps the ol grey matter from coagulating!!
I'm 8-1/2 minutes in and I'm waiting for Fabz to get his point across. Fabz, put the stick down and leave that horse alone... spit it out and put that Dr Pepper away. We get it, after the upper ring passes the exhaust roof, it "seals" and it builds pressure. 😂 Dynamic compression Static Compression Now let's talk about exhaust roof degrees vs compression results And then Let's talk about Blowdown and what you can achieve with little or a lot of blowdown. 😉 I like the generic numbers at the end... by using that formula... how long should the bearings last if my saw is at 205# of compression. Just food for thought, you're missing huuuuge fudge factors. But, I'm no engineering wiz... I'm just a guy from the sticks. Lol. Ring life = Years. IF operators take care of their saws... Bearing Life = have yet to see statistics or data on compression vs bearing failures in chainsaws. As a matter of fact, I'd say most bearing failures are more likely to fail due to poor oil/gas, failed crank seals, poor saw/chain maintenance... we already know about defective bearings and/or poorly engineered bearings... Hard to Pull = That's why the manufacturers install decompression valves. Be smarter than ignorance and use whay they give you. An old man isn't going to want a ported saw... the typical home owner wouldn't have a need for a ported saw... the occasional tree feller/firewood guy might, loggers like fast powerful saws that cut through the wood faster than oem... and they're ok will having the saw gone through every 3 to 4 to 5 years... that's whay they want, that's what they like and they don't mind paying porters for performance gains. More heat: I agree with this to a degree 😉 getting the heat out is big, mufflers are a huge factor with keeping heat, airflow across the fins is huge... thay goes back to the operator and how they maintenance their equipment... now, with an excessive amount of compression you'll have way more heat saturation and you will get tuning issues... I Typically run my saws between 185 - 205psi and I have yet to see anything remotely close to what you're saying... You also said the Stihl 044s were a great saw and they were around 180psi... they last years and years... shit, there are guys who still run their 044s over this way... and if what you say is true... then this wouldn't be the case... some of the 371s came from the factory woth higher compression... some are still running today... just these two saws, popular ones at that debunk most of what you say. You have some truth in whay you say but you inject a lot of your own bs into it. 🤷♂️ Please break down how you got your 4-7% gains after porting and machining... I'm genuinely interested on how you came to that % range in gain.
I do like the fact that that you're researching and trying to prove your stance/points... even if it's not to learn but to try and prove others wrong... hey, to each their own... if that puts wind in your sails... keep blowing and you'll find your destination... which is better than most.
@@RichFifeI’m only interested in knowledge - not proving anyone wrong (tho that is a side effect of said knowledge) … You asked , and I delivered the formula and YOU can do all the necessary calculations at your leisure. If you honestly STILL believe (even after being shown the formula) that taking a stock saw 150psi saw and jacking it up to 210psi is going to have NO EFFECT on bearing life (and all the other associated issues I showed in this video) then I say you are a fool! You can make the argument that a coin 🪙 dropped from 6ft will never hit the ground for first it must fall half the distance (rinse/repeat) however everyone knows this is a bullshit argument. You want to build hi comp machined saws then have at it , no one is stopping you - but You need to stop with the nonsense that they ALL HAVE to be built THAT way - it’s complete nonsense! There is no “free lunch” Mr. Fife , and anytime you put additional stress on components those components WILL FALL sooner than later! Simple physics than cannot be argued! Hey whatever, do YOUR WAY ! I DONT CARE 😂
@fabzacres-blackcat 🥱 🥱 🥱 😴 😴 😴 Do you honestly think that formula is accurate? C'mon man... like said before... fudge factors aren't included. Even in a perfect world/controlled environment, you won't get that formula to consistently repeat... Like I also said, some of the best saws ever made had higher compression, and they lasted years. Some are still running today, which is proof that not all things are set in stone... but, eat your choclate pudding and drink your Dr pecker. You state the obvious and you try to convince others that we disagree with the obvious... when in reality there is a spectrum and we don't only focus on the the far ends of the spectrum, we take into consideration all of the variables that fall between the two opposing sides. I'll ask again, if that formula is 100% accurate how do you have saws running 20+ years later? Some still on the job sites others have been reduced to firewood saws... c'mon man, I gave you an easy escape. Take the bait. Lmao
Rotax wouldve never p*ssed with a reed or VET if they had gotten into variable vanes on that intake charger. Or cvt driven the intake charger. Maybe im stupid, and far off the topic here.
@@fabzacres-blackcat not an a piston ported engine at all. Only way to change compression is transfer height and or exhaust roof as far as something that is variable and highly debated already.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
I an anxious to see protype VET working; could be like vacuum advance for timing; would work great with reed valves in the transfers!
@HayChaffandSawdust1 I believe there's definitely potential for more power... but, at what expense? Mechanical actuation? Electrical acuation... what's the added weight?
2stroke stuffing played around with "similar" exhaust stuff but then again, they weren't little chainsaws... someone could make a 4 stroke chainsaw... but, I betcha that sucker would weigh more than most would want to carry around.
@@HayChaffandSawdust1 yessir! I’m still mulling it over in my cranium exactly how to do it “live action”but the CONCEPT itself should work. I was just going to use it with the standard piston port in the exhaust ONLY. A sliding Guillotine-that can alter the exhaust timing in real time / live action depending on load. Right now we are “limited” to X exhaust height and everything is a compromise from there. This here apparatus won’t give more peak power necessarily, that’ll be set by the exhaust height. What is will do is to “thicken” your low-mid range by “foolin” the engine into making more torque when the guillotine is down thus giving a longer effective power stroke. It’s no problem to rig up with a servo motor and an external power source. To get it to run OFF the engine , live action , rpm is the head scratcher 😉
@fabzacres-blackcat the timing, speed, and finding the components to meet such requirements is a bit hefty task. It's probably impractical... but, that's what people said about my 94cc 460. 🤷♂️ lol.
I don't care about excessive chain speeds, I do care about being able to lean on a saw and let it eat... hobs of torque with good chain speed is what I'm after.
@@RichFife Oh, I agree Rich! I build WAAAY more stuff in my head than I build on the bench... just like my pie-in-the-sky wish of fitting reeds in a saw's already-there transfers. There's be so many losses (monetary and flow) associated with it!!! I don't remember which Two Stroke Stuffing episode that it was that he was messing with variable exhaust; I probably missed it; last I knew, he was using a rotary valve.
@ Fabz, I reckon there's a jillion ways to take the pelt off the puddy, but my mind went straight to a vacuum servo (like vacuum advance); of course, that would add more case volume and it may not like the ever-changing pressures in the crank case... an in-line accumulator could smooth that out and lower the gain in case volume... never seen a chainsaw with a side car though. 😉 I sure do like a good thought/problem upon which to work though!!... keeps the ol grey matter from coagulating!!
Listen up Mr. Fife 😂
I'm 8-1/2 minutes in and I'm waiting for Fabz to get his point across. Fabz, put the stick down and leave that horse alone... spit it out and put that Dr Pepper away.
We get it, after the upper ring passes the exhaust roof, it "seals" and it builds pressure. 😂
Dynamic compression
Static Compression
Now let's talk about exhaust roof degrees vs compression results
And then Let's talk about Blowdown and what you can achieve with little or a lot of blowdown. 😉
I like the generic numbers at the end... by using that formula... how long should the bearings last if my saw is at 205# of compression.
Just food for thought, you're missing huuuuge fudge factors. But, I'm no engineering wiz... I'm just a guy from the sticks. Lol.
Ring life = Years. IF operators take care of their saws...
Bearing Life = have yet to see statistics or data on compression vs bearing failures in chainsaws. As a matter of fact, I'd say most bearing failures are more likely to fail due to poor oil/gas, failed crank seals, poor saw/chain maintenance... we already know about defective bearings and/or poorly engineered bearings...
Hard to Pull = That's why the manufacturers install decompression valves. Be smarter than ignorance and use whay they give you. An old man isn't going to want a ported saw... the typical home owner wouldn't have a need for a ported saw... the occasional tree feller/firewood guy might, loggers like fast powerful saws that cut through the wood faster than oem... and they're ok will having the saw gone through every 3 to 4 to 5 years... that's whay they want, that's what they like and they don't mind paying porters for performance gains.
More heat: I agree with this to a degree 😉 getting the heat out is big, mufflers are a huge factor with keeping heat, airflow across the fins is huge... thay goes back to the operator and how they maintenance their equipment... now, with an excessive amount of compression you'll have way more heat saturation and you will get tuning issues... I Typically run my saws between 185 - 205psi and I have yet to see anything remotely close to what you're saying...
You also said the Stihl 044s were a great saw and they were around 180psi... they last years and years... shit, there are guys who still run their 044s over this way... and if what you say is true... then this wouldn't be the case... some of the 371s came from the factory woth higher compression... some are still running today... just these two saws, popular ones at that debunk most of what you say. You have some truth in whay you say but you inject a lot of your own bs into it. 🤷♂️
Please break down how you got your 4-7% gains after porting and machining... I'm genuinely interested on how you came to that % range in gain.
I do like the fact that that you're researching and trying to prove your stance/points... even if it's not to learn but to try and prove others wrong... hey, to each their own... if that puts wind in your sails... keep blowing and you'll find your destination... which is better than most.
@@RichFifeI’m only interested in knowledge - not proving anyone wrong (tho that is a side effect of said knowledge) … You asked , and I delivered the formula and YOU can do all the necessary calculations at your leisure. If you honestly STILL believe (even after being shown the formula) that taking a stock saw 150psi saw and jacking it up to 210psi is going to have NO EFFECT on bearing life (and all the other associated issues I showed in this video) then I say you are a fool! You can make the argument that a coin 🪙 dropped from 6ft will never hit the ground for first it must fall half the distance (rinse/repeat) however everyone knows this is a bullshit argument. You want to build hi comp machined saws then have at it , no one is stopping you - but You need to stop with the nonsense that they ALL HAVE to be built THAT way - it’s complete nonsense! There is no “free lunch” Mr. Fife , and anytime you put additional stress on components those components WILL FALL sooner than later! Simple physics than cannot be argued! Hey whatever, do YOUR WAY ! I DONT CARE 😂
@fabzacres-blackcat 🥱 🥱 🥱 😴 😴 😴
Do you honestly think that formula is accurate? C'mon man... like said before... fudge factors aren't included.
Even in a perfect world/controlled environment, you won't get that formula to consistently repeat...
Like I also said, some of the best saws ever made had higher compression, and they lasted years. Some are still running today, which is proof that not all things are set in stone... but, eat your choclate pudding and drink your Dr pecker. You state the obvious and you try to convince others that we disagree with the obvious... when in reality there is a spectrum and we don't only focus on the the far ends of the spectrum, we take into consideration all of the variables that fall between the two opposing sides.
I'll ask again, if that formula is 100% accurate how do you have saws running 20+ years later? Some still on the job sites others have been reduced to firewood saws... c'mon man, I gave you an easy escape. Take the bait. Lmao
@ He’s a Fifer through and through! Never gives credit when credit is due ! 🤣😂🤣😉😎🐍😃💯👍
Rotax wouldve never p*ssed with a reed or VET if they had gotten into variable vanes on that intake charger. Or cvt driven the intake charger.
Maybe im stupid, and far off the topic here.
Clueless you just confused everyone
@@steppoffaith8426 haha 🤣
@@steppoffaith8426 better start binge watching some Ironhorse videos then 🤣😉
@fabzacres-blackcat I better do something for sure!! Be hard to beat your variable exhaust trimming lol 😂😊😃🪘😜😀😁🤣
@@steppoffaith8426 already been done elsewhere and several patents exist … patents.justia.com/patents-by-us-classification/123/65PE?page=3
@@fabzacres-blackcat not an a piston ported engine at all. Only way to change compression is transfer height and or exhaust roof as far as something that is variable and highly debated already.