Wow they have very narrow squish band! From what I’ve gathered narrow squish band = bigger initial bang and higher peakyish power? Should run hotter due to that and the fact there is less secondary burn with less fuel and air trapped/hidden in the squish band? Great content man! All the notes you take are awesome, they should really pay off if they aren’t already.
The band area serves 2 purposes 1) increase charge velocity into the chamber at the top of the stroke by squeezing all the air fuel mix out of the band area and toward the chamber 2) it delays combustion in the area of the band, keeping the equivalent area of the piston cooler
In *theory* the peak power in a narrow squish band motor just occurs at a higher rpm, doesnt necessarily narrow the powerband, just occurs at higher rpm.
Thanks! I don't explain things very clearly but for now my main focus is corrected compression ratio and then picking durations based on what i find there.
@Super-Dave-Outdoors why the focus on the compression ratio? I would think volume/ratios of the cylinder & case, as well as the transfers, would yield a more telling and repeatable result in performance. Case compression, etc.
Current method of thinking is that is the best place to start. Can i prove that? Not yet, but i can take notes and even if i prove myself wrong i still prove something. I have a video planned to explain myself and some of my theories a little better, hopefully that will clear up a few things.
Yep, if you can have the same 2 cylinders at the same corrected compression ratios but different timing numbers it will show you exactly what changing durations does. How 120 transfer vs 125 transfer acts, how 105 vs 100 exhaust acts, etc. Would you select a cam without knowing your compression ratio? Why do it on a 2 stroke?
Rome wasn't built in a day. I think it took a week or two. Or something like that. Either way i got time to figure it out and take some notes along the way.
Well explain!
😁
I'll talk in circles trying to explain some of this stuff. I really am just focused on corrected compression ratio here
Torque is how much you can move horsepower is how fast you can get it there lol... good video pal
Wow they have very narrow squish band! From what I’ve gathered narrow squish band = bigger initial bang and higher peakyish power? Should run hotter due to that and the fact there is less secondary burn with less fuel and air trapped/hidden in the squish band? Great content man! All the notes you take are awesome, they should really pay off if they aren’t already.
The band area serves 2 purposes 1) increase charge velocity into the chamber at the top of the stroke by squeezing all the air fuel mix out of the band area and toward the chamber
2) it delays combustion in the area of the band, keeping the equivalent area of the piston cooler
In *theory* the peak power in a narrow squish band motor just occurs at a higher rpm, doesnt necessarily narrow the powerband, just occurs at higher rpm.
I watched the whole thing but would lying if I said I had a good understanding. I will just have to settle with trusting you 😉
I dont have the best understanding of it either. This is just one more step to trying to get all the puzzle pieces to fit.
@@Super-Dave-Outdoors incremental bit of understanding!
Yessir
👍🆙SD
Good stuff man
Thanks! I don't explain things very clearly but for now my main focus is corrected compression ratio and then picking durations based on what i find there.
@Super-Dave-Outdoors why the focus on the compression ratio? I would think volume/ratios of the cylinder & case, as well as the transfers, would yield a more telling and repeatable result in performance. Case compression, etc.
Current method of thinking is that is the best place to start. Can i prove that? Not yet, but i can take notes and even if i prove myself wrong i still prove something.
I have a video planned to explain myself and some of my theories a little better, hopefully that will clear up a few things.
@@Super-Dave-Outdoors gotcha. So you're basically mapping out and comparing while creating baselines.
I like it
Yep, if you can have the same 2 cylinders at the same corrected compression ratios but different timing numbers it will show you exactly what changing durations does. How 120 transfer vs 125 transfer acts, how 105 vs 100 exhaust acts, etc.
Would you select a cam without knowing your compression ratio? Why do it on a 2 stroke?
Go baby go!!!
Just trying to do science with chainsaws in the garage
Get your nerd on!
Rome wasn't built in a day. I think it took a week or two. Or something like that. Either way i got time to figure it out and take some notes along the way.
@@jonbobskunkworks
🤓👍🆙SkunkyBob
Hi Doc! Dave it’s fun to ponder the greater meanings of two stroke theory lol