It's 2016 to hell with porting...

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Jon1212

Jon1212

Riff Raff Fart Knocker from other Forum's.
Joined
Feb 17, 2011
Messages
11,194
Location
Spanish Fork, Utah
A two-stroke max hp is produced at a temperature that will destroy the engine ... Peak egt occurs at 1 lamda ... about 14.7 to 1 ... if u go richer than 15 to egt will drop and if u go leaner than 15 to egt also drops ... peak power occurs at a slightly lower temp so it's important to know which side of the fence you're on ... I've given away much ...
dr evil quote.jpg
 
Jon1212

Jon1212

Riff Raff Fart Knocker from other Forum's.
Joined
Feb 17, 2011
Messages
11,194
Location
Spanish Fork, Utah
151af6bfaf23e7738a9194be9a37dffe.jpg
Cousin,

Where do you get Memes like this? It's hilarious, and whomever the creator is, is an Internet Legend, or dare I say, kind of a big deal....
 

TBS

I have chainsaws and chainsaw accessories.
Joined
Jan 3, 2016
Messages
2,831
Location
California
Ok ... lemme tell ya a secret ... EGT ... that stands for exhaust gas temperature ... that's the baseline I use guy ... and yes it DOES matter the shapes angles and locations of the outlets ... a two-strokes peak performance comes at a temperature that will destroy the engines components over time ... gotta find the sweet spot with the temp ... a race saw designed to make 3 cuts is gonna have a higher egt than a muffler modded worksaw ... period ...

And how are you getting those get numbers, unless you use an egt reader you don't have that number. Non contact temperature readers give you surface operating temperature which is totally different.
 
Jon1212

Jon1212

Riff Raff Fart Knocker from other Forum's.
Joined
Feb 17, 2011
Messages
11,194
Location
Spanish Fork, Utah
And how are you getting those EGT numbers, unless you use an egt reader you don't have that number. Non contact temperature readers give you surface operating temperature which is totally different.
I suspect the numbers he is quoting are from the same source as the rest of what he has posted........his ass.
 
Chris-PA

Chris-PA

Where the Wild Things Are
Joined
Jul 9, 2011
Messages
10,090
Location
PA
A two-stroke max hp is produced at a temperature that will destroy the engine ... Peak egt occurs at 1 lamda ... about 14.7 to 1 ... if u go richer than 15 to egt will drop and if u go leaner than 15 to egt also drops ... peak power occurs at a slightly lower temp so it's important to know which side of the fence you're on ... I've given away much ...
What you've given away is not what you think it is.

While this is a nice little description of EGT and fuel mixture, the saws your working on have a feedback carb designed to provide a constant lambda (fuel/air mixture). So how exactly is this relevant, given you are doing muffler mods? And exactly how does your muffler mod change said lambda, given the feedback carb?
 
blsnelling
Joined
Nov 8, 2006
Messages
53,727
Location
Franklin, OH
A two-stroke max hp is produced at a temperature that will destroy the engine ... Peak egt occurs at 1 lamda ... about 14.7 to 1 ... if u go richer than 15 to egt will drop and if u go leaner than 15 to egt also drops ... peak power occurs at a slightly lower temp so it's important to know which side of the fence you're on ... I've given away much ...
You've given away nothing. You're not controlling the EGTs with a muffler mod. To suggest as much only demonstrates your lack of understanding of the subject.
 
Guru LLC

Guru LLC

ArboristSite Member
Joined
Jun 30, 2016
Messages
93
Location
Da House
A two-stroke max hp is produced at a temperature that will destroy the engine ... Peak egt occurs at 1 lamda ... about 14.7 to 1 ... if u go richer than 15 to egt will drop and if u go leaner than 15 to egt also drops ... peak power occurs at a slightly lower temp so it's important to know which side of the fence you're on ... I've given away much ...

So.....not only are you producing a tuned muffler, you've hacked into the M-Tronic system to alter tune?

You really are a gifted man.
 
82F100SWB
Joined
Feb 12, 2009
Messages
722
Location
Dryden, ON, Canada
I know full well there is a fine line where max power is produced just before it starts to melt the dome of the piston but it is still eating itself. Things like this happen:
9250737ca5a2efe905d7da0d7f574bc7.jpg

Followed by this:
e93b83e854f0a5870557932b64738f05.jpg


Nothing you are talking about is any kind of secret squirrel stuff, anyone who takes 2 stroke performance seriously and takes the time to educate themselves can find exactly what you just said in multiple good books on the subject.
If you are really serious about making power an expansion chamber will make your modified pressure box look silly any day of the week.
 
Top