The header pipe length really affects how the pipe works. It's just one of the many variables. I'd open up the Jennings book and have a look at some of the pipe calculations. There is also an online chamber calculator that might give you some insight. I'll see if in I can find the link for it.
Definitely looks good👍🏻 maby getting more of a smooth/curved and shorter transition on that head pipe would help raise the powerband? Straighten or enlarge the stinger? Im sure with a few tweaks you'll have it screaming in no time!
I think the longer the header pipe before the transition gives low rpm torque if you shorten it up it will give you more power in the upper rpm you can even make a 2 piece adjustable expansion chamber to adjust power band like the LRD pipes for Honda 250r
The 394 carbs work good on there. Takes a lil trickery to get them all fit up but it’s all common sense stuff. They’re a more modern design and flow good. I had one on that 181 I got off you.
Just my 2 Pennie’s…thinking that abrupt turn from the square tube into the pipe is a short circuit on the pipe. I know squat about them, but tend to think that would be an issue. Looks great!
According to some of my bike tuner buddies even a good dent on a chamber robs noticable amounts of power. They claim any abrubt turns like that are no good.
8 pin and maybe someone that knows pipes can tell you better, but the head pie may be too long. You can also play with the stinger size and change the resonance too. It reeks of coolness 👍🏼
I know just enough to be dangerous but there is an app you can download that you can input engine parameters and rpm range and it will spit out the dimensions needed for the proper pipe I think like any calculator the output is only as good as the input so I'm talking nitty-gritty mesurements...it is literally named "exaust calculator" I found it on Google idk if Apple has a version
Your lookin for about 12 to 13 in the cut. Id take abour 8 inches off that pipe before the chamber. Id bet anything itll make a huge difference. Your stinger is kinda different to from what ive seen. Im not a pipe builder but we did play around with 250r piped in welding class to see what would happen.
You’ll have to do some fairly good and in depth porting to get a 2100 OR a 2101 to turn the speed of say a 395 or a 661. On the other hand, 2100’s don’t have a tendency to drop RPM in a 3’ and bigger cut like the other saws do. It’s one of the last few big timber saws out there. 😢
My guess is the only time blowdown matters is with a true expansion pipe because you have to time the pushing and pulling pulses from the pipe with transfer timing on the cylinder. If the pipe wants to pull or push at the incorrect time then it will either suck part your charge out of your cylinder or feed dirty charge back in.
The header pipe length really affects how the pipe works. It's just one of the many variables. I'd open up the Jennings book and have a look at some of the pipe calculations. There is also an online chamber calculator that might give you some insight. I'll see if in I can find the link for it.
This👆
Definitely looks good👍🏻 maby getting more of a smooth/curved and shorter transition on that head pipe would help raise the powerband? Straighten or enlarge the stinger?
Im sure with a few tweaks you'll have it screaming in no time!
I think the longer the header pipe before the transition gives low rpm torque if you shorten it up it will give you more power in the upper rpm you can even make a 2 piece adjustable expansion chamber to adjust power band like the LRD pipes for Honda 250r
This will be really cool once you get it dialed in and possibly ported! Sounds crazy good.!
Shorter header length, wider opening on the converging cone. Then stick a decent length stinger pipe on it and shorten it til you're happy
Interesting! It certainly didn't gain but its the 1st try! Good stuff Boedy!
The 394 carbs work good on there. Takes a lil trickery to get them all fit up but it’s all common sense stuff. They’re a more modern design and flow good. I had one on that 181 I got off you.
Just my 2 Pennie’s…thinking that abrupt turn from the square tube into the pipe is a short circuit on the pipe. I know squat about them, but tend to think that would be an issue. Looks great!
According to some of my bike tuner buddies even a good dent on a chamber robs noticable amounts of power. They claim any abrubt turns like that are no good.
I think stinger length also affects rpms aswell. Not sure if that bend is helping any
8 pin and maybe someone that knows pipes can tell you better, but the head pie may be too long. You can also play with the stinger size and change the resonance too.
It reeks of coolness 👍🏼
@11:15 I didn't expect this from you really 😆, watch hydroforming maybe you will like it
A man does what he can with what he has to work with...
Why do you pull the rope out when you shut the saws off
I wish I knew more about pipe dimensions, and how they affect the running characteristics.
I know just enough to be dangerous but there is an app you can download that you can input engine parameters and rpm range and it will spit out the dimensions needed for the proper pipe I think like any calculator the output is only as good as the input so I'm talking nitty-gritty mesurements...it is literally named "exaust calculator" I found it on Google idk if Apple has a version
Your lookin for about 12 to 13 in the cut. Id take abour 8 inches off that pipe before the chamber. Id bet anything itll make a huge difference. Your stinger is kinda different to from what ive seen. Im not a pipe builder but we did play around with 250r piped in welding class to see what would happen.
Looks cool u have that lol ..I think it's to 90derg off how was 372 at that point of pipe
You’ll have to do some fairly good and in depth porting to get a 2100 OR a 2101 to turn the speed of say a 395 or a 661. On the other hand, 2100’s don’t have a tendency to drop RPM in a 3’ and bigger cut like the other saws do. It’s one of the last few big timber saws out there. 😢
My guess is the only time blowdown matters is with a true expansion pipe because you have to time the pushing and pulling pulses from the pipe with transfer timing on the cylinder. If the pipe wants to pull or push at the incorrect time then it will either suck part your charge out of your cylinder or feed dirty charge back in.