Informative video. I've download both programs in readiness to make a pipe in the near future. However I'm unsure of how you decide what angles to use in Cone Layout to get the pipe to fit on the bike without it dragging on the ground or fouling the frame etc?
Hey, great question. It's a bit of luck and some pre cutting prep that can help you with layout, I will make another video touching base on the layout aspect soon. But I usually figure out the header sweep in degrees. That will vary from bike to bike. Then I do a rough measurement of how long I need it to be from center of the pipe. Then I do a couple layouts and use the print function in cone layout and cut them out and make a paper model that I can test. Once I am happy with my paper model and it jives with what FOS gives me, I start the transfer to metal.
Nice. My son have yz85 and now 105cc athena on. And stock pipe. Do you think he need a new pipe for more power?and what would the new pipe be differen?The stock 85 cc cylinder is exaktly like 105cc only more cc and a little bigger carb. He wants hgs pipe but is it better?what is the real differens stock vs hgs?They cost a lot of money. If a pipe like hgs only give like 5%more power i think its too expensive. Thanks.
I dont know the specific answers to the pipes you mentioned but displacement and port timings play a big part in the pipe design. So if you still running the 85cc pipe a pipe designed for the 105 will most likely make more power.
@@pitobread im no experter on 2stroke exhaust pipe. But if its more cc more exhaust is comming out. Even IF the yz85 cc is exactly The same sizes on ports.i dont know how to calculat. But mayby The pipe where The silencer is comming have to be bigger?
@@GFG2600 I didnt have many inclusions in the belly, I had a few in the header I ground out before i welded on the next section. I cover a trick i use in the other video about welding it on the mandrel to cover the backside of the weld to help with that.
I may be late to the party but how does one tell the calculator what kind of pipe I'm looking for? Like, wether I want a pipe for a short and strong powerband or a wider powerband
Its been a while since I made the video and also a hot minute since I have made a custom pipe, but from memory without watching the whole thing and firing up the spreadsheet the calculator lets you pick a RPM point for HP, so If you want peak power at x rpm you would put the values you want there. I think that the dual angle reflector is where you start getting into widening power. Also pipe building is somewhat still witchcraft even with a calculator so you sometimes make a follow up pipe after with a few trial and error changes.
@@pitobread Hello, the link for downloading the program no longer works, could you give me a working link, or send the program to another way here is my mail: nizamov99@inbox.ru
That sounds wrong but without knowing your engine specs I dont know, i would check all the info you input into FOS. The pipe I make works allright but I need more testing and tuning
Informative video. I've download both programs in readiness to make a pipe in the near future. However I'm unsure of how you decide what angles to use in Cone Layout to get the pipe to fit on the bike without it dragging on the ground or fouling the frame etc?
Hey, great question. It's a bit of luck and some pre cutting prep that can help you with layout, I will make another video touching base on the layout aspect soon. But I usually figure out the header sweep in degrees. That will vary from bike to bike. Then I do a rough measurement of how long I need it to be from center of the pipe. Then I do a couple layouts and use the print function in cone layout and cut them out and make a paper model that I can test. Once I am happy with my paper model and it jives with what FOS gives me, I start the transfer to metal.
@@pitobread What if your welding sucks like your pipe ? Welding is much harder than math, it's math experience ?
Nice. My son have yz85 and now 105cc athena on. And stock pipe. Do you think he need a new pipe for more power?and what would the new pipe be differen?The stock 85 cc cylinder is exaktly like 105cc only more cc and a little bigger carb. He wants hgs pipe but is it better?what is the real differens stock vs hgs?They cost a lot of money. If a pipe like hgs only give like 5%more power i think its too expensive. Thanks.
I dont know the specific answers to the pipes you mentioned but displacement and port timings play a big part in the pipe design. So if you still running the 85cc pipe a pipe designed for the 105 will most likely make more power.
@@pitobread im no experter on 2stroke exhaust pipe. But if its more cc more exhaust is comming out. Even IF the yz85 cc is exactly The same sizes on ports.i dont know how to calculat. But mayby The pipe where The silencer is comming have to be bigger?
@pitobread the download link for the excel sheet doesn't work anymore, can you upload it somewhere? Thanks a lot😁
i will see if i can dig it up again
The download link doesn't work, could you send me the excel file? Thanks
I will grab it off my laptop and re up it someplace
@@pitobread thanks. Did you ground of the welds in the belly part of the exhaust?
@@GFG2600 I didnt have many inclusions in the belly, I had a few in the header I ground out before i welded on the next section.
I cover a trick i use in the other video about welding it on the mandrel to cover the backside of the weld to help with that.
@@pitobread If you have the time, could you upload the excel somewere and share it on the description? Im sorry to bother you, but I'm kinda in a rush
@@GFG2600 I can try later tonight I am not at home right now.
I may be late to the party but how does one tell the calculator what kind of pipe I'm looking for? Like, wether I want a pipe for a short and strong powerband or a wider powerband
Its been a while since I made the video and also a hot minute since I have made a custom pipe, but from memory without watching the whole thing and firing up the spreadsheet the calculator lets you pick a RPM point for HP, so If you want peak power at x rpm you would put the values you want there. I think that the dual angle reflector is where you start getting into widening power.
Also pipe building is somewhat still witchcraft even with a calculator so you sometimes make a follow up pipe after with a few trial and error changes.
19:22 you did bad rounding(?) 33,06 rounded will never be 33,7... Just 33,1 or 33
oh probably, im pretty dumb sometimes.
hi, with what program especific, can run the archive? , cause its .dxf
its for paper temples
another question what size of piece piper need to print?
It has been a while but I believe you can change the saved file to a .jpg or the like.
A4 paper. or standard letter size.
@@pitobread Hello, the link for downloading the program no longer works, could you give me a working link, or send the program to another way
here is my mail: nizamov99@inbox.ru
hi Pitobread, can you send the program to me too?my email is: gabriandreassi08@gmail.com
I have updated the download link
Liked your video, just a little question what do you do after the 21 day trial is finished on cone layout?
it still works.. just the nag box increases.... or you can just buy it ;)
how well did your pipe work, cause this thing wants me to build a 6 inch diameter belly piece and that seems crazy
That sounds wrong but without knowing your engine specs I dont know, i would check all the info you input into FOS. The pipe I make works allright but I need more testing and tuning
When you rounded you went way too high. 33.06 is not even close to 33.7
Probably, I'm always mixing up numbers I don't write down.