Shawn's back to tell you everything you've ever wanted to know about stepped headers. www.rinehartracing.com #americanpipesforamericanbikes #rinehartracing.com
I wish he hadn’t said “everything i ever wanted want to know”. I wanted to know so much about these thingys and yet this video is two minutes long and basically just a definition of this concept generally. smh!!
@@rinehartracingusahow do you determine primary size & what size the step needs to be? Does it depend on engine size? How well the heads flow? What about header length. Starting at the flange, where you need the steps to start in order to make a difference & just overall length in general? Do 8-1 rotary fire on a V8, 6-1 on V6, headers make a difference with or without steps still make a difference? Or would having a normal 4-1 & 3-1 on each bank work just as good or better? I'd really like you guys to get into the technical details of it all.
@@TheTulerie We don't make headers for anything but V-Twin, American motorcycles. You may want to look up a different channel for questions related to cars!
This isn't everything I ever wanted to know about stepped headers. Its not even everything I already know. But anyways... One of the advantages is having your cake and eating too - you just have to pick a cake. So, for instance, you can build a header w/a smaller primary tube than your existing header allowing you to keep the same horsepower, while picking up some bottom end torque as well! Of course it all depends on your goals(which cake?). Every header makes its peak at a specific r.p.m. point. You'll have chosen ahead of time what that is. That still leaves a LOT unsaid. I'm not trying to write a book here. David Vizard (and he's on TH-cam now) has an excellent book on making h.p. And it covers some stuff on stepped headers.
We really don't recommend any sort of inserts or anything like that. In theory, they might provide some additional backpressure but in practice, they never seem to make any difference and they are prone to breaking or cracking, leading to rattling in the mufflers.
The Y pipe does a good job of exhaust scavenging, but it doesn’t equalize the backpressure as well as the H pipe, which is much more important on M8’s.
I wish he hadn’t said “everything i ever wanted want to know”. I wanted to know so much about these thingys and yet this video is two minutes long and basically just a definition of this concept generally. smh!!
Alright! What do you want to know?
@@rinehartracingusahow do you determine primary size & what size the step needs to be? Does it depend on engine size? How well the heads flow? What about header length. Starting at the flange, where you need the steps to start in order to make a difference & just overall length in general? Do 8-1 rotary fire on a V8, 6-1 on V6, headers make a difference with or without steps still make a difference? Or would having a normal 4-1 & 3-1 on each bank work just as good or better? I'd really like you guys to get into the technical details of it all.
@@TheTulerie We don't make headers for anything but V-Twin, American motorcycles. You may want to look up a different channel for questions related to cars!
This isn't everything I ever wanted to know about stepped headers. Its not even everything I already know. But anyways... One of the advantages is having your cake and eating too - you just have to pick a cake. So, for instance, you can build a header w/a smaller primary tube than your existing header allowing you to keep the same horsepower, while picking up some bottom end torque as well! Of course it all depends on your goals(which cake?). Every header makes its peak at a specific r.p.m. point. You'll have chosen ahead of time what that is. That still leaves a LOT unsaid. I'm not trying to write a book here. David Vizard (and he's on TH-cam now) has an excellent book on making h.p. And it covers some stuff on stepped headers.
Doesn't the step split the pressure wave into a double frequency, affecting the resulting sound?
That is possible but the design of our pipes create an acoustical pass, which cancels out the original sound wave.
@@rinehartracingusacan you elaborate more on the acoustic pass ? What designs were made to further optimise it ? Thanks :D
Thank you for answering this question that has been bugging me forever. Do you have any opinions on properly designed lollipops for non stepped pipes?
We really don't recommend any sort of inserts or anything like that. In theory, they might provide some additional backpressure but in practice, they never seem to make any difference and they are prone to breaking or cracking, leading to rattling in the mufflers.
"Everything you ever wanted to know about stepped headers"...*video over in 2 minutes*.
Ask away! We'll make more if we get some questions!
Would a stepped collector do anything? Say start at 2.5 or 3 and step up a 1/4 at a time to 3.5?
Which is better, H-pipe or a Y-pipe?
The Y pipe does a good job of exhaust scavenging, but it doesn’t equalize the backpressure as well as the H pipe, which is much more important on M8’s.
How “big” are the steps? Are they around 1/8” bigger?
We can't give ALL the info away ;)
Yes.
@@rinehartracingusa Dont worry, Maisteer will have the answer and itll be on youtube soon.
@@ChErRyaVe20pK yeah , I seen his videos so many times so I don't miss something
Can you make stepped headers for a sport bike? 4 into 1
We don't do sport bikes, only American V-Twin.
Will it make a diffrent sound in a single cylinder bike too?
We design all of our headers for V-Twin, so we can't necessarily say if it would or not.
@@rinehartracingusa ima do it anyway, bigger pipe starts in the middle of the pipe right?