Green plate big pipe header for torque
- Thread starter fasttommy
- Start date
This pipe was designed for Green and Red plates.
http://bmkarting.com/NEW-Velocity-810-Header-Pipe-for-Restricted-Engines-DRSR.htm?categoryId=-1
http://bmkarting.com/NEW-Velocity-810-Header-Pipe-for-Restricted-Engines-DRSR.htm?categoryId=-1
racinnut15xm
Member
Bringing up an old one... Does anyone sell an .810 header now? Or have they all moved onto .880. Probably doesn't make much difference but thought i'd ask
Last edited:
alvin l nunley
Site Supporter
I spent a lot of years experimenting with, and building, two cycle pipes. There are some similarities between two cycle pipes and four cycle pipes.
One thing I found, the bigger the pipe, the more top end it has. I have no experience with four cycle exhaust, but I'm pretty sure this fact/theory would hold true for four cycle engines. In my experience, with two identical length pipes, one big diameter and one small diameter, the bigger pipe didn't seem to have much more low in, but definitely had more top end. There's all kinds of theories available to explain this, but you'll have to look it up.
I think in theory, shortening the smaller diameter pipe, could accomplish the same thing as putting on a bigger diameter pipe. Only experimenting will tell.
One thing I found, the bigger the pipe, the more top end it has. I have no experience with four cycle exhaust, but I'm pretty sure this fact/theory would hold true for four cycle engines. In my experience, with two identical length pipes, one big diameter and one small diameter, the bigger pipe didn't seem to have much more low in, but definitely had more top end. There's all kinds of theories available to explain this, but you'll have to look it up.
I think in theory, shortening the smaller diameter pipe, could accomplish the same thing as putting on a bigger diameter pipe. Only experimenting will tell.
alvin l nunley
Site Supporter
I spent a lot of years experimenting with, and building, two cycle pipes. There are some similarities between two cycle pipes and four cycle pipes.
One thing I found, the bigger the pipe, the more top end it has. I have no experience with four cycle exhaust, but I'm pretty sure this fact/theory would hold true for four cycle engines. In my experience, with two identical length pipes, one big diameter and one small diameter, the bigger pipe didn't seem to have much more low in, but definitely had more top end. There's all kinds of theories available to explain this, but you'll have to look it up.
I think in theory, shortening the smaller diameter pipe, could accomplish the same thing as putting on a bigger diameter pipe. Only experimenting will tell.
One thing I found, the bigger the pipe, the more top end it has. I have no experience with four cycle exhaust, but I'm pretty sure this fact/theory would hold true for four cycle engines. In my experience, with two identical length pipes, one big diameter and one small diameter, the bigger pipe didn't seem to have much more low in, but definitely had more top end. There's all kinds of theories available to explain this, but you'll have to look it up.
I think in theory, shortening the smaller diameter pipe, could accomplish the same thing as putting on a bigger diameter pipe. Only experimenting will tell.
I believe I may have one left. That web store is no longer running.
racing promotor
Moderator
When Big Chris chimes in, which ever one he recommends.
racinnut15xm
Member
I would love his opinion on the matter. I've got one that is an .880 and the other I have is 1.1 or so, I forget the exact on the bigger one. But its huge for a plate motor