Wanted: B pipe header, any condition damaged/stuck screws okay

[Storbeck]

Looking for a B pipe header pipe. Any condition would be considered.

For my X2 I used a b pipe header that had stuck screws with damaged threads, just removed all of the screws and welded them all shut and installed a spray bar down at the bottom in a position that is accessible on an X2 since you can't really get to the screws anyway. I was pretty happy with how that worked, but have since installed it on another ski that I don't want to take apart.

So, looking for another one to modify the same way, and hate to do it to a nice one.

So, since you can buy these more easily now days, maybe somebody has a crusty one they were holding onto and don't want to deal with any more.

Lemme know what you've got.

 

[fastgtfairlane]

ive seen that modification done before and have strongly considered doing it to my headpipe even though all screws turn. i bet it probably works better than the screws.

 

[Storbeck]

I really couldn't say if it's better, probably about the same as running just the bottom screw I would guess, I find it more convenient though, especially in an x2.

 

[waxhead]

When we made the wax header I only wanted to have a bottom screw but i knew people would complain. You are onto it

 

[fastgtfairlane]

The headpipe I saw had the injection point close to where the middle screw is located. A hole was drilled into the water jacket and and into the exhaust stream and welded back solid for a boss to tap. I'm guessing where you drill has a nice solid area to drill and tap into since you did it close to the coupler. I've always heard that the closer to the engine that the water is injected into the exhaust, the more the water affects the Soundwave. I've never use the bottom screw because you can't adjust it once the pipe is bolted on. The individual thet did the modification to the headpipe said he found it to work best in the middle of the headpipe.

 

[waxhead]

I only use the bottom screw. I close the other two off. if you use the top screw the power rolls over very fast in my experience with no advantage down low

 

[fastgtfairlane]

Several different ways to skin a cat none are wrong and everyone has their reasons for why they do things the way they do. I'm sure where the water injection point will work best depends on the entire setup from pump load, jetting, port timing and ignition timing. According to factory pipe who originally designed the pipe to begin with states that the best bottom end and throttle response comes with using the top injection screw and in my experience, that has been true. We set our engines up a little differently from one another.. im north of the equator and you're south. You prefer reverse jetting that basically dumps all the fuel on the bottom where mine is completely uniform with throttle position. Your setup uses extra fuel to cool the expansion chamber where mine uses water. Both can work well when tuned properly, it just comes down to how you want it set up..

 

[Storbeck]

I'm with Wax on this one, I'm sold on the idea of cool motor and hot pipe. Tune pump to match. The screws on the B pipe header are in a way just a way for people to tune when they're too lazy to tune the pump. Which I have done...because I also am lazy and tuning the pump is a lot of work.

But, to be honest my primary motivation for this in the first place was convenience in the X2 hull.

I think there is a small theoretical advantage that separating the water injection from the cooling water means you can run the header hot but use cool water for the injection so you don't need as much of it....but in reality....my stuff is not that fine tuned it probably doesn't actually matter.

 

[waxhead]

Several different ways to skin a cat none are wrong and everyone has their reasons for why they do things the way they do. I'm sure where the water injection point will work best depends on the entire setup from pump load, jetting, port timing and ignition timing. According to factory pipe who originally designed the pipe to begin with states that the best bottom end and throttle response comes with using the top injection screw and in my experience, that has been true. We set our engines up a little differently from one another.. im north of the equator and you're south. You prefer reverse jetting that basically dumps all the fuel on the bottom where mine is completely uniform with throttle position. Your setup uses extra fuel to cool the expansion chamber where mine uses water. Both can work well when tuned properly, it just comes down to how you want it set up..

I do use the fuel to cool the chamber. the reason i do this is the chamber gets up to heat faster than it does if you use water. This means you get the low end of a wetter pipe and the top end of a drier a pipe. But as you say so many way to skin a cat

 

[fastgtfairlane]

my pipe definitely gets hot as well as i have the screws just above cracked open. i have the top and middle screw cracked on my engine, around 1/2 turn out combined. i also have 2- 1/2 lines coming from the pump to a manifold so the engine, pipe, and stinger are fed seperately. so the headpipe gets cool water from the pump. i run a restrictor on the bypass going straight overboard, not feeding the stinger. i can fine tune water pressure with restrictors in the bypasses or simply tighten the flow control valve. so at lower rpm my pipe cools back down pretty quickly with cooler water directly from the pump vs being preheated through the engine like most people do. I will also say that when i tried reverse jetting, my pump was tighter and it did not respond well. i have since taken 2 degrees off the leading edge and also put a 2mm spacer behind the impeller. i might frick around a try it again with a looser pump and see if its any better. i noticed it was either on or off with the reverse jetting where as its pretty linear now which i like. im not one of those constant throttle blippers.