Freestyle factory B pipe issues

[chris m]

Hi guys

Im having some trouble understanding the factory b pipe (header pipe) water jacket and screws.

There is 3 tuning screws on the header pipe that go into the water jacket, below the screws is a tiny hole that go's in the chamber, my question is......... are them tiny holes directly below the screws ? so when you turn the screw all the way down it blocks the hole ?

my next question is...... is the water jacket all linked to each screw, I mean does the water travel all the way round the header pipe if that makes sense, so when it gets full and under pressure it can spray out of the holes into the chamber if screws are open?. or are they different compartments to it,
you have a water line at the bottom and at the top, so I would guess that is all as one

sorry for the long message, lol

any help would be appreciated cheers

 

[Mike W]

Hi guys

Im having some trouble understanding the factory b pipe (header pipe) water jacket and screws.

There is 3 tuning screws on the header pipe that go into the water jacket, below the screws is a tiny hole that go's in the chamber, my question is......... are them tiny holes directly below the screws ? so when you turn the screw all the way down it blocks the hole ?
Yes and yes

my next question is...... is the water jacket all linked to each screw, I mean does the water travel all the way round the header pipe if that makes sense, so when it gets full and under pressure it can spray out of the holes into the chamber if screws are open?. or are they different compartments to it,
you have a water line at the bottom and at the top, so I would guess that is all as one

sorry for the long message, lol
Yes, the water enters either through the top or bottom fitting (depending on how you have your routing) and travels through the pipe and exits the other fitting.

any help would be appreciated cheers

 

[fastgtfairlane]

yes when the screw is tightened all the way, it should not any water flow through. if you take the screw all the way out, youll see how the end has no threads and is machined at the end to fit the hole. sometimes the hole below the screw can get clogged with carbon. its a very small maybe 1/16 inch hole. it took really tightening the screw tight to get it to seal up completely. its just one large water jacket going around the head pipe with the screws at different points to inject water into the exhaust chamber at different points in the headpipe to control the headpipe temps. a cooler pipe will generally have more low end torque while a hotter pipe will have more rpm. the top screw will make the heapipe cooler because its at the top. the bottom will give you more top end while cooling more so just chamber and coupler while heating up the headpipe.

you can route the water lines either way, ive seen many skis setup either way. many run the water into the pipe from the bottom so it fills up from the bottom and exits the top but you could easily run the inlet on the top and outlet on the bottom. i dont think theres really any significant difference in performance by any means between the two.

 

[chris m]

Thank you, much appreciated for the reply, massive help this
Cheers