b pipe carbon chamber

keefer

T1
Location
Tennessee
I wonder why nobody has taken the time to make a SS version of the B mod or limited chambers? FP made the B1 mod chamber from SS, why not the SJ?
 
A stainless steel chamber is more difficult to build (weld) and the wall thickness would be thinner and crack if not made correctly. The carbon would not ressonate as well as alluminum, stainless or mild steel. I respect those that have built a carbon pipe but if it was worth it one of the well funded factory race boats would have done it. The ones I have seen have been works of art but not hp producers. Besides who's going to spend the money and time to prove otherwise.
 

yamanube

This Is The Way
Staff member
Location
Mandalor
Like this?
rd021.jpg


Dasa carbon pipe.
 
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Racers can't afford to sacrifice performance for flash. Ok, R&D had a carbon pipe. Rius didn't use it and he has the latest and most advanced version of the R&D pipe. I did ask Mark Baxster (Factory Pipe) about it once and he said it wasn't worth the effort. I don't see anyone here who has more dnyo time or pipe building experiance.
 

yamanube

This Is The Way
Staff member
Location
Mandalor
Racers can't afford to sacrifice performance for flash. Ok, R&D had a carbon pipe. Rius didn't use it and he has the latest and most advanced version of the R&D pipe. I did ask Mark Baxster (Factory Pipe) about it once and he said it wasn't worth the effort. I don't see anyone here who has more dnyo time or pipe building experiance.
R&D didnt make the carbon pipe, dasa did. Its not that there are no major teams using the carbon chamber, there are just no American riders using the carbon chamber....we must know something those japs dont.:fing02:
 

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
Yup, and that would be that people will pay out the ass for carbon parts, whether they bring a performance advantage or not.

:biggthumpup:
 
I know were in the driveline category on this subject not freestyle or race but lets not forget freestylers are always trying to reduce weight and are concerened with weight as much as hp do to flight, whereas racers dont care so much about weight, in fact racers add weight to achieve handling charastics and ruff water blasting. So in reguards to the R&D carbon chamber, that pipe design makes fantastic hp but in its metal form(particularly dry) it is heavy(not to mention high center heavy*freestyle concern*), and due to its weight and design it has a tendency to crack manifolds fairly easily..So making the chamber out of carbon is middle of the road again..the exhaust system is now lighter then a standard FPP "B" system, keeps the engine bay cooler and cools down considerably faster, most likely will not crank the manifolds anymore-no lord mount necessary,is molded to clear PV's and will most likely make equal hp #'s in The Real Operating World of a *Freestyle* engine bay, again we need to throw the false world of a perfect dyno room aside which in no way represents a real world environment....remember pwc have a highly unusual situation when compaired to cars/motorcycles/anything, our engine&exhaust are bascily in a sealed box with limited air volume and a freestyle engine must suck its air needs in as we use no ramed air..Most all of Japans top freestylers use carbon exhausts..
 
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If The carbon fiber made more horsepower it would not be much. Why not change one of the many other things you could change in your setup and get more power that way.
 
Carbon pipes Do Not make more Hp....They basicly do not allow as much Hp to be lost from heat soak & steam and that famous *sizzling* chamber creates...and on a side note they just happen to be lighter which is always a perk:cool2:
 

GIL

Power In The Hands Of Few
Location
Cullman AL
Since I am one of the people who have built a carbon chamber I'll say what I know about the issue. First, it's anything but easy to make and have it look presentable. The "test results" from the link that Tricky provided are to be almost entirely disregarded. We all know now there was never any dyno testing done back then. To further make the point, the "dyno testing" that was done showed an INCREASE in power with the carbon chamber over the metal versions. My seat of the pants testing was pretty inconclusive. I ran it on my superjet with an untuned underpowered motor. The difference between carbon/al chambers showed little difference. When I finally got around to getting a serious motor I used the metal pipe to reduce the chance that a poorly performing pipe could skew my tuning. I've just never gotten around to doing any further testing. If my theories about the supposed loss of power are correct, there is a viable soluton that would correct the issue. At this point in my life it just hasn't been a priority. Making them of high enough quality where I would be comfortable with others seeing my work takes an immense amount of work and time. Gil has one now to play with and as he gets comfrtable with his motor he will be swapping in the chamber to do some more objective testing. He doesn't have any money involved so he doesn't have any reason to "feel" power that isn't really there.

I will be testing a carbon limited chamber thanks to Crammit, blaster mod, b-mod, b-limited, and a TNT. I have 2 ski's I will test so that we will ALL know what the deal is. 1st ski is 03RN w/stk 701 w/ADA girdled &35cc domes and rear exhuast outlet only. 2nd ski is my comp ski-98RN w/Lamey/LPW/85mm/flattop/5mil stroke w/frt and rear exhaust and X metal h20 box.
 
So when you say testing, your going to run it on a dyno, or between two points for time, or are you talking seat of the pants feel for which means nothing. Yamaboy, I really enjoy the defending of a point by using non realistic reasoning. So what is the weight difference between a CF pipe body and an aluminum body? I guess Eric Malone could use some of your help, because he just uses an aluminum water jacketed body built by Mark Baxster who knows nothing of two stoke pipes. Mark helps with the boat builds so I guess he's wrong too.
 
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Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
Thanks egbrig, I was just going to bring that weight thing up.

Anyone weigh a std aluminum mod or limited chamber? You might save weight going to carbon, but I think it be a better bet to just take a ******** before going on the water.
 

cookerq62

Life's Been Good
Location
Upper Bucks, PA
Even if it does add power and it is lighter. I can think of a ton of other things I would get for my ski before spending $500 on a carbon chamber. At that price you could get you cylinder ported instead or swap domes and run race gas for a whole summer.
 
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