B-pipe advice

[MarkWalker]

Looking for a little advice. I recently picked up a RN with a smoked piston. Made a few changes. Was a 62T cylinder. Changed to 61X cylinder, had it ported with "Yamanube" templates. The ski came with a FX1 chamber B-pipe. I also have a brand new Mod chamber B-pipe. So. Do I run the FX1 chamber pipe or use the Mod chamber set up? Which would perform better?
The motor-
718
ADA head
Zero lightened flywheel
MSD enhancer
"Yamasaki" coil
Carbon Tech reeds
38mm carbs- Factory B-pipe spec jetted.
OEM waterbox
Solas 12 vane Mag
Solas 10/16 prop

 

[MarkWalker]

 

[brapperdoodle]

I would buy that FX-1 chamber if you wanted to sell it, or trade you a limited chamber... Just sayin I actually need it for an FX-1 haha

I heard a rumor though that supposedly the FX-1 chamber is the best performing "B-Pipe" chamber ever produced...

 

[kevbo]

Use the longer chamber then bore the nozzle/flatten the prop if it doesn't respond quick enough.

 

[OtherDonnieGuy]

The mod chamber and b chamber are nearly identical. Splitting hairs in my opinion. Most can't tell the difference between a limited and mod chamber. fx1 chamber is worth quite a bit more money, that's the real difference.

 

[JetManiac]

Run the mod chamber and sell the rare fx1 chamber.

 

[wydopen]

I’ve switched between fx1 and mod chamber and couldn’t feel much difference

 

[fastgtfairlane]

You could put a small dent just behind the stinger on the mod chamber and call it a fx1 chamber haha

 

[waxhead]

The fx1 chamber makes the most power
Then the limited
then the mod pipe
Sell the mod pipe as its the worth performing pipe from that range

 

[Quinc]

The fx1 chamber makes the most power
Then the limited
then the mod pipe
Sell the mod pipe as its the worth performing pipe from that range

Where does the octane pipe fall into this?

 

[waxhead]

Where does the octane pipe fall into this?

I have not tried it, So cant answer on that one

 

[PAUL C]

I have run the fx1 pipe and the mod and the limited and the original 650 pipe and unless you dry them out to where they almost melt the coupler there isnt much difference until wide open top speed in my experience running them on both my fx1 and my superjets.

 

[brapperdoodle]

I figured that was the case. Really splitting hairs here. I guess in a full blown application an expert rider MIGHT be able to tell the difference. Ive just been sitting on the waiting list through RIVA for a MOD. Funny though, when I bought my first B-Pipe everything just happened to be in stock. I just placed an order and it shipped, I was thinking "what's the big deal?" Now im on a waiting list for 6 months haha. I call Factory Pipe every few weeks and speak with their secretary. She literally says the exact same thing every time I call her.

ME "Hello, I was calling to check in on the Yamaha B-pipe status?"

FACTORY "I don't think we have any ready yet, call back in 3-4 weeks"

I have called more than a few times. I always wonder when she will tell me "STOP CALLING ME!!!" But she always says to call back in a few weeks haha

 

[JetManiac]

The fx1 chamber makes the most power
Then the limited
then the mod pipe
Sell the mod pipe as its the worth performing pipe from that range

When you say one chamber ‘makes the most power’ or more power than another one, are you saying more power where?

At high speed WFO racing conditions?

Or more low end for freestyle/freeride?

Or more power across all rpms?

 

[waxhead]

The Mod is 2hp down on the limited
the limited is 2 hp down on the fx1 chamber
The fx1 revs on harder
The limited is about the same in the mid but just signs off a little earlier
The mod is a lemon

 

[mikidymac]

The Mod is 2hp down on the limited
the limited is 2 hp down on the fx1 chamber
The fx1 revs on harder
The limited is about the same in the mid but just signs off a little earlier
The mod is a lemon

So which one are you going to include with the Wax W-Pipe?

 

[fx1mark]

The Mod is 2hp down on the limited
the limited is 2 hp down on the fx1 chamber
The fx1 revs on harder
The limited is about the same in the mid but just signs off a little earlier
The mod is a lemon

So, do you have a way to test horsepower? What kind of hp gain do you see with the fx1 pipe?

 

[OtherDonnieGuy]

What bugs me is how these chambers tend to all look a little different from each other over the decades. Now I've only ever bought one brand new pipe, so maybe they getting tossed around between owners took a toll on them. Anyone else have similar experience?

 

[waxhead]

So, do you have a way to test horsepower? What kind of hp gain do you see with the fx1 pipe?

This is what Mark Baxter told me years ago. It was proven on the factory pipe dyno,

 

[waxhead]

So which one are you going to include with the Wax W-Pipe?

Its different