Speedwerx dry pipe water routing and Jetting specs B-pipe to Dry pipe

[Schmidty721]

Anyone have experience with the water routing on a Speedwerx dry pipe. Photo of one installed in a ski or a diagram would be awesome.

Also, will going from a B-pipe to dry pipe require jetting changes or can I tune that with the High/Low needles?

780cc 5mil stroker, dual X-metal 46's, Total loss, and Speedwerx pipe.

Thanks for any help. Just trying to get some of this sorted before I stall assembling parts

 

[yamanube]

I don't have a diagram but your line(s) coming in from the pump (through the bulkhead) run to the manifold, the rear head fitting goes to the lower inlet on the chamber (down by the manifold coupler) the mi-chamber fitting connects to the end stinger fitting and the fitting between those goes overboard. Hopefully this makes sense.

 

[yamanube]

Tossed this together quick, I know it is a FPP/Riva pipe but the idea is the same.

 

[yamanube]

Some people substitute the line coming from the head to the lower chamber fitting for one coming from the pump to the lower chamber fitting, might keep your underhood temps a little lower. I would also advise running in line filters on your incoming lines (between the bulkhead fittings and the manifold). The waterjacket can be very narrow in some places and will clog with sand/debris possibly causing overheating (and is a PITA to clean out on the water).

 

[Schmidty721]

Thanks! That was what I was thinking but wasn't sure. I've always ran separate engine and pipe circuits with my b-pipe. One cooling line to the manifold for the engine and one straight to the pipe. I'll have to give this one some thought. How do you make sure the front and rear cylinder are getting the same water flow with the setup you drew?

 

[yamanube]

Both cylinders share the same waterjacket, there is not a lot you can do with the head fittings that would greatly effect the cylinder temps individually. Either way both cylinders are getting filled by the same cold water, once full it stays full so no matter what end the water comes out its pretty uniform across the cylinder.

 

[Schmidty721]

Got one ride one it and jetting is where it needs to be I think.
What are the options for restricting flow on a drypipe, both total flow through the jacket and flow into the H20 box. I want to try drying out my H20 box a little to see if that helps regain some hit right off idle.

Also, can anyone comment on Water injection on the speedwerx? I have a injection controller but would need the solenoid setup still. Over all I'm really impressed with the pipe, just feel like there might be more left in it still.

 

[yamanube]

Put a main jet in the stinger fitting. Just for chits and giggles I plan on running mine with a water injection fitting, with a small jet inline, no water injection controller so essentially it will be a wet pipe. Everybody says the dry pipes wake up with water injection, which basically makes them a wet pipe at low RPMs and drys them out as the REVs increase. Because my hull will rarely see wide open runs, I feel like this should work pretty well.

 

[Schmidty721]

Please report back with your results. I was debating on trying something like that as well.
I'll restrict the stinger fitting before the next ride.

 

[Pro-pulsion]

I'm reviving this thread! I just tried this very thing with installing a jet into only one water injection port on my Riva manifold and it totally ruined my performance. The bottom end hit was more immediate but substantially reduced from how it was prior to being totally dry. I used a 105 pilot as my injection setup and found that it really hurt across the full power range. My only other option (as I may try again) is running a flow control valve and reduce it to a trickle but maybe without the jet this time so it just sorta drips into the exhaust stream rather than sprays into it. Anyone have any water injection experience with the Werx pipes? What I have found with mine is that the outlet going to the stinger is a special 1/8" looking barb with a 1/16" hole and uses a 1/4" hose, then the fitting on the stinger is an injector stem with a thin slit cut in the end. I know the flow going down there is very limited so I don't bother with restricting there. xXx Octane xXx you have experience with our beloved Speedwerx pipes...any thoughts?

 

[Quinc]

Subd.

 

[xXx Octane xXx]

The Speedwerx Pipes (Yamaha and Kawasaki) were designed as dry pipes and work very well as dry pipes. I've never heard of anyone having good results injecting water at the manifold on either the Superjet or the SXi Pro dry pipes.
I would leave it dry.

 

[Pro-pulsion]

Another thing I have found is the importance of stock timing. I was experiencing a slight flat spot on my absolute off idle throttle response. While testing an aftermarket CDI and setting my timing back a bit, (about 5 degrees for early production Advent T3 modules) out of precautionary measures for this different CDI I noticed on closer inspection my marks were very slightly off. After my CDI testing I realigned my marks to be as accurate as I could get them by eye on stock alignment...which required being half inside the hull upside-down to see them closely. The follow-up test yielded much better throttle response, so much so to the point of no more off idle flat spots. Just pure power all the way through. My tack showed a max surf RPM of 6990 without getting the ski up to peak RPM. Pretty decent I would think.