power factor pipe questions

Little_Franny

Little_Franny

Location
Cape May Court House, NJ
I have a power factor on a 701 I have been running for a while now, runs good, makes good power even though I am still a little rich. pulled engine and pipe today for other reasons and noticed that all the turf I had glued to the bottom of the waterbox was shrunk up, melted and almost all gone. So I got to thinking about the thread about b-pipe water pressure and tuning the screws on the garden hose. Went out to the hose and hooked up the chamber to the hose and was suprised at the lack of water that comes out of the end. I know its a dry pipe, but it has a FCV and stinger at the exit of the chammber, something about the water sprays out and makes the diameter smaller and thus makes more top end power.

Guess my question is are you guys having issues with a hot water box? Anyone ever played with the FCV or does PFP have it pretty well dialed? Is anyone running a restrictor on the pisser?

Jon
 
baxt3r

baxt3r

BBQ
Location
Charlotte, NC
I can't offer any advice, but do you care to share a bit more about your setup and experience with the PFP on a 701? Thinking about pulling the trigger on a PFP for when I upgrade engines, but don't want to lose any power if it can be helped.
 
hink320

hink320

Location
sask, canada
It's incredibly easy to experiment with water box temps by simply rotating the FCV in either direction. I had my water box hot like yours where it started melting turf, then opened it up to cool it and it made noticeably more power.


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Little_Franny

Little_Franny

Location
Cape May Court House, NJ
Ok, I'll have to play with it. I like to learn as much as possible about things before just starting to adjust poop.

My setup is a bone stock 62t/62t 701 with a 62t head, dual 38 sbns 75 low 135 high, high needle closed, low needle 1/2? 65 gram springs, 1.5 n/s, lightened stock flywheel and rev limit deleted on 62tcdi. Runs good but it's still rich, have not got it quite tuned perfect yet but super happy with power
 
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speedysprocket

speedysprocket

Alex
Location
Chesapeake, VA
Put it on the trailer in the water or some other way of holding the ski in the water and adjust the FCV so it comes on around 3000 rpm. The main point of the valve is to keep water out of the water box at low RPMs when the engine isn't blowing that water out. This improves your bottom end response after a slow speed period as you don't have to wait for the engine to blow a bunch of water out of the water box..
 
masterblaster

masterblaster

X-H2
Seems the pfp doesnt really do better with a really dry box anyway,and even worse without one at all for low end responce. run it wet and cool and then super dry back to back and see for yourself. Try running the pipe injected with a 40 jet for good low end power on small cc
 
clouse22

clouse22

BDB Kustomz
Site Supporter
Location
Lake Orion, MI
try taking the jet out of the stinger end and just dial it in with the flow control valve

are you running the plastic filter on the line before the stinger? maybe your jet got clogged with some debri and its not letting enough water flow
 
JetManiac

JetManiac

Stoked
Site Supporter
Vendor Account
Location
orlando
Little_Franny said:
Ok, I'll have to play with it. I like to learn as much as possible about things before just starting to adjust poop.

My setup is a bone stock 62t/62t 701 with a 62t head, dual 38 sbns 75 low 125 high, high needle closed, low needle 1/2? 65 gram springs, 1.5 n/s, lightened stock flywheel and rev limit deleted on 62tcdi. Runs good but it's still rich, have not got it quite tuned perfect yet but super happy with power
Click to expand...

That is a smaller than stock high speed jet? Do you mean 135?
 
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