Routing Waterlines
Figured I would add the hows and whys I plan on routing the waterlines for the b-pipe. I ran a dual circuit system last year and it worked the best for me but there are many different ways to do it as long as you factor in keeping adequate pressure in the headpipe. This is just how I do it and the reasoning behind routing it this way. There are many variations as we all know.
Single line = 6-7.75mm id (mine measures 7.75mm id)
Restrictors effects on system pressure
ex: 4mm pisser and the 6mm FCV = 10mm of flow being supplied by a 7.75mm line
10mm > 7.75mm supply -> lower system psi
**10mm can flow 129% what a 7.75mm line can supply
FP system reccomendations a 4mm res on bypass w/ single line system
On the exhauts circuit, a 4mm + whatever stinger is 6mm(**)? > 7.75mm -> flow on exhaust side of system
**= 10mm, so a restrictor on the stinger might help keep a little pressure in the system to operate the water injectors in the head pipe. A simple 3mm restrictor after the FCV on the stinger plus the 4mm pisser would flow 90.3% what a a 7.75mm line can supply. 51.6% of that is bypasses through the pisser while the other 38.7% can go to the stinger. Leaving 9.7% for injector function. Also keep in mind that by mounting the bypass t-fitting before the FCV, you all water circulation through the headpipe while the FCV is closed.
For the cylinder side line (7.75mm) a 6mm pisser can flow 77.4% what that line can supply. I find that a 6mm fitting work well for my application and does not over cool the cylinder. A 8mm pisser can flow 103% what the 7.75mm line can supply. In both cases it is a good idea to have a pisser that can flow 100% what the supply line can feed and use a restrictor in order to fine tune the cooling system.