Riva red pipe water diverting and carb jetting science

[billglass]

I got thinking today. Can someone explain the water cooling concept behind this pipe. I have one installed for many years from the shop with one pisser off the stock head tapped for extra pisser. Running dual cooling. SInce the original install, I have added a pisser off the line going to the stinger with restrictor and jetwork flow control on the very end going to the stinger. And added riva water injection.
This is what I know allegedly:
1) jetworks valve keeps water from going into stinger at idle and thus gives a better takeoff because we don't have to blow water out of water box. Real world experience seems to back this up.
2)High restrictor at pisser coming off stinger equals more low end punch.
3)less restriction or more flow at pisser coming off stinger equals more rpm.
4)water injection add more punch stating in 3000 rpm range till it shut off depending on how you program it.

Questions: Can and should you run no restrictions off the line going to the pisser? What is the optimal restriction to have in place. How does this relate to carb adjustments? I have seen some people say it doesn't affect the carbs. Personal experience seems to say it does.

I have not seen a comprehensive guide in this regard. I'm sure this has been adjusted by many and some real world experience would help understand this concept better. Thanks..

 

[billglass]

No one with experience on water flow on these pipes? What's the best low end punch set up? Run all the water through stinger or divert a little or divert wide open? We all know that cooling diagrams show diverting the line going to the stinger, no one talks about how much.. What are you running???

 

[RMBC Freeride]

Such an old pipe design. Most people just run them as-is and enjoy the improvement over stock. Usually they are a stepping stone to get to a B-pipe where all those tuning options can be truly utilized.

So I guess what I'm saying is that there are not many people that have messed with tuning and tweaking those pipes. If there were any gurus, it was probably a long time ago (20 yrs ago!) when they were trying to compete with the B-pipe.

 

[billglass]

You're right that a factory B pipe has always been the pipe to have. Unfortunately I got my riva red pipe when I got my Blaster in 96 and the guy at dealer reccomended the red pipe and I didn't know any better at the time. I have seen posts saying the Riva pipe was similar in power. Notice the word use..... but a PITA to install. I don't think the horse power gains would be great enough to switch for me at this point. But I probably would have too much trouble selling the red pipe I don't think.. I figure that next upgrade for me at this point would be cylinder related and would include at minimum refresh top end with an ADA head with some cylinder mods like porting, boring, big bore. I have know Idea what would be the best to do. I do know that if I take the engine apart, I want to do it right and once. and I do know I want to stick with pump gas since alot of my riding in full throttle carving down the river. Sure I enjoy freestyle and jumping too. But nothing like carving those wide open tight turns on glass. I've gone through a tank in a hour. That could get quite expensive in gas alone considering I'm not racing and the blaster will never beat any of the competition with the 701. I've started some research in that area, Those jetmaniac engines looks awesome, but I think those are geared more towards freestyle superjets. I gotta research more.
Bottom line, I don't think there will be enough difference between the two pipes to warrant switching. and I think that my $$$ would be better spent on engine work.
Also, it would be nice if there was more info on this pipe. When mine was installed, the guy didn't even have a pisser installed.. go figure.
and also, I have done every other plausible bolt on mod possible. Group K bored carbs, group K lightened flywheel, boyensen RAD valves, flame arresters, MSD enhancer, not to mention jetdynamic grate, plate, and works pump shoe and adjust a thrust cone. oh, milled head, dual cooling, water injection, steering, msd coil and plugs,.
But correct me if I'm wrong, any info is appreciated, I don't pretend to know it all..