Competition Snow Performance Water/Meth Testing!

[Jim Fulmer]

Yet another saga unfolds with this system! After the last dyno event In knew that I might be asking for just a little too much out of one pump, So after some testing and thought I came up with an idea to try on my truck.



Run 1 pump on the two nozzles (625's) in the hat and run another pump on a 3rd nozzle (625) in the intercooler to hat pipe set to come on at a higher pressure.



I first tried this with both coming on at the same time with the same power source... ... not too bad! I then changed it to two different power sources, different hobbs switches and different pressures for turn on.



Here is what I came up with so far: In valet it just doesn't like it, yes it gains 15 psi of boost(50-65) but it bangs all the way to high RPM. In full fuel it seems ok but doesn't quite have the feel even at 85 psi, so I'll check and turn the pressure down to tune it. The life of R&D..... crazy fun! At least I know that I reached the limit..... easy to back off.



Pump #1 @ 35-40 psi and Pump #2 @ 50-55 psi!



Jim

 

[Cooker]

Thanks for sharing your results.



So your results were not what you were expecting? IIRC you were running three nozzles before correct, now you just added a second pump to the 3rd nozzle?

 

[Jim Fulmer]

I figured the motor would take all of the water but it's just a little too much. Yes I was running (3) 625's before and activated a solenoid to turn on the third nozzle and this seemed ok at the time. At the D/FW dyno event I hooked up a 4th nozzle but it didn't seem to work good as told by the low gain in numbers.



Once I got home I began pressure testing the system and found that the pump works great on one nozzle holding about 260 psi and about 200 psi with 2 nozzles but drops off after the 3rd is added and drops way off if adding a 4th.



2 nozzles are fine but it needs more liquid so there comes the 3rd nozzle, but with the pressure drop off and bucking against 80 psi of boost it doesn't cut it. Adding the second pump allows 2 nozzles to run at optimal and 1 to run at really high pressure... ... ..... I'll verify these pressures again today.



On the initial 2 pump setup with both pumps running on the same power wire my though was not enough current flow so there was a loss in pump speed..... pressure. Now with two separate systems the pumps have there own power wire. Also when doing this you need to check it with the motor running so you get full voltage... ..... the pump will run faster with 14. 2 volts that with 12. 6 volts. I just set it up to shoot the water into a bucket.



One things is for sure though, you can make 2-3 runs a drop the water tank level down a few inches... ..... this is new!



Jim