[andream88]

Used the calculator:

RPM 7000
max boost 22psi
engine 2,7l

suggested nozzle output
7,37gph

So what's the right nozzles size for this application? (it will be a double nozzle set-up)

Cheers,
Andrea

[dvldoc]

Dual D03 nozzles, If you have the 250psi pump turn it down to the 150psi setting.

[andream88]

Ok great thank you ;)

[andream88]

Is your answer based on a calculation like this one?

150/100=1,5
√1,5=1,225
1,225x3 (DO3)=3,675gph x 2 (dual nozzle setup)=7,35gph

Cheers

[dvldoc]

Close but there are other factors, Knowing how much the output pressure on the nozzle itself at 13.25 volts on a 150psi setting helps out. It's actually around 4.2gph because it will be around 225psi output. (nozzle size determines output pressure) Minus your boost, minus the 16psi of the <span style="color: #AB0000; font-weight: bold; font-style: oblique; text-decoration: none;"><a href="http://www.alcohol-injection.com/water-injection-parts-3/brass-check-valves-64.html">check valve</a></span> plus there are a few wild cards like water vs methanol viscosity but we get you pretty much on the money. The 250psi pumps work a bit different then the 150psi pumps as they hold a more steady pressure.

So around 8gph minus the other factors like boost and the checkvalve is as close as you can get with a dual nozzle set up. You can use the controller and pump to further reduce pressure.

Which is almost still dead on.

[dogmatic]

Hi, sorry for stealing thread andream88, i have the same, an rs4 and have dot 2 nozzles. What is the most amount of water that can be injected at 250psi ?

[dvldoc]

Around 6.5 gph at 12 volts so just a fraction higher at 13.4v which is what most cars make when running.