[parmas]

Originally Posted by cinesnow

Parmas,
Thanks for the input, I was thinking a check valve would be essential but wasn't sure on cracking pressure yet, i'll order some of those check valves and see how it functions again soon. With the check valves, the line sould keep filled and only discharge the line pressure back through the solenoid and into the washer res. To make sure it donen't drain the line between the solenoid and injectors, introducing air - I made sure to have the exhaust line higher than the rest of the circut.

Marc, a check valve with high cracking pressure should be good enough to close before leaving solid drops. Stock AEM check valve is 15psi cracking pressure while Aquamist I do not know. My intension is to leave 15psi cracking pressure on PRE-Throttle Body while setting cracking pressure of 100psi on the PRE-turbo check valve. This way the pre-turbo always activates far after from the pre-throttle body injection.

Let's make an example on mine:

I do not have any intercooler but only a 20cm pipe between turbo and engine. Because of my setup, it is critical that water injection is initiated as low as possible to prevent pre-ignition during spoolup.

- Set the AEM water injection to start at 0psi boost. Eventually it takes till 2psi boost to eventually crack that 15psi check valve.

- On the AEM, the FULL injection (= 150psi AEM pump pressure) is set to 20psi boost.

- Set PRE-Turbo cracking pressure of 100psi. To roughly calculate pre-turbo injection start let's make FULL PUMP PRESSURE \ DIV BY \ FULL BOOST = 150psi \ 20psi = 7.5pump_psi per 1boost_psi.

- With this setup, for every 1psi boost you get 7.5psi pump. The fact that the injection eventually starts at 2psi boost although set to 0psi is the fact that it needs to pressure the valve 7.5psi x 2psi setting.

- Now if we know how much pump pressure we get per boost we can know that @ 100psi pump / 7.5 = 13.3psi boost

- Conclusion is that Injection throttle body starts at 2psi boost - turbo injection starts at 13psi boost - full injection obtained at 20psi.

Today I decided to do a threshold test on a stock audi radiator with an integrated gearbox cooler. I cut down the flanges and tapped the ports for -6 and put it on the test bench, It held up to 700 psi and ruptured internally at 800.
I don't expect that the trans cooler portion of the radiator would ever see more than 300'ish psi in operation, but we'll see what happens once it's set up.

To be sure, what is the purpose of the radiatior to heat the water or to cool the water ?

Very interesting setup with the braided line, do you have any pics? 10*c is a huge rise!

More to come soon...

............