water injection installation questions

[Thealastair34]

Originally Posted by stevieturbo

Intake charge temps of 25degC on boost with 20psi are nothing to be even remotely concerned about.
In fact, many would be pleased with that.

If you're injecting water, I would not be injecting it before the intercooler.

My concern is that this is based on one power run on the rollers with good cold air feed, not on the road with the bodywork on. I doubt it will be that low on the road

Why is the hot side of the intercooler considered bad in terms of injection?

[stevieturbo]

A large part of the theory behind water injection is that some of the water will get evenly distributed into the cylinders to cool the chamber and suppress detonation.

Spraying before the IC means that is unlikely to happen. If charge temps are cool, you'll just fill the IC core with water.
If they are hot...the water may boil off....then possibly re condense inside the IC core.

Neither are ideal scenarios.

You really need to establish actual charge temps first before worrying too much. And also find out exactly what your CR is.