My mechanical preturbo water injection

[dudemaaan]

Originally Posted by 88turboii

"extending the compressor map" doesnt that just mean adds a bunch of lag? I would wager the misted water puts a lot of resistance on the comp blades, slowing spool time.. post-turbo, not a problem. dudeman have you do done any testing of turbo lag with and without WI? how much are you to expect

thinking about adding a small amount of WI for my hybrid turbo setup with an ARC tmic. intake temps in boost get up to 150F in the summer

Has absolutely no effect on spool. I first set the water on at 3 psi and It actually seemed like spool was very slightly increased. Maybe due to increased density or maybe in my head. I was running out of water too quickly so I set it to 8 psi. I don't notice any difference in spool at all. I run a laggy turbo so changes in spool is one thing I WILL notice.

The reason most likely that the compressor map is extended is because:
As a turbo's efficiency decreases the air temps start climbing, once the air temps exceed 212*F the water will flash and start bringing the air temps back down. So more power can still be made at boost levels that normally would just cause excessive hot air.

That's my take on it anyways, my turbo is pretty big so I have no way of really testing it out unless I take it to 30 psi or so.