I Have A Bravo 1 With Lwp. At Higher Speeds Do These Cause More Water To Be Forced Into The System Causing Higher Water Pressures. I Don't Have Water Pumps Or Sea Strainers. They Are Blower Motors With Usual Impellers And A Piss Off System Out The Transom Which Is Suppose To Open At 20lbs Pressure.

As long as your piss dumps will flow enough water to keep block pressure under 25psi, you ought to be good.

Yeah, faster equals more pressure usually. Trim angle can cause weird stuff, as well as high X dimensions. You really oughta plumb a pressure gauge into your block pressure so you can keep an eye on it.

MC