I was thinking along the lines of 20-40 lbs. on the inlet and 200 on the bowl (not droop) for a mild hotrod lake boat??? I never seen data on something like that so its hard to say.If you can get 50 on the inlet, go for it. On the bowl, the higher the better.
I agree with Jak when he says not to get too high on the inlet.The jet can only process so much water, now people like to say that really high inlets create lift and thats a whole different subject that probably wont get talked about here. .
Whats frys my unit is I started a thread about inlet pressure a while back and the thread tottally sucked. I was prepard to discuss everything in detail and go over my numbers Ive gotten from my data logger but none of the techie guys took the bait.A guy with a set of guages from pep boys got more replys that I did.
Im starting to believe that racer chit LVjet talks about is true.
based on where my pressure taps are located (and you know where those are), i like to see between 40 and 60 on the suction, but i'm not too concerned if i see spikes to 70 if it's really rough. on the biz, we had a tap closer to the intake, where we would see half that pressure, and it would dip to 0 first on unloads, so it was useless at that point, other than later comparisons with other data. what i want to know is how far down it's going to go, how long it stays that way, and how long it takes to recover, and to what pressure it recovers to.
like when i hit a really big hole in san diego and completely unloaded at over 100. when i hit that hole and went to the rev limiter, the boat completely unloaded, and the suction spiked to 80, then back down. i already know my setup, but it told me -how long- i lost thrust. i still ran a .92, so needed to compensate.
at marble falls, it was extremely windy and there were white caps all day saturday. if i had the tap too low, i wouldn't have been able to guage the little partial unloads that happened 5-6 times as i went down the track on Q2, and figure out the effect.
consequently, with my -basic- system, i like where the taps are located. if i had a more extensive system, i'd use it for broader analysis and evaluation, but after what i learned with the race pak, this is ok for now...