any progress with this build

Where did you see the '40 hp" gain from timing a port injected injector rpm wise? Im skeptical as I own a dyno and high end injector machine and have never found a single hp gain form sequential or timed injectors in a port vs batch fire OR a difference in AFRS whatsoever off of idle. Heres the reason WHY I disagree with the 40 hp gain: at say 6000 rpm, the intake valve is opening and closing 3000 times a minute. The injector is also firing 3000 times a minute. at a typical top end MS of say 13 MS, the injectors firing for .013 seconds (keeping deadband out of discussion which is minor) , extrapolating the data out to 3000 times minute, .013 x 3000+ 39, thats 39 seconds, so of in a minute of valve opening and closing 3000 times, the injector has sprayed fuel pretty much steady for 39 of those 60 seconds, so about 70% of the whole time. this is assuming the injector is NOT set to double fire and is only firing every 4 stroke revolution. When you see a injector on machine at anything over than equivalent to 2500 rpms, its a steady spray so i disagree 100 % with the 40 hp gain, you may have made other tuning changes and saw a gain but after a certain rpm your injector is spraying a giant stream/fog of fuel, Smitty
Now a direct injected engine, especially a diesel, yeah, I can see by advancing injector timing there can be a power optimization

Good information!

Did you ever get the boat back in the water

Just reread this one. Wanted to say thanks for all of the posting and data. I know we gave you a hard time.

I think if going NA with LS engines for a boat a guy would want to utilize all of the 9.3” deck height and get really aggressive with the stroke, like a 4.125” if possible. Better yet a sleeved aluminum block or aftermarket block with a big bore too. But then the budget comparisons to big blocks have really gone out the window.

Utilizing stock take off blowers like you did is really the smartest move.

no worries, my engines are still up and running great. We have Sens converted them in the last two years over to LSA ported Blowers and blah blah blah and we have them up to just over 1000 hp. Each different cam specs, of course. I can say this my 28 tall deck hauls ass and I can hold 6500 RPM’s as long as I want. We generally run them 5 1/2 pounds of boost. They make 767 hp each and about the same torque. Notice on the diner run we stopped at at 6400 RPMs even though we are still gaining over 20 hp per 100 RPMs that was our final tune for how we run it in the boat 90% of the time to try to keep the drives alive.

You dynod to over 1000hp with those blowers?

Correct