nhsswitched mine from electric raw water pumps to mechanical had to run them off drive shafts cool set up will post some picks when i can just ran boat yeasterday down in florida all is good

I had too switch from electric rawwater pumps to mechanical had to drive them off thedrive shafts pretty slick

Jim.

How many GPM and up to what RPM are they good before they become inefficient.

Sam

So you can buy up to a 550 HP motor with a 3 year warranty, and you get a year with merc on a BBC with 525.

Forgot one.
Mast Motorsport 600hp ls motor, full marinised.

http://ls1tech.com/forums/attachment...-boat-hal1.jpg

I've been running mine for a few years and am in the process of building another.

I see that you are a registered member and first post, welcome to OSO but you have been here since 2012. That is one gorgeous flat-bottom you have in your link. Tell us more about it.

Great looking boat Must be a blast to drive. What's the specs on your LSx?

Sweet boat! Details!

Anybody else put an Lsx in their boat?

what he said. i have a bone stock 420hp all alum L92 engine with 60k on it, im hoping to find an 18ft donzi to stuff it in. there are companies that make a wiring harness to connect the engine to the ecu, summit also sells a kit with msd ign box to run the ign and a single plane manifold to stick a 4150 holley on for about 700 bucks. i have a complete car so i was planing to remove the entire wiring harness and eliminate all the crap i dont need... i found exhaust and risers for under 400 bucks.... just need to find the right project boat...rm