Was just watching a video of Hennessey testing a Z28 and onstar called him wanting to know if he was all right because the accelerometers registered high G forces from him testing at the race track. In the video they do a excellent job of capturing the sound of the exhaust note coming and going and hearing the engine accelerate. For anybody that has swapped in a LSx engine into their boat, what does it sound like compared to a big block? Please post a video or audio file if you have one too.

not lsx but ls2 stroked to 6.6 l 550 hp and 550 ft/lbs dry exhaust

https://youtu.be/Dh1AVt_vc28

https://youtu.be/0nXxjZU2y3c?t=2m59s

Definitely sounds like a car to me at idle.

How many ls based boat's do you think are out there to begin with? I have a friend with a massive hard on to build a turbo ls for a boat. I will stick with my bbc personally can't beat that sound!

We have boat drags this weekend on my lake. Some of the racers have put LS motors in their jet boats. One has a single turbo LS in his Youngblood pickle fork that he is trying to get me to buy.

Have a friend in the process of assembling a LS engine to replace the 454 in his 253 Convincor.

My toon is getting a Twin Turbo LS over the winter, Just about done with the motor.

I test drove a boat with the new Volvo Ls engine. It had a very nice burble to it. When reved it sounded pretty good. Not as low of a rumble as a BB but it sounded good.

They sound like my 540's C-Swap fire 4/7_3/2 fire order bad AZZ

That is me. I am currently building a 408ci all aluminum LS2 to put in my boat. Its about finished as I just ordered my last big item, a set of Lightning headers. I'm hoping that in a month or so, I'll have it rigged in the boat and can give you a video of what it sounds like. It has a pretty healthy cam in it too, so I'm hoping it'll sound pretty good.