nobody has dyno'd an engine at this power level with and without wet exhaust??? If you tuned the motor on a dyno with dyno headers then stuck it in the boat with your wet exhaust it is not going to make a power difference? Assuming it lives at 6000, does not piss of neighbors, does not hurt ears, etc........forget all that. How much power does the wet exhaust (long tube water jacketed headers 700hp@6000) steal when there is good flow at the wet tails. Anyone?

The guy that dynoed my motors said 15-25hp.

Typically taking off the dyno headers and installing the engine in the boat, you have to go down 3-5 jet sizes to obtain the same air fuel ratio. Assuming the engine isn't a complete pig that would be 15-25 hp

anything cammed that high would have to have dry exaust anyway ... right ..

Dry exhaust with water dumping at the end of the tails, IMO is the way to go. If its too loud add some clamp on mufflers.

Two questions:

1. Anyone running dry up on Lake Erie, any issues with noise?
2. Best method to muffle a dry exhaust?

Fixed it as I know you meant to say Mild

I run mine dry welded the tail pipe and put dump offs at the end of tail pipe out the transom what you loose in the big tail pipes is torque and that's what turns the prop

I will be.
I'm using a pair of lightning , dry to the very tip, headers and I just picked up a pair of clamp on mufflers so I can scrub a little noise when desired.
I have no idea how loud it will be.

I had a 1999 Formula 382 Fastek and put a pr of 700 HP 572's in it. It had GIL exhaust with wet tails. The engines never ran right in that boat..... So I traded the Formula for a 1994 Cigarette Top Gun Which came with dry tails. The engines ran great in the Top Gun......Moral of the story, if it doesn't run right with wet tails, get another boat.