How to determine what exhaust I need?
 

There are so many exhaust options, how do I determine what exhaust I’m going to need?Custom 496 stroker motor puts out 570 hp 670 foot pounds of torque. I’m going to be redoing the air inlet and put a through transom exhaust with a captain‘s call switch to route the exhaust out into the water if it’s too loud.

Replacing my 7.4l it currently uses a wet exhaust system. Id prefer a wet system to keep the manifolds cool.

Stainless marine

What cam?? Stainless marine is a great exhaust, What you will deal with more given healthy numbers from a 496 is the possibility of reversion, a captains call could possibly increases that risk it really depends on the build of the motor. If your motor designer/builder is a good marine guy he should be able to tell you.

With those numbers I doubt you will be able to run silent choice. If you can swing it , gen3 stainless marine is hard to beat.

yup, and ask to have the dam put in if not standard. This helps even more against reversion.

Motor delivered today...

From the package...

. THE CAMSHAFT IS A NEW ELGIN INDUSTRIES E1143P AND WITH A TRUE CLOYES DOUBLE ROLLER CHAIN SET. THIS CAMSHAFT IS A HYDRAULIC LIFTER GRIND .576 LIFT 246 DURATION @.050 ON BOTH THE INTAKE AND EXHAUST AND IT IS GROUND ON 108 DEGREE LOBE SEPARATION

Sorry for the caps am using my phone,. I quickly and copied and pasted this from the description

Smarter guys will chime in, but I think 108 will be a problem with wet exhaust

Dry exhaust with no water even crossing the exhaust stream at the end. Has to be watercooled in an I/O application.

This type exhaust legal for your area ?

Dimly lit minds like mine wanna know how this got delivered ? Was this ordered as a I/O marine engine of course.

i live and boat in Wyoming. We have no exhaust laws for boats.

We run dry exhaust. Stainless marine.

it has been confirmed by dockhands at our local watering hole…we are the second loudest boat in the area.