Putting my 1991 31 foot Ocean Master on a SERIOUS diet!

[GringoJohn]

Originally Posted by Reefman

Capt, how much of a riser do you need for your exhaust system? Will the riser be as high as the motor cover then come down to your existing exit? I imagine when backing down on fish you need the riser to prevent back flow into engine manifold. Really enjoying your re-build! Thanks!

I usually put about 6 - 9 inches up over the turbo, but we also do a surge tube. Which is like you make the tube longer than it needs to be and then let the exhaust connect to the exhaust in the middle. That lets the surge go down and hit the end of the tube instead of climbing it. Does that make sense?

[Reefman]

Originally Posted by GringoJohn

I usually put about 6 - 9 inches up over the turbo, but we also do a surge tube. Which is like you make the tube longer than it needs to be and then let the exhaust connect to the exhaust in the middle. That lets the surge go down and hit the end of the tube instead of climbing it. Does that make sense?

Never seen a surge tube before! Great idea...let the salt water slosh around in the tube instead of climbing the riser. Learned something today...thanks. Do you use a flapper over your exhaust port?

[GringoJohn]

Originally Posted by Reefman

Never seen a surge tube before! Great idea...let the salt water slosh around in the tube instead of climbing the riser. Learned something today...thanks. Do you use a flapper over your exhaust port?

The flapper is one of those ideas that sounds great but does nothing at all. I mean really nothing, don't even try it, they should be illegal to sell types of deal.