Straight pipes

Huh, what....what did Pete say???   Zach can you hear him??   What did he say get a multimeter??

Ok people it sounds like the loudness is a big factor. How loud is it? Some say loud and some say quite so I feel it's time to get the DB meter out, set it on the A scale and take the reading at transom to deck level at WOT. Then report the reading as well as what type/material exhaust you have. Many here have IR temp guns so why not a DB meter??? With the data, there won't be any more guessing.

Get your measuring stick out Tim?

In my experience, manifold has A Lot to do with tone. Our '75 has PCM manifolds and risers and sounds bad @$$ with mega deep tone. The '76 has Escort manifolds and it's equally loud but the tone is, meh, no where as deep. Other than that, identical hose and copper pipes.

Copper is the bomb though. The SS makes it sound more like straight pipes on a truck. Copper gives it a specific tone.

When we were out taking pictures of my boat on the river run the Mrs said she could hear it back at Parramores

I forget exactly, but think somewhere from 28" to 32". We ended up cutting the SS pipes we bought which were 36" to about the same size. I can measure this weekend and let you know.

Installing a proper sized barbed tee into a wire reinforced cooling hose should be no big deal... unless youre attempting to do it dry, of course. A little water and some dish soap makes it about 1000x easier. Same goes for exhaust hoses onto manifolds, etc.

Wrestling an oversized copper pipe (at least 3.1" OD) into a 3" ID corrugated exhaust hose is a much bigger PITA. Trust me! Ive seen several sets of original copper pipes that are all crimped on the ends- its a real chore to get them started otherwise, but can be done. That crimping looks like it was counterproductive to exhaust flow.

^ heat and lube

Can't be much worse than installing the cold water shower T in a BFN 1.25" wire reinforced hose. OMFG that was a 2 man, 30 minute ordeal.

Yup, 3.0 Corrugated. I might take a little ride tonight so I can do a measure estimate on the needed length for all rubber.

Yup, I have been on shore, inside, and behind it. Maybe I am just having brain farts today but dad's mc was way louder than the footer. I learned to deep water boom beside that footer. Done some double and single runs behind it probably 15 times or so. I won't be able to verify my thoughts anymore though as it is running 4 inch this season.

I somehow knew before I saw what HW posted was that it was going to be a reference to that shirt ha.

Mark's V drive sounds like an offshore boat with those short run pipes and Stainless 45 bends in it.

We used SS pipes in our Cuda and it is not as loud as I thought it would be. It is not nearly as loud as our Malibu with 3.5" rubber hose.

Oh Paul it's because yours had a hot motor ;). Swear Vince's footer is not much louder than my stock 86 mufflers.

True, I just know Vince's footer isn't much louder than Teddy's (rubber vs mufflers). Mark's boat isn't comparable because it has such a short exhaust run and 4" pipes.

Dad's MC with rubber except for the 45 degree bends was actually pretty loud. It was an HO Indmar though so maybe more compression.

I can measure tonight if you won't be near the boat. Rubber actually makes the boats fairly quiet with no mufflers but stainless is clearly going to be much louder.