Invertaflow repair

Are you planning on bypassing the muffler altogether?

I had thought of that as an option, but was going to try to repair this first.

Hawktique wrote: Yes I am. I'm taking out the invertaflo and having a straight pipe made in it's place (modified Y-pipe). Should get better sound and flow that way.

I have that on my 176.

Can't talk in the boat.

Currently looking at muffler options.

Tim

One of my other harps on the invertaflow, it sounds like a little smurf is in there pounding on the side like a drum. I've heard the stories of them going out, so I plan on eliminating it. If it's too loud, I could always splice in a 4" muffler where kapla has his stainless.

Chris4x4gill2 wrote: I'm still trying to figure out the best way to flare the metal tubing though. I need it to be just slightly rolled so it will not work its way into the muffler. I'm worried about this becasue the I dont think the Fiberglass will bond very well to the metal and I want to keep it from moving

Chris,
I'm not following what the flare is for but to make just one, I'd just peen it in or out with the ballpeen hammer and the corner of a vise if a anvil isn't available. You want to remove this piece when done correct? The epoxy will want to stick to it. I'd grease it up and then try to remove it after the first layer of glass isn't fully cured.

Chris,
Re reading, if you flange out, you won't be able to get it out anyway!! You could leave it in. I don't see a problem with that.

anyone know the ID size of the hose between the Invertaflow and the risers on the '89. I think 3" but dont have the hose here to double check.

I'd stick a form of some sort in that hole that is close to the original ID, like a Coors Light can or balloon or something and just start wrapping new layers of glass around it. Of course after a few full wraps you'd have to focus on building layers of glass on that broken portion so you don't end up with an oblong shape. I believe those non-HO manifolds are 3" ID.

I'm sure the MANY fiberglass guys here will have all the details and suggestions you could ever want on how to rebuild this.

Original Idea looks to be close to 2.75" I'll have to start scrounging the shop to see what I can find, But that was kind of the purpose for wanting to create the insert, to keep it round so it will seal properly, I know I will have do a thicker buildup on the cut away part to do that and I thought that would be the easiest way to keep the form correct. I just didnt plan on taking it back out afterwards.

BUT.....your arguments are persuasive. I'll start playing around with it more when I get home and see what happens.

Thanks for the input, guess I'll start looking ofr soemthing to use as a form when I get home.

I cut the inlet down to about 1/2" from the main body of the muffler. I then took a coke can, cut the bottom out and split the side. I left the top intact to help it hold its shape better. Took resin and "kitty hair" and made a a paste to fill in the gap and then started wrapping with fiberglass cloth.

Once I got a few wraps on, I let it cure for about 2 hours. It had started to set so I pulled the can out and then let it sit for a few more hours to harden. Then went back and added more glass till I got to my thinckness. I think I might have gotten a little too thick, but htat ok since its slightly tapered. I expect the hose to go back on fairly well. I'll let it cur eall day today and then I'll cut it off at the right height and see what else needs to be touched up. Hopefully I'll be running this weekend.