I am installing Gill Marine manifolds and Stainless Marine pipes on my 311 ..we ran into a couple of problems ... First the pipes are too long and they extend within 3/4 inch of going thru the transom ...I am open for suggestions ...we are looking at a cpl of things. The first would be to just have Stainless Marine cut the pipes ...These pipes have a water jacket all the way to the end and have a 3/4 outlet inside the pipe . Not sure if they can do this . Second option would be to install 5 inch tips thru the transom and let the pipe slide inside the tips ..there would be a 3/8" gap around the 2 pipes which we could fill with hi temp RVT or simular ...maybe even install a boot over the joint ...

Second problem is the pipe needs to angle down to existing Transom holes. Needs about 10-11 degrees . This tranlates into a 1 1/4 inch wedge .. Gill has 3/4 and 1/2 but that would require too many gaskets and seems clumbersome. I am checking into local a machine shop making the wedges but I am open to suggestions ...thanks Mike ..

Mike, do all the pipes go through the original transom holes and end up three quarters of an inch short? If so, why not have a shop weld some new tips on the end of the existing pipes? Seems to me there ought to be a way to "flare" the interior side of some new tips, slide them over the end of the Stainless Marine pipes, and then just weld them together. Just a thought.

On my 242 with twin small blocks, it had a 3 inch pipe. I enlarged the original transom holes to accomodate 4 inch tips, then on the interior had then "necked" down to fit the 3 inch hose from the 3 inch risers. If they could neck down from 4 inch to 3 inch, they ought to be able to neck up just enough for a new tip to slide over. If they went far enough over it you could probably clamp it and not have to weld it.

I'll try thinking on it some more. Russ

Right the pipes are 3/4" short from going all the way through the transom. I would think the tips need to be separate from the pipes ..the tips have the flange that seals the water out ...if these were above the water line you prob could just extend them....

Those tailpipes must've been made for a TRS setup. Have someone weld on a 6 inch extension and use gasket seals at the transom. With those longer tailpipes you'll have less reversion than Bravo style tailpipes.

That's what I'm talking about. Flare the engine side of the tips to slide over the Stainless Marine pipes up to where the flange seals against the transom, screw new tips into place, and then clamp the the "flared" end of the tips around and to the Stainless Pipes. Problem solved, plus by clamping them you can always seperate if need be. I think it'd work just fine and would be an easy fix. Russ

Most of the extensions I have seen with Gaskets say they are to be used above the water line ...with the silent thunder I wonder if that would be considered above the water Line ?

Might werk Russ ...Kinda what I was referring to with the 5" tips but your idea might be a better fit ..

Mike, if you flare the tips just enough to slip over the Stainless Marine pipes, you would have a pretty tight fit already. Used to do this all the time on muscle car exhaust systems. That way you also wouldn't have the space to fill by using the 5 inch tips.

My transom holes are probably about 14/16 inches above the water line which seems about standard.

I think it would work out very well with relative ease, also shouldn't be too expensive for the tips. Get hold of Too Old @ Trick Marine here on OSO and let him know what you need. He's out of town until Monday.
He could have Stainless Marine make the tips up and drop ship them directly to you, and his prices are unbeatable. Russ

Mike,

You might want to check with Bobby at Lake Precision Welding on Crile Road in Cleveland. He did all the welding for Gil when it was Gil. He fixed me up on my 382 tailpipes and has also done work for Wags382. I'm not sure how he is on the internet, but if you can send him pics, he could solve this problem the best and least expensive way. I'l try to get his number to you ASAP.

Thank ya sir .....Outlaws idea might werk ...It needs to be right and it also needs to be ez to remove ...seems I got a motor out every other month ....