I used water cooled heat shields to control the temp under the engine hatch.

WHat ECM are you using? What block how much boost total. compression?

I knew this was the place to go! Lol... I heb a ton of questions..are those heatshields welded to the exhaust housing? Are your headers water cooled what did you use to run the water to the tips? Did you use automotive headers? Or did you use marine and modify the ends? Sooo many questions

This is a tall deck bow tie race prepped block at 572 ci. Very low compression and 25#'s of boost on 110 octane.

The heat shields were covering the housing but not touching them as we didn't want to cool the housing itself. The headers used are Dana Marine headers. We fabricated the exhaust pipes out of 6" stainless. CMI made me a set of 6" exhaust tips.

Boost is not boost. 10lbs from one turbo will not make the same power from 10lbs of a different turbo.

Keep the exhaust short before the turbo, and don't go too big on the pre turbo piping.

Make sure to size the exhaust housing correctly or you will have trouble spooling or high exhaust back pressure.

You don't need a lot of camshaft. Let the turbos do the work. Watch overlap.

Like stated, try to find someone that has a good working combo.

I have to do this work thing, unwound love to contact you about this later...I’ve got a set of 509’s, blower pistons, that I need to put the top end on:. I have a bunch of technical questions, with your setup, because I believe you’ve done exactly what’ve want to do... I was thinking of welding jackets on the turbo, but I love the 25 lbs of boost, you have to be in the 4 digits for horsepower. And if the bilge temps are in good shape, i would love to pattern mine after your build

1730 hp at 25#.

Many of the big diesels use a wrap or blanket. There’s a black wrap that marine exhaust out of Florida uses, I can put my hand right on the 8” pipe of 2000hp Mtu’s while the boat is cruising. I’d look into using that if you’re not using jacketed housings

Here you go.