yeah, i think the best manifold anti-heat set up would be a turbo blanket and a wrapped manifold. Has any one ever tried the polymer intake gaskets? Their design could actually work. If the two manifold, lower and upper wont "touch" they wont displace as much heat from the exhaust. Even a few Drops in air intake temp will improve power but thats just a suggestion. Hey, what about the water ports in the motor? If im correct, they allow water to run through the intake manifold to heat it up for faster warm up and emission or...something like that. Im guessing if someone was to block off that hott water from running through there manifold you might add some power due to the lower Air intake temps.

 

Turbine housing blankets are very bad for the turbos. I just took one off a car with only 4k miles and the turbine housing was flaking apart. Not to mention the bearings cooked. They don't allow proper expansion of the turbo, they do work well to keep underhood temps down though. That is why we sell the inconel turbine housing heat shields, they do the same thing the turbo blanket does but the small air gap allows the turbo to expand and contract properly.

You are corrrect about the water passage on the LIM. I always weld those and the EGR passages shut.

 

I've got the gotham racing heat blanket on my turbo so I think both should really help reduce the under hood temps. I really don't look at these mods as performance increasing, more just overall safety against engine failure.

Interesting, this is the first time I've heard of this happening with a turbo blanket. Looks like a perfect thread to start in the single turbo section If this is a common occurance it looks like I may just have to get ya'lls inconel turbine housing.