Have you guys ever heard of wrapping the metal hoses that run between the turbo and intercooler? While I was in the Rio Grande valley at my folks retirement community an older guy(retired diesel mechanic) was interested in the PCV reroute that I did. He said that I should wrap the hoses with foil lined tape to insulate it for better temperature efficiency. Thoughts???:confused:

It might work. Was looking my neighbors 2007 pickup yesterday. As tight as everything is under the hood on the pickup it sure would help them. But have not seen anything other than a turbo wrap. Our trucks have the pipes out in open area of engine compartment. Would be fairly easy to do.

Hes actually backwards. You would not want to wrap then turbo to IC charge pipe. If anything paint it black. The intercooler to manifold pipe is the one you want to wrap.

Right the intercooler cools the exhaust before going back into engine. Air temp avg what 75-85 temp under hood 185-195. So protect the cooler air. Cooler the air the better the performance/economy.

Am I reading this the way it is written? If not sorry! The charge air from the turbo ( fresh air) is heated by the compressing of it! (what temp it is ??) The difference in temp between it and the engine temp is?? The intercooler cools it, then back into the engine compartment, heating it up by ??? amount.This ducting is the one that would be best to wrap to reduce the engine temp transfer to. I know that after 150*F is were one looses 1% power for every 10*F rise in air temp from the compressor! This return line is were I would like to install a temp gauge. I would love to see a graph of post intercooler temps versis ambiant air temps for a season or two to see were a cutoff maybe stated as to were it is nessecary to have your post cooler line insulated I suspect that only in the higher temps of the United States is were one needs to be too concerned about this??

So if one was going to pull a hill loaded for ?? minutes you can expect to see what kind of power drop?

Its not a simple thing to explain, but I will try to sum it up while saving your boring details.

What you are asking about is 3 numbers.

Air inlet temperatures (AIT) This is the temp of the charge air as it goes into the cylinder

Turbo inlet temperatures (TIT) The temperature of the air as it goes into the turbo. Generally this should be very close to ambient unless your intake sucks, not in the way its supposed to.

Turbo outlet temperatures (TOT) The temp of the air post compression from the turbo but before the IC.

Ok so lets assume a 100% effective intake track. 80 degree ambients mean a TIT of 80 degrees. This air is heated as it is compressed for two reasons. 1 is heat soak and 2 compressing air makes heat. How much heat depends on compressor efficiency. I have not seen the maps for these trucks but 70% is pretty typical. So if you figure something like 20 psi boost you are looking at something around 250 degrees for the TOT. From there it goes to the IC. A good IC at highway speed should be ~80% efficient. So based on 250 TOT that gives us a post IC temp of 114. Assuming that the air is not re-heated on the way to the engine then the AIT would be 114.

By painting the pre IC pipe black you may be able to lower the temp of the charge air from 250. You would not want to insulate this pipe. The only time insulating would make sense would be if the under hood temperature were over 250. If you under hood temps are over 250 you have larger issues.

Hope that made at least a little sense.

Maybe I'm describing the hose wrong....:confused: It's the two large metal hoses that come off the intercooler. Maybe they go to the manifold? I'll have to look.

So,,,If I understand this correctly, it would help to wrap them if they go to the manifold? Maybe I need to take a picture tomorrow so we're talking about the same thing.

Ones hot, ones cold. Wrap the cold one.