Just thinking about heat sheilds or wraps for the tubs.after all if the tubs have to be replaced then ideal time a to keep the heat and temp down a lttle a.anyone one here got or have used them.

The stock manifolds have heat shields on them. I think I read it's not very good for the turbo to insulate it too much as it can damage it. I only have two heatsheilds left, one above the exhaust mid pipes to reduce cabin temperatures and one by the brake master. I binned the rest a while ago.

Now see im waiting for someone particular to comment cas theres alot of comments on some other sites about upgraded tubs etc and the extra heat the produce

I'm with Stephen, I can't see insulating heat into the turbos being healthy for their lifespan or efficiency. I can see the benefit of wrapping the manifolds, although it would be interesting to compare various parameters with and without the turbos fully wrapped.

I wonder if anyone (on any car) has ever used an enclosed, shrouded duct that forces ram air to and from a turbo for additional cooling?

Well the reason i asked.years ago i used to have a few or had owned a few renualt five turbo.and they all seem to have acssevive heat shields and or blankets.and apart from protecting your oil lines and other including wires.etc under the bonnet.i thouht that they were also desined to work more affishant.a bit like why cats dont work in this country cas they never get hot enough.but thats another story.there must be a reason other than underbonnet temps soaring.and anyway even if this is the case i hate espeacally in the summer months after a spirited drive.the temps under there cant be good surly.be better if they were insulated.or is it just a money making game.to have you tubs all nice and cosy.

The turbos are designed to run at the exhaust gas temp and don't forget this heat is coming from inside the turbo so the fan, bearings etc are already at this temp.

 

Thermodynamically speaking, keeping these gases hot (i.e. not allowing them to get cooled by a cool turbo) is better.

 

A quick google found this site - yes it's trying to sell their product, but the info seems to be pretty much logical. http://ptpturboblankets.com/why_turbo_blankets.php

For demonstrative purposes only. Please do not try this at home. It's never a good idea to place a hand on an engine that is running . . .

Edited October 13, 201411 yr by Gio

Have the manifolds & downpipes ceramic coated. Less energy dissipation prior to the the turbine (aids spool), plus a hot gas travels more quickly than a cool gas (faster removal of exhaust gasses).

 

Doubt you will find blankets small enough for stock fitment Zed turbos :laugh:

 

Some people say ceramic coating the turbine housing or using a blanket can contribute to bearing failure.

 

All above methods will reduce under-bonnet temps, which prolongs electrical connections and will help contribute to more power if the difference is enough to lower intake charge temps.

FYI I had my manifolds, turbine housing and downpipes coated, makes a huge difference to engine bay temps.

As i thought then.