<VV> Turbo exhaust housing heat blanket or wrapping- what'cha think?

jvhroberts at aol.com jvhroberts at aol.com
Fri Nov 26 13:44:09 EST 2010

 Insulating the turbine housing will eliminate a LOT of heat from going into the cooling air intake. Make sure you also get the pipes going in and out of the turbo as well. 


John Roberts


-----Original Message-----
From: Carlton Smith <carlton55 at comcast.net>
To: virtualvairs at corvair.org
Sent: Thu, Nov 25, 2010 1:26 pm
Subject: <VV> Turbo exhaust housing heat blanket or wrapping- what'cha think?

Here is question I have not seen on the VV list before and something to

ponder as you are digesting today. ;-)

I have a 65 Corsa 180 hp turbo that appears to the bystander as stock, but

it actually has a 

E-flow modification. So I can spool up and boost fairly easily.... and am

usually not shy to do so. Fun, fun , fun! 

Now engine temperature is always a concern and the engine running hotter at

highway temps in particular. 

If I am tooling around town and staying out of boosting my head temp gage

gets on the average up to 350-380 degrees. But if I am boosting a lot or up

on the highway going 70 mph the head temp gage can go up to 425-450 degrees.

I have talked with outer turbo owners here with completely stock turbos and

have been on road trips with them too. They all experience the same head

temps under the same driving conditions. So even though I am a boost demon

seems my head temps are normal for a turbo owner. 

Now I go to a lot of car shows in the summer. I stated to notice the water

pumpers with turbochargers having the turbo exhaust housings wrapped with a

woven heat holding material. Some are just wrapped with a banding of this

material and other have sewn blankets to fit the shape of the housing.  Yes,

I understand that holding the heat in aids in a quicker boost that that is

the main concern. However, in the case of our Corvair air intake

compartments and the turbo being in there too with the exhaust housing

radiating heat like mad. Have any of you Spyder, Corsa or turbo racer guys

out there tried putting a turbo exhaust housing heat blanket on and also

wrapped the exhaust pipe within the engine compartment only. I would think

this would eliminate a lot of heated air in the engine compartment being

circulated down in the shrouded engine.

I also understand that wrapping the exhaust pipes outside of the engine

compartment do aid in retaining heat in the pipes and increasing boost.

However, out there it also can retain moisture and rust out your pipes

faster. Inside the engine compartment the rusting of pipe and housing should

not be an issue.

Since in my situation  I get all of the boost I want, all I am interested in

doing is having the engine run a little cooler.

What say ye boys!

Happy Turkey Day!

Carlton Smith

Indianapolis, IN

Circle City Corvairs

1965 Corsa Convertible- 180 Turbo (E-flow)


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