that shape is called a centrifuge or something, it is shaped like that because it accelorates the air into the turbo. You see the same look on webber carborators for that same reason. Air sticks to curved surfaces and is acceltorated into the turbo.

i see... the gasses go through the turbo so fast though do they really have time to cool?

?? that was random.... i didnt say anything about the shape of the exaust housing ^^

he didn't say anything about the exhaust housing... https://www.nopistons.com/forums/pub...1047683561.gif

you would be surprised how much of a difference. Here's an example. My EGT used to sit right at the junction of the "Y" where the front and rear exhaust ports connect on the manifold. I moved it appx 4 inches up on my manifold. My EGTs went down(lost about 100 C!) When I heat wrapped my downpipe, it went up 200 Celsius.



In the case of the picture at hand, I seriously doubt that the "shield" has any effect on keeping the EGTs up.

Do research on the subject



before you start telling people who answer your questions they are wrong and/or make no sense.



some books on thermodynamics/physics might do you some good too.

no need to be an *******, I was just trying to reason this out, I dont think ANYONE is wrong, I mearly say what seems to make sence to me.



thanks for the numbers jspecracer. Form this I understand that wraping the down pipe is a must, shiled the engine bay from bad heat and use it to help the turbo, right

I barely saw any difference in the spool up of my turbo...but it's so big I guess it wouldn't matter anyways. Mainly I did it so I wouldn't burn my hands on the downpipe when taking it off when the engine was still hot. I know I talked to Dragon about it when he had his turbo ZC CRX with heat wrapped exhaust manifold and downpipe. Said the spool up was MUCH better, but his EGTs went out the roof. I only wrapped the downpipe, not my manifold because the manifold I have now is stainless steel...so it has a good chance of warping, which would increase if there was more heat(due to the heat wrapping).

Pengaru is right, take some thermodynamics courses before you argue this subject.



Those heat shields aren't going to help the turbo much, I think, they are mostly meant to protect other components from heat radiating from the housing.

The purple airhorn is sorta like velocity stacks found on Weber carbs