How would the wrap drop egt? doesent it just keep heat from escaping the pipe?

 

+1


You'll see zero drop in EGT unless you're measuring the EGT in the silencer can.

 

no i didnt wrap the entire pipe, and i dunno how it dropped the egt's lol....good question, just seemed to run a lot cooler...

 

Well, here's my take.

Unless a metal heat shield has been made to fit around the turbo very closely and has been insulated on the underside to reflect the heat from the turbo, all you're doing is absorbing heat into the heat shield which will then radiate heat as well.

As an example, not that it necessarily requires any proving... there's a reason the heat shields on your exhaust manifold practically seal around the piping... and if you pull one off, you'll find fiberglass insulation pieces between the exhaust piping and the inner side of the shield.

I am not suggesting metal "roughly covering the turbo area" heat shields are totally ineffective, but I do think a lot of people don't understand the difference between the two approaches.

There's "keeping the heat IN" and there's "kinda keeping the heat around the turbo sort..."

Go touch the top of your metal heat shield at a stop light sometime

 

Could the drop in temperature of air going into the engine from less heat soak lower the temp of the air coming out? could that possibly lower EGT? that would be my only guess.

 

I really don't think so.

I'd be very intrested in the EGT probe placement if someone did see a drop in the EGT with this type of situation. I've seen several people use an O2 bung on an aftermarket downpipe for the EGT probe which would be pretty up there when it comes to being useless.

 

Please educate me on since this is my first turbo car. But be gentle!.

Useless because it's too far downstream to be accurate?