is thermal wrap worth putting on the dp? i am installing it soon and was wondering if that helps . also any drawback with thermal wrap???

 

I have mine wrapped. If keeps heat out of the engine bay and also keeps the heat in the pipe which means it flows better. Jet hot coating would be a good choice also.

Some people say it shortens the life of the DP but I don't know that anyone has proved it.

 

Thermal wrap is something to consider when you are doing the dp. It should only shorten the life of downpipes made from stainless steel dew to its brittle nature.

 

Thermal wrap only affects the longevity of mild steel DPs that are not ceramic coated. It will hasten rust on them. That is all!

Those in the know, have their DPs ceramic coated and thermal wrapped.

 

Go for it anything that can keep the engine bay with less heat is the way to go; I have some on mine. By the way, some people say it will help rust the downpipe, i find that hard to believe. Show me a picture. THat downpipe get's so hot it will evaporate any water on that covering...
Matt

 

worth putting on - can easily diy

- real cheap mod that keeps our babies running cooler.

 

Get your DP coated with JetHot and then wrap it. As long as you have a stainless steel DP then you won't have any problems. As previously stated it's only the mild steel DPs like the one from HKS that rust when wrapped. And the moisture comes from when you turn the car off and the pipe is hot, not while you're running the car. But once again to answer your question, you really should send the DP off to JetHot to get it coated and you can also wrap it yourself after that if you so desire. The more heat you can keep out of the engine bay the better off you'll be in the long run. Best of luck to you.

Zach

 

hopefully you will never have this problem but if you ever use a extingusher in ur engine bay(lol)and have heat wrap on your exhaust take it off straight after ,had that problem with our old race car and the powder caught in the wrap ate the metal really bad not nice!!

 

Good point, but it's not so much liquid water splashed on the outside of the wrap when the pipe is hot causing problems, but humid air condensing between the wrap and pipe when it is cold.

In this scenario you have corrosion from the inside
AND outside.

Since I live in Arizona that's the last problem you'll see here, but if I lived in anything less than a desert I would absolutely use stainless steel, including the flanges. (which alot of them do not have).

 

Just did this on M2 downpipe. Remarkable how much cooler the engine compartment and transmission hump are compared to stock precat. No data to offer on dp without wrap for comparison, however.