I have pacesetter long tubes ceramic coated, and was curious if wrapping them with header wrap would make it to hot and cause damages.

Would there even be any power gains or is this technique a myth in increasing velocity of exhaust flow, which will increase the velocity of intake charge?

 

I believe it is called "header wrap" for a reason. It will be fine to wrap them, especially since they are already coated.

IMO I don't know if I believe the myth you are talking about, but it will lower the engine compartment temps and could drop your IATs slightly.

 

I would lean towards not wrapping them, since the wrap can trap moisture and cause the headers to rust relatively quickly, coated or not. Holding heat in the pipes is important for turbos since they rely on heat and velocity to spin the turbine, but not so much for NA.

 

This.

It will cause the pipes to rot out a hell of a lot quicker... its why I opted not to on my motorcycle and that has stainless pipes.

 

A way to prevent them from rotting is to seal them.
I have done this on my quad that I use to go through the swamps.
run some hi temp header paint on them, wrap them and then seal them again with hi temp paint.
I ran for a year without sealing it and using wrap and yes it started rotting out the exhaust. I have been running it for a couple years the way I explained and it has held up very well since

 

Great point on the moisture part, I live in a pretty humid environment. Little low on funds now days with student loans needing to be paid off, so I love nearly free upgrades and don't mind spending the time on a project like this, but from what I'm understanding it will eventually cause more harm than good.

I thermal wrapped my CAI and box, helped slightly during the summers, but then again this could be in my head

 

Hmm I might buy a set of used headers and test it out. Would like to do a dyno comparison to see if wrapped headers will make any power improvements verses my pacesetters.

 

I doubt you would see hardly any HP gains but it can help out with your oxygen sensors getting up to temp fast enough. Mine threw some codes about o2 temps.

 

Would you guys recommend wrapping them with a turbo kit? I installed my damn motor and forgot to wrap them with a turbo kit. Can I paint them with high temp? any suggestions?

 

Honestly i have never believed the moisture myth. How can that wrap trap moisture with the pipes get insanely hot. The egt probe in my down pipe reads 900-1200*. Any moisture on that wrap vaporizes.

Turbo guys wrap the hot parts all the time. I have never seen a post of the rotting.