We aren't factory race teams around here - as in likely lower rebuild budgets. JKav in the other thread works for Garrett too aparently, so I guess they are arguing with themselves? Nascar used to wrap headers; and idk if they still do but I don't care either because of the risk. Do whatever you want of course but it seems silly to me.
I think if anything the biggest concern would be rust to the turbo? As a NA guy, headers are pretty cheap [compared to a turbo] so I wrap mine.
Before my first wrap, I did some research and most of my findings point to none-to-little rust UNLESS You the wrap gets wet and the water doesn't evaporate out, leaving it to sit on the header for a while.
My header has been wrapped for 3 years (and re-wrapped once since then) and I have no signs of rust. That includes plenty of wet weather driving and a lot of track time.
I dunno, maybe wraps/blankets aren't best for humid areas, but as long as you are mindful of substantial water, you should be fine for a few years. Just remember you built your car to enjoy it, not to worry about ****.
Well that explains why TDI VNT actuator control units die so often in the diesel Jetta world. Manifold gets so hot it melts the electronics in them.
Unless they changed their design recently, there are no electronics for the VNT near the turbo. The 3 way solenoid valve that moves the actuator is mounted on the firewall near the battery.
The reason the actuator fails is because it is a pulsating ball of suck and fail. The rubber diaphragm in it is prone to dry rotting and cracking from heat. The Rod for the actuator can bind for various reasons, but the worst part is that goddamn mechanical stop mounted on the turbo frame. The turbo wears and the veins shut so far the turbine a/r becomes 0. In order to fix it you need x-ray vision, 30 feet worth of socket extensions, and a crows foot. after you spend 30 hours getting he socket on the adjustment, it breaks off of the turbo because it has fatigues so much from the heat.
I had my Greddy manifold glow once, boosting down the highway with my bandaid setup (pos). I had a bipes ACU + slightly retarded base timing, so basically it was pulling way too much timing and caused it.
Unless they changed their design recently, there are no electronics for the VNT near the turbo. The 3 way solenoid valve that moves the actuator is mounted on the firewall near the battery..
As per a lot of tuners in the TDI world I've talked to the vacuum electronic actuator is the fault in the system since it is hard to relocate the unit away from the heat. They all say to wait going bigger(2260vlk off a Q7) till a solution is found that is reliable.