Turbo compressor pipe

[T1M]

Originally Posted by DR-JEKL

900+ deg C? Hmm nah don't think so..

How hot do you think exhaust manifolds get under full load?

[DR-JEKL]

Originally Posted by einserM

How hot do you think exhaust manifolds get under full load?

TBH I'm not 100% sure what temps the associated hardware gets around the hot side charge pipes in the N54 they definately get hot that's a given, but 900+ nope I honestly don't believe they would get to those temps...

[vtl]

Would definitely be hotter than any silicone pipe would tolerate. Silicone is only rated to around 300C if I remember correctly.

Not an n54 but check out this glowing turbo on a BMW:

[T1M]

Originally Posted by DR-JEKL

TBH I'm not 100% sure what temps the associated hardware gets around the hot side charge pipes in the N54 they definately get hot that's a given, but 900+ nope I honestly don't believe they would get to those temps...

I'll give you a hint. 800*c is a bright cherry red glow. Orange is about 940*c while a mid-yellow is about 1000*c. Now consider manifolds under hard load glow yellow or even towards white, 900*c plus as I said before is rational. Silicone won't take that for long, even the high temp rated stuff.

This is a stock N54 on an engine dyno. Call me cautious but I wouldn't want silicone piping within cm of those manifolds.

[Piets94]

^^cool vid

[DR-JEKL]

I'm not after a war, and I agree it definitely gets hot bout 900+ Deg C nup don't necessarily agree.

Thanks for the hint, I'm actually a metallurgist and have a basic understanding.

It will be interesting to see if the silicon kits can handle the heat, but remember a lot of guys use silicon hoses on the turbo inlets even in race applications (not on the hot side but still the turbos can get quite hot on the exhaust side)

I wouldn't expect short term degradation but in the long term its possible the silicon to degrade and require replacement for sure.

[T1M]

Yeah me either, reading it back I sound like a bit of a dick. Sorry about that 😂

Just to be clear I'm saying the manifold is reaching those temps not the intake piping. What I'm saying is the intake piping is within cm of something that hot, and will cop a lot of abuse as a result.

[flinchy]

Originally Posted by DR-JEKL

900+ deg C? Hmm nah don't think so..

probably not surface temp, but EGT's around the 900c mark aren't really abnormal.

but we're not talking about using silicone for exhaust gases, or having them actually touch the manifold/turbo..?

[T1M]

From my understanding of incandescence, a bright cherry red glow is ~800*C. A yellow glow is ~1000*C. Check out the engine dyno vid I posted above. Those turbo hotsides are >1000*C going by a typical incandescence colour vs temperature chart. On RHD cars the rear turbo's compressor outlet is really close to the manifold itself, cm from the hotside. It's going to cop immense radiated temps.

[DR-JEKL]

Originally Posted by flinchy

probably not surface temp, but EGT's around the 900c mark aren't really abnormal.

but we're not talking about using silicone for exhaust gases, or having them actually touch the manifold/turbo..?

Yeah I agree dude.

EGT of the MB F1 engines are around 1000 deg C (post turbo), and the MB 1.6L V6 turbos supposedly run post turbo EGT's higher than any of the other engine's on the grid.

Not that I was looking for a keyboard joust, I would estimate the headers of the N54's to be <900Deg C, and the video of the N54 displayed that the majority of the headers were still mainly cherry red transferring to an orange which is approaching 900 Deg C.

The associated hardware surrounding the headers would take some time to soak from the radiating thermal energy from the headers and when you apply that to real world driving its extremey rare to be holding the engine at redline at high speeds for minutes on end.

But it's a valid point, the silicon joints would/could degrade over time causing a long term issue and ideally a solid CP would be ideal

[DR-JEKL]

Originally Posted by einserM

Yeah me either, reading it back I sound like a bit of a dick. Sorry about that ��

Just to be clear I'm saying the manifold is reaching those temps not the intake piping. What I'm saying is the intake piping is within cm of something that hot, and will cop a lot of abuse as a result.

Haha its cool dude, some debate can create a good discussion for others to learn from if the debater's remain level headed. I'm all for learning from others

Originally Posted by einserM

From my understanding of incandescence, a bright cherry red glow is ~800*C. A yellow glow is ~1000*C. Check out the engine dyno vid I posted above. Those turbo hotsides are >1000*C going by a typical incandescence colour vs temperature chart. On RHD cars the rear turbo's compressor outlet is really close to the manifold itself, cm from the hotside. It's going to cop immense radiated temps.

Yup that's correct, I only watched the video once, my recollection was the majority of the headers remained an orange like hue, whereas a small portion started to transform to an orange yellow indicating 900+.

Splitting hairs I guess

[T1M]

Yep good discussion for sure. It's VTT that's doing the only full silicone hotside right? I've only seen silicone rated up to 300*c as Vtl said before. The RHD cars hotside piping is mighty close to the rear turbos exhaust manifold whereas the LHD cars piping swings out and away from the rear manifold due to no steering column being in the way. They even clock the compressor housing a out 45 degrees clockwise from factory. Maybe they'll just release it for LHD.

Looks like plenty of clearance. Still be very toasty down that side of the motor. I don't think it could handle being as close as the RHD cars are.

Vtt on LHD engine

http://www.n54tech.com/forums/attach...1&d=1449103044

Pic of RHD hotside piping for comparison

https://www.google.com.au/search?q=f...sSF21uqSsPM%3A

[DR-JEKL]

Originally Posted by einserM

Yep good discussion for sure. It's VTT that's doing the only full silicone hotside right? I've only seen silicone rated up to 300*c as Vtl said before. The RHD cars hotside piping is mighty close to the rear turbos exhaust manifold whereas the LHD cars piping swings out and away from the rear manifold due to no steering column being in the way. They even clock the compressor housing a out 45 degrees clockwise from factory. Maybe they'll just release it for LHD.

Looks like plenty of clearance. Still be very toasty down that side of the motor. I don't think it could handle being as close as the RHD cars are.

Vtt on LHD engine

http://www.n54tech.com/forums/attach...1&d=1449103044

Pic of RHD hotside piping for comparison

https://www.google.com.au/search?q=f...sSF21uqSsPM%3A

Hmm TBH that's the 1st I've seen of the silicon VTT hotside CP's....

I wouldn't touch any of his products personally.... I'm sure some of his products may be OK, just the way he treats his customers and his big ego turns me off from buying anything from the guy.

I was referring to another CP ugrade which by memory were largely solid piping with the end section being silicon piping (I think that's what flinchy was referring to also perhaps?) I was initially going to purchase them and look at upgraded turbos, but then the extra cost of PI and a uprated clutch brought me back to reality somewhat....

By memory the CP were something like this:

http://www.n54tech.com/forums/attach...9&d=1447193008

I didn't research it much further, but yes can see from your link the pipe definately passes very close to the manifold!

[_ink]

Since we are talking about silicon being in the "hot zone", all inlets are pretty much in that vicinity with silicon joiners.

Should this be an item of regular service/replacement?

[T1M]

Maybe, most stock route inlets aren't near the hotside of the turbo though. The inlets that are near the hot parts could be a potential issue? The ones that you need to relocate the radiator bottle to fit I mean.

[_ink]

Originally Posted by einserM

Maybe, most stock route inlets aren't near the hotside of the turbo though. The inlets that are near the hot parts could be a potential issue? The ones that you need to relocate the radiator bottle to fit I mean.

Here's a great pic of how the TFT are situated (slightly different for RHD on the rear pipe) but generally the same.

[taz_nz]

Originally Posted by Kiwi Peter

Around $200

Kiwi Peter Do you still do these jobs?