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01-08-2016, 11:03 PM | #46 |
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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...
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01-08-2016, 11:11 PM | #47 |
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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:
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01-08-2016, 11:47 PM | #48 | |
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This is a stock N54 on an engine dyno. Call me cautious but I wouldn't want silicone piping within cm of those manifolds. Last edited by T1M; 01-09-2016 at 12:17 AM.. |
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01-09-2016, 04:47 AM | #50 |
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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. |
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01-09-2016, 05:31 AM | #51 |
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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. |
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01-09-2016, 08:16 PM | #52 |
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01-10-2016, 12:45 AM | #53 |
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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.
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01-10-2016, 05:21 AM | #54 | |
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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 |
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01-10-2016, 05:28 AM | #55 | ||
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Splitting hairs I guess |
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01-10-2016, 05:41 AM | #56 |
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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 |
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01-10-2016, 06:17 AM | #57 | |
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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! Last edited by DR-JEKL; 01-10-2016 at 06:24 AM.. |
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01-11-2016, 01:48 AM | #58 |
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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? |
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01-26-2016, 10:01 AM | #59 |
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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.
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01-27-2016, 01:03 AM | #60 | |
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