Carbon fibre plenum + spacer project
11-07-2009, 12:48 PM
#22
...., I don't have te 6 bolts through the middle, the 2 hoses underneath the back of the plenum are now just joined together so are unused, but the strength of it is crazy, 8-9mm thick is like concrete, you could drive over if and it would be fine, so Im not expecting any to crack unless it had a manufacturers problem which should be very rare.
You might want to do a "drive over" test to prove the strength. The lack of center support will be what allows it to crack. The constant flexing of the plenum is what caused the Kinetix to fail.
It also seems as though 8-9mm thickness of the unit would be reducing the interior airspace, unless you've added a huge internal spacer to take that into account. Then you have to deal with the strutbar clearance. If you left the internal volume the same, added a spacer and include 8-10mm of thickness on the outside, strutbar clearance would really be a problem.
11-07-2009, 01:00 PM
#24
Registered User
Thread Starter
Join Date: Nov 2009
Location: England
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
That may be your undoing, you should consider having the 6 support posts and retain the bolts. Even the Motordyne spacer setup provides 6 supports to fill the gap so the bolts can still hold the OEM plenum tight.
You might want to do a "drive over" test to prove the strength. The lack of center support will be what allows it to crack. The constant flexing of the plenum is what caused the Kinetix to fail.
It also seems as though 8-9mm thickness of the unit would be reducing the interior airspace, unless you've added a huge internal spacer to take that into account. Then you have to deal with the strutbar clearance. If you left the internal volume the same, added a spacer and include 8-10mm of thickness on the outside, strutbar clearance would really be a problem.
You might want to do a "drive over" test to prove the strength. The lack of center support will be what allows it to crack. The constant flexing of the plenum is what caused the Kinetix to fail.
It also seems as though 8-9mm thickness of the unit would be reducing the interior airspace, unless you've added a huge internal spacer to take that into account. Then you have to deal with the strutbar clearance. If you left the internal volume the same, added a spacer and include 8-10mm of thickness on the outside, strutbar clearance would really be a problem.
it has now been used for a few days and no problems so far
11-07-2009, 01:17 PM
#25
How's it going to hold up to heat? I know of a few cases where people left their cars idle for a few hours and discovered their Kinetix plenums melted and collapsed. I know, it's an rare occurance, but the VQ does seem to run hot under the hood. Long term, what are the effects on your material?
11-07-2009, 01:29 PM
#26
First - This reminds me of the Kinetix plenum. They were not stiff enough and after a while, cracks developed in them. Of course, that caused air leaks which caused the engine to run and idle rough.
Second - The rough inside surface looks like it would be a detriment to smooth air flow. You might want to make the inside look finished just like the outside. This is NOT a cosmetic mod.
Third - Before you start offering them up for sale, you'll have to become a vendor/sponsor here. Click on the "Advertise on MY350Z.COM" link at the bottom of any webpage.
Second - The rough inside surface looks like it would be a detriment to smooth air flow. You might want to make the inside look finished just like the outside. This is NOT a cosmetic mod.
Third - Before you start offering them up for sale, you'll have to become a vendor/sponsor here. Click on the "Advertise on MY350Z.COM" link at the bottom of any webpage.
Your gasket would blow out in a few days in FI, not sure about NA.. But lets see a before and after with the gasket. Id like to see if oil builds up or passes through the gasket like the shitty kinetix did!
there is already 2 stabilizer parts in the middle to keep it stiff and they are extended to make sure the plenum does not flex, and it doesn't move, also down the outsides there are 2 ribs also to add extra strength as seen in picture, this wasnt the case to start with, it originally had neither of these andvwhen the car was turned on the plenum got sucked in by over an inch but didn't crack or shatter, this was the reason why we added the ribs and 2 stabiliser bars, and now it doesn't flex at all, the spacer was made bigger to allow for this, it is raised 10mm so yes the strut has has to lifted by around 5mm and everything now sits good in there
it has now been used for a few days and no problems so far
it has now been used for a few days and no problems so far
11-07-2009, 02:19 PM
#27
Registered User
Thread Starter
Join Date: Nov 2009
Location: England
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
Yes these can be made in a 2x2 twill no problem,
Carbon fibre doesn't conduct heat so absolutely no problems regarding heat, I've had it turned over for a while and the plenum is still cool, and the carbon will be as durable, once it's made that's how it stays, it won't corrode or weaken
as for the gasket, the one I'm using so far is a vacuum tape so it's not going anywhere, but i will have to think of something to be able to sell, vacuum tape can get a bit messy,
Carbon fibre doesn't conduct heat so absolutely no problems regarding heat, I've had it turned over for a while and the plenum is still cool, and the carbon will be as durable, once it's made that's how it stays, it won't corrode or weaken
as for the gasket, the one I'm using so far is a vacuum tape so it's not going anywhere, but i will have to think of something to be able to sell, vacuum tape can get a bit messy,
11-09-2009, 06:04 AM
#29
New Member
iTrader: (13)
i think a lot of people are forgetting that most of the "easily broken" cf, is nothing more than fiberglass "look" mods that have CF overlaid... thats not the case with this product, right OP?....i guess also about the point of kinetix plenum melting...that should NOT be a problem with CF...
only concerns are that inside needs to be more polished... how well it seals....and if it has enough mounting points, not necesarly for it breaking but also for how much it seals...It woudl be nice to test and see at what PSI it "pops off"/fails.
only concerns are that inside needs to be more polished... how well it seals....and if it has enough mounting points, not necesarly for it breaking but also for how much it seals...It woudl be nice to test and see at what PSI it "pops off"/fails.
Last edited by IIQuickSilverII; 11-09-2009 at 06:05 AM.
11-09-2009, 10:11 AM
#31
Very good job!
For your torture test, it is best performed with many, many pressure and vacuum cycles. Over and over and over and over again. That means a lot of city driving and preferably with a lot of heat soak. Use a short ram intake with no heat shield. That will get it hot.
I also suggest putting at least 2 bolts through the top panel. This will help immensely with regard to forced induction.
For your torture test, it is best performed with many, many pressure and vacuum cycles. Over and over and over and over again. That means a lot of city driving and preferably with a lot of heat soak. Use a short ram intake with no heat shield. That will get it hot.
I also suggest putting at least 2 bolts through the top panel. This will help immensely with regard to forced induction.
11-09-2009, 03:25 PM
#34
Registered User
Join Date: Apr 2004
Location: N/A
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
i think a lot of people are forgetting that most of the "easily broken" cf, is nothing more than fiberglass "look" mods that have CF overlaid... thats not the case with this product, right OP?....i guess also about the point of kinetix plenum melting...that should NOT be a problem with CF...
only concerns are that inside needs to be more polished... how well it seals....and if it has enough mounting points, not necesarly for it breaking but also for how much it seals...It woudl be nice to test and see at what PSI it "pops off"/fails.
only concerns are that inside needs to be more polished... how well it seals....and if it has enough mounting points, not necesarly for it breaking but also for how much it seals...It woudl be nice to test and see at what PSI it "pops off"/fails.
11-10-2009, 12:47 PM
#37
hahaha i know...the technology difference between F1 CF and consumer aftermarket CF is worlds apart
Well anyways, the CF plenum looks pretty cool, i would want one depending on the price and performance gains...i would compare it to the cosworth plenum to make my purchase decision.
Well anyways, the CF plenum looks pretty cool, i would want one depending on the price and performance gains...i would compare it to the cosworth plenum to make my purchase decision.
Last edited by o2sys; 11-10-2009 at 12:50 PM.
11-12-2009, 12:26 AM
#39
Registered User
iTrader: (1)
Join Date: Jan 2006
Location: san jose, ca
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
How's it going to hold up to heat? I know of a few cases where people left their cars idle for a few hours and discovered their Kinetix plenums melted and collapsed. I know, it's an rare occurance, but the VQ does seem to run hot under the hood. Long term, what are the effects on your material?
