Carbon Fiber Plenum!
#21
Is that what CF looks like when it's not polished? It should have at least 2 bolts in the middle like my crawford plenum does for keeping its structure and sealing integrity I would say. It definitely looks nice, and I don't see why it would need any gains if he just made it w/o the spacer b/c it's such a nice looking piece. How is that one CF/metal plenum constructed (I forget the brand) but it's an expensive one and I think made for FI purposes mostly?
#22
He said the underside is because it's wet laid, but still looks like chop strand to me
. I wouldn't try it mainly because it does have support in the middle. Even the crawford has noticeable flex and it's alum. Unless the thing is done in a vac infusion I would touch it with a stick, especially if your FI.
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
#23
#24
^^^ smooth vs rough has been a debate since the beginning of people polishing or smoothing the inside of plenum... some people insist that dimpled, or otherwise rough surface creates a boundary layer and is advantageous for air flow... others claim smooth surface is better.
I tend to favor nothing more than taking down casting flash and smoothing critical flow points (this is on an aluminum cast piece of course)... but I have seen/read several tests and theories that support the non-smooth theory. Myth Busters happened to do something similar recently (look up dimpled car, or golf ball car). And for the yahoos that think that every time I give an example, its the only example I have - no stupid, its one of many examples, I'm just not going to post a half dozen of them (that's not directed at you Johnny).
How are you btw - long time no talk to... looks as though your car has come a long way! Congrats
I tend to favor nothing more than taking down casting flash and smoothing critical flow points (this is on an aluminum cast piece of course)... but I have seen/read several tests and theories that support the non-smooth theory. Myth Busters happened to do something similar recently (look up dimpled car, or golf ball car). And for the yahoos that think that every time I give an example, its the only example I have - no stupid, its one of many examples, I'm just not going to post a half dozen of them (that's not directed at you Johnny).
How are you btw - long time no talk to... looks as though your car has come a long way! Congrats
![Biggthumpup](https://g35driver.com/forums/images/smilies/biggthumpup.gif)
#25
I believe that there are benefits to both the polished and non-polished options. That said, I believe there are spots where it is good to be polished and spots where you might want to have some rougher areas.
That said, the construction of the carbon fiber plenum looks like it is fiberglass inside, not full carbon fiber.
That said, the construction of the carbon fiber plenum looks like it is fiberglass inside, not full carbon fiber.
#26
I believe that there are benefits to both the polished and non-polished options. That said, I believe there are spots where it is good to be polished and spots where you might want to have some rougher areas.
That said, the construction of the carbon fiber plenum looks like it is fiberglass inside, not full carbon fiber.
That said, the construction of the carbon fiber plenum looks like it is fiberglass inside, not full carbon fiber.
#27
#28
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
for what ever that's worth ~
Thread
Thread Starter
Forum
Replies
Last Post
thechitoguy
G35 Sedan V35 2003-06
12
10-01-2015 05:25 PM