It kinda looks like it's a stock one that's coated with something. Rhino lining mabee?

 

That's great but it looks like just a replica of the OEM plenum which would also replicate the imbalanced airflow. The upside is the air would probably be a little colder with this version since it is plastic or some type of resin. Good find.

 

Is this available? I do not see this or the direct port NOS kit on their site.

 

This is a photo of Nismo Japans S tune upgrade , the plastic MAF sensor is replaced with this new pipe with the sensor a part of it.
Pipe size is up from 70mm to 84mm.
The kit is called S1 & includes new camshafts (no specs), new vairiable inlet camshaft spockets that lift total range of adjustment from 37deg to 50deg.
The new ECU lifts the rev limit to 7000rpm.
New con rod bolts are also supplied.
This information is published in Feb 04 edition of Option magazine.
I cant read Japanese but I think it says 15% power up but it also mentions 300PS which is a lot less than 15%

 

isn't lsdunique making something similar? it's supposed to be cheaper, and not absorb any heat

 

Almost looks like black wrinkle paint.

 

It's just the stock one with the black wrinkle power coat done to it. You can get it done anywhere that does power coating.
Gary

 

according to what I have read so far, the torque comes in a bit sooner than the standard version, though final torque number is unchnaged. It has the S1 ecu (whichnis the one NISMO offers in Japan),new MAF pipe, , but the cam specs are most interested...if I read it correctly, they are using a higher lift and duration for intake vs exhaust, but also are advancing cam timing significantly (my Japanese is not so good, so I cannot tell if its under the variable valve timing, or if its advanced as a base number).

The dispelling part is HP only increases by around 19.


Nathan - have you read antyhing about why such a drastic change in cam specs vs stock? Seems an awful lot of work for such seeminly little gains.

But all this info is good...the more I read and talk to my tuning friends in Japan, the more I am honing in on my eventual setup

 

that's what i kinda thought at first. heheh

 

perhaps it reduces heat?

 

I think that there were some plastic intakes for the F-bodies. Plastic's specific heat is much lower than Aluminum, so heat soak would be less... plus, it would be easier to mold into the right shapes for better airflow.

 

I believe Nismo is claiming 350HP from that motor which is a pretty significant improvement over stock without changing displacement/compression. By all looks the manifold is not a coated version of the stock manifold, I believe it is slightly redesigned.

Gary
Gruppe-S

 

Oh yeah, I'm pretty sure the manifold it not plastic. I feels more like a graphite type coating...

Cheers,

Gary
Gruppe-S

 

what looked different about it compared to stock?

 

they have all sorts of polymers that you could mold that out of. as for the rippled design. I dont know. I could see many on the inside to create turbulance in the air flow? Im not a gas dynamics major.

but there are various high density extremely hard plastics that could be used; some of which could easily be stronger than aluminum(though itself is not a particularly great conductor). you could also use a low density material that could be very light(this isnt exactly a structural part)

other benefit is that you could mold the thing into any damn shape you want. metal is a bit more trouble to do that with.

somewhat offtopic, anyone see the current popular science? with the 3D printers. you could hypotheticly make a cad mock up of your "perfect" plenum; then proceed to print it out. 20$ in "ink" and 5 hours later youd have a part ready to dyno. then use that prototype to make a silicone mold; and proceed to pour it with whatever resin you choose. these things are going to allow some crazy stuff to be made.

 

looking at my g/f's I30, she has a plastic plenum on her car...pretty sweet actually

 

I saw those "printers" at the 2002 SEMA show, where they were also doing a demo. Those things were pretty amazing, though I didn't ask about pricing.

 

the article said about 30,000; but didnt mention how large of a peice they could print. they also said HP is working on a consumer model for 1000$. but Id be highly skeptical on how that would happen.

 

I am an architect in the Quad Cities (Davenport, Bettendorf,Rock Island, and Moline) area and have been in contact with a company that does these specific kind of "printouts". I have also wondered if I could get him to "print" my perfect plenum out? I know that it has an 11 x 17 bed so I don't think it is big enough and I don't want to do it in multiple pieces. I would also need specs to do it in CAD but the cost is around $1500 for the origional. I don't know if I am willing to spend that much. I might wait for the performance companies to come out with one.