So my buddy's from CTD fabrication and Turbofx.net they are working on project for my drift car kind of like the Kinetix racing manifold. But this will have way more air flow more response better hp gains. I will keep giving up dates on when this product will be done and the dyno sheets this product will beat the cost of the Kinetix's manifold to here is the site for more information!
http://turbofx.net/1670/nissan-350z-intake-manifold/

 

So this is going to replace the whole plenum? In for updates

 

All I see is a gasket looking thing..

 

I don't think they have a finished product, that gasket wouldn't do anything.

 

hmmm, in for updates

 

^ + 1

 

Guys I think this is going to be an intake not a plenum. I copied this from the top right of their web page:

Nissan 350Z Intake Manifold:

Upcoming sheet metal intake manifold for the 350z.

Item Price: Call Us!
Listed On: July 26, 2011


Sounds like an ARC knockoff intake design but we'll see.

 

How's this any different than Motordyne's 1/4" or 1/2" manifold spacer? http://motordyneengineering.com/prod...products_id=53

It doesn't seem to make much sense to develop an entirely new plenum. You might get more performance gains over existing and well established plenums, but I think they'd be minimal at best. We're talking about an N/A mod on an engine that just doesn't have much room for improvement without FI. The MD spacer gives you maybe +15HP, and the whole spacer/rev-up plenum combo might give you +20? +25? That's close to 90HP/litre, which is about as high as any car out there that's less than 6 figures. Seems like alot of time and effort to get at best another 10 or 15HP.

 

Pretty sure it's not.

 

If your buddies are thinking about increasing the length of lower runners (To the heads) for more low end gain they're going to see a next to nothing gain.. Motordyne has already tested spacers from all ends and all minor modifications to the intake manifold.

- Eric

 

It seems like this has been attempted and resulted in small gains quite a few times but Id love to see a new affective one

 

[QUOTE=BuckeyeInMI;6049052]How's this any different than Motordyne's 1/4"
very smart post Buckeye. here is my thought on plenum spacers. Many people say they could not feel any extra power after installing. some in fact have said they lost torque...Lets just look at what is happening here. 100% of AIR comes in from the back of the motor.. this volumne after moving only about 3 inches is being fed-left and right to the two back cylinders. The VOLUME moving forward has now been reduced to only 66%. And while it is moving forward the two middle cylinders are getting their share. so now the volume has now been REDUCED to only 33% and is now getting sucked into the two front cylinders...It is my belief that the upper plenum is LOWER by DESIGN helping to funnel the AIR downward to the two remaining cylinders. If anything if the roof of the plenun were redesigned more rounded in the front and even LOWER on the top would actually enhance the moving flow of air down to the two front cylinders. The people that sell the spacers are saying the front two cylinders are being starved. YES but not because of the lower roof it is because 66% of the moving volume of air has been stolen by the 4 back cylinders and there is just less volume left for the front 2 cylinders. and last my car runs great...I always think what I could do to make it better but it is my opinion the people that designed the engine knew what they were doing. it is what it is because of design and space constraints.

 

[quote=slim17265;6082220]The airflow percentages you state are not that clear cut. You're right that the two front cylinders are a little starved for air, but the plenum isn't forked, diverting such fixed amounts to each cylinder. It's more like a room with columns running down the middle. Could the plenum be designed for better airflow? Absolutely. But many of those design and airflow "flaws" are minimized with a well designed spacer like the ones MD already makes.

It's very difficult to get close to 100 HP/litre out of an NA engine. The S2000 managed it, but only by having a very steep power curve and very high RPMs. The stock VQ is at about 85, which is at the upper end of production cars. With a set of bolt-ons, you might get a VQ above 90 (~315 crank HP), and with a new exhaust and a good tune, maybe above 95 (~332 crank HP). A new plenum design would still require the same bolt-ons, exhaust, and tune to be optimized, but at best it might add another 10 HP. The cost of this new plenum just wouldn't be worth it. And at the cost of all these NA mods, you might as well go with a basic turbo or supercharger setup and blow well past 100 HP/litre.

 

Hmmmmmm