CJ Motorsports VHR Intake Manifold

phunk

The evidence that the stock manifold does really well shows in the dyno graphs this car is able to produce. Guys are making over 350rwhp all motor. That is well over 100hp per liter, and that is with only a 7600 rpm redline.

Intake manifolds are a lot like camshafts, there is no perfect geometry. You can shift the power around with different manifold specs... but unless you started with a really poor design to begin with, you are not going to make power without losing it somewhere too. Manufacturers have overcome much of this effect in camshaft tuning by engineering variable valve timing, lift, and duration systems. Intake manifold geometry can also be variable, but it is not cost realistic for the basic aftermarket performance industry at this time. Most factory equipped variable manifold geometry is hokey at best. Space constraints is one of the largest factors to overcome in manifold design for factory production vehicles. Nissan did a pretty good job with the VHR intake manifold and its packaging. Ugly or not, it works well.

The GT-R manifold is different because its a different car. The GT-R manifold looks like it is built with more torque in mind. Probably because the car is heavier, has a lot more drivetrain drag, and uses a DCT transmission which has some characteristics similar to driving an auto trans. It is also a lower compression engine than the VHR. The GT-R needs more help in the torque department than the 370z does in order for it to feel motivated and exciting.

I suspect that putting the VR38DETT intake manifold on a VHR engine would result in a loss of power, but increase in throttle response and torque.

My manifold will do more than look pretty, but it is not being designed to compete with the stock manifold. Its being designed around a different set of priorities and it might come at a sacrifice of versatility. It is unlikely that I am going to beat Nissan at their own game on this one. I am building mine with different goals.

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Rid3_FaM0uS

Honestly I don't give two shi+s at this point if I find something that out performs the factory intake manifold I need something that is more practical. Lets face it the plastic intake mani is proven to bulge at around 17lbs of boost. While you're right there might not be too many guys out there right now with high HP builds just yet that doesn't mean they aren't on the rise. There are several projects going on right now for guys looking to delve into the deep 600s. You already know you're going to market this from a bling stand point. You also already know that there are plenty people on the verge of needing this from a reliability standpoint(such as myself and potentially topgun depending on. How deep he pushes his, squeeze as well). I really really want one of these and right now it's looking like my only option is to blow up the factory ones until someone markets a stout solution.

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Always under construction. . .

phunk

I do hear that. You guys are going to need something no matter what for higher boost cars. Well its happening... I just took a break from it longer than I originally anticipated.

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Rid3_FaM0uS

Haha you're a gentleman and a scholar Charles! My biggest fear with your talk of ditching the car for a new platform is the car will go and. . . Uh oh back to first base! Im hunting for a Kinetix intake mani for now to hold me over but I would much rather spend the 2000 I'm expecting to spend on something that's still supported by its creator.

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Always under construction. . .

roplusbee

I have yet to dress up my engine bay..........but it will happen eventually. I hope Charles doesn't jump ship on the Z. He is making good power (with his car) and has some of the key upgrades available (that I still need to purchase).

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2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL

Rid3_FaM0uS

I don't think that hell stop supporting what he already has! He's continued to produce copious amounts of fuel delivery parts for the FD and Z33 but it's just hard to do design and R&D a part without having the car you're designing it for. Granted I'm sure he's got plenty of friends with Z34s they would let him have hell I even offered to take my car the 8 hour trip for him to do it on. He's got options though I'm positive of that so I guess I can't be too honestly worried about it.

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Always under construction. . .

phunk

I wont stop producing existing things for the car if I sell mine... but it would make developing anything new for it difficult. I actually do not know anyone else in the area with a 370z!

But either way, my car isnt leaving before the intake manifold is done. It just may or may not get the engine build.

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Cell

I am sort of in the area. LOL

Prototyper5

Wow, I just read this whole thread and I'd like to see it come to fruition like others here...I have the "know how" to build a "very capable" intake manifold but I will admit I Do Not have the capital it would take to see it through, beginning to end, especially for the cnc machine and dyno time. I've helped in prototype a few different intake manifolds for TRD 10 years ago for their effort in the formula atlantic series, props to
Phunk for even attempting this'😉

~Reagan

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Kingbaby

Straight swap...I'm sure without proper tuning is would drag *** to make a power curve to redline...

Many of us are tuned and anyone willing to fork over anything north of 2k is ready to be tuned...

If anything don't recreate the wheel, just make it shiny and metal....make a mold of the OEM manifold and make the cavity of the manifold a mm larger or as much as can be afford while retaining the strut bar!

Screw the strut bar...lay waste to it while you at it...start designing and make a TI strut bar!

We OG's like expensive things

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07 Silver Alloy Nissan 350Z Nismo #0191 "Lin'da"
2amR--------------------> VQ I.N.C. - Like us!

phunk

If the current weather forecast for the next couple days is accurate, it looks like the Z will be back in the shop this weekend to start working on the intake manifold again.

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roplusbee

Boom!

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2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL

Nismo350z#310

Thread bump. I am interested in purchasing a fabbed manifold, mostly for bling purposes. I wouldnt worry so much about gaining HP as I would not want it to lose HP.

I've had it with this waffle.

Phunk (charles?) PM me if you are still working on this and willing to fab something up for the VQ35HR. I am willing to pay. Even as Rod (Kingbaby) stated, even a manifold that is a mold of the OEM with some shinny metal and piping will do.

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2007 TT Nismo 350z, 621whp on 100% stock motor

phunk

I intend to start a new thread this week about the official project!

I have some questions I need to ask all of you, because there are a few decisions that need to be made regarding compromises between cost and ease of fitment and appearance.

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Prototyper5

Can't wait'

~Reagan

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