GT-R R35 Plenum Test Fitment on my VQ37HR

ChrisUR

sorry for the delay guys, I was very busy with other projects during the days so here is the update:

as told it is a lot harder than I thought finding a company who is able and willing to produce the CNC parts for me for a reasonable price.

The idea of making a cast form is good, but first I need to finish at least the prototype so I can test fit and (more important) test drive the GT-R manifold with my adapter to check how it performs.

A cast has a big initial investement even though the mass production is a lot cheaper later on. But before I spend thousands for a form I need to verify if the design we came up with is accurate and if everything works good in the real world.

Test fitment could be done by a wax or PU form but not the test drive and dyno testing. And of course that is what everybody is looking for before I can take orders for the new manifold adapter. I hate the idea of selling something which hasnt prooven to be worth the money under real conditions. No offence against Motordyne, but obviously that is what they did because every article and thread I have read about their M370 talks that you loose power even with a proper tune and the gains in some rpm's are not really worth the effort - and I dont want to offer just another expensive part people are not happy with in overall.

But there may be light at the end of the tunnel, I spoke to a good friend at HWA (they build the SLS GT3 for 24h races and design parts for AMG) and he told me we might be able to lasersinter the complete lower intake manifold out of aluminum powder and this part can withstand at least 15psi and would be the same quality as the stock plastic cast 370Z intake plenum.

I'm currently evaluating what design changes have to be made in order to laserprint the manifold and what the price would be for a prototype.

Will keep you posted !

Chris

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GaleForce

Sounds good, thanks for the update.

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wstar

Awesome, keep it up

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Megan370z

good job ! dont give up

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cc370z

Thank you for all your time! And don't give up!

370Z JT

Any news?

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Unique_Z

^^this

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jezeka777

Any update on this???

ChrisUR

sorry for being so quite for the last weeks - but after I found out that it may be harder to have something produced rather than research and develop I wanted to make sure there actually is some real news to share with you.

well, here is a first glance on the prototype currently in production. Will keep you posted as soon as we have completed the whole unit and going to test fit it on my Z !



Chris

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37Z

I have a few inquiries:

• Is the intake to be a two piece design?
• Is the upper intake plenum to be attached to the stock throttle bodies in the stock location?
• Is the intake plenum to have only two throttle bodies (i.e. stock set-up) or six individual throttle bodies?
• Are the upper intake plenum tube lengths adjustable?
  Have you consider fabricating the intake upper plenum from ceramic material. Porsche did this on the 944 turbo.

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DIGItonium

This adapter is simply a replacement of the lower intake manifold to allow us to bolt on the R35 GT-R intake plenum (collector), and that's just the beginning.

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ChrisUR

thats true - this lower intake manifold will allow you to "simply" install the factory GT-R R35 plenum on the VQ37HR engine.

When everything is finished, test fitted and dyno tested I hope that I can offer a kit which consists of:
- the CNC-machined / hand-welded full aluminum lower intake adapter VQ37HR heads-to-VQ38DETT plenum
- 2 fuel rails with your choice of -6AN / -8AN / -10AN fittings and lines
- all needed gaskets, bolts, washers, etc.
- detailled pictured installation manual (maybe I will do a vid for youtube also)

key aspects of the conversion kit are:
- designed and development with CAD
- computer-simulated and calculated flow optimization
- smooth edges, improved injector spray, equal length runners, largest possible diameter runners, perfect gasket match, blue printed, etc.
- CNC-machined and hand-welded in Germany by a company which produces turbine parts for Airbus aircrafts
- you can use your stock injectors, stock FPR, etc. or you can easily convert to a dual feed / return system
- by using -6AN billet aluminum fuel rails with the stock injectors you optimize fuel delivery even with the stock fuel system
- all sensors, vac lines, etc. can be attached
- stock throttle bodies will fit the GT-R R35 manifold w/out modifications, you only have to shorten your stock intake hoses / aftermarket intake pipes

what I will do for testing is the following:
- dyno my car with the stock manifold
- dyno my car with the GT-R R35 manifold and adapter installed
- dyno my car after a custom tune re-flash with UpRev

I have no real clue yet if and what this conversion will do to a NA car (which I have currently) but I'm 100% sure that a turbo'ed or supercharged car will benefit a lot from this upgrade !

currently I'm waiting for the parts to arrive from the production / assembly, then I will post more pics and keep you updated !

Chris

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ChrisUR

1. well, as the stock fuel rail can't be re-used for fitting issues your choice of two new billet aluminum rails will be included. The smallest rails are -6AN which is slightly more diameter than the stock rails have. I have not tested or evaluated if the stock rails cause any problem but at least it won't hurt.

Of course when it comes to larger injectors you will benefit a lot and as those rails are avail up to -10AN there is much room to grow.

We will use Aeroquip fittings and lines to connect the rails to the stock or an aftermarket FPR - a hard line with fittings will be used to connect the rails from right to left. So it is very easy to run two separate lines to each rail if you want to upgrade to a dual feed system later.

2. yes thats true as the position of the throttle bodies doesnt match the stock location - they are about 5cm / 1.9" more forward towards the front. So if you have like a STILLEN GEN3 you need to cut the pipes by this length to keep the stock MAF sensors in place.

I have a STILLEN GEN3 here myself so when the installation process starts you will see pictures of what modifications are needed. But I try to keep the installation effort as low as and to make this as much PnP as possible.

3. correct, this is "just" the adapter so you are able to install the GT-R manifold. Many people asked me meanwhile if it won't be easier / more effective to do a whole new manifold lower AND upper part together.

Well, of course we could have designed a whole new part and but the idea was to make the GT-R plenum fit the 370Z - that was and still is my personal challenge and whatever comes out at the end of the day I will achieve this goal.

Furthermore our engine and the GT-R engine arent so much different and with the GT-R intake NISSAN developed supports well over 1000HP in the most current setups from tuners like PHR, BL, GReddy, AMS, AAM, etc. - they all keep the stock intake manifold and plenum so I guess and cant be too wrong.

BTW the stock R35 plenum is about $600 new from NISSAN but you can find it around eBay for less than half this price.

Chris

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KaienZ34

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binary0x01

If this pans out I'm gonna buy it.

Over and out...

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