In for a finish!

in for results, Would like to see what gains are on a NA car, I would custom my Stillen Intake and runs this if he makes good gains, :)

Hurry up and finish it already! :bowrofl: Tired of :drool: over this.. :tup:

:icon18::bowrofl::bowrofl::bowrofl: :tup: :iagree:

YEAH!! :yum::icon14::mad:

Chris, someone posted a whitepaper about the balancer tube connecting both chambers of the plenum. Varying the diameter has an effect on the midrange torque. I'm sure messing with this tube is going to take quite a bit of work.

BTW, I have the engine cover and plenum (with balancer tube, which is sold separately) looking for a new home. If I don't sell it, I'm going to put it on my car ;)

Excited to see the results on this.:driving:

I know, I'm just messing with the guy. He won't give us a product until he's made 100% sure it's the best increase possble and safely. I'm all for it. :tup:

I say stop trying to sell it and just put it on! Having been TT we'll see first hand on his car the NA aspects and in your car the TT aspects. :tup:

install it already, :)

:iagree: before and after dyno numbers for both would tell us everything.

True true, looking forward to them. :tup:

I would love to get my hands on one, but I currently don't have the resources to test the product first hand since this is my daily driver.

I'd like to get the GTM 3" down pipes and F.I. turbo exhaust (already have the external wastegates), and then figure out from there. Not there yet... house and yard work is priority.

You could send your car to me for testing... :rolleyes:



Just sayin... :rofl2:

Hell i'd even do a Z exchange program with him. :tup:

Hmmmmmmmmmmmmmmmm..... :icon08:


Especially if Digi wouldn't mind doing an LED swap... :inoutroflpuke:

I know how much he loves doing them. :bowrofl:

Don't forget, we'll need a new oil cap. The new TB location will interfere with the cap. Also, some Dremel work might be needed to clear the oil cap as well.

Done.....

You say that like the oil ever needs to be changed... :bowrofl: :roflpuke2:






:|

Update???

Iam guessing this would cause a slight lean condition.....

Did I hear bullit saying GTM completed the GTR manifold conversion and is ready for completion?

Please do tell. Just got excited.

Yes do tell

Any updates for this? :D

updates?

project was dead before it began.

sorry for the ultra long delay - we were really busy during last year with customer projects so the parts for the GTR manifold laid around in the shelf and catched some dust but finally I brought my car inside the shop to continue/finalize the work !

please find below the pics of phase 1: "disassembly and test fitment" !

please be aware that this is only a very first teaser I show to the public because of so many people asked for progress during the last months I felt I owed you an update. The real work with customization, fitment adjustments etc. will follow during the next days and weeks and I keep you posted if you like. Next steps are welding the lower manifold adapter together, build a template to be able to reproduce, fabricate the new custom -6AN fuel rails, check and do all the piping/hose connections, check all clearances and finally dyno test, uprev tuning and street/track test driving.

but for now enjoy the pics of the disassembly and a first look of the GTR manifold sitting on the VQ37HR engine :tiphat:

http://fbcdn-sphotos-a-a.akamaihd.ne...14375941_o.jpg
VQ37HR engine with stock intake manifold still in place

http://fbcdn-sphotos-f-a.akamaihd.ne...02263899_o.jpg
removed strut bar

http://fbcdn-sphotos-d-a.akamaihd.ne...11737756_o.jpg
removed upper intake piping and plenum cover

http://fbcdn-sphotos-f-a.akamaihd.ne..._1268462_o.jpg
removed upper plenum and throttle bodies

http://fbcdn-sphotos-g-a.akamaihd.ne...39084839_o.jpg
removed fuel rails

http://fbcdn-sphotos-h-a.akamaihd.ne...46109511_o.jpg
removed lower intake manifold

http://fbcdn-sphotos-b-a.akamaihd.ne...18954951_o.jpg
test fitment of the new GTR_370Z lower manifold adapter - not yet welded, just for clearance check

http://fbcdn-sphotos-f-a.akamaihd.ne...55861902_o.jpg
GTR R35 plenum loosely sitting on top of the manifold adapter - final adjustments will be made to clear oil filler cap

http://fbcdn-sphotos-c-a.akamaihd.ne...26954254_o.jpg
the hood closes flawlessly with the plenum in place - not checked strut bar clearance yet.

Cool deal, in for pics/updates.

holy BIG pics man. Was sllooww scrolling to look at these, But I'm in if it fits and makes power for the price it all would cost, Props man

Can we use stock TBs and intakes?

Don't know whether the TB's are the same diameter, but the location is definitely forward from the stock 370 location (meaning an intake system like Stillen Gen3 would need some length cut out of it, or something - it wouldn't fit unmodified).

yes, please continue with updates :)

Sick! I zoomed out so far I can't even read the text on my screen.

How's the oil cap?

sorry for the image size - I linked them directly from facebook and was not aware they display in full resolution :)

the oil cap will get a bit more clearance when the plenum reaches its final position on the upper flange, I hope its enough to open and close it flawlessly otherwise we will revise the design of the lower plenum adapter to push the upper plenum back just a little bit.

the throttle bodies of the GT-R R35 and the 370Z are exactly same - the bolt pattern and the I.D. is a perfect match. Only difference the plastic plenum of our cars use an O-Ring for sealing towards the TB and the GT-R plenum will require a real gasket (OEM Nissan R35).

its correct that the position of the TB is slightly more forward - we tried to push the plenum back as much as possible but you are limited by the rear end of the engine/head, so that is about the max we can go. If you have an aftermarket intakte like STILLEN etc. you easily cut about 2 inch off the piping. For the stock intake with airboxes you should also be able to shorten the piping but that has to be tested later on. To be honest I cant imagine that somebody who is willing to upgrade his/her intake manifold runs stock air intake but you never know ;)

Chris

In for results! Do you have an eta when you might have a working test model?

If you look at the VR38 valve cover, the oil spout is a separate piece attached to it. It is also angled further away from the plenum. Either that or your options for oil caps are very limited. GTM uses a very compact oil cap. It is ugly, but it clears the plenum. The VR38 engine cover definitely needs to be cut to make it easier to access the cap as well. Otherwise, it'll require removal each time.

Do you have the balance tube attached to the plenum? IIRC, someone posted white papers about the intake design of the VR38. It's crazy, but that tube diameter plays a role in affecting midrange torque. If anything, maybe you can fab a custom tube with an adjustable knob one can use to adjust the airflow through the tube. Just an idea... [shrugs].

@DIGItonium

thank you for sharing your thoughts ! You are correct that the oil cap will be a though issue but we will find a solution.

For the balancing tube we will definitely have to fab a custom connection as the stock tube does not clear all the things which are behind the plenum already, most importantly the VVEL motor !

I think we will do 2 options to start with, a pair of block plates to cap the balancing ports and a custom tube which clears with the 370Z engine.

We will then dyno both setups to see how the balancing affects torque throughout the rpm band.

For FI setups you should definitely have the balancing so I can imagine to offer different diameters, e.g. -6AN, -8AN and -10AN so people can play around with these to find the perfect match.

Current time schedule is that we need to weld the lower manifold as one piece and then continue with the fuel setup - this will happen during next week, so more pics are coming next weekend !

Chris

Awesome. I wonder what's the difference between fabricating various diameters of the tube versus a fixed diameter with an adjustable valve to control flow across the tube. Who knows, but hopefully it can save you from fabricating various tubes.

BTW, I hope you have a fuel rail setup that can handle at least 650cc. If I were to do this swap with the new rails I might as well grab larger injectors than the ones I have know. I'm currently thinking about the Injector Dynamics 725cc, but others will probably opt for 1000cc.

I hope you can actually make this happen in the next couple weeks. I have been itching for some more NA mods to come around since I dont want to go FI due to weight and overheating issues. Thanks for taking this on and hope to see a final product I can buy from you guys soon!

@Reaper42
same here - I first wanted to go FI but as I have the 7AT and dont want to upgrade the transmission plus I track the car a lot and am concerned about stability I wanted to max out the NA first. Currently I run headers, cats, exhaust, intake and pulleys and make about 320WHP. The manifold is hopefully the i on the pie which squeezes out the last remaining HPs plus giving a better mid- and end torque. But no question the best benefit will be achieved with this plenum uprade and FI - those guys should see big gains if we made it right.

@DIGItonium
I will investigate if there is a valve that would suit our purpose. If you have an idea what we could use please feel free to share !

For the fuel no worries. We will make a -6AN Dual Rail Setup with DASH fittings in the front. This is completely customable to match any power level up to 800HP and beyond.

The basic setup for NA cars (like mine is currently) will be an Y-adaptor which is connected to the stock fuel pressure regulator and distibutes the fuel evenly to the two rails (remember only 3 injectors are sitting in a -6AN rail. We have build Supras with over 1000HP which are feed by a single -8AN rail with 6 injectors in it !).

The rails will be build so they can take the stock injectors and also every injector which has the same design on the top end. If required I'm able to match the bore for the injector as you wish as every rail will be hand drilled here in our shop.

As the rails have two ports on each end it is even possible to run two separate lines from two fuel pumps (e.g. if you have the CJM fuel pump assembly) to the rails (one pump for one rail) and make the balacing on the other side to even the fuel pressure.

Our setup will also be compatible with fuel return kits where you eliminate the stock pressure regulator and connect either the Y-adaptor to the adjustable FPR or run two lines from the FPR to the rails directly.

hope you like that answer :)

Chris