GT-R R35 Plenum Test Fitment on my VQ37HR

DIGItonium · 04-15-2013, 04:53 PM

No worries. I wouldn't miss the strut bar if a better and track tested one can be fabbed like the one used in the GT-R. Maybe you can fab a "hood window" to show off the bling haha.

Looks like I'll be keeping my GT-R intake collector since no one wants it

G37sHKS · 04-15-2013, 05:54 PM

Quote:

Originally Posted by ChrisUR

it looks like we found a way to keep the stock fuel rails so the upgrade gets more affordable and less complicated. You can of course use different rails, but its not a must anymore !

the oil cap now clears nicely so no new cap is needed !

as the upper flange is made to fit the GT-R manifold you should be able to use every aftermarket plenum like Greddy, Boostlogic, etc. unless its a lot higher.

Currently the only real issue we are facing is that the strut bar doesnt fit over the plenum anymore so we need to fabricate/modify it.

Chris

Cant wait!

Good news is i can still use my GTM high flow rails!

Now the questions is whats the best plenum out there for R35?

Kingbaby · 04-15-2013, 06:48 PM

the stacks on the runners look like their can be a little shorter(not a machinist)? I remember the DE Z33 guys would rise the strut bar with a thick washer to keep the strut bar after a Motordyne spacer. How much off it the strut bar away from fitting?

Anyone who does this mod know what their geting into....

If the oil cap was an issue that can be cut and rotated towards the front, and most of the wires underneath the manifold can be re routed...

in for more...

SPOHN · 04-15-2013, 08:07 PM

Quote:

Originally Posted by critical

tell me there's a better looking mod than that?

Looks don't make HP. IMO ( as much as I'd like to see results) manifolds only benefit with FI.

Kingbaby · 04-15-2013, 08:28 PM

Quote:

Originally Posted by SPOHN

Looks don't make HP. IMO ( as much as I'd like to see results) manifolds only benefit with FI.

not necessarily, Sasha showed that the VQ can do with a better flowing manifold...

seen here...
Popping the Top for 360whp - YouTube

Also I haven't seen any before or after dyno to back this but it makes sense

Intake Manifold Runner Clean Up - MY350Z.COM Forums

ChrisUR · 04-16-2013, 04:13 AM

as said previously I dont know what this upgrade will do in real life although I have an idea or at least hope

The runners in the stock lower manifold are squares and not really "flow improved" and they have "dents" inside for the bolt threads. The upper manifold is widely open and jagged inside so that air can flow everywhere and is not directed but only collected.

The GT-R manifold provides air flow from the throttle bodies inside the outer collectors and then divide the air into 2x3 runners where it can accelerate and is not swirled. A continued round shape provides maximum flow vs. the angular design.

For a natural aspired engine the most important thing regarding air intake is to provide as few restrictions as possible - even better is to create a situation where the engine is offered more air than it would naturally aspire, called "ram air" and is e.g. used in motorcycles. You try to force a positive pressure into the cylinders which is nothing else than a turbocharger does by brute force.

It may be that Nissan rocket engineers have calculated and designed the manifold to create maximum torque and power and that my upgrade does nothing good but from a common sense I would say we actually will see an improvement of any kind whatsoever.

But Spoon is absolutely correct - this mod has proven nothing yet and until we put the car on the dyno and compare with our runs before nobody can say it was worth the money and the effort.

@Kingbaby
the runners cannot be any lower because otherwise the upper plenum will hit the valve covers - we chose the lowest position it can go. First I was hoping to work with strut bar spacers but it showed that the GTR manifold is a lot higher than stock plus doesnt have the notch for it like the stock one has plus the stock plenum is angled towards the front while the GTR sits at a constant level.

tomorrow we will continue the welding on the lower adapter and today the upper plenum goes to the powdercoater. Stay tuned for more pics soon !

Chris

SPOHN · 04-16-2013, 06:48 AM

I hope for the best

ts-c63 · 04-16-2013, 08:10 AM

Can't wait for the results

DIGItonium · 04-16-2013, 09:41 AM

Will you be able to have tooling to make it easier to produce this part?

Spikuh · 04-16-2013, 10:34 AM

This is how feel this morning:

(You can swap USA flag for general saluting, but we don't have a saluting face by itself)

Huck · 04-16-2013, 11:17 AM

This looks super sexy in the engine bay, nice work.

Sent from my iPizzle using magic and new-fangled science stuff

ChrisUR · 04-16-2013, 11:28 AM

yes of course we will fabricate a rag so we can easily reproduce the adapter when everything works out !

ChrisUR · 04-16-2013, 04:41 PM

following Spikuhs suggestion I have updated the first post in this thread with information about parts needed to do this conversion plus a link to my facebook album for all pics from the very beginning until the most current state.

Spikuh · 04-16-2013, 05:15 PM

Quote:

Originally Posted by ChrisUR

I will start a list of parts here you need to install the GT-R IM Conversion - this will be updated until the project is finished:

from ChrisUR Germany
1x lower GTR_2_Z33 Manifold Adapter
4x fuel rail holder for stock or aftermarket rails
2x 10mm to 6mm Hose Connectors
Xx Hose to connect to all vaccuum and water ports on the R35 plenum

from Nissan (I can also supply them with the kit)
1x - R35 Intake Manifold Plenum*1
1x - R35 Engine Cover*2
6x 16618EA000 - Z33 O-Ring Injectors
6x 166188J000 - Z33 O-Ring Injectors
1x 1661810V10 - Z33 O-Ring Fuel Pressure Regulator
2x 16175ET80A - R35 Throttle Body Gasket
1x - R35 Manifold to Plenum Gasket
2x - Z33 Head to lower Manifold Gasket

*1 you may also use 3rd party products e.g. GReddy, BoostLogic, etc. (fitment not verified yet)

*2 optional you can buy a carbon fiber cover like this from eBay

Just a suggestion. Since your initial post on the first page has a lot of broken images, you could replace it with all this information.

XwChriswX · 04-17-2013, 12:41 AM

Just a thought, but shouldn't those say Z34, not 33? Or are they parts from a 350 instead?

04-15-2013, 04:53 PM	#226 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	No worries. I wouldn't miss the strut bar if a better and track tested one can be fabbed like the one used in the GT-R. Maybe you can fab a "hood window" to show off the bling haha. Looks like I'll be keeping my GT-R intake collector since no one wants it __________________

04-16-2013, 04:13 AM	#231 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	as said previously I dont know what this upgrade will do in real life although I have an idea or at least hope The runners in the stock lower manifold are squares and not really "flow improved" and they have "dents" inside for the bolt threads. The upper manifold is widely open and jagged inside so that air can flow everywhere and is not directed but only collected. The GT-R manifold provides air flow from the throttle bodies inside the outer collectors and then divide the air into 2x3 runners where it can accelerate and is not swirled. A continued round shape provides maximum flow vs. the angular design. For a natural aspired engine the most important thing regarding air intake is to provide as few restrictions as possible - even better is to create a situation where the engine is offered more air than it would naturally aspire, called "ram air" and is e.g. used in motorcycles. You try to force a positive pressure into the cylinders which is nothing else than a turbocharger does by brute force. It may be that Nissan rocket engineers have calculated and designed the manifold to create maximum torque and power and that my upgrade does nothing good but from a common sense I would say we actually will see an improvement of any kind whatsoever. But Spoon is absolutely correct - this mod has proven nothing yet and until we put the car on the dyno and compare with our runs before nobody can say it was worth the money and the effort. @Kingbaby the runners cannot be any lower because otherwise the upper plenum will hit the valve covers - we chose the lowest position it can go. First I was hoping to work with strut bar spacers but it showed that the GTR manifold is a lot higher than stock plus doesnt have the notch for it like the stock one has plus the stock plenum is angled towards the front while the GTR sits at a constant level. tomorrow we will continue the welding on the lower adapter and today the upper plenum goes to the powdercoater. Stay tuned for more pics soon ! Chris Kingbaby, JC671, AlexRaymond19 and 2 others like this. __________________ ProStreet N1 exhaust \| ProStreet N1 Y-Pipe \| STILLEN G3 Intake \| NST Pulley Kit EIBACH Pro-Springs \| EIBACH Pro-Spacers \| EIBACH Sway Bars \| SEIBON GT2 Rear Wing MOCAL Oil Cooler 25row\| STILLEN TransCooler \| STILLEN PS Cooler \| STILLEN Front Fascia

04-16-2013, 06:48 AM	#232 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	I hope for the best Spikuh likes this. __________________

04-16-2013, 09:41 AM	#234 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Will you be able to have tooling to make it easier to produce this part? __________________

04-16-2013, 11:17 AM	#236 (permalink)
Huck A True Z Fanatic Join Date: Jan 2012 Location: Cocoa, Florida Age: 42 Posts: 5,075 Drives: Pantydropper machine Rep Power: 33	This looks super sexy in the engine bay, nice work. Sent from my iPizzle using magic and new-fangled science stuff __________________ VLEDS \| Evo-R \| Moddiction \| CF Hood Struts \| F.I. CF CBE & LTH \| Stillen CAI \| NST Pulleys \| UpRev \| Z1 \| M7 \| Status \| Forgestar \| PSS \| Whiteline \| SPL \| SPC \| Kenwood \| Zenclosure \| Kicker \| Alpine Type R

04-16-2013, 08:10 AM	#233 (permalink)
ts-c63 Enthusiast Member Join Date: Feb 2011 Location: nyc/nj Posts: 384 Drives: 2012 370z 7At Rep Power: 14	Can't wait for the results

04-16-2013, 11:28 AM	#237 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	yes of course we will fabricate a rag so we can easily reproduce the adapter when everything works out ! DIGItonium and G37sHKS like this. __________________ ProStreet N1 exhaust \| ProStreet N1 Y-Pipe \| STILLEN G3 Intake \| NST Pulley Kit EIBACH Pro-Springs \| EIBACH Pro-Spacers \| EIBACH Sway Bars \| SEIBON GT2 Rear Wing MOCAL Oil Cooler 25row\| STILLEN TransCooler \| STILLEN PS Cooler \| STILLEN Front Fascia

04-16-2013, 04:41 PM	#238 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	following Spikuhs suggestion I have updated the first post in this thread with information about parts needed to do this conversion plus a link to my facebook album for all pics from the very beginning until the most current state. __________________ ProStreet N1 exhaust \| ProStreet N1 Y-Pipe \| STILLEN G3 Intake \| NST Pulley Kit EIBACH Pro-Springs \| EIBACH Pro-Spacers \| EIBACH Sway Bars \| SEIBON GT2 Rear Wing MOCAL Oil Cooler 25row\| STILLEN TransCooler \| STILLEN PS Cooler \| STILLEN Front Fascia Last edited by ChrisUR; 04-16-2013 at 06:36 PM.

04-17-2013, 12:41 AM	#240 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 452	Just a thought, but shouldn't those say Z34, not 33? Or are they parts from a 350 instead? ChrisUR likes this. __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

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