GT-R R35 Plenum Test Fitment on my VQ37HR

DIGItonium · 06-11-2013, 08:12 AM

Finally sold my intake plenum. Been in my possession for over 2 years. Had to move on with other priorities.

Dwnshift · 06-11-2013, 08:24 AM

Pm sent

SgtGoldy · 06-11-2013, 08:31 AM

You'll be fine, just looking at your build Digi... I think you have enough toys lol.

Chuck33079 · 06-11-2013, 08:36 AM

Quote:

Originally Posted by Dwnshift

Pm sent

Any chance you can get me that info as well? Not in the market quite yet, but I'd love to know what options are out there.

Sh0velMan · 06-11-2013, 08:40 AM

Quote:

Originally Posted by Chuck33079

Any chance you can get me that info as well? Not in the market quite yet, but I'd love to know what options are out there.

Me too.

MyKindaGuise · 06-11-2013, 08:52 AM

Quote:

Originally Posted by Chuck33079

Any chance you can get me that info as well? Not in the market quite yet, but I'd love to know what options are out there.

Everyone is in the same boat. Add me to that list.

For what its worth we added my intake manifold into solid works the other day. Looking into some custom options...

V8Killer · 06-11-2013, 10:54 AM

Quote:

Originally Posted by DIGItonium

Finally sold my intake plenum. Been in my possession for over 2 years. Had to move on with other priorities.

I'll take care of it man! You will see it put to good use. Currently seeking out options for custom fabrication to use with my nitrous kit.

Dwnshift · 06-11-2013, 02:41 PM

New thread being started....
For those that would like info please sub to it.

ChrisUR · 06-13-2013, 03:51 PM

first of all sorry for the long delay again - I had other priorities than my own car for the last weeks.

today I finally found time to continue working on making this conversion as perfect as it can be by constructing a "new" matching strut bar when moving to the GTR manifold.

this is a first glance and far from being finished but just to give you an idea what we are doing currently and to show some progress

thanks for being patient with me - I have ordered the OSIRIS Tuner version and when it arrives we finally are able to make a custom tune and see what gains can be accomplished.

Chris

370Z JT · 06-13-2013, 04:20 PM

I just got a hold of the plenum and engine cover! Looking forward to more details.

Spikuh · 06-13-2013, 05:04 PM

About what I expected you would go for. Seeing it now, a thought just occurred to me. Since the whole brace wraps around the engine on both sides and will cause a bit more flex, could you put in vertical pieces between the brace segments to connect them and pull out some of that flex?

Something like this:

Gibby1113 · 06-13-2013, 05:29 PM

Sweet mother of God ME GUSTA. How much for one of these???

ChrisUR · 06-13-2013, 06:01 PM

@Spikuh

thats a good idea but I'm positive we wouldnt need extra braces when my design is finished. The angled braces left and right running towards the front will be doubled, means 80mm (3.149 inch) width and 20mm height and the horizontal brace will be 60mm (2.362inch) wide and 20mm height (0.787inch).

the material we use is a 2mm (0.78 inch) wall thick hollow square steel pipe.

The welding done by my professional welding friend (who also did the welding for the lower plenum adapter) assured me each welding point he makes between the new brace and the stock brace mounts can hold about 1 ton - we make 12 welding points on each strut tower.

I drove the car without any strut bar after the GTR plenum was in place. You felt a significant difference in driving especially as my car runs 3.5° negative front. Every wheel rut was very annoying.

Then for my last track day I cutted the stock brace horizontal and installed it only connecting the towers to the firewall. That made a tremendous difference and I couldnt feel any disadvantages on the race track - I even drove 2 seconds faster than a few months ago with the stock plenum and stock brace. Even though I had the impression that on a very bad road surface there was a negative effect not having the full brace.

In 2 weeks I'm on the race track again with the completed and fully installed new brace - you will get real world experience and honest reports as always.

Chris

Spikuh · 06-14-2013, 09:57 AM

Quote:

Originally Posted by ChrisUR

@Spikuh

thats a good idea but I'm positive we wouldnt need extra braces when my design is finished. The angled braces left and right running towards the front will be doubled, means 80mm (3.149 inch) width and 20mm height and the horizontal brace will be 60mm (2.362inch) wide and 20mm height (0.787inch).

the material we use is a 2mm (0.78 inch) wall thick hollow square steel pipe.

The welding done by my professional welding friend (who also did the welding for the lower plenum adapter) assured me each welding point he makes between the new brace and the stock brace mounts can hold about 1 ton - we make 12 welding points on each strut tower.

I drove the car without any strut bar after the GTR plenum was in place. You felt a significant difference in driving especially as my car runs 3.5° negative front. Every wheel rut was very annoying.

Then for my last track day I cutted the stock brace horizontal and installed it only connecting the towers to the firewall. That made a tremendous difference and I couldnt feel any disadvantages on the race track - I even drove 2 seconds faster than a few months ago with the stock plenum and stock brace. Even though I had the impression that on a very bad road surface there was a negative effect not having the full brace.

In 2 weeks I'm on the race track again with the completed and fully installed new brace - you will get real world experience and honest reports as always.

Chris

Alright, sounds pretty good. I only mention it as some others were also talking about how these angled braces could/should be a loss of stiffness.

Also, and this can go to anyone really, any idea why the brace mounts to the chasis and not the tops of the suspension towers? A friend of mine mentioned this to me while I was helping him install his 1.5 SC upgrade and I found it odd. I assume that mounting it to the chasis as opposed to the suspensions towers does not achieve the same result, or correct the same "problem", but could be incorrect.

Can't wait to see the new brace.

Chuck33079 · 06-14-2013, 10:03 AM

Quote:

Originally Posted by Spikuh

Also, and this can go to anyone really, any idea why the brace mounts to the chasis and not the tops of the suspension towers? A friend of mine mentioned this to me while I was helping him install his 1.5 SC upgrade and I found it odd. I assume that mounting it to the chasis as opposed to the suspensions towers does not achieve the same result, or correct the same "problem", but could be incorrect.

Just looking at the location of the top of the suspension towers, you would need some funky angles to get it up and around the motor.

06-11-2013, 08:12 AM	#421 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Finally sold my intake plenum. Been in my possession for over 2 years. Had to move on with other priorities. __________________

06-11-2013, 08:31 AM	#423 (permalink)
SgtGoldy A True Z Fanatic Join Date: Feb 2009 Location: Orange County, CA Posts: 3,503 Drives: C63 AMG - LSD Rep Power: 650	You'll be fine, just looking at your build Digi... I think you have enough toys lol. DIGItonium likes this. __________________ C63 AMG LSD - Straight Pipe - EuroCharge v5 - Vossen CV7 - IG: @SuperFastYo

06-13-2013, 03:51 PM	#429 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	first of all sorry for the long delay again - I had other priorities than my own car for the last weeks. today I finally found time to continue working on making this conversion as perfect as it can be by constructing a "new" matching strut bar when moving to the GTR manifold. this is a first glance and far from being finished but just to give you an idea what we are doing currently and to show some progress thanks for being patient with me - I have ordered the OSIRIS Tuner version and when it arrives we finally are able to make a custom tune and see what gains can be accomplished. Chris Spikuh, KaienZ34, 370Z JT and 3 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

06-13-2013, 04:20 PM	#430 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 378	I just got a hold of the plenum and engine cover! Looking forward to more details. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

06-13-2013, 05:29 PM	#432 (permalink)
Gibby1113 Enthusiast Member Join Date: Nov 2012 Location: On open empty highways Posts: 366 Drives: 40th anniversary Rep Power: 13	Sweet mother of God ME GUSTA. How much for one of these??? __________________ 40th anniversary #450/1000 \| Takeda Attack CAI \| Ark DTS exhaust \| to be continued...

06-11-2013, 08:24 AM	#422 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 14	Pm sent

06-11-2013, 02:41 PM	#428 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 14	New thread being started.... For those that would like info please sub to it.

06-13-2013, 06:01 PM	#433 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	@Spikuh thats a good idea but I'm positive we wouldnt need extra braces when my design is finished. The angled braces left and right running towards the front will be doubled, means 80mm (3.149 inch) width and 20mm height and the horizontal brace will be 60mm (2.362inch) wide and 20mm height (0.787inch). the material we use is a 2mm (0.78 inch) wall thick hollow square steel pipe. The welding done by my professional welding friend (who also did the welding for the lower plenum adapter) assured me each welding point he makes between the new brace and the stock brace mounts can hold about 1 ton - we make 12 welding points on each strut tower. I drove the car without any strut bar after the GTR plenum was in place. You felt a significant difference in driving especially as my car runs 3.5° negative front. Every wheel rut was very annoying. Then for my last track day I cutted the stock brace horizontal and installed it only connecting the towers to the firewall. That made a tremendous difference and I couldnt feel any disadvantages on the race track - I even drove 2 seconds faster than a few months ago with the stock plenum and stock brace. Even though I had the impression that on a very bad road surface there was a negative effect not having the full brace. In 2 weeks I'm on the race track again with the completed and fully installed new brace - you will get real world experience and honest reports as always. Chris Reaper42, Spikuh, XwChriswX 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

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