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weight reduction 2021, questions for veteran GT-R owners

weight reduction nismo wheels carbon fiber

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#1 Jintei

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Posted 18 April 2021 - 01:14 AM

GTR side.jpg Ok so first off, after reading about Super GT , their cars use 2.0 L turbos , so i'm not expecting to get down to 1070kgs.

However yes I've read the old threads but I'm trying to revive this topic.

 

So I have some questions since I have only owned the car for 9 months.

 

My plan is to still keep the interior and a daily-able car, but I'm willing to change the driver / passenger seats in the future , but thats pretty much it for interior, not going to remove carpets etc.

I have already made a carbon fiber center console and removed the old aluminum one because it was peeling.

 

I may or may not remove the rear seats. They seem to be just foam and almost no point in removing them since it seems already extremely light, however if someone tells me to lose em ,lol I will custom make carbon fiber rear seat-ish covers. Since there is absolutely no room for anyone to sit back there anyhow.

 

I want to get the weight down as much as possible.

Is a goal of 1400 kgs realistic?

 

I have a stillen exhaust system catless, and no mufflers . 

 

I have BBS LMs which should save some weight over stock rims #26 lbs, however would the nismo wheels save more weight then my BBS ? 

 

I have a set of lightweight 19x 9.5 square setup wheels #19.5 lbs (rim alone) , is it possible to use these with a thicker sidewall tire without causing damage to the Traction control system? 

I plan on changing the rotors over to girodiscs.

 

I plan on swapping as much bodyparts to carbon as possible.

 -the rear trunk, hood, fenders, and lastly doors

 

 I will be making a customer carbon fiber wing , front wing, and rear diffuser , side splitters.

And I also plan on swapping the rear glass to lexan but keeping the front glass for safety reasons.

 

after searching I am not 100% sure if our cars come with a carbon fiber main driveshaft or not??

 

maybe if someone can chime in and help me with some of these questions?

 

*** I AM willing to cut out , unbolt  parts of the frame to swap to carbon fiber . Has anyone had experience swapping out the subframe? *** I might be planning on building a carbon fiber subframe ***

 

I am obsessed with power to weight ratio.

 

I would rather lighten this thing before I tune the ECU.

 

Thanks for any help / advice you can offer B)

 

 

 

 


Edited by Jintei, 18 April 2021 - 01:16 AM.

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#2 droptopp

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Posted 18 April 2021 - 12:05 PM

http://www.gtrheritage.com/topic/2076-buschur-racing-weight-thread/
Cicio Performance billet Crank 4.1 w/ CP billet pistons, Zenith R turbos, Cicio wet sump oling upgrade, flex fuel, ETS mid, down pipe, race FMIC, STM titanium axle back, ID2000s, Shep One K with drop gears, DS Axles, Volk Saga 18 10/12 (MT ET Streets), Advan GT Premium 20 R888. 1450+ hp / 1210+ tq

Old setups : more AMS motors than anyone I know - Alpha 9 w/ AMS 3.8, GTX3582R Gen II w/ AMS 4.1 billet crank, GTX3582R Gen II w/ AMS 4.0 big bore billet crank and of course FBO E85.

#3 Phangstaz

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Posted 18 April 2021 - 12:56 PM

Topic has been beat to death already. Do the overtake full carbon conversion, ceramic brakes, tillet seats, light weight battery with light weight wheels, should get you to around 1480kg.

Add the AK tube subframes, replace intake manifold with JCR carbon, replace intercooler/intake piping with titanium or carbon, should be close to 1400.

Bulletproof's Overtake carbon car was around 1490 with full interior.

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#4 *14TrakEDN*

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Posted 18 April 2021 - 06:21 PM

Tillet seats aren't very good for circuit track.
Blankets can be used in the rear seat area,or nothing at all.
Get rid if rear safety belts,subwoofer and plastic side panels in the rear.A race battery will save about 20lbs.Rotors are a must for circuit track.
Its expensive to lose weight.
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#5 Jintei

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Posted 18 April 2021 - 07:27 PM

OOOo i like! 1480 kgs is do-able then ? :)

 

Topic has been beat to death already. Do the overtake full carbon conversion, ceramic brakes, tillet seats, light weight battery with light weight wheels, should get you to around 1480kg.

Add the AK tube subframes, replace intake manifold with JCR carbon, replace intercooler/intake piping with titanium or carbon, should be close to 1400.

Bulletproof's Overtake carbon car was around 1490 with full interior.


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#6 Jintei

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Posted 18 April 2021 - 07:29 PM

I like that. i still want to keep my interior, but i dont mind swapping out the seats., I have read the older threads but i had a few questions of my own.

 

Topic has been beat to death already. Do the overtake full carbon conversion, ceramic brakes, tillet seats, light weight battery with light weight wheels, should get you to around 1480kg.

Add the AK tube subframes, replace intake manifold with JCR carbon, replace intercooler/intake piping with titanium or carbon, should be close to 1400.

Bulletproof's Overtake carbon car was around 1490 with full interior.


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#7 Jintei

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Posted 18 April 2021 - 07:30 PM

Thanks for that.

 

http://www.gtrheritage.com/topic/2076-buschur-racing-weight-thread/


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#8 richj92

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Posted 19 April 2021 - 05:51 PM

If you are willing to put in the work, visit this ( https://www.camaro5....ad.php?t=285800 ). A lot of pages to go through but there are tons of ways to save weight that no one thinks of. To give you an idea of what this thread has to offer, he disassembles the entire 5th gen Camaro (literally 100% of it) and goes as far as sanding off the letters and numbers that are in the casted pieces. Good luck!

Edited by richj92, 19 April 2021 - 05:53 PM.


#9 Geno88

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Posted 19 April 2021 - 07:50 PM

If you are willing to put in the work, visit this ( https://www.camaro5....ad.php?t=285800 ). A lot of pages to go through but there are tons of ways to save weight that no one thinks of. To give you an idea of what this thread has to offer, he disassembles the entire 5th gen Camaro (literally 100% of it) and goes as far as sanding off the letters and numbers that are in the casted pieces. Good luck!

Thank you for this. I tried to do the same with my 69 Camaro, but NOTHING like this example. OMFG this is unbelievable.

 

OP - Many forget to remember that the "owner/driver" can also stand to lose weight. If you're going through such extreme, are you also on a strict plan to be in best shape possible? I dont know you but it's just food for thought!


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#10 Jintei

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Posted 25 April 2021 - 07:07 PM

Thanks !

If you are willing to put in the work, visit this ( https://www.camaro5....ad.php?t=285800 ). A lot of pages to go through but there are tons of ways to save weight that no one thinks of. To give you an idea of what this thread has to offer, he disassembles the entire 5th gen Camaro (literally 100% of it) and goes as far as sanding off the letters and numbers that are in the casted pieces. Good luck!


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#11 gtrbillet

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Posted 25 April 2021 - 08:00 PM

The aluminum bulkhead behind passenger seats is actually quite heavy. I believe the n attack gets a carbon fiber version. I’ve made an ultra lightweight replacement for another forum member going for massive weight reduction.
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#12 hunter

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Posted 26 April 2021 - 08:27 PM

http://www.gtrheritage.com/topic/2076-buschur-racing-weight-thread/

This is the right place to start......... 1400 kw is not possible without big bucks............ including all new front and rear sub frames..........1600 kw and 20k dollars  in hp gains will do it. 800 whp and 3400 pounds will win the wars........It will cost 60k to get to this...


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#13 GTRFan1

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Posted 02 May 2021 - 04:51 PM

The aluminum bulkhead behind passenger seats is actually quite heavy. I believe the n attack gets a carbon fiber version. I’ve made an ultra lightweight replacement for another forum member going for massive weight reduction.

 

Can you share more details on this?



#14 gtrbillet

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Posted 03 May 2021 - 08:34 AM

I had a project with the objective of weight reduction while keeping a stock "sleeper" look on a Nismo.  While looking for areas to cut weight it was discovered that the aluminum piece behind the back seats was quite heavy.  Well over 20 pounds if I remember correct.  The car had already deleted the rear seats but wanted to keep the OEM subwoofer enclosure with cover piece/grills.    I machined a piece from sheet aluminum and bent and welded to replace the factory subwoofer mount.  The replacement piece was about 2.5 pounds. a1140a737db7a2d66ffb7e8b321e4742.jpg

Edited by gtrbillet, 03 May 2021 - 08:39 AM.

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#15 gtrbillet

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Posted 03 May 2021 - 08:40 AM

6d4f55c43475266adb486c328a4c17ea.jpg
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#16 gtrbillet

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Posted 03 May 2021 - 08:41 AM

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#17 gtrbillet

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Posted 03 May 2021 - 08:41 AM

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#18 gtrbillet

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Posted 03 May 2021 - 08:42 AM

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#19 gtrbillet

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Posted 03 May 2021 - 08:46 AM

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#20 droptopp

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Posted 03 May 2021 - 12:42 PM

Cool stuff !!!
Cicio Performance billet Crank 4.1 w/ CP billet pistons, Zenith R turbos, Cicio wet sump oling upgrade, flex fuel, ETS mid, down pipe, race FMIC, STM titanium axle back, ID2000s, Shep One K with drop gears, DS Axles, Volk Saga 18 10/12 (MT ET Streets), Advan GT Premium 20 R888. 1450+ hp / 1210+ tq

Old setups : more AMS motors than anyone I know - Alpha 9 w/ AMS 3.8, GTX3582R Gen II w/ AMS 4.1 billet crank, GTX3582R Gen II w/ AMS 4.0 big bore billet crank and of course FBO E85.



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