The 370Z Weight Reduction Thread
 

The point of this thread is to create a list of the weights of different stock parts and aftermarket parts for everyone's reference. People can post up what they are doing to reduce weight and ANY information about the weight changes achieved. The aim is to create an extensive list. I'll keep track of this thread as much as possible to keep the list up to date.

LBS/KG CONVERTER TOOL


STOCK PARTS:

Engine:
Full Stock Exhaust: 49.3lbs (25.4kg)
Stock Cat: 21lbs (9.53kg)
Stock Battery: 35lbs (15.88kg)

Stock Exhaust

Muffler Section - 26.8lbs (highly inefficient)
Y-Pipe - 11.6lbs
Resonated Y-Pipe - 15.6lbs
Total: 54.0lbs



NISMO Cat-back 'H' Pipe [Midpipe] = 17.2 lbs
NISMO Cat-back Rear Muffler Section [Can] = 35.2 lbs
NISMO Cat-back Front 'Y' Pipe [bolts to cats] = 13.6 lbs
Suspension:

Stock Rear Camber Arms: 2lbs (0.91kg)

Body:

Rear Under bumper Charcoal Filter Cover/Shield = 0.4 lbs
Hood 16lbs

Interior:
Base/NISMO Seat with integrated SRS airbag = 42.4 lbs
Airbag assembly from SRS Seat = 1.6 lbs
Base/NISMO Headunit/Radio = 2.6 lbs

Touring Package Leather Heated Seats (TPH): 47lbs (21.32kg)
Touring Package Bose Subwoofer: 8lbs (3.63kg)
Tools & Mats: 7lbs (3.18kg)
Privacy shade thing out of the hatch area 3lbs
Trunk Plastics - 15lbs
Hatch Weight - 2 lbs

Miscellaneous:

- Sport Package Wheels/Tires -
Front Wheels (Sport Package) + Stock Bridgestone RE050A (245/40/19): 52.2lbs (23.68kg)
Rear Wheels (Sport Package) + Stock Bridgestone RE050A (275/35/19): 56.8lbs (25.76kg)
Front Wheels (Sport Package): 23.2lbs(10.52kg)
Rear Wheels (Sport Package): 23.8lbs (10.8kg)
Front Stock Bridgestone RE050A (245/40/19): 29lbs (13.15kg)
Rear Stock Bridgestone RE050A (275/35/19): 33lbs (14.97kg)

Emergency Spare Wheel/Tire: 35lbs (15.88kg)

Stock Lug nuts 3lbs


AFTERMARKET:

Engine:

- Exhaust -
MCR Crimson Titanium Exhaust: 29.5lbs (13.4kg) | Reduction: -19.8lbs (-8.9kg)
Power House Amuse RS Silent Exhaust (STTI): 30.3lbs (13.74kg) | Reduction: 19.0lbs (8.62kg)

STILLEN Exhaust
Muffler Section - 39.6lbs (proven huge hp gains)
Y-Pipe - 11.3lbs
Resonated Y-Pipe - 14.4lbs
Total: 65.3lbs

Difference: +11.3lbs and 18whp

~Berk exhaust:
-Muffler: 32.2lbs
-X-pipe: 12.2lbs
-Resonators: 8.8lbs each (17.6lbs total)
-Bolts & Gaskets: 1.2lbs
Total: 63.2lbs

~Fast Intentions exhaust:
-Whole exhaust with SS mufflers: 47lbs
-Whole exhaust with Carbon fiber mufflers: 41lbs

~Fast Intentions Long Tube headers:
-Whole piece: 21lbs (Per thread a recorded weight loss of 17lbs total)
Suspension:


Body:


Interior:

- Reclining Seats -
Recaro Speed: 30.9lbs (14.02kg) | Reduction: (TPH) -16.1lbs (7.3kg)
Recaro Sports: 37.5lbs (17.01kg) | Reduction: (TPH) -9.5 (4.31kg)
Bride LowMax GIAS: 24lbs (10.89kg) | Reduction: (TPH) -23lbs (10.43kg)
Bride Brix II: 45lbs (20.41kg) | Reduction: (TPH) -2lbs (0.91kg)
Bride Guga: 29.5lbs (13.38kg) | Reduction: (TPH) -17.5lbs (7.94kg)

- Racing Non-Reclinable -
Bride ZETA III: 26lbs (11.79kg) | Reduction -21lbs (9.53kg)

Miscellaneous:

- Batteries -
Braille Light Weight Battery B129 (Recommended Race only): 9lbs (4.1kg) | Reduction: 26lbs (11.79kg)
Braille Light Weight Battery B14115 (Recommended Race only): 11.5lbs (5kg) | Reduction: 23.5lbs (10.66kg)
Braille Light Weight Battery B14115: 15lbs (6.8kg) | Reduction: 20lbs (9.07kg)
Odyssey Light Weight Battery PC680: 14lbs (6.35kg) | Reduction: 21lbs (9.53kg)

Footnotes:

(TPH) = Touring Package Heated

Useful Links

WHEELWEIGHTS.NET
Braille Battery

Excellent thread. I will be watching and contributing....

Nice, this looks like a useful thread that will hopefully get stickied.
Maybe for those who have bought their 370Z already, we can get a weight on spare tire and jack/tools. Thats one of the easiest places to drop weight.
Also, some one should try to weigh the stock wheels and tires, as this is another good place to save weight. My estimates would be 24-25 lb front wheels and 27-28 lb rear wheel but I'm just guessing.

Wheel Weights
 

For anybody interested in what wheels to purchase: WHEELWEIGHTS.NET

I'm going to probably leave the stock 19in wheels, (the weight isn't that bad) but the tires weigh 30 Lbs each! Those have got to go!

Ninja edit

Any update on the weight of stock 18" and 19" wheels?

Oh hell yeah. I'm glad to see this thread here!

I will reserve my spot on this thread for when I get my 370Z. I have a set of scales and a box full of tools!

That's what I wanted to hear! :driving:

Here are the weights of the stock Sport package wheels/tires (19")
Fronts
http://www.go370z.com/images/20081125/rim1a.jpg
http://www.go370z.com/images/20081125/rim1b.jpg

Rears
http://www.go370z.com/images/20081125/rim2a.jpg
http://www.go370z.com/images/20081125/rim2b.jpg

Good stuff. Is the weight of one of the exhaust systems incorrect? The weight savings should be 19.8 lbs, right?

According to tirerack, for the Bridgestone RE050A, a 245/40/19 weighs 29lbs and the 275/35/19 weighs 30lbs.

So the front wheel weighs, 23.2lbs and the rears weighs 26.8lbs.

Perhaps the scales are off, but Nissan did advertise these wheels as 20% lighter. Not sure which wheels they were comparing to, but that doesn't look to hold true from this info.

On the bridgestone website, the 275/35/19s are listed at 33lbs.

Sizes and Specifications
Tire Specs for Bridgestone Potenza RE050A

^^^ Thanks for doing that sensi09, rep for you for being proactive. I was just about to post that info up as well.

What this means boys and girls is that a set of CE28's in the same sizes will probably save us around 20 lbs total. In 18's we'll probably see a 25 lbs saving. (Just a rough estimate, so plz correct me)

23.8 lbs for a 19x10 stock wheel isn't bad at all.

Compare to 350z Stock wheel weights
Wheel Version___Front Weight___Rear Weight
Standard 17"_________23.26 ___________24.14
Touring 18" v.1_______26.56___________26.56
Track 18" v.1_________18.19___________18.62
Touring 18" v.2_______24.8____________25.8
Track 18/19" v.2______21.25___________29.50


*sorry for the underscores, thread formatting ignores multiple spaces*

Will fix, I didn't do the math myself.

Will add this great info to the thread as soon as I am able to edit the first post.

And those are what I am getting!! I am just giddy about the upsprung weight being gone....

Wow, those wheels are really light considering they are stockers.

We are overlooking one area of weight saving for the 370Z: those Akebono brakes.

Since alot of G35 guys ended up upgrading their brakes to the Akebono brakes from the G37, which are exactly the same as the Z34 brakes, they all had a first hand experience at how heavy those rotors really are.

A 2-piece aftermarket rotor would definitely help. Especially since that's all unsprung weight, which has more of an impact on acceleration than other areas of weight.

My rotors are gonna go almost immediately and in their place will go a set of DBA 5000, I will get the weight of the DBA's in a min.

I compiled a list of some of the common Volk wheel weight options for the 350Z and G35. Most of these sizes will fit perfectly on the 370Z :) Feel free to add to the list to compare to the stock weights. Our weights are official per Rays Japan.

Wheel Weights for Common Aftermarket Volk Wheels (350Z/G35 Edition) : Injected Performance Blog

Volk CE28N 18×9.5: 16.76 lbs (7.60 kg)
Volk CE28N 18×10.5: 16.53 lbs (7.50 kg)
Volk CE28N 19×9.5: 20.61 lbs (9.35 kg)
Volk CE28N 19×10.5: 20.50 lbs (9.30 kg)

Volk RE30 18×9.5: 17.86 lbs (8.10 kg)
Volk RE30 18×10.5: 18.85 lbs (8.55 kg)
Volk RE30 19×9.0: 19.84 lbs (9.00 kg)
Volk RE30 19×10.0: 20.39 lbs (9.25 kg)
Volk RE30 19×11.0: 21.38 lbs (9.70 kg)

Volk TE37 18×9.5: 18.65 lbs (8.45 kg)
Volk TE37 18×10.5: 19.40 lbs (8.80 kg)
Volk TE37 19×9.5: 20.94 lbs (9.50 kg)
Volk TE37 19×10.5: 21.82 lbs (9.90 kg)

Volk SF Challenge 19×9.5: 26.79 lbs (12.15 kg)
Volk SF Challenge 19×10.5: 27.67 lbs (12.55 kg)

Volk GTS 19×9.5: 26.79 lbs (12.15 kg)
Volk GTS 19×10.5: 27.67 lbs (12.55 kg)

Volk GTV 19×9.5: 26.57 lbs (12.05 kg)
Volk GTV 19×10.5: 27.45 lbs (12.45 kg)

Nismo LM GT4 18×9.5: 18.51 lbs (8.40 kg)

370Z Stock weights:
Sport 19×9.0: 23.20 lbs (10.52 kg)
Sport 19×10.0: 23.80 lbs (10.80 kg)

There are just wayyy too many wheels to list them here, it will consume the thread. Thats the only reason I havent put them up.

Ok, took the spare, tools, and sub out of the back of the 370Z to weigh it last night. The pictures are terrible, sorry.

Bose Sub = 8 lbs.
Tools & Mats = 7 lbs.
Spare = 35 lbs.

Total = 50 lbs.

http://www.doubledownmotorsports.com...areweight1.jpg

http://www.doubledownmotorsports.com...areweight2.jpg

Also, side note. Probably one of the coolest looking spares I have seen, painted black and made by Enkei. :)

http://www.doubledownmotorsports.com...areweight3.jpg

50, that's pretty decent. Thanks for the effort.

That IS a pretty fancy looking spare. When I think of spares, I instantly imagine steel hubcaps haha. :tup:

That's a heavy spare, but a light sub woofer! I'll be leaving both in. I'm some-what surprised they didn't use the space-saver spare like they did in my 300zx.

Love how we can drop 50lbs in 1 minute.

Cool for the dragstrip, but it will mess with your handling balance on a road course. For anyone planning on setting their car up for the road course, just make sure you remember to take the spare and tools out of the back BEFORE you corner balance :).

I use to watch people with F-bods and other muscle cars drag with spares up front. You already have one, and could pick the other up cheap. You werent allowed to do it, so they must not have put them on till after the inspections.

Thats probably the dumbest thing I have ever heard. Those spare tires are not made to go anywhere near speeds you would see at a drag strip. Hense the reason it wasn't allowed.

I didn't talk to any of them about it, but I saw they they changed the tires, which were obviously the weak point. I wouldn't have trusted the rims for the minimal gain, but more power to anyone who doesnt mind risking their own car.

Ok well at least they changed the tires.

I think they were motorcycle tires, lol.

Surprised no one listed the Battery. So many super lightweight choices out there. Voltphreaks 5 lb batteries to Braille 9-11 lb batteries if memory serves. Thats a good bit of weight to lose epecially for track rats. You take out the stuff DD listed at 50lbs[mats, tools spare etc] and replace the battery with a lightweight one that almost 100lbs less before you even replace the seats, rotors, suspension etc. Just my laymans 2c..Love road racing more that 1/4 mile but have yet to cut my teeth at it at any real track. :ughdance:

http://voltphreaks.com/

http://braillebattery.com/

A list of the Voltphreaks vs other batteries
https://p10.secure.hostingprod.com/@...ison_chart.htm

great thread...ive done alot of weight reduction for road course soecific applications

wish i could get my hand on one of these cars

I was thinking on my way to work this morning. What if we pulled the spare and moved the battery back there? Wouldn't that alieviate the affor mentioned weight distribution problem?

BTW Cown...lovin the avatar.

Yes, it would definately help.

Side Note: I will try and find a few minutes to weigh the stock battery today.

Please do man, that would be greatly appreciated.


Very good point about the battery change. A braille is definitely the way to go. I will put that up on the thread. Good call Snakebitten. Voltphreaks batteries are outside of our scope. They are $2,000 for 5lbs less weight. At least out of my scope hehe. Rep .

Also Cowned, great name and avatar.

So I'm assuming the stock battery is going to come in at around 45-55lbs. That should offset the weight reduction of the spare, mats and tools. Also Considering Im going to get the 15lbs battery...comes out to over a 100lbs loss between that, the exhaust and the battery. ( Sweet )

haha thanks, and Braille batteries are awesome