BRZ Feather weight, What mods are you planning on doing to lighten up your BRZ? - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ForReal-Someday · 04-03-2012, 11:25 AM

Quote:

Originally Posted by AVOturboworld

We did corner weighting on our base BRZ, from the factory it was 1170kg. Right after that, we did the corner weighting on our 2005(ish) STI widebody race car, which has been lightened and stripped and lightened and stripped some more. After a massive effort, we got that down to... 1220kg. So a factory BRZ is 50kg lighter than a race car with one seat, a lot of bare metal, and every lightweight replacement we could put in.

I'd say the BRZ/FRS is a pretty good job right off the showroom floor. Especially given todays safety needs and mandates.

Regards,

Paul Hansen
www.avoturboworld.com
www.facebook.com/BRZSportsCarClub

Thank you for the comparison. This speaks volumes to me.

Grimlock · 04-03-2012, 11:27 AM

Quote:

Originally Posted by AVOturboworld

We did corner weighting on our base BRZ, from the factory it was 1170kg. Right after that, we did the corner weighting on our 2005(ish) STI widebody race car, which has been lightened and stripped and lightened and stripped some more. After a massive effort, we got that down to... 1220kg. So a factory BRZ is 50kg lighter than a race car with one seat, a lot of bare metal, and every lightweight replacement we could put in.

I'd say the BRZ/FRS is a pretty good job right off the showroom floor. Especially given todays safety needs and mandates.

Regards,

Paul Hansen
www.avoturboworld.com
www.facebook.com/BRZSportsCarClub

Were the fuel volumes equal with both cars?

OrbitalEllipses · 04-03-2012, 11:44 AM

A premium trim car, fully fueled without trunk junk should tip in on the low side of 2700, 2750ish on a full tank with junk. RCE weighed-in what I assume to be a pre-prod BRZ at 2714lbs without trunk junk. AVO's car (lowest JDM trim?) doesn't have a LSD, fogs, HIDs (?), A/C, radio, speakers (?), alloy wheels, and IIRC sound-deadening for it to weigh in at ~2580lbs.

xrs · 04-03-2012, 12:06 PM

Best bet on a lighter weight BRZ? Start out with an FRS.

On a serious note, airbag deletion...wonder how many pounds that could total? I'm talking sides, seats for starters.

toxicdrift · 04-03-2012, 01:10 PM

wont that leave some sort of dashboard warning sign on? i wouldnt want to remove airbags ..do they really weight alot?? the stuff thats easily removed is the way for me, battery, exhaust , lighter wheels + lighter rotors etc ..maybe lighter seats (if budget supports spending 500$+ on one) ill keep my a/c and radio aswell, its a daily driver, i intend to keep it as one

dsgerbc · 04-03-2012, 01:16 PM

Quote:

Originally Posted by toxicdrift

i wouldnt want to remove airbags ..do they really weight alot??

But one can also remove their brain along with that, also saves a few pounds.

Dark · 04-03-2012, 01:21 PM

Quote:

Originally Posted by Grimlock

Were the fuel volumes equal with both cars?

Even it's not equal on both cars, there is no way the difference of fuel volume can be equivalent of 50kg.

tranzformer · 04-03-2012, 01:24 PM

Quote:

Originally Posted by Dark

Even it's not equal on both cars, there is no way the difference of fuel volume can be equivalent of 50kg.

Right. Gasoline is about 6lbs per gallon. Mutiple that by the suspected difference in fuel and at most that accounts for 1/2 the weight difference.

MRZ415 · 04-03-2012, 01:27 PM

Enkei RPF-01 all around will shave 20lb off overall weight due to being
5lb lighter per rim... and exhaust maybe ...

Grimlock · 04-03-2012, 01:56 PM

Quote:

Originally Posted by MRZ415

Enkei RPF-01 all around will shave 20lb off overall weight due to being
5lb lighter per rim... and exhaust maybe ...

If you're going for sheer performance numbers, wider wheels (and thus heavier) usually* result in faster times (take 9 and 10 inch wide Miata wheels, for instance). If there's one place to spend weight, it's on wider wheels and tires.

* but not always.

Grimlock · 04-03-2012, 01:57 PM

Quote:

Originally Posted by Dark

Even it's not equal on both cars, there is no way the difference of fuel volume can be equivalent of 50kg.

True, but it's always nice to compare apples to apples.

Lighting Red · 04-03-2012, 02:01 PM

Quote:

Originally Posted by dsgerbc

But one can also remove their brain along with that, also saves a few pounds.

I'm just going to go ahead and +1 this post.

86'd · 04-03-2012, 02:06 PM

Well like its been said if you want the lightest platform, start with the frs first.

Then, I think with I/h/e, lighter wheels and removal of spare/tools, you'll be very close to 2600lbs. And that's with just a bit added noise and not that much compromise.

Then if you wanted to go crazy, you'd remove the seats, put in one racing seat, put in a lightweight battery, remove the stereo and all the speakers and that might get you down to around mid to low 2500lbs.

Then a full gut of all sound deadening, a/c delete, hvac piping, bumpers and I can see it being mid to high 2400lbs.

And after all that factoring gains from the I/h/e and a tune and you might be as fast as an STI. LOL.

S2kphile · 04-03-2012, 04:04 PM

Quote:

Originally Posted by dori.

not let fat chicks ride shotgun

or backseats either. Hitting the gym to lose the excess extra weight I carry & wear lightweight clothes & not leaving shit inside my car.

04-03-2012, 01:27 PM	#37
MRZ415 Senior Member Join Date: Dec 2011 Drives: 2015 Subaru WRX Location: San Francisco Posts: 339 Thanks: 41 Thanked 14 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Enkei RPF-01 all around will shave 20lb off overall weight due to being 5lb lighter per rim... and exhaust maybe ... __________________

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04-03-2012, 11:44 AM	#31
OrbitalEllipses Banned Join Date: Jan 2012 Drives: Attitude Location: MD Posts: 10,046 Thanks: 884 Thanked 4,889 Times in 2,902 Posts Mentioned: 123 Post(s) Tagged: 4 Thread(s)	A premium trim car, fully fueled without trunk junk should tip in on the low side of 2700, 2750ish on a full tank with junk. RCE weighed-in what I assume to be a pre-prod BRZ at 2714lbs without trunk junk. AVO's car (lowest JDM trim?) doesn't have a LSD, fogs, HIDs (?), A/C, radio, speakers (?), alloy wheels, and IIRC sound-deadening for it to weigh in at ~2580lbs.

04-03-2012, 12:06 PM	#32
xrs Senior Member Join Date: Jan 2011 Drives: 02 Mitsubishi Mirage Location: Minnesota Posts: 236 Thanks: 5 Thanked 54 Times in 31 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Best bet on a lighter weight BRZ? Start out with an FRS. On a serious note, airbag deletion...wonder how many pounds that could total? I'm talking sides, seats for starters.

04-03-2012, 01:10 PM	#33
toxicdrift Member Join Date: Jan 2012 Drives: Suzuki Carry Location: India Posts: 33 Thanks: 1 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	wont that leave some sort of dashboard warning sign on? i wouldnt want to remove airbags ..do they really weight alot?? the stuff thats easily removed is the way for me, battery, exhaust , lighter wheels + lighter rotors etc ..maybe lighter seats (if budget supports spending 500$+ on one) ill keep my a/c and radio aswell, its a daily driver, i intend to keep it as one

04-03-2012, 02:06 PM	#41
86'd Senior Member Join Date: Dec 2011 Drives: 2012 WRX Sedan Location: Los Angeles Posts: 511 Thanks: 25 Thanked 97 Times in 55 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Well like its been said if you want the lightest platform, start with the frs first. Then, I think with I/h/e, lighter wheels and removal of spare/tools, you'll be very close to 2600lbs. And that's with just a bit added noise and not that much compromise. Then if you wanted to go crazy, you'd remove the seats, put in one racing seat, put in a lightweight battery, remove the stereo and all the speakers and that might get you down to around mid to low 2500lbs. Then a full gut of all sound deadening, a/c delete, hvac piping, bumpers and I can see it being mid to high 2400lbs. And after all that factoring gains from the I/h/e and a tune and you might be as fast as an STI. LOL.

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