|
BRZ First-Gen (2012+) -- General Topics All discussions about the first-gen Subaru BRZ coupe |
|
Thread Tools | Search this Thread |
02-06-2012, 12:37 AM | #1 |
Senior Member
Join Date: Nov 2011
Drives: Some rust bucket
Location: Polar ice cap
Posts: 3,058
Thanks: 312
Thanked 1,045 Times in 556 Posts
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
|
Official JDM BRZ weight and MPG
|
02-06-2012, 12:43 AM | #2 |
Senior Member
Join Date: Nov 2011
Drives: ex500r
Location: AR
Posts: 859
Thanks: 13
Thanked 105 Times in 77 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
pretty good, but i was expecting at least 35. i mean that what DI was suppose to be for.
i wonder if its an average of city/hwy. Why do the different specs get different MPG rating. 13.4 for RA. and 12.4 for the S |
02-06-2012, 12:45 AM | #3 |
Senior Member
Join Date: Nov 2011
Drives: Some rust bucket
Location: Polar ice cap
Posts: 3,058
Thanks: 312
Thanked 1,045 Times in 556 Posts
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
|
|
02-06-2012, 12:45 AM | #4 |
Senior Member
Join Date: Jan 2012
Drives: BRZ(sold), STI
Location: A2, MI
Posts: 1,915
Thanks: 176
Thanked 419 Times in 241 Posts
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
|
40 kilos lower mpg by 2.5? Hm.
|
02-06-2012, 12:50 AM | #5 | ||
Senior Member
Join Date: Jan 2012
Drives: BRZ(sold), STI
Location: A2, MI
Posts: 1,915
Thanks: 176
Thanked 419 Times in 241 Posts
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Quote:
|
||
02-06-2012, 01:44 AM | #6 |
ZC6A2B82KC7J
Join Date: May 2011
Drives: 2002 WRX
Location: Providence, RI
Posts: 1,632
Thanks: 361
Thanked 727 Times in 236 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
Its also a different final drive ratio for the open diff vs LSD
|
02-06-2012, 03:31 AM | #7 |
Senior Member
Join Date: Mar 2011
Drives: '06 AM V8V Coupe
Location: United States of America
Posts: 5,279
Thanks: 285
Thanked 1,074 Times in 759 Posts
Mentioned: 13 Post(s)
Tagged: 1 Thread(s)
|
Notice the test doesn't spend much time holding speed, so the higher diff ratio isn't making much of a difference. The frequent stopping/starting means the weight will matter much more as you can see. On the highway, the diff ratio will determine the cruising efficiency, which I predict to be pretty low. Hoping Toyota changes the 6th gear to 0.62 ish for a 2200 rpm cruise on the 4.100, 2000 on the 3.727, or even lower.
Oh and another thing to note is that the faster the car, the more it is hurt on a test like this because the acceleration is pretty leisurely (to accomodate the slow cars). For more extreme gas savers, the good thing about a 2.0L engine is the idle consumption is low so you can pulse and glide with the engine on and get a very high mpg number. |
02-06-2012, 03:52 AM | #8 |
Senior Member
Join Date: Dec 2011
Drives: 1986 AE86 GT-S, 2011 Lexus IS250 6M
Location: Calgary, Canada
Posts: 661
Thanks: 136
Thanked 361 Times in 161 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
|
If you read the notes on Subaru's website, the fuel mileage information becomes a tiny bit more clear.
RA 6MT = 13.4 km/L without A/C, 13.0 km/L with A/C (16" Wheels, 3.73:1 Final Drive) R 6MT = 13.0 km/L (16" Wheels, 3.73:1 Final Drive), 12.4km/L (17" Wheels, 4.10:1 Final Drive) S 6MT = 12.4 km/L (17" Wheels, 4.10:1 Final Drive) Jeff
__________________
2011 Lexus IS350 F-Sport 6MT with LSD 1986 Toyota Corolla GT-S Supercharged |
02-06-2012, 10:35 AM | #9 |
Senior Member
Join Date: Oct 2009
Drives: 2005 Hyundai Accent
Location: Ottawa Ontario
Posts: 306
Thanks: 27
Thanked 15 Times in 7 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Well it looks like these figures are for city driving, not highway like we were assuming, based on the JC08 spec. So in a 20 min session with 10 stops and starts, less than a minute of sustained highway(ish) speed and plenty of acceleration (albeit slow acceleration) 29.2 mpg is quite impressive. I'm trying to find two equivalent cars to compare JC08 vs EPA ratings, which is hard when you can't read Japanese.
Edit: I guess I was wrong. The 2.0L SKYACTIV Mazda 3 gets 38mpg from the JC08, which is almost exactly it's EPA highway rating (39), so now I'm just confused. I need to stop speculating. It's way too frustrating.
__________________
GT86: "This car has two steering wheels: one is circular, the other is operated with the right foot." |
02-06-2012, 12:46 PM | #10 | |
Site Moderator
Join Date: Dec 2010
Drives: Stuff
Location: Florida
Posts: 10,317
Thanks: 955
Thanked 5,965 Times in 2,689 Posts
Mentioned: 262 Post(s)
Tagged: 8 Thread(s)
|
Quote:
I have no idea how JC08 compares to the EPA testing, but that may be a bad example. I recall the compression ratio at least being significantly different but I may be wrong (on the US vs JDM Mazda 3 SkyActiv).
__________________
-Dave
Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles |
|
02-06-2012, 08:18 PM | #11 |
Senior Member
Join Date: Mar 2011
Drives: '06 AM V8V Coupe
Location: United States of America
Posts: 5,279
Thanks: 285
Thanked 1,074 Times in 759 Posts
Mentioned: 13 Post(s)
Tagged: 1 Thread(s)
|
The US one has lower CR because US fuel quality has some issues or something.
It's hard to compare these tests but yea the 86 isn't doing as well in economy as it could be. Hard to say why. I'm curious what this scores on the EPA test because you'd think CAFE standards would prompt them to try to do better, if this only get say 31mpg (for CAFE calculation, I don't remember what that is exactly), then even with its small volume it poses a pretty big threat to the 39mpg small car requirement. |
02-06-2012, 08:43 PM | #12 | |
Banned
Join Date: Feb 2010
Drives: Toyota Aristo
Location: Brisbane,Aust
Posts: 796
Thanks: 0
Thanked 6 Times in 6 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
and 12.4km/l = 8.1l/km pretty decent. |
|
02-06-2012, 08:56 PM | #13 |
Pavement Grey
Join Date: Dec 2011
Drives: 2020 Toyota 86 GT, 2017 BMW X1
Location: Calgary
Posts: 3,084
Thanks: 109
Thanked 2,223 Times in 1,205 Posts
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
|
Also note that the boxer configuration is inherently less fuel efficient than an inline configuration for some reason.
|
02-06-2012, 08:57 PM | #14 |
Senior Member
Join Date: Mar 2011
Drives: '06 AM V8V Coupe
Location: United States of America
Posts: 5,279
Thanks: 285
Thanked 1,074 Times in 759 Posts
Mentioned: 13 Post(s)
Tagged: 1 Thread(s)
|
I forgot about the lack of underbody panels on the RA. But all you really have to do is buy some corrugated foam board and tape it to the bottom...
No, boxer is not inherently less efficient. Subaru's EJ engines were just really old and inefficient by design. If anything, the better balance would make it more efficient due to slightly lower friction. |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
So what is the official weight? | brillo | Scion FR-S / Toyota 86 GT86 General Forum | 76 | 05-03-2020 05:11 PM |
Official Weight Reduction Thread - Sort of... | merlin2111 | Off-Topic Lounge [WARNING: NO POLITICS] | 77 | 10-07-2012 05:09 PM |
How can i shave weight? | fernan2 | BRZ First-Gen (2012+) -- General Topics | 15 | 11-01-2011 10:31 AM |
Another Rumor About Weight | Enzie | Scion FR-S / Toyota 86 GT86 General Forum | 1 | 10-23-2011 02:00 AM |
Weight of FT-86? | Levi | Engine, Exhaust, Transmission | 38 | 06-14-2011 10:43 PM |