The 86's Frontal Area - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

sw20kosh · 12-09-2013, 03:28 PM

Does anyone know the frontal area of the twins? An estimate even?

garfull · 12-09-2013, 04:08 PM

One method, but not sure if this is what you're asking.

FRS Cd is .27 and BRZ is .29 both without spoilers. Use formula from here to back calculate the area A

[ame="http://en.wikipedia.org/wiki/Drag_coefficient"]Drag coefficient - Wikipedia, the free encyclopedia[/ame]

fatoni · 12-09-2013, 04:10 PM

Quote:

Originally Posted by garfull

One method, but not sure if this is what you're asking.

FRS Cd is .27 and BRZ is .29 both without spoilers. Use formula from here to back calculate the area A

Drag coefficient - Wikipedia, the free encyclopedia

without looking into it, its looking like we still dont have all the values to do that.

u/Josh · 12-09-2013, 09:17 PM

Just estimate the frontal area as a rectangle and eyeball it with a tape measure. I guess you are trying to setup some kind of virtual dyno?

sw20kosh · 12-10-2013, 01:48 PM

Thanks for all the suggestions. Yes this is for Virtual Dyno.

I just basically used the frontal area of an integra. Should be about the same no?

ZDan · 12-10-2013, 01:51 PM

Should be about 20 ft^2

d1ck · 12-10-2013, 08:46 PM

I've done this on another car by getting a straight on front picture and scaling it in autocad using known dimensions.

chrisl · 12-10-2013, 08:52 PM

Quote:

Originally Posted by garfull

One method, but not sure if this is what you're asking.

FRS Cd is .27 and BRZ is .29 both without spoilers. Use formula from here to back calculate the area A

Drag coefficient - Wikipedia, the free encyclopedia

You can't back calculate it from that knowledge alone - you would also have to know the drag force at some speed, or the drag area. The whole point of the Cd is that it's independent of the frontal area.

Captain Snooze · 12-10-2013, 10:43 PM

Quote:

Originally Posted by d1ck

I've done this on another car by getting a straight on front picture and scaling it in autocad using known dimensions.

Use the longest focal length lens you can find.

Rampage · 12-10-2013, 11:54 PM

Quote:

Originally Posted by sw20kosh

Thanks for all the suggestions. Yes this is for Virtual Dyno.

I just basically used the frontal area of an integra. Should be about the same no?

I remember someone said they did it using the frontal area of a 370Z a while back.

icemang17 · 12-15-2013, 05:35 PM

I doubt the FRS is 20ft.....my 928 is 21.28ft and its a MUCH larger-wider car....

12-09-2013, 03:28 PM	#1
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	The 86's Frontal Area Does anyone know the frontal area of the twins? An estimate even?

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12-09-2013, 04:08 PM	#2
garfull Senior Member Join Date: Apr 2013 Drives: FRS(sold), AP2, R35, FJC, ED9 Location: 510 Posts: 527 Thanks: 370 Thanked 192 Times in 128 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	One method, but not sure if this is what you're asking. FRS Cd is .27 and BRZ is .29 both without spoilers. Use formula from here to back calculate the area A [ame="http://en.wikipedia.org/wiki/Drag_coefficient"]Drag coefficient - Wikipedia, the free encyclopedia[/ame]

12-09-2013, 09:17 PM	#4
u/Josh Senior Member Join Date: Jan 2013 Drives: GBS Limited 6MT Location: Phoenix Posts: 200 Thanks: 186 Thanked 69 Times in 42 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just estimate the frontal area as a rectangle and eyeball it with a tape measure. I guess you are trying to setup some kind of virtual dyno?

12-10-2013, 01:48 PM	#5
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	Thanks for all the suggestions. Yes this is for Virtual Dyno. I just basically used the frontal area of an integra. Should be about the same no?

12-10-2013, 01:51 PM	#6
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,671 Thanks: 1,437 Thanked 4,011 Times in 2,097 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	Should be about 20 ft^2

12-10-2013, 08:46 PM	#7
d1ck Senior Member Join Date: Jul 2012 Drives: Black 2013 FRS Location: Newfoundland Posts: 249 Thanks: 31 Thanked 83 Times in 54 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I've done this on another car by getting a straight on front picture and scaling it in autocad using known dimensions.

12-15-2013, 05:35 PM	#11
icemang17 Senior Member Join Date: Jun 2012 Drives: Scion FR-S/ Subaru BRZ Location: Stockton CA Posts: 181 Thanks: 2 Thanked 105 Times in 54 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	I doubt the FRS is 20ft.....my 928 is 21.28ft and its a MUCH larger-wider car....

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