The Gurney Flap Thread - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

BR-ZED · 04-21-2018, 09:39 AM

Please post pics of your gurney flaps!

I'm trying to decide on which one I like the most and am having a hard time finding actual pictures, especially of the Perrin and Maxton Designs one. Those in my opinion look the best.

Here's the ones I know about:
1. STI

2. Perrin

3. Maxton Design

4. password JDM

5. Skuad Mfg Co
another view

Summerwolf · 04-21-2018, 10:08 AM

The perrin one requires drilling a bunch of holes and having some huge hardware, which was a no for me. It looks decent, except from behind.

Pat · 04-21-2018, 10:43 AM

I think all of them are pretty good, just in different ways. I'd probably go for the PJDM one, personally. It looks to be the highest quality with the simplest design.

norcalpb · 04-21-2018, 03:02 PM

I have the STi one and it’s literally just a strip of rubber that gets soft in the heat. Although Subaru advertises “added stability without a drag penalty”.

I’d also to like to see Maxton pictures.

JoeS · 04-21-2018, 03:10 PM

I have the Perrin Gurney Flap and like it.

guybo · 04-21-2018, 04:08 PM

Perrin. I wasn't worried about drilling holes, I don't want my aero devices glued or taped on.

norcalpb · 04-21-2018, 04:23 PM

Has anyone ever paint matched their Perrin flap?

KMA KiCKz · 04-21-2018, 04:38 PM

+1 on Maxton pics please!

n0thing · 04-21-2018, 04:41 PM

Those with the Perrin flap, does it actually make a difference? There was an analysis done by Velox/Verus, but I'm inquiring about real life experience.

https://www.verus-engineering.com/si...-Flap-Analysis

guybo · 04-23-2018, 11:08 AM

take this FWIW, but when I first got my FRS, I had problems with hydroplaning on the highway during heavy downpours- which in Tampa is every day during the summer. I had a few oh shit moments in this car, I never had in my GenPoop. Just eyeballing the FRS, I noticed that it is built for being streamlined on the highway and lacks any sort of aero devices to reduce aero lift. The Gen has a small lip, small canards and is a lot wider than the FRS. It also was a lot more stable at speed.

So I added a front lip, side skirts and rear spats and BRZ spoiler. Soon after I added the gurney flap. Since then (even on the OEM tires) I have never hydroplaned. I even tried to once at a spot on the highway I knew where it happened every time it rained. Nope, I just plowed through the rivulet.

So does it make a difference? My whole aero package has made a big difference- no hydroplaning, very solid and planted at very high speeds and also, my MPG has suffered too.

Will someone soon post and say that it's all in my head, akin to a butt dyno, no way proven aero technologies can work on a road car? ... yup. Do I know my car and can I tell the difference at 70 MPH? ...yup

norcalpb · 04-23-2018, 02:12 PM

Quote:

Originally Posted by guybo

take this FWIW, but when I first got my FRS, I had problems with hydroplaning on the highway during heavy downpours- which in Tampa is every day during the summer. I had a few oh shit moments in this car, I never had in my GenPoop. Just eyeballing the FRS, I noticed that it is built for being streamlined on the highway and lacks any sort of aero devices to reduce aero lift. The Gen has a small lip, small canards and is a lot wider than the FRS. It also was a lot more stable at speed.

So I added a front lip, side skirts and rear spats and BRZ spoiler. Soon after I added the gurney flap. Since then (even on the OEM tires) I have never hydroplaned. I even tried to once at a spot on the highway I knew where it happened every time it rained. Nope, I just plowed through the rivulet.

So does it make a difference? My whole aero package has made a big difference- no hydroplaning, very solid and planted at very high speeds and also, my MPG has suffered too.

Will someone soon post and say that it's all in my head, akin to a butt dyno, no way proven aero technologies can work on a road car? ... yup. Do I know my car and can I tell the difference at 70 MPH? ...yup

Which gurney flap do you have? Based on your setup, the BRZ spoiler is the only functional piece you have. The spoiler combined with underpanels is .02 reductio. In CD according to Subaru.

guybo · 04-23-2018, 03:02 PM

And there it is. Reading skills FTW +1

LOLS2K · 04-23-2018, 03:09 PM

Is this real life?

8RZ · 04-23-2018, 03:21 PM

In F1, some teams will raise the ride height in order to prevent hydroplaning; less ground clearance will increase the risk of hydroplaning (hence, wet setup).

So having "aero" that is closer to the ground can actually hurt traction, not help it.

04-21-2018, 09:39 AM	#1
BR-ZED Senior Member Join Date: Aug 2015 Drives: 2014 WRB BRZ Limited Location: MD Posts: 200 Thanks: 156 Thanked 61 Times in 37 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	The Gurney Flap Thread Please post pics of your gurney flaps! I'm trying to decide on which one I like the most and am having a hard time finding actual pictures, especially of the Perrin and Maxton Designs one. Those in my opinion look the best. Here's the ones I know about: 1. STI 2. Perrin 3. Maxton Design 4. password JDM 5. Skuad Mfg Co another view Last edited by BR-ZED; 09-07-2018 at 10:51 PM.

04-21-2018, 03:10 PM	#5
JoeS Member Join Date: Jan 2016 Drives: 2016 BRZ Hyper.Blue Location: Oak Harbor, WA Posts: 36 Thanks: 12 Thanked 18 Times in 10 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I have the Perrin Gurney Flap and like it. Attached Images

04-23-2018, 11:08 AM	#10
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	take this FWIW, but when I first got my FRS, I had problems with hydroplaning on the highway during heavy downpours- which in Tampa is every day during the summer. I had a few oh shit moments in this car, I never had in my GenPoop. Just eyeballing the FRS, I noticed that it is built for being streamlined on the highway and lacks any sort of aero devices to reduce aero lift. The Gen has a small lip, small canards and is a lot wider than the FRS. It also was a lot more stable at speed. So I added a front lip, side skirts and rear spats and BRZ spoiler. Soon after I added the gurney flap. Since then (even on the OEM tires) I have never hydroplaned. I even tried to once at a spot on the highway I knew where it happened every time it rained. Nope, I just plowed through the rivulet. So does it make a difference? My whole aero package has made a big difference- no hydroplaning, very solid and planted at very high speeds and also, my MPG has suffered too. Will someone soon post and say that it's all in my head, akin to a butt dyno, no way proven aero technologies can work on a road car? ... yup. Do I know my car and can I tell the difference at 70 MPH? ...yup Attached Images

04-23-2018, 03:09 PM	#13
LOLS2K /scion Join Date: Sep 2015 Drives: '13 86 M/T Location: PHX-LAX Posts: 1,490 Thanks: 1,031 Thanked 1,402 Times in 786 Posts Mentioned: 26 Post(s) Tagged: 4 Thread(s)	Is this real life? __________________ "Practice makes better. Only Senna is perfect." - CSG Mike

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04-21-2018, 10:08 AM	#2
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,347 Thanks: 2,113 Thanked 2,407 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	The perrin one requires drilling a bunch of holes and having some huge hardware, which was a no for me. It looks decent, except from behind.

04-21-2018, 03:02 PM	#4
norcalpb Senior Member Join Date: Oct 2013 Drives: 2013 BRZ, 2023 Model 3 Location: SF Bay Area Posts: 2,296 Thanks: 1,212 Thanked 863 Times in 570 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I have the STi one and it’s literally just a strip of rubber that gets soft in the heat. Although Subaru advertises “added stability without a drag penalty”. I’d also to like to see Maxton pictures.

04-21-2018, 04:08 PM	#6
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Perrin. I wasn't worried about drilling holes, I don't want my aero devices glued or taped on.

04-21-2018, 04:23 PM	#7
norcalpb Senior Member Join Date: Oct 2013 Drives: 2013 BRZ, 2023 Model 3 Location: SF Bay Area Posts: 2,296 Thanks: 1,212 Thanked 863 Times in 570 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Has anyone ever paint matched their Perrin flap?

04-21-2018, 04:38 PM	#8
KMA KiCKz Certified Wumbologist Join Date: Dec 2017 Drives: 2015 Scion FR-S Location: San Jose, California Posts: 255 Thanks: 421 Thanked 336 Times in 143 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	+1 on Maxton pics please!

04-21-2018, 04:41 PM	#9
n0thing Senior Member Join Date: Jan 2014 Drives: Subaru BRZ Location: Markham Posts: 394 Thanks: 48 Thanked 90 Times in 53 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Those with the Perrin flap, does it actually make a difference? There was an analysis done by Velox/Verus, but I'm inquiring about real life experience. https://www.verus-engineering.com/si...-Flap-Analysis

04-23-2018, 03:02 PM	#12
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	And there it is. Reading skills FTW +1

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