Rear Diffuser with No Exhaust Holes - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

spitfire481 · 09-01-2014, 01:15 PM

I use one of these. The fitment is great. I like it better then the metal options

http://www.innovateddynamics.com/pro...e-frs-brz-gt86

Anthony · 09-01-2014, 01:41 PM

Quote:

Originally Posted by Wonderbar

Cut it out entirely

Quote:

Originally Posted by ZionsWrath

@Anthony

Indeed.

http://www.ft86club.com/forums/showthread.php?t=59200

mike the snake · 09-01-2014, 02:58 PM

Does the exhaust make it's way into the cabin when running with open windows?

Kiske · 09-01-2014, 03:41 PM

Diffillow diffuser for a lotus and a bit of triming will do wonders.

PrimeMotoring · 09-01-2014, 05:02 PM

Quote:

Originally Posted by Anthony

Indeed.

http://www.ft86club.com/forums/showthread.php?t=59200

Thats awesome. ...looks like that will be the route. Thanks guys! Ill update with pics

Yamajee · 09-01-2014, 05:14 PM

Quote:

Originally Posted by PrimeMotoring

Yes, its loud at startup and under wot but cruising and putting around is surprisingly docile. Just a very loud whistle lol

yeah, the turbo spooling.... ok im cutting my hood soon then haha!

good luck with covering the holes!

Anthony · 09-01-2014, 05:52 PM

Very good.

gramicci101 · 09-01-2014, 05:57 PM

Quote:

Originally Posted by Wonderbar

I'd still add a diffuser, but I'm not trying to thread jack.

So, question. Assuming you completely remove the black plastic thing so you have more space to play with, and there you've got no exhaust to account for, could you make a more effective diffuser?

Gunman · 09-01-2014, 06:11 PM

Quote:

Originally Posted by gramicci101

So, question. Assuming you completely remove the black plastic thing so you have more space to play with, and there you've got no exhaust to account for, could you make a more effective diffuser?

Probably. Nice curved surface (higher order conic) starting where the RARB mounts, ie look at an Elise/Exige, or Ferrari diffuser.

Wonderbar · 09-01-2014, 06:16 PM

Quote:

Originally Posted by gramicci101

So, question. Assuming you completely remove the black plastic thing so you have more space to play with, and there you've got no exhaust to account for, could you make a more effective diffuser?

You could in theory if you had the cfd or wind tunnel time and a big budget. You still have to account for the proper angle to keep the wind happy on our car, so going bigger diffuser angle doesn't = more downforce.

Wonderbar · 09-01-2014, 06:17 PM

Quote:

Originally Posted by Gunman

Probably. Nice curved surface (higher order conic) starting where the RARB mounts, ie look at an Elise/Exige, or Ferrari diffuser.

^ this. Finding the proper curve to make her happy.

Heh.

Jive Turkey · 09-02-2014, 11:14 AM

since you don't have to worry about an exhaust maybe it would be worth while to fit the Lotus rear diffuser on there. saw one person do it here.

PrimeMotoring · 09-02-2014, 12:47 PM

Quote:

Originally Posted by Jive Turkey

since you don't have to worry about an exhaust maybe it would be worth while to fit the Lotus rear diffuser on there. saw one person do it here.

pics?

Wonderbar · 09-02-2014, 01:01 PM

Quote:

Originally Posted by Jive Turkey

since you don't have to worry about an exhaust maybe it would be worth while to fit the Lotus rear diffuser on there. saw one person do it here.

The style of diffuser would matter on what style of racing. If it's primarily for drag, you'll want as low of an angle as possible to give max drag reduction and low downforce.

I wish the time/money was available to actually test the lotus diffuser on our cars. It does look damn sexy, it has to work to an extent, just an unmeasured one.

09-01-2014, 03:41 PM	#18
Kiske Senior Member Join Date: Jun 2013 Drives: RX-7 / BRZ Location: USA Posts: 2,349 Thanks: 1,031 Thanked 2,501 Times in 1,081 Posts Mentioned: 27 Post(s) Tagged: 0 Thread(s)	Diffillow diffuser for a lotus and a bit of triming will do wonders. __________________ //2013 World Rally Blue BRZ Limited FBM Turbo--gone //2018 Crystal White Pearl BRZ Ts 2.2l Harrop Supercharged

09-01-2014, 05:52 PM	#21
Anthony Weight Nazi Join Date: Aug 2012 Drives: 13 FRS -399lb, 11 335is, 05 Tiburon Location: Biloxi, MS / Gulf Coast 86 Posts: 3,702 Thanks: 5,009 Thanked 3,714 Times in 1,765 Posts Mentioned: 150 Post(s) Tagged: 4 Thread(s)	Very good. __________________ Build Thread \| The Venus Project \| Any car which holds together for a whole race is too heavy.

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09-01-2014, 01:15 PM	#15
spitfire481 Senior Member Join Date: Mar 2013 Drives: 2JZ FRS Location: Pure Automotive Performance Posts: 1,378 Thanks: 97 Thanked 1,354 Times in 621 Posts Mentioned: 27 Post(s) Tagged: 2 Thread(s)	I use one of these. The fitment is great. I like it better then the metal options http://www.innovateddynamics.com/pro...e-frs-brz-gt86

09-01-2014, 02:58 PM	#17
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Does the exhaust make it's way into the cabin when running with open windows?

09-02-2014, 11:14 AM	#26
Jive Turkey the tuna, no crust. Join Date: Oct 2012 Drives: 2014 Hachiroku of the year Location: jersey Posts: 2,299 Thanks: 874 Thanked 1,770 Times in 761 Posts Mentioned: 78 Post(s) Tagged: 0 Thread(s)	since you don't have to worry about an exhaust maybe it would be worth while to fit the Lotus rear diffuser on there. saw one person do it here.

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