Question about the Borla Diffuser - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

EarlQHan · 02-20-2013, 01:21 PM

Quote:

Originally Posted by Freeman

on a DD car i dont see the point of having a diffuser on the car. here's some links explaining diffusers

https://www.google.com/#hl=en&safe=o...w=1536&bih=669

http://en.wikipedia.org/wiki/Diffuser_(automotive)

http://www.racecar-engineering.com/t...-aerodynamics/

the point is to increase rear traction and stability.

Freeman · 02-20-2013, 01:32 PM

Quote:

Originally Posted by EarlQHan

the point is to increase rear traction and stability.

correct....but my point (many moons ago) was on a DD (daily driver) car i didn't see the point. seeing as how most of my experience with a daily drive was stop and go traffic.

plucas · 02-20-2013, 02:39 PM

Quote:

Originally Posted by Freeman

correct....but my point (many moons ago) was on a DD (daily driver) car i didn't see the point. seeing as how most of my experience with a daily drive was stop and go traffic.

They also usually decrease drag (aka better fuel mileage for a dd

) if designed properly. Not saying this one does decrease drag or not because I do not know.

chenshuo · 02-20-2013, 02:49 PM

Quote:

Originally Posted by Freeman

correct....but my point (many moons ago) was on a DD (daily driver) car i didn't see the point. seeing as how most of my experience with a daily drive was stop and go traffic.

i'm sure a lot of people put on diffuser just for the look of it.

reeves · 02-20-2013, 03:26 PM

That Borla diffuser looks pretty functional to me

..I hope other aftermarket companies will start making diffusers for their exhausts.

EarlQHan · 02-20-2013, 04:03 PM

Quote:

Originally Posted by Freeman

correct....but my point (many moons ago) was on a DD (daily driver) car i didn't see the point. seeing as how most of my experience with a daily drive was stop and go traffic.

What plucas said. If it is properly designed, on a production car you can increase downforce, decrease drag for a low weight penalty. On a race car, you gain obscene amounts of downforce through ground effects with negligible drag effects.

Quote:

Originally Posted by reeves

That Borla diffuser looks pretty functional to me

..I hope other aftermarket companies will start making diffusers for their exhausts.

The problem is you can't tell by looking. We can make assumptions but we have to know how it interacts with the rest of the vehicle to be certain.

Freeman · 02-20-2013, 04:13 PM

Quote:

Originally Posted by EarlQHan

What plucas said. If it is properly designed, on a production car you can increase downforce, decrease drag for a low weight penalty. On a race car, you gain obscene amounts of downforce through ground effects with negligible drag effects.

Yes I know.... My point was..... Ah hell who cares.

reeves · 02-20-2013, 05:05 PM

Quote:

Originally Posted by EarlQHan

The problem is you can't tell by looking. We can make assumptions but we have to know how it interacts with the rest of the vehicle to be certain.

I'd be happy if it just fills up that space where the stock muffler used to be and keep mud/debris from splashing up into that area. That's good enough functionality for a DD.

EarlQHan · 02-20-2013, 05:15 PM

Quote:

Originally Posted by Freeman

Yes I know.... My point was..... Ah hell who cares.

Quote:

Originally Posted by reeves

I'd be happy if it just fills up that space where the stock muffler used to be and keep mud/debris from splashing up into that area. That's good enough functionality for a DD.

For a DD that spends most of its time on local roads, staying under 45 MPH, I would say a diffuser is unnecessary, even if it may be slightly beneficial. If you do a lot of time on the highway, doing speeds of 60-80 MPH, you may benefit from an increased fuel mileage and it will also give you some more high speed stability.

norsamerican · 02-20-2013, 05:19 PM

seems like a simple enough DIY project.

Skurj · 02-20-2013, 05:31 PM

The borla exhaust is on my short list for a catback, and 80-90% of my driving is at 60mph+ so perhaps it might be an nice addition.. though I'd get some matte black paint, something durable before I would install that thing. That finish is completely the wrong colour...

AlvinT@Borla · 02-21-2013, 11:10 AM

Quote:

Originally Posted by Skurj

The borla exhaust is on my short list for a catback, and 80-90% of my driving is at 60mph+ so perhaps it might be an nice addition.. though I'd get some matte black paint, something durable before I would install that thing. That finish is completely the wrong colour...

The finish is a durable silver metallic powdercoat that you can customize as you please...

http://www.borla.com/products/2013_s...rt__77012.html

Thanks for your interest in Borla!

02-20-2013, 05:31 PM	#25
Skurj Senior Member Join Date: Nov 2012 Drives: SOLD... Location: GTA Ontario Posts: 955 Thanks: 56 Thanked 192 Times in 155 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	The borla exhaust is on my short list for a catback, and 80-90% of my driving is at 60mph+ so perhaps it might be an nice addition.. though I'd get some matte black paint, something durable before I would install that thing. That finish is completely the wrong colour... __________________ WRB MT BRZ Sport Tech Delivered March 21 2013 Its mine now!! Paid for Mar 2018 and its gone... Sept '18 tho I am sure I will miss it Replaced with 18 50th edition ND

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02-20-2013, 03:26 PM	#19
reeves Senior Member Join Date: Jul 2012 Drives: BRZ Location: ATL, GA Posts: 1,021 Thanks: 289 Thanked 397 Times in 265 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	That Borla diffuser looks pretty functional to me ..I hope other aftermarket companies will start making diffusers for their exhausts.

02-20-2013, 05:19 PM	#24
norsamerican Senior Member Join Date: Jan 2013 Drives: WRB BRZ Location: Houston Posts: 539 Thanks: 101 Thanked 233 Times in 112 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	seems like a simple enough DIY project.

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