rear diffuser
Thread Starter
Instructor
Joined: Nov 2007
Posts: 188
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From: Louisiana
rear diffuser
does anyone offer an after market rear diffuser? i have seen some pics on the forum of some carbon fiber looking rear diffusers but was unable to find some on the net. Anyone know about any?
Team Owner
Joined: Jun 2007
Posts: 31,088
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St. Jude Donor '08 thru '13
The Lingenfelter one looks nice, particularly with the color-matched paint. It's on their site.
http://www.lingenfelter.com/store/ln-bk23.html
http://www.lingenfelter.com/store/ln-bk23.html
Le Mans Master
Joined: Jan 2001
Posts: 8,238
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From: Lakeland, Center of Florida Fl
The Lingenfelter one looks nice, particularly with the color-matched paint. It's on their site.
http://www.lingenfelter.com/store/ln-bk23.html
http://www.lingenfelter.com/store/ln-bk23.html
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Team Owner
Joined: Jul 1999
Posts: 50,808
Likes: 10
From: Buy USA products! Check the label! Employ Americans
The Lingenfelter one looks nice, particularly with the color-matched paint. It's on their site.
http://www.lingenfelter.com/store/ln-bk23.html
http://www.lingenfelter.com/store/ln-bk23.html
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Team Owner
Joined: Jun 2007
Posts: 31,088
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St. Jude Donor '08 thru '13
I'm well aware of what a diffuser is, and the channels on the rear fascia do serve to diffuse air as it exits from under the car.
Why someone would need a full-on diffuser, or even want to run one on a street car is beyond me, so I offered up the Ling. item. I've run in cars with diffusers, and they really only come into play at high speeds- much higher than any "normal" street car will see for a period of time that would necessitate the use of a diffuser.
200MPH- diffuser helps. Under 200- probably not necessary or much of an advantage in the C6, for most applications, thus my recommendation of the Ling. item. The stock "diffuser" should work just fine to keep the turbulence at the rear of the car manageable.
Why someone would need a full-on diffuser, or even want to run one on a street car is beyond me, so I offered up the Ling. item. I've run in cars with diffusers, and they really only come into play at high speeds- much higher than any "normal" street car will see for a period of time that would necessitate the use of a diffuser.
200MPH- diffuser helps. Under 200- probably not necessary or much of an advantage in the C6, for most applications, thus my recommendation of the Ling. item. The stock "diffuser" should work just fine to keep the turbulence at the rear of the car manageable.
Team Owner
Joined: Jul 1999
Posts: 50,808
Likes: 10
From: Buy USA products! Check the label! Employ Americans
I'm well aware of what a diffuser is, and the channels on the rear fascia do serve to diffuse air as it exits from under the car.
Why someone would need a full-on diffuser, or even want to run one on a street car is beyond me, so I offered up the Ling. item. I've run in cars with diffusers, and they really only come into play at high speeds- much higher than any "normal" street car will see for a period of time that would necessitate the use of a diffuser.
200MPH- diffuser helps. Under 200- probably not necessary or much of an advantage in the C6, for most applications, thus my recommendation of the Ling. item. The stock "diffuser" should work just fine to keep the turbulence at the rear of the car manageable.
Why someone would need a full-on diffuser, or even want to run one on a street car is beyond me, so I offered up the Ling. item. I've run in cars with diffusers, and they really only come into play at high speeds- much higher than any "normal" street car will see for a period of time that would necessitate the use of a diffuser.
200MPH- diffuser helps. Under 200- probably not necessary or much of an advantage in the C6, for most applications, thus my recommendation of the Ling. item. The stock "diffuser" should work just fine to keep the turbulence at the rear of the car manageable.
Team Owner
Joined: Jul 1999
Posts: 50,808
Likes: 10
From: Buy USA products! Check the label! Employ Americans
Team Owner
Joined: Jun 2007
Posts: 31,088
Likes: 23
St. Jude Donor '08 thru '13
Diffusers helps below 200 or even at and below 100 mph it makes the air exit faster with less turbulence under the car for a low pressure zone or down-force. There is no stock diffuser. There is a fascia with holes which lets air escape. I seriously doubt holes in a fascia straightens anything. Putting a diffuser on a Corvette with rear exiting exhaust would be near impossible. You also want the bottom of the car flat like a plate going to the diffuser. JMHO
We used to run one on our Unlimited car in Open Road Racing, and it really helped. But we didn't add it until the speeds got really high, so I'm not used to feeling a need for one until the numbers get big.
Team Owner
Joined: Jul 1999
Posts: 50,808
Likes: 10
From: Buy USA products! Check the label! Employ Americans
Good info, and I agree. I just wasn't sure the guy really wanted a true diffuser..........probably my bad, there.
We used to run one on our Unlimited car in Open Road Racing, and it really helped. But we didn't add it until the speeds got really high, so I'm not used to feeling a need for one until the numbers get big.
We used to run one on our Unlimited car in Open Road Racing, and it really helped. But we didn't add it until the speeds got really high, so I'm not used to feeling a need for one until the numbers get big.
They newer ones have about a dozen blades. I was looking at my die-cast and noticed the difference. Figured the cheeped out. Then I looked at the old picture of C5R and seen it was Right. They never bother to change it on the C5R I guess for $$ purposes on a die-cast car. I'll try to post diffuser pictures later.
World Challenge C5R cars opened up the license plate area for better aero. I bought the SAE paper on the wind tunnel testing they did on Mc Clures car few years back and mine is basically the same.
Team Owner
Joined: Jun 2007
Posts: 31,088
Likes: 23
St. Jude Donor '08 thru '13
When I think diffuser, I think race application only.
Here's a photo of the (I know, I know) Camaro we ran in the Open Road Racing events- decent shot of the diffuser- I lightened up the photo to view it on my poor work monitor, so it might come out a bit bright. 6 "blades". Worked great, so much so that the rear spoiler eventually was removed, and we got more top end due to less drag- the back end got real light, tho. Scary at 215...........
Car has side nascar-style exhaust.
Edit- this was right at launch- the front air dam would just drag on the ground when the car was standing still- hence the squat, and strange stance- and front end too high off the ground.
Here's a photo of the (I know, I know) Camaro we ran in the Open Road Racing events- decent shot of the diffuser- I lightened up the photo to view it on my poor work monitor, so it might come out a bit bright. 6 "blades". Worked great, so much so that the rear spoiler eventually was removed, and we got more top end due to less drag- the back end got real light, tho. Scary at 215...........
Car has side nascar-style exhaust.
Edit- this was right at launch- the front air dam would just drag on the ground when the car was standing still- hence the squat, and strange stance- and front end too high off the ground.
Last edited by scottycards; Jan 4, 2008 at 05:37 PM.
1st Gear
Joined: Apr 2009
Posts: 1
Likes: 0
Prototype Diffuser
I know this is an old post but here are some pics of a prototype diffuser in the works at Xtreme Motorsports in Florida from what I hear they are testing it at some HSR events and waiting on some wind tunnel time to get some real numbers on it.
http://motorsportsxtreme.com/slide_s...user/index.htm
http://motorsportsxtreme.com/slide_s...user/index.htm
Last edited by envyperformance; Jun 13, 2009 at 10:52 PM.
Safety Car
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