C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

EOS diffuser fins...nyone???

Thread Tools
 
Search this Thread
 
Old Jun 7, 2018 | 09:59 AM
  #21  
8SPD Z51's Avatar
8SPD Z51
Instructor
 
Joined: Feb 2016
Posts: 158
Likes: 38
From: Georgetown, ON Canada EH !
Default

Originally Posted by KAIJU
Any chance they would stay on with 3M automotive tape or is that a no go?

The pieces are not that heavy.
I suspect that a premium automotive double sided trim tape would hold. I didn't want to find out that it wouldn't though!
Reply
Old Jun 7, 2018 | 11:24 AM
  #22  
Zooki1's Avatar
Zooki1
Advanced
 
Joined: Apr 2018
Posts: 52
Likes: 5
From: Bartonville Illinois
Default

Originally Posted by Stew24
I picked up an 8 oz. can of OEM Delco Carbon Flash Metallic paint in a rattle can for $18 on Ebay. Should be enough to easily spray the four fins.
I would be interested in seeing yours after you paint them, are you going to primer them? I just bought some myself and was going to have a friend of mine that owns a body shop paint them (he still said it would cost me $100.00) but if yours come out good i may just go your route of painting them. Let me know if you would? Thanks
Reply
Old Jun 7, 2018 | 11:25 AM
  #23  
Zooki1's Avatar
Zooki1
Advanced
 
Joined: Apr 2018
Posts: 52
Likes: 5
From: Bartonville Illinois
Default

Originally Posted by 8SPD Z51
The EOS diffusers come in gloss black. I used some GM black metallic spray paint on them, matches pretty good.
Did you primer yours first or is it even needed?
Reply
Old Jun 7, 2018 | 02:37 PM
  #24  
Stew24's Avatar
Stew24
Thread Starter
Burning Brakes
15 Year Member
Conversation Starter
Liked
Top Answer: 1
 
Joined: Jul 2009
Posts: 853
Likes: 361
From: Maumelle AR
Default

Originally Posted by 8SPD Z51
I forgot to mention....since I drilled the holes oversize I used washers on the back end with the fasterners.
Here's a few pics....not great but you'll get the idea.


Before anyone comments on the dirty pipes....haven't cleaned them since a got the car March, 2016. That's over 2 years and 20,000 miles of exhaust. Opted for that rather than painting them black.
Hey dude!, that's cool! ...Gotta get mine done! So, the ones marked as "2"'s go on the driver's side, and the "1"'s to the passenger side? I think I'll shoot the carbon flash metallic this evening!, even though I think it's close enough to not worry about as it is.

Last edited by Stew24; Jun 7, 2018 at 02:40 PM.
Reply
Old Jun 7, 2018 | 02:54 PM
  #25  
8SPD Z51's Avatar
8SPD Z51
Instructor
 
Joined: Feb 2016
Posts: 158
Likes: 38
From: Georgetown, ON Canada EH !
Default

Originally Posted by Stew24
Hey dude!, that's cool! ...Gotta get mine done! So, the ones marked as "2"'s go on the driver's side, and the "1"'s to the passenger side? I think I'll shoot the carbon flash metallic this evening!, even though I think it's close enough to not worry about as it is.

Yes 2's on driver's side, 1's passenger.
Reply
Old Jun 7, 2018 | 02:56 PM
  #26  
8SPD Z51's Avatar
8SPD Z51
Instructor
 
Joined: Feb 2016
Posts: 158
Likes: 38
From: Georgetown, ON Canada EH !
Default

Originally Posted by Zooki1
Did you primer yours first or is it even needed?

I wet sanded them first and sprayed them with an adhesion promotor, prior to paint. Not sure it was necessary...
Reply
Old Jun 7, 2018 | 03:41 PM
  #27  
MitchAlsup's Avatar
MitchAlsup
Le Mans Master
25 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2000
Posts: 5,529
Likes: 1,943
From: Austin Texas
Default

On race cars, the fins in the diffuser channels are as thin as they can possibly be.
Reply
Old Jun 7, 2018 | 08:33 PM
  #28  
Stew24's Avatar
Stew24
Thread Starter
Burning Brakes
15 Year Member
Conversation Starter
Liked
Top Answer: 1
 
Joined: Jul 2009
Posts: 853
Likes: 361
From: Maumelle AR
Default

Originally Posted by MitchAlsup
On race cars, the fins in the diffuser channels are as thin as they can possibly be.
I ain't worried about racing, ... Just want it to look badass!!!
Attached Images  
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Jun 12, 2018 | 03:50 PM
  #29  
Zooki1's Avatar
Zooki1
Advanced
 
Joined: Apr 2018
Posts: 52
Likes: 5
From: Bartonville Illinois
Default

Originally Posted by Stew24
Hey dude!, that's cool! ...Gotta get mine done! So, the ones marked as "2"'s go on the driver's side, and the "1"'s to the passenger side? I think I'll shoot the carbon flash metallic this evening!, even though I think it's close enough to not worry about as it is.

Stew24.....Did you get your painted? If so i would be interested in seeing them if you would, also did you have enough paint with the one can?
Reply
Old Jun 12, 2018 | 04:20 PM
  #30  
Tort's Avatar
Tort
Racer
 
Joined: Mar 2018
Posts: 424
Likes: 96
From: CO
Default

I picked up a set of these and will be painting them tonight if I have time (GM Carbon Flash rattle can). I'll post some pics when I'm done with them....hoping to install this weekend. For those that have installed these, any tricks for installing without removing the bumper? I'm also thinking of splitting the difference of drilling and using 3M auto tape. I may just go with one bolt and then double side tape the whole thing. Not a fan of putting holes in the bumper...
Reply
Old Jun 12, 2018 | 04:48 PM
  #31  
Zooki1's Avatar
Zooki1
Advanced
 
Joined: Apr 2018
Posts: 52
Likes: 5
From: Bartonville Illinois
Default

Originally Posted by Tort
I picked up a set of these and will be painting them tonight if I have time (GM Carbon Flash rattle can). I'll post some pics when I'm done with them....hoping to install this weekend. For those that have installed these, any tricks for installing without removing the bumper? I'm also thinking of splitting the difference of drilling and using 3M auto tape. I may just go with one bolt and then double side tape the whole thing. Not a fan of putting holes in the bumper...
Definitely would like to see them, Thanks
Reply
Old Jun 15, 2018 | 07:27 PM
  #32  
Tort's Avatar
Tort
Racer
 
Joined: Mar 2018
Posts: 424
Likes: 96
From: CO
Default

Originally Posted by Zooki1
Definitely would like to see them, Thanks
Painted and turned out ok. Not completely happy with it but for a relatively cheap plastic part, meh. Lessons learned: don't bother with adhesion promoter spray; order 2 can of spray paint if getting the small OEM cans and don't bother sanding... causes way more work in the end. I'll install these tomorrow probably with follow up photos if I get to it.


Reply
Old Jun 15, 2018 | 08:52 PM
  #33  
Zooki1's Avatar
Zooki1
Advanced
 
Joined: Apr 2018
Posts: 52
Likes: 5
From: Bartonville Illinois
Default

Originally Posted by Tort
Painted and turned out ok. Not completely happy with it but for a relatively cheap plastic part, meh. Lessons learned: don't bother with adhesion promoter spray; order 2 can of spray paint if getting the small OEM cans and don't bother sanding... causes way more work in the end. I'll install these tomorrow probably with follow up photos if I get to it.

I think they turned out pretty good from what I can see in the photos and yes please send more after your install if you have time. I haven't done anything with mine yet and thanks for sharing this
Reply
Old Jun 15, 2018 | 10:44 PM
  #34  
///ADMAN's Avatar
///ADMAN
Melting Slicks
 
Joined: Oct 2013
Posts: 3,006
Likes: 477
From: Las Vegas Nevada
Default

I did mine in my back yard



The ACS ones have "flatter" blades. These others look quite rounded to me.


Last edited by ///ADMAN; Jun 15, 2018 at 10:45 PM.
Reply
Old Jun 16, 2018 | 06:58 AM
  #35  
Zooki1's Avatar
Zooki1
Advanced
 
Joined: Apr 2018
Posts: 52
Likes: 5
From: Bartonville Illinois
Default

Originally Posted by ///ADMAN
I did mine in my back yard



The ACS ones have "flatter" blades. These others look quite rounded to me.

Yours also look good, did you primer before or just paint them. I haven't decided to get them painted or try myself. Thanks for showing yours
Reply
Old Jun 16, 2018 | 11:04 AM
  #36  
JerryU's Avatar
JerryU
E-Ray, 3LZ, ZER, LIFT
Supporting Lifetime Gold
15 Year Member
Shutterbug
Liked
Community Favorite
 
Joined: Sep 2007
Posts: 34,932
Likes: 12,345
From: NE South Carolina
Default

Although for a more expensive recent offering from C7 Carbon my install PDF shows three ways to remove the lower OEM diffuser so you can install the fins refereed to in this thread: http://netwelding.com/Rear_Diffuser.pdf

There are my detailed step by step pics and text, one from C7 Carbon in their instructions and a third from a forum Post with good pics I include.

It also contains a lot of info and pics on what the fins do (they are actually called fences.) For fun bought a 300 page book on race car areo and put in some key points and pics from it. Most, like I did, are adding for "looks" but they are functional and provide rear downforce with less drag that a spoiler-at higher speeds!




More expensive but install info includes How To remove lower OEM Diffuser without removing the bumper so it can be drilled to hold simple fins or it!
Reply
Old Jun 16, 2018 | 06:25 PM
  #37  
FYREANT's Avatar
FYREANT
I'm Batman..
Supporting Lifetime
10 Year Member
Pro Mechanic
Liked
Community Favorite
 
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Default

Subscribed..
Reply

Get notified of new replies

To EOS diffuser fins...nyone???

Old Jun 16, 2018 | 07:06 PM
  #38  
Tort's Avatar
Tort
Racer
 
Joined: Mar 2018
Posts: 424
Likes: 96
From: CO
Default

Not impressed with the fit of the EOS fins. The template is garbage and while the fit may be acceptable for someones first car with upgraded hub caps, DIY bubbly window tint and rust spots covered with decals, it's not what I feel is an acceptable fit for our cars. You get what you pay and while I like the overall look, I'll be going with a molded single piece diffuser down the road. These fins look good from afar but up close the gaps are noticeable.
Anyone looking to go this route, definitely remove the stock diffuser. Can't image trying to get things lined up with it still on and would probably make the end result even worse fit wise.


Test fit

Reply
Old Jun 16, 2018 | 08:20 PM
  #39  
cyi1's Avatar
cyi1
Drifting
10 Year Member
 
Joined: Dec 2009
Posts: 1,867
Likes: 219
From: Atlanta GA
2018 C7 of Year Finalist
Default

I considered these fins before ordering my diffuser. Figured it would be a headache with installing it perfect aligned and having the paint match the carbon flash.

Went with APR Ver 2 and couldn't be happier.
Attached Images  
Reply
Old Jun 19, 2018 | 03:57 PM
  #40  
final gear's Avatar
final gear
Instructor
10 Year Member
 
Joined: Jul 2007
Posts: 219
Likes: 15
Default

Originally Posted by cyi1
I considered these fins before ordering my diffuser. Figured it would be a headache with installing it perfect aligned and having the paint match the carbon flash.

Went with APR Ver 2 and couldn't be happier.
It looks so good!
Reply



All times are GMT -4. The time now is 07:02 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE