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  1. #1
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    Gen3 4 Custom diffuser project

    I'm working on my own design for ACR-E style diffuser for Gen3/4. Two stainless steel outer blades are from eBay vendor, stock copies. I'm having a difficult time sourcing HDPE here in Kuwait for the extension strakes. I might make them out of aluminum or polycarbonate until I can get a suitable material. I imagine polycarbonate and even ABS will shatter/crack if I hit something.

    Mock up.
    custom diffuser 5.JPG

    Here is a Gen5 ACR-E for inspiration. Photo credit to Ralph Gilles via Doug Shelby.
    custom diffuser 4.JPG
    Last edited by LATAMUD; 02-04-2020 at 12:57 AM. Reason: Added text
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  2. #2
    I did this, added outside poly (25% larger, factory shape) mounted to aluminum angle 1x1; worked out good. Then I enclosed my rear wheel wells out to the rims. with a small lexan angle (1/2"x1/2") on the outside to add strength. I may remake it all with CF some day, but for now I am still testing. See attached

    https://grassrootsmotorsports.com/ar...-aerodynamics/
    You can teach a dog to fetch, therefore you teach a potato to dance! “Amazingly Bad Analogy”

  3. #3
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    Quote Originally Posted by pokeyl View Post
    I did this, added outside poly (25% larger, factory shape) mounted to aluminum angle 1x1; worked out good. Then I enclosed my rear wheel wells out to the rims. with a small lexan angle (1/2"x1/2") on the outside to add strength. I may remake it all with CF some day, but for now I am still testing. See attached

    https://grassrootsmotorsports.com/ar...-aerodynamics/
    Awesome. Your link takes me to a page, is there a specific section your project is posted? You and I do a lot of the same things to our cars ��
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  4. #4
    The page is just testing tools for us, no wind tunnel.
    You can teach a dog to fetch, therefore you teach a potato to dance! “Amazingly Bad Analogy”

  5. #5
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    Please post photos here. Love to see it.

    Quote Originally Posted by pokeyl View Post
    The page is just testing tools for us, no wind tunnel.
    IMG_20200204_223304078.jpg
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  6. #6
    Had to back onto the ramp to get a view.

    IMG_0252.jpg

    IMG_0253.jpg
    You can teach a dog to fetch, therefore you teach a potato to dance! “Amazingly Bad Analogy”

  7. #7
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    I like that. Side splitters too?

    Quote Originally Posted by pokeyl View Post
    Had to back onto the ramp to get a view.

    IMG_0252.jpg

    IMG_0253.jpg
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  8. #8
    Yes, the bolts are the roll bar mounts
    You can teach a dog to fetch, therefore you teach a potato to dance! “Amazingly Bad Analogy”

  9. #9
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    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  10. #10
    You doing this all in Kuwait?
    You can teach a dog to fetch, therefore you teach a potato to dance! “Amazingly Bad Analogy”

  11. #11
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    Quote Originally Posted by pokeyl View Post
    You doing this all in Kuwait?
    Yes, I have a 2 Bedrm apartment out here. The living room doubles as my workshop. Spare room is my storage. My home away from home.

    Polish_20200207_135641425.jpg
    Polish_20200207_135841029.jpg
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  12. #12
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    Last edited by LATAMUD; 02-07-2020 at 09:57 AM. Reason: Added photo
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  13. #13
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    Thats pretty awesome!! Good work, can't wait to see the finished product

  14. #14
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    Great job guys!
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  15. #15
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    Looks like the perfect apartment to me!! Keep up the good work and I look forward to seeing the final project. Cheers!

  16. #16
    When I am in Kuwait, it is in a tent.
    You can teach a dog to fetch, therefore you teach a potato to dance! “Amazingly Bad Analogy”

  17. #17
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    Quote Originally Posted by pokeyl View Post
    When I am in Kuwait, it is in a tent.
    Oh brother, I've been there, Zone6 bag drag.
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  18. #18
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    I need to remember the belly pan is upside down out of convenience for mock up.

    Kuwait has an industrial district, you can find just about anyone that can do anything to any material out there. Had an aluminum manufacturing shop with a beautiful hydraulic brake bend my edges 90 degrees for the extended strakes.

    Polish_20200209_203426377.jpg
    Polish_20200209_203442656.jpg
    Polish_20200209_203502070.jpg
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  19. #19
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    Very cool project i think Doug Shelby did something very similar in CF
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  20. #20
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    Quote Originally Posted by VIPER BAZ UK View Post
    Very cool project i think Doug Shelby did something very similar in CF
    Yes, Doug Shelby has a Gen5 diffuser kit. It might work on a Gen3/4 but I think the inside 4 strakes will be shallower due to the center vent on the Gen5.

    The new riv-nut tool arrived today. I still need to source some poly board to make my strakes. I have two rough drafts.
    Polish_20200219_164652271.jpg
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  21. #21
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    Is this for a track only car? Looks like an effective design, but I'd be afraid to street drive that.

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    Quote Originally Posted by z20ateU View Post
    Is this for a track only car? Looks like an effective design, but I'd be afraid to street drive that.
    I am tracking this car. The roads out here are horrible so I won’t be running the strakes on the street. As is, the standard 4 blades rub on speed bumps and driveway entrances.
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33

  23. #23
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    Quote Originally Posted by LATAMUD View Post
    I am tracking this car. The roads out here are horrible so I won’t be running the strakes on the street. As is, the standard 4 blades rub on speed bumps and driveway entrances.
    It's not the strakes that are too low it's the roads that are too high, ask those Kuwaitis to lower the roads for you, not like they don't have the money to do that

  24. #24
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    That gives me an idea. You could have the strakes on slots, so they could articulate with varying road conditions, much like the ground effects f1 cars of the early 80's. They would just become a wear item.

  25. #25
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    Quote Originally Posted by z20ateU View Post
    That gives me an idea. You could have the strakes on slots, so they could articulate with varying road conditions, much like the ground effects f1 cars of the early 80's. They would just become a wear item.
    I have thought of this. To split the strake in the middle and have the rear half pivot. It would still be functional on the track but also have some give on the street. Right now more work than I want to deal with. I'm going to test drive it on the street once it's done and assess the risk.
    Last edited by LATAMUD; 02-21-2020 at 09:26 AM.
    03 vert, 04 coupe, 06 vert, 08 coupe, ACRX #33


 
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