Rear diffusor and wing install - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 12 Old 01-09-2011, 05:57 PM Thread Starter
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Rear diffusor and wing install

I know its not a mustang but I've been posting on this site for along time. Just wanted to share some pictures of me making and installing are rear diffusor and wing on a Porsche 968. He races in NASA with me in the GTS2 class.

Making the diffusor


mocking up the wing with ratchet straps and bungee cords. The green things hanging off the trailing edge are make shift plum bobs so I know where I am in relation to the rear bumper and the wood represents just shy of level.


I made this splitter back in the summer and posted a thread about it. All I did here was make the dive planes bigger and put some decals on it this time since a bunch of people kept asking who made it when he went to races.









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post #2 of 12 Old 01-09-2011, 08:11 PM
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Looks great, I remember when you posted the splitter info on the nasa site. Did you make the wing too?? Should make some serious downforce, looks to have a pretty substantial chord...
Hope to see you on track sometime, do you plan to make any NASA-MA events this year? I might try to make the watkins event, never been up there...
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post #3 of 12 Old 01-10-2011, 01:30 AM
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I can't see, what's backing the mounting plates up on the other side of the glass?
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post #4 of 12 Old 01-10-2011, 09:55 AM
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Very jealous of you guys that can use wings.

Some questions on the difuser.
  • What thickness of aluminum?
  • Is it welded or riveted together?
  • Do the uprights have a "T" or "L" bend on the bottom for stiffness?
  • What is the length?
  • How much does it weigh?
  • Is the car flat bottom?

I need to do some aero work on my car this season. I already have the splitter and a flat bottom is pretty easy. I need a spoiler (no wings in my class) and the rear of the car is already setup for a difuser, so I may do both at the same time.

TIA,

DaveW

Last edited by DaveW; 01-10-2011 at 09:58 AM.
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post #5 of 12 Old 01-10-2011, 05:34 PM Thread Starter
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Quote:
Originally Posted by edhunter View Post
Looks great, I remember when you posted the splitter info on the nasa site. Did you make the wing too?? Should make some serious downforce, looks to have a pretty substantial chord...
Hope to see you on track sometime, do you plan to make any NASA-MA events this year? I might try to make the watkins event, never been up there...
Ed Hunter
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I did not make the wing.

I plan to do Hyperfest. Do you know Jimmy Bost? Hes the one that got me into racing AI. And I plan to do the Glen toward the end of year.

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post #6 of 12 Old 01-10-2011, 05:35 PM Thread Starter
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Originally Posted by MFE View Post
I can't see, what's backing the mounting plates up on the other side of the glass?
thats top secret... Just some 1 inch square tubing attatched to the frame rails.

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post #7 of 12 Old 01-10-2011, 05:43 PM Thread Starter
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Quote:
Originally Posted by DaveW View Post
Very jealous of you guys that can use wings.

Some questions on the difuser.
  • What thickness of aluminum? .050
  • Is it welded or riveted together? countersunk rivits (approx 200)
  • Do the uprights have a "T" or "L" bend on the bottom for stiffness? Don't quite get what you mean. There is no bend on the bottom. There are tabs that come through the lexan and attach to the uprighs.
  • What is the length? the rear edge is about 18 inches. leading edge is 13. Keep in mind the uprights go through the lexan about an inch.
  • How much does it weigh? the wing is 10. the uprights are 5, and the tubing is 5 so the whole deal is only about 20lbs. The diffusor is 26 but ditching the factory wing and putting in lexan, everything only added approx 12lbs
  • Is the car flat bottom? No it is not. That is next on the customers list. this will also improve the efficiency of the diffusor.

I need to do some aero work on my car this season. I already have the splitter and a flat bottom is pretty easy. I need a spoiler (no wings in my class) and the rear of the car is already setup for a difuser, so I may do both at the same time.

TIA,

DaveW
what class do you race in?

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post #8 of 12 Old 01-10-2011, 09:01 PM
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post #9 of 12 Old 01-11-2011, 10:21 AM
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Looks like a thought out package. Nice install.

Darius Rudis

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post #10 of 12 Old 01-11-2011, 10:38 AM
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Quote:
Originally Posted by loudnslow98gt View Post
what class do you race in?
E Modified - Autocross.

We can't use wings, but can do spoilers, diffusor and flat bottom. With the TA body I use, I have a good splitter and it is clearanced in back for the diffusor.

Regarding the "uprights" I was asking about, I meant the ones on the diffusor. Do they have any bends on the bottom side for rigidity or are they good enough without?

EDIT: Never mind, I looked at the pics again and answered my own question.

Thanks,

DaveW

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post #11 of 12 Old 01-18-2011, 08:16 PM Thread Starter
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Originally Posted by drudis View Post
Looks like a thought out package. Nice install.

Thank you. I must compliment you on the work you have done on your car as well. Some very impressive stuff.

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post #12 of 12 Old 01-18-2011, 08:18 PM Thread Starter
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Quote:
Originally Posted by DaveW View Post
E Modified - Autocross.

We can't use wings, but can do spoilers, diffusor and flat bottom. With the TA body I use, I have a good splitter and it is clearanced in back for the diffusor.

Regarding the "uprights" I was asking about, I meant the ones on the diffusor. Do they have any bends on the bottom side for rigidity or are they good enough without?

EDIT: Never mind, I looked at the pics again and answered my own question.

Thanks,

DaveW
Oh, I am not familiar with SCCA's auto-x rules at all. The strakes on the diffusor just have a bend on the top. They aren't that large so they should be OK.

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