Rear Spoiler Pitch/angle
Is there a correct way to set the pitch of the rear spoiler? I have mine sat at the same rake as the rear window. I've seen them set at other angles and I was wondering what if any is the correct way to set it.
It depends what you want from the device.

In a race situation it provides down force to hold down the rear of the car. At normal road speeds the effect is minimal on either down force or drag.

The least drag and down-force will be provided by offering the narrowest profile to the air flow. Best LOOK will be a LITTLE nose down from horizontal IMO.
If I am not mistaken, the back edge of spoiler runs flush the top edge of the deck lid. This should set the angle. Not sure if this helps without a visual.
I am about to remove my rear spoiler which was installed by the previous owner. The top edge front to top rear is not parallel with the rear fast back slope. It is a bit higher so it catches air if not real tight and once flipped up all the way at 85 mph when it was not tight enough. No damage as it has internal limitations to prevent contacting the red painted areas. If it was being driven down as I believe it should be it should have turned down not up and back. he point of this is to press down some to add traction and stability but the opposite happens if it lifts upward.

When I remove it I will lengthen the slot ends on both sides to allow a bit more travel to lower the leading forward edge. Then grind down the internal stops some to allow the movement in the now lengthened slots. The top side finish had some minor issues like scratches which when an attempt to polish them out the sheen of the surface became more shiny. I plan to strip the surface and test exterior clear matte as a top coat to try to even out all the sheen to one appearance. I would not like to have to paint it but if required I would go with satin or semi gloss black the clear matte. If I do it it will be in my shop if I send it out I can buy a new one for less. It would be better to just get rid of the increased sheen but that one I have not figured out yet.

Anyone here ever deal with modifying the rear wing to tip down past the factory stops and have you ever painted one of these?


Possibly Related Threads...
Thread Author Replies Views Last Post
  I got a question about the rear seats, rookie restorer 3 4,012 10-30-2014, 06:19 AM
Last Post: rookie restorer

Forum Jump:

Users browsing this thread: 1 Guest(s)
Latest Threads
Repair a 1971-1973 Mustang urethane fron...
Last Post: muskan123
Yesterday 06:30 PM
» Replies: 10
» Views: 17214
Is this noise normal?
Last Post: 1969_Mach1
Yesterday 03:36 AM
» Replies: 11
» Views: 787
Rear brake issue
Last Post: Mustangmike
04-18-2019 09:46 AM
» Replies: 8
» Views: 370
Last Post: snah04
04-14-2019 10:47 PM
» Replies: 4
» Views: 997
70 Boss 302 - Night Mission build blog
Last Post: SWPruett
04-14-2019 01:29 PM
» Replies: 117
» Views: 92988
69 Mach 1 Headlight switch reinstall iss...
Last Post: combat32
04-12-2019 10:10 PM
» Replies: 9
» Views: 720
One piece headliners?
Last Post: SWPruett
04-11-2019 12:28 PM
» Replies: 9
» Views: 700
Garage Shots
Last Post: JTS71 Mach1
04-05-2019 09:51 AM
» Replies: 24
» Views: 15187
Last Post: 1969_Mach1
04-03-2019 11:59 AM
» Replies: 63
» Views: 57126
Why are Americans so stupid? Stop buying...
Last Post: mymachone
04-02-2019 09:14 PM
» Replies: 9
» Views: 9160
Need Data plate decode help pls.
Last Post: Aris
03-30-2019 05:33 AM
» Replies: 6
» Views: 1082
1969 Mustang Paint Codes & Colors
Last Post: BLACK JADE 69
03-28-2019 02:46 AM
» Replies: 25
» Views: 15078
Been Awhile... '71 Rustang
Last Post: Mister 4x4
03-25-2019 07:22 AM
» Replies: 144
» Views: 116960
Throwback Picture
Last Post: Oztrailer
03-22-2019 07:05 PM
» Replies: 2
» Views: 641
1973 Mach 1 parts
Last Post: Oztrailer
03-21-2019 07:39 PM
» Replies: 7
» Views: 1736
Will buy parts in real good condition or...
Last Post: shopcarpro
03-21-2019 10:39 AM
» Replies: 2
» Views: 657
Manual Trans Gear Oil
Last Post: JTS71 Mach1
03-21-2019 10:21 AM
» Replies: 11
» Views: 1500
Last Post: Mustangmike
03-07-2019 09:03 AM
» Replies: 69
» Views: 27308
My Newest Project - My Youngest Child
Last Post: Steven Harris
03-05-2019 11:56 AM
» Replies: 39
» Views: 11641
1971 moch 1
Last Post: JTS71 Mach1
03-04-2019 07:11 AM
» Replies: 16
» Views: 2015