Jim bailey - 928 International

OK will someone with flip up early S-4 wing please place an empty plastic bucket on the wing then fill the bucket with water until it clicks down the wing and then weigh the bucket and water . That will approximate the lbs of downforce needed to click down a wing and for a 3400 lb car it probably will be a very small % of the "weight" on the wheels . Note that with the new angle of attack clicked down it probably has less downforce than it did clicked up . So was the wing designed by engineering , the styling department or marketing ??

justin

Thanks everyone, Now, does anybody have one to sell, I kinda want a GTS wing so I can paint to match, but I will buy a S4 wing if someone has one for sale.
Thanks

justin

UPDATE, I bought a S4 wing from Vertex, and now I need the measurements to mount it in the right spot on the hatch, could someone with this wing measure from the edge of the hatch to the wing base where it mounts to the hatch?
TIA

TroppoShark

Personally, I 've always liked the early eighties front and rear spoilers the most. I think they're stylish and unobtrusive, and a little less garish than later spoilers.

Why were the later spoilers developed, other than for novelty? Clearly, the earlier sharks didn't need them, despite being able to hit substantially the same speeds...

The spoiler I would entertain fitting on the earlier models is the roof spoiler which is available through Hong Kong. It fits at the top edge of the hatch glass.

One of the reasons I'm attracted to it is that I'm investigating how to put a row of led brake lights up high. For the stopping power of most P's, I'd like more prominant warning...

Phill.

SharkSkin

Eh... looks OK, do what you like. I'm gonna stay bareback.

justin

Hehe, Thats a good one.

Chuck Z

If the car didn't originally come with an S4 spoiler, why would you want to modify the car by drilling the holes necessary to mount the spoiler, you cannot undrill the holes? Why not sell your car and buy an S4 if that's the look you like? Just my opinion, I don't care for mods that destroy the original integrity of a car (unless of course it is a purpose built race car.....). If you must modify, which I too have done, why not stick to mods that are easily reversible, then you maintain the ability to put the car put back to stock if/when you want.

JE928Sx4.

Oooooo fun, I just put one on my 88. Can't wait to stain my shorts when that happens to me.

Garth S

Well Justin, - 'ya cain't please all the folks all the time, so take some time out to please yourself!
While it is an aesthetic modification only, I - and without exception, all who have been near my '80 have reacted positively to the OEM upgrades - S4 wing included. So, finish off your project if you choose - and wait a week or two before getting that S4, GT. or GTS. In the meantime, enjoy what you've got!
Dimensions: measured along the hatch curvature from the very tip on the rear corner, the two holes are centered at 185mm and 250mm respectively ( provided your wing bolts are still on 65mm centers.) The holes are inboard 14mm from the edge, and the studs are 6mm diameter.
Protect the finish with masking tape, and pencil on a layout: test fit the wing ( con a friend who doesn't have the shakes to help) - when all is right, center punch the metal ( to keep the drill bit from skating), and drill a 1/16 pilot hole: check again, and if still centered, drill 1/4". A 'rat tail' file can do any final fitting.
Underneath, you will need to cut the frame slightly with a sharp cold chisel, and a ball pein hammer to smooth out channels to allow access to the 10mm nuts to be installed - easy does it: Seal the top for leaks, and enjoy.

justin

Garth, Thank you very much for taking the time to measure and post! Thanks again,very good info.
Justin