back wind spoiler

hitman3 · hitman3's Garage

hi is any one have a good pic of how the back spoiler is connected to the back door i have a 1978 928 and i ot a back spoiler the one connected on the big back shild and i have been told that it sould be connected with some s type holders if you can send pic i will thank you in addvance

928SROCK · 07-14-2009, 02:29 PM

ice-hot · ice-hot's Garage

If your installing an S4 or GT wing it will be different. Is it an aftermarket or OEM, S or S4, all mount different. One things for sure, you need to drill, "78" had no spoiler's.
John

hitman3 · hitman3's Garage

Quote:

Originally Posted by 928SROCK

hi thank you for the quick help but i got the realy wide spoiler her is a pictures thank u in advance

Alan in AZ · 07-15-2009, 01:33 PM

Well - it just bolts on - it should have studs on it if its a factory wing and you need dome nuts washers and and a shim that levels up the folded underside sheetmetal of the hatch skin. You won't have these shims and likely won't find them but could make one. I'd use a strip af aluminum the same thickness as the hatch skin and cut to just over the length of the 2 studs and drill mounting holes overlapping its edge - so it levels out the underside of the hatch - then I'd use a washer over the top of this. The S4+ hatches have a recessed area to allow for the bolt heads - not sure how well this will work with the OB hatches you'll have to do trial & error. You will have to drill the hatch - make up a template to make sure you get the right spacing & locations. On the paint side a thin rubber or plastic gasket will help protect the paint .

Alan

hitman3 · hitman3's Garage

can u send some pic of the above do you say i have to drill 4 holes at the sides of the glass frme?

Alan in AZ · 07-15-2009, 03:36 PM

Yes you will need to drill into the hatch - likely 2 holes on each side of the hatch..

Do you have a stock foam wing with 2 studs each side ? or an aftermarket fiberglass - many of these have threaded inserts requiring bolts from the car side (this is in fact a lower profile attachment wrt the hatch so may be an easier fit on an older style hatch... Strosek & Jacquemond wings come like this...

Unfortunately don't have a picture handy - can someone with an S4 take a photo...?

Most of the cheaper fiberglass wings have some fitment issues with the stock holes on an S4 - at least you will be able to put the holes wherever you need them.

Alan

928SROCK · 07-16-2009, 07:54 AM

hitman3 · hitman3's Garage

hi alan the drowing is great help thank you very much

928SROCK · 07-16-2009, 12:52 PM

The name is Mark 928SROCK im glad that helps i took the pages from my cd factory service manuals. If anyone needs any other pics. of any part let me know.

Alan in AZ · 07-16-2009, 05:09 PM

The one shown is the rare spring loaded folding wing type (limited time in '87) you probably don't have one of these - however the mounting method is essentially the same for all other non-folding wings.

Just ignore the hinge etc comments.

Note the indented area into each side of the underside of the hatch - I'm guessing you don't have this since your hatch was not designed to have this kind of wing - see the shim though - its the same you need. If you look at the shim 'end-on' its thicker on one side then steps down on the other - the thicker side goes on the inside of the hatch nearest the glass and the thinner side goes on the outside on top of the wrapped around outer hatch skin. With the shim in place the back surface becomes flat, well supported & parallel to the front so you can bolt it down without it twisting.

Alan