Correct Under Engine Lid Spoiler Support

[BlueWing]

I was thinking of re-installing the rear spoiler on my 79SC. I originally removed it for the poor installation that a PO did and weight.

Plan is to re-install it on this lid and purchase a second lid for my tailess moods.

It was installed with just some speed clips and sheetmetal screws. It was shaky to say the least.

I do have some of the correct captive nuts on the way and now will need the under hood support bar.

I see the parts manual has a one piece support bar P/N 930 512 281 00 and also a two piece support P/N 911 512 283 00 and yet another two piece 911 512 284 00.

Here is a pic of my under engine lid if that helps.








Thanks in advance - Terry

[KTL]

Either support will work, one piece or two piece. I think Porsche created the two piece (which is just the one piece cut in half) to make removal and installation easier with an A/C condensor hanging on the engine lid?

[BlueWing]

Thanks Kevin, I didn't know why I thought maybe a difference in sheetmetal rib to surface distance.

Make sense the one piece looks like it would take a bit of twisting and feeding to get it thru.

It looks like our host sells the one piece reinforcement cheaper than I thought.

I'll try used first to match the car better and save a bit as well.

Thanks again
Terry

[uwanna]

I believe the P/N 930 512 281 00 single mount bar is for the larger spoiler base that mounts on a Turbo. The Turbo base needs a huge hole in the lid to fit the inter cooler. I have a 930 decklid and spoiler on my N/A
car and the single mount bar is located very near the bottom of the decklid. Noticed the other P/Ns had 911 prefix vs 930.

[BlueWing]

Hi uwanna, I see what you mean. If I zoom in on the parts catalog it does show a different contour to the vent grill area.

The rear spoiler that I have is the same base as the Turbo but with the Carrera rubber not a tea tray.

So the 930 part number does make sense seeing the fiberglass base is also a 930 number.

I harvested a few pictures from here and all have the 930 part number reinforcement .Couldn't find any of the 911 two piece. Could they be used for the fully rubber early tail?

So maybe the single reinforcement is the one I need anyway, the one for sale in the Pelican catalog has no picture.

Here is what it looks like with the spoiler on and dressed in the Gotties. I have since reinstalled the Fuchs, removed the rear spoiler and fog lights. I prefer it this way but the wife likes it looking like this.




Terry

[RSBob]

The wife is ALWAYS right. You must not have been married long.

[BlueWing]

Married tooooooo long, she bought it and I bought her a different car to take it over.

I am planning a repaint and it is one of the only ways I can get a nice engine lid.

I'll put in on for now, at repaint time install the tail less lid and have some wall art.

When we move and I register it in the new state it will be in my name.

Maybe she just really wants me to tell her she has a nice tail.

Terry

[KTL]

Not sure why the turbo/930 has the one-piece part but uwanna is correct that the parts diagram shows the 930 tail using the one-piece part.

I remember having a funny debate with my friend Mark (RIP) many years about the one piece vs. two piece. It was because his '86 Carrera (which I now own) has the one-piece and my former '87 Carrera has the two-piece. Of course one was better than two in his mind and so he poo-pooed my car for having the two separate pieces, thinking somebody had broken it in half. I said the parts diagram shows two pieces so whatever.

Whatever the reasoning, I can confirm that either of them fit the hole spacing of the Carrera tail. Note that M491 is Turbo-look and M473 is front and rear spoilers option

[uwanna]

Originally Posted by KTL

Not sure why the turbo/930 has the one-piece part but uwanna is correct that the parts diagram shows the 930 tail using the one-piece part.

I remember having a funny debate with my friend Mark (RIP) many years about the one piece vs. two piece. It was because his '86 Carrera (which I now own) has the one-piece and my former '87 Carrera has the two-piece. Of course one was better than two in his mind and so he poo-pooed my car for having the two separate pieces, thinking somebody had broken it in half. I said the parts diagram shows two pieces so whatever.

Whatever the reasoning, I can confirm that either of them fit the hole spacing of the Carrera tail. Note that M491 is Turbo-look and M473 is front and rear spoilers option

The big difference is the Turbo and M491 use a MUCH BIGGER
spoiler base than the Carrera type spoiler! Here's a pic of my Turbo verses the OP's decklid
spoiler, note how large a hole it has in the decklid to fit the inter cooler.

[KTL]

I understand what you're saying about the much larger hole in the lid. But it seems like the curvature of the spoiler bases are the same. Otherwise I wouldn't be able to use the one-piece support bracket under my Carrera spoiler?

I'm not trying to argue this issue, honestly. Just pointing out that the one-piece vs. two-piece thing is sort of a non-issue in terms of fitment. But i'm going by memory here so i'll take a look under my lid this evening and snap a picture of it. I'm starting to find that my memory isn't as good as it used to be when I see threads that I have participated in, and I sort of don't recall posting the information that I did!

[uwanna]

Originally Posted by KTL

I understand what you're saying about the much larger hole in the lid. But it seems like the curvature of the spoiler bases are the same. Otherwise I wouldn't be able to use the one-piece support bracket under my Carrera spoiler?

I'm not trying to argue this issue, honestly. Just pointing out that the one-piece vs. two-piece thing is sort of a non-issue in terms of fitment. But i'm going by memory here so i'll take a look under my lid this evening and snap a picture of it. I'm starting to find that my memory isn't as good as it used to be when I see threads that I have participated in, and I sort of don't recall posting the information that I did!

Wasn't disagreeing with you at all on the support bracket issue, guess I just phrased it wrong. I meant to point out to the OP that this statement was incorrect: The rear spoiler that I have is the same base as the Turbo but with the Carrera rubber not a tea tray.

[BlueWing]

The spoiler was installed by a previous owner so I don't know what base I have. I figured it to be a Carrera base with the Carrera Lip.

I have been working from the 78-83 Katalog and the images you guys used are from the 84 - 89 Katalog. And is quite different.

I should find that definitive thread on the rear spoilers and re-educate myself on the differences.

So I'll see if I can find 930 512 281 00 and if a two piece rail shows up I have that option.

Terry

[Flojo]

..

[JRSIII]

Attached below are photos of a Carrera Tail and a Turbo Tail from similar years. As you can see the profile of the base is much different. You could put a Turbo base on a non-turbo car, and I've seen it done quite a bit, but you can't put a Carrera base on a turbo car, as hole in the turbo decklid is much bigger as noted above. Technically, the two piece support is for the Carrera Tail, which would have been supplied with Option M473, and the one piece support is for the Turbo Tail. But also as noted, I can see any reason that either wouldn't work with either.

[JRSIII]

Attached below are photos of a Carrera Tail and a Turbo Tail from similar years. As you can see the profile of the base is much different. You could put a Turbo base on a non-turbo car (requires relocation of the Carrera emblem), and I've seen it done quite a bit, but you can't put a Carrera base on a turbo car, as hole in the turbo decklid is much bigger as noted above. Technically, the two piece support is for the Carrera Tail, which would have been supplied with Option M473, and the one piece support is for the Turbo Tail. But also as noted, I can see any reason that either wouldn't work with either.

[JRSIII]

OK I don't know why I posted this twice...

[KTL]

Agreed the footprint of the Turbo base is MUCH bigger. But the outline/width of the base at the rear of the tail seems to be the same as a Carrera base. Or it's just of matter of the bolt spacing being the same?

Here's a few pictures of my factory Carrera tail on the '86 with the one-piece support thing underneath, for whatever it's worth

[BlueWing]

Thanks John,

The Tale of Two Tails.

Ok I have the Carrera tail per your pictures.

Now it would make sense the one piece/two piece rail. The Turbo has minimal obstruction of the center lid structure, the Carerra has the structure from the latch all the way to the grill vent.

Installlation wise the single is easy due to less center support in the way on the Carrera the full length support would need a little twisting and turning to get under support.

So when looking for a rail they can be considered interchangeable.

Now to go further is there any advantage for cooling to open up the engine lid grill area under the tail. Even thou it is less than the Turbo opening it would be additional air flow.

When paint time comes around I would replace the lid anyway due to the bolt holes and a couple of dents left from the tail.

Terry

[BlueWing]

Thank you all. I sourced one. The one piece rail. I'll post some pictures once it's back on.

Terry