Worth taking a look at issue 163 of "911 & PORSCHE World" available on the newstand now.

Very interesting new interview with Walter Rohrl.

His favorite 911? The SC RS in rally trim ....280hp and 214lb of torque....... and in street trim 255hp/188lb. in a 960kg. (2170#) car.

This hood doesn't look to be aluminum, but standard 911 stuff. I thought the hood and deck lid were aluminum on these cars. Or maybe it was just on the race cars that these pieces were aluminum.
http://forums.pelicanparts.com/uploa...1193345862.jpg

Wow, my eyes are bugging out. I have been reading over the various SC/RS threads for the last hour. Great info. Thanks for the links guys!

I have a few observations/questions (all based on the street SC/RS):

1. Is the rear bumper basically an IROC bumper with the lack of middle valence section for the muffler?

2. Does anyone know the reasoning that they did not use a full spoiler across the front, instead only using the corner pieces? Seems the fulle spoiler would have been more beneficial on the track. I think I remember one of teh Rothman cars having it all the way across.

3. Is that front valence basically the prototype for the Carreras that were soon to follow?, only without the fog lights?

4. OK, and now for the granddaddy... The early cars and 1974 were RS for SC'ish width flares and RSR for turbo-ish width flares. Why would they call this one an RS instead of an RSR, as they clearly have the wider flares on rear and front?

The hood, deck lid, front wings and door skins were all alloy on all cars as far as I know, but some owners have taken off the ally doors and wings and run steel to save the good stuff, so maybe he has done that.

I agree the underside looks very slightly different to my aluminium bonnet but maybe they stamped the frames differently back then.

They definitely used a full-width front spoiler. The front valance is quite different to that of a Carrera.

I think if you are going to keep this thread going you should merge it with the other big one.

How do you do that?

You ask a mod to do it for you (if that is what you want to do - it's your thread).

I have just read something saying the hoods and engine covers were also fibreglass, but I have seen Cibie 'boules' mounted through what I know was an original alloy bonnet on a roadgoing SC RS, so I don't know that this is correct information. I wil try and find out.

There is a piece on a Belgian roadgoing SC RS in this month's (I think) 911 Porsche World. Not read it as I sent the mag to a friend, so I dunno how technically accurate it is.

I have a '77 non-sunroof 930 chassis that will become an SC-RS clone someday, and have been looking for all the info I can find. To answer some of the questions above, this is what I found out so far.


"Reinforced steel body type 911 SC with front and rear bumpers as well as bonnet, boot lid, doors and front fenders all made out of GFK aluminum"
I plan on going the FG route...

The ride height and lack of a front spoiler/lower rear valence is due to the fact these were made for the purpose of entering a rally car in the 84 series.

The seats were not sparco;) They were the lollipop seats also used in the 935.
A retractable Y-harness was in the street cars (like the Schroth ASM) with full harnesses in the rally prepped cars.

Roll cage was a bolt in aluminum cage that bolts to permanently welded plates

According the the owner's manual the street version is rated at 255 HP, but all articles I have read state the rally tune was about 300. Some of the major components have multiple part numbers. Part numbers with an 'R' are "special part for rally" per the parts list.

The curb weight is listed as 2160.5 lbs. I don't know if this includes fluids or not.

GFK aluminum??

what is that? I thought GFK meant glass fiber reinforced kevlar...
maybe they bonded that to Al?

Don't know exactly what that GFK aluminum is, but that is exactly what is written in the owner's manual/parts list.

I know the decklid and rear spoiler is fiberglass over metal - it is the 77 Carrera tail on aluminum.

Brendon:

I know where a complete 911SC/RS tall butterfly MFI intake is,....

These are different from the RSR's due to provisions for that aircleaner.

Please let me know if you are interested.

This is definitely wrong - it's aluminium with fibreglass extension but the tail is not '77 Carrera, it's 3.2. The factory say there is an oil cooler in there but not on the ones I have seen. The street cars all run that blanked-off intake and the side air hose as far as I know. There was no cage in the road cars.

The street car is 1057 kilos wet and fully fuelled whatever that is in lbs, pretty sure that includes skid pans and the engine undercage etc. They are fascinating cars as a point in Porsche history.

johndglynn

You miss my point....I think. The SC/RS used a lot of turbo (Turbo-Look, if you will) pieces, including the Turbo/930 front spoiler. This was necessary to match up to the wider ( Turbo style) front fenders. Accordingly, there should be that lower rubber strip that runs across the car that is part of such a set-up.

Uniquely on the youtube car.... I don't see the lower rubber running across the car, just the corners of the rubber to match up with the fenders. The body piece under the front bumper itself is otherwise not shaped much differently than a normal, period correct Carrera.

Point?....we are admonished not to run a rear spoiler alone when such mods are done...but in this case it seems to work. The ride height of a normal ( not desert set-up) SC/RS is not higher than normal.

When running all the air in the engine compartment, especially under the grill area is relatively cold.

There were 2 options for the intake, the closed one as pictured and another w/open grill

http://forums.pelicanparts.com/uploa...1193405141.jpg

Yes, the hood, engine cover, front fenders and doors were aluminum
The glass was the thin variety
the f/r bumpers were GFK, kevlar reinforced f/g
gas heat on street cars.

2100# dry for the street 250hp version, no skid pans or engine cover

street 0-60 <5sec top 160mph per Auto Motor und Sport

the manufacturers plate says 1300kg
550 front, 900 rear I believe the latter info is for tire spec

There is a picture floating around somewhere, can't find it just this minute, showing all of the cars lined up for homolgation inspection. They all had the turbo(look) front chin spoiler. Obviously the rally cars removed them.

Mate, it is there, just hard to see in the vid, if you look under the car towards the end you can make out the black line. They are on all the road cars and some of the rally cars also depending on the event, though like Bill says, it is much more usual for the rally cars to be run with just a valance.

Most of the time the rally versions just use a filler piece on the bumper sides which stops about 6 inches inboard of the front arch, but they also sometimes use a deeper sort of 'flared 3.0 RS-style' one-piece front bumper. I think the Toad Hall car still has this fitted - I will hunt for a pic.

The SC RS was the car that brought me to the 911 and I have seen lots of them - even all this time later I will still go out of my way to see one if I hear it is going to be nearby. They are wicked.