'77 & '75 Turbo Look 3.0

[boba]

Have to agree, they just look more purposeful. Less bling.

[letsrollbabe]

Had to get the 3.0 RS off the lift this morning, so rolled it outside for a few pics...with my phone...not so great, but some different angles. I don't like the way the slip-over rings fit, so will replace the chrome H4 rings with some black ones.

[keith]

still looking good, Gib!

Keith:
The 1974 RS, 3.0 l. M491 "for street use" has the 85 ltr. tank

The 1974 RSR, 3.0 l. M491 "competition type" has the 110 ltr. tank

According to Paul Frere, the racing RSR versions never got down to the 900 kg...most were 925 to 950 kg he says. The 3.0 RS was designed to be an 'evolution' of the Carrera 2.7 RS, which allowed the 3.0 RSs to remain in Group 3 where it 'proved virtually unbeatable' according to Frere. The plastic tank listing most likely would have been necessary on the homologation papers for the 'evolution' designation.

after this discussion (posts 315 through 331), and after peer pressure from comrade Hatz; I went with the 85L plastic tank on my RS-inspired '75 build, although there is no historical evidence that these cars were ever delivered with such tanks:

IMG_5183.jpg

but I believe it to be in the spirit of the '74RS 3.0 design, so...

Gib has graciously invited me to post build progress on this thread, so I'll update accordingly

[keith]

I also deleted my washer fluid reservoir in preparation for the relocate (seen here):

158268957.Q7DQeX30.25.jpg

and (after I finish a small design job for BK) I'm looking at making a run of these tabs, as well as the ones for securing the strap on the oil catch "can" in the engine compartment (upper right):

lrg-6679-img_9446.JPG

anyone else need one while I'm at it?

[letsrollbabe]

These pictures, one from the '75 factory brochure (lime), and one a factory photo show the 2 versions of the wheel lip finish for the 3.0 RS. Maybe it was optional, either polished or anodized, but both with gold centers. I like these pics because they show pure unmodified new 3.0 RSs.

[keith]

is it possible that (like other bits - center tunnels, for instance) the factory exhausted existing parts (rough anodized wheels) during the first year, and changed over to polished in '75?

[letsrollbabe]

The 3.0 RS started off as an homologation of the 73 RS/RSR program, and thus many features were carried over (including many parts). These 911s were the first PRODUCTION 911 to be built with only light weight features, including FG bumpers, light weight carpet, seats, sans glove box door, etc. It also carried over the 2.8 RSR 917 brakes, twin brake reservoirs, trailing arms, anti-roll bars, and body flares for 8+9 inch wheels. I think it also had a balance bar for brake bias adjustment. There was a tranny trombone cooler in the drivers side, plus the larger front spoiler mounted cooler for the engine. The engine was based on the late 2.8 RSR aluminum case, but built in milder form with 8.5 CR, single plugs, and the 2.7 RS induction and S cams which held the increase over the 2.7L RS engine to 20 hp...to 230 hp. Front torsion bars were the same as with the normal 911, but the rear bars were increased to 26 mm.

The car weighed around 2200 lb, and was probably at least 100-125 lb lighter than the 74 Euro Carrera 2.7 with a standard 911 interior and much heavier bumpers. So the 20 hp increase felt more like 50 hp to many magazine test drivers in the day. Paul Frere recorded 5.2 sec 0-60 mph, and once drove 78 miles on the Autostrada averaging 124 mph while being held up for 2 miles behind a truck. The Carrera 3.0 RS was not offered with a stock interior or bumpers like the 73 2.7 RS was...there were no conversion orders to take it back to 'street specs'. It was intended as an enthusiast's car with few compromises. It was the first 'production' 911 built with only 'Sports Purpose' equipment, and only 54 were built compared to approx. 1480 (not counting RSRs) 2.7L Carrera RSs (They were almost twice the price of a 73 RS at $25k). Like the 2.7 Carrera RSs, the 3.0 RSs were part of an homologation program (evolution to produce 100 cars) so that the 74 RSR could be built and raced...and indeed it did race...dominating European and US circuits for several years. The 74 3.0 RS/RSR program had a much larger impact on international racing than did the 73 RS/RSR program.

The specifications produced such a great car, the factory built 20-911 SCRS cars with almost identical specs 10 years later. While the Carrera 3.0 RS doesn't share the glory of the 73 Carrera RS in the public eye, knowledgeable collectors know the value these cars deserve. A few have sold for over $1 million when they come up for auction.

[pu911rsr]

Gib,

Couldn't agree more, for my money (not that I have $1m to spend on a car) I'd rather own 3.0 RS over a 2.7 RS. Appreciate the through education.

Phil

[928cs]

One car was delivered with a Touring interior, and another with a sunroof

[boba]

One car was delivered with a Touring interior, and another with a sunroof

The sunroof car was delivered as non-sunroof and sent back to the factory to have the sunroof added. Car has documents to that effect.