3.0 RS Info
02-29-2012, 12:08 PM
#1
Three Wheelin'
Thread Starter
3.0 RS Info
Does anyone have a good source of information about the 74 3.0 RS? I've been trying to do some reading about this car and can find very little information.
02-29-2012, 01:11 PM
#2
7th Gear
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John Starkey's book "Porsche 911 R-RS-RSR" had a chapter about it. The book is out of print, but here's the link to it on John's site - http://www.johnstarkeycars.com/pages/books/911_RSR.html
02-29-2012, 01:36 PM
#3
The 74 3.0 RS was a homologation run of 54 cars. The car was essentially a '73 RSR chassis, G series body with the '73 RSR flairs, a 3.0 single plug MFI engine. The cars had duel masters and reservoirs, duel fuel pumps, forged front cross member, transmission oil cooler in the FL fender. They came with 8 & 9 x 15 Fuchs. They also had steel RSR trailing arms, and 917/2.8 RSR calipers with the finger style parking brake. At least one had the factory install a sunroof after FIA inspection.
I have many detail photos on another computer, let me know if you would like some details.
I have many detail photos on another computer, let me know if you would like some details.
02-29-2012, 03:23 PM
#4
The 74 3.0 RS was a homologation run of 54 cars. The car was essentially a '73 RSR chassis, G series body with the '73 RSR flairs, a 3.0 single plug MFI engine. The cars had duel masters and reservoirs, duel fuel pumps, forged front cross member, transmission oil cooler in the FL fender. They came with 8 & 9 x 15 Fuchs. They also had steel RSR trailing arms, and 917/2.8 RSR calipers with the finger style parking brake. At least one had the factory install a sunroof after FIA inspection.
I have many detail photos on another computer, let me know if you would like some details.
I have many detail photos on another computer, let me know if you would like some details.
Just a few notes
the 911/77 aluminum block engine w/ 4 bearing cams and spread head studs was the first publicly available use of what would later be called the 930 block and head design, the later '76/77 Carrera 3.0 was the next n/a use of this engine.
to create a modern version start w/ a Carrera 3.0 engine(second choice would be an '80-83 3.0SC engine), use S cams and S MFI, w/ forged 9.8 Mahle pistons
Chassis is '74 w/ 9" & 11" flares f/g G series f/r bumpers, f/r hoods, r w/ 2 versions of the early whale tale(1 short street/1 long IROC), Glaverbel side(fixed) and rear glass, thin steel roof, floor, Instrument & door panels. street version had 8 & 9 x15 5 bolt Fuchs w/ 215/60 & 235/60 x15
according to Starkey 109 were sold, 50 were bult as race cars, another 15 were purchased by Penske for the IROC series(the IROC cars were fitted w/ the 3.0RSR version of the engine and delivered w/ ducktails which were swapped out for the long version whale tail.
the suspension was 19/26mm t-bars, 18/18 non adjustable sways(w/ mono-ball joints), Bilstein shocks, in the rear the short trailing arm w/ relocated mounts first seen on the late 2/7RS and 2.8RSR were used w/ mono-ball pivots, for race use steel or Ti auxiliary coil springs were added
brakes were the 2.8RSR 4 piston Brembos w/ dual(17/22mm) master cylinder and adjustable balance bar fulcrum,
02-29-2012, 04:47 PM
#5
Here are some I had on my iPhone, I will have to get the camera shots off a backup drive.
The homoligation cars had to have unique parts stamped with the cars vin # for inspection. FIA was getting smarter.
The homoligation cars had to have unique parts stamped with the cars vin # for inspection. FIA was getting smarter.
02-29-2012, 06:09 PM
#6
Three Wheelin'
Thread Starter
Wow! Great info guys. Thank you all very much. Any more photos you have would be much appreciated! BTW Does anyone have the latest Starkey 911 book? Does it include the same info as the older ones?
Last edited by Porsche917K; 02-29-2012 at 06:30 PM.
