daltvater

Can't seem to find a list of the differences. Could someone point me in the right direction?

bb993tt

I believe Adrian Streather shows a side by side comparison in his "993" book.

cgfen

how bout this as a starter?


from a post in a mr. verburg thread on pelican

The 993 RS is based on the standard narrow body road going 993 however
is heavily modified for track use, thus all
comfort and convenience components have been sacrificed in order to save
weight. Listed below are the body and
mechanical differences found the the 993 RS that vary for the standard
993 road car.

The engine is a M64/20 type 3.8 liter producing 300hp at 6,100rpm and
243 ft lb of torque at 5,000rpm.
-modified crankcase for larger 109mm bore in type cylinders (standard
993 utilized 107mm slip fit)
-modified camshafts with greater lift on intake and exhaust sides
-increase cylinder head ports and larger valves
-lightweight single mass flywheel (standard 993 utilized dual mass)
-single alternator belt drive with lightweight crank pulley
-solid rubber engine mounts (standard 993 utilized hydraulic version)
-magnesium Varioram intake plenum with larger tube diameter(standard 993
is aluminum)
-modified mufflers and catalyst for less back pressure
-no belt driven air injection for emission control
-larger injectors
-revised fuel and ignition mapping
-higher engine rev limit
-92 liter endurance type fuel tank

The transmission is based on the standard G50/21 of the standard 993 but
modified for motor sport purpose. The 993 RS
features the G50/31 the Clubsport featured the G50/32. Gearbox
modifications from standard 993 G50/21 are listed below.
-1st and 2nd gears removable from the main shaft to allow for different
gear sets to be installed(standard car has fixed
gears) gear ratios are taller in first and second than road car but
shorter in third through 6th gears.
-Clubsport version has same gear ratios however with smaller gear tooth
count (large teeth) to allow for extra strength
-Limited slip differential with different locking values based on
deceleration and load. Locking value under load 40%
locking value under deceleration 65%.
-Steel synchronizing rings in first through sixth gears (standard 993 brass)
-hardened transmission mounts
-reduced shift lever ratio from 4.2:1 to 3.4:1 with solid rod mount and
coupling (no rubber)
-993 Turbo sized rear drive shafts

The running gear of the 993 RS is heavily revised from the standard 993
road car, below the features are outlined from
the standard 993 road car.
-vehicle lowered 30mm in the front and 40mm in the rear.
-revised front wheel carrier to allow for more negative camber and
improved control arm and tie rod angle at lower ride
height.
-revised tie rods for lower ride height and wheel carrier
-harder rubber mounts for front control arms
-front stabilizer bar 23mm with 5 levels of adjustment
-progressive front and rear spring with higher spring rate
-"monoball" type strut mounting front and rear
-revised rear camber arm to allow for great negative camber settings
with harder rubber utilized for rear control arms
-shortened steering ratio with greater driver force for operation to
allow for greater feedback
-20mm rear stabilizer bar with 5 levels of adjustment
-wheels are 8" front and 10" rear with 18" diameter three piece
Speedline light alloy.
-enlarged front brakes 322mm with 32mm thickness, enlarged rear brakes
322mm with 28mm thickness with special
offset to allow for narrow body
-front strut brace under hood

The body of the 993 RS has been stripped of non-essential items (unless
ordered with additional equipment) in order to
save weight. The 993 RS is 280 pounds lighter than the standard road
going 993. The modifications and
parts omitted from standard 993 road car are listed below.
-reduced PCV underseal
-reinforced chassis (partial seam welded)
-no sunroof (not optional)
-no pneumatic front hood struts only aluminum prop rod
-no airbags standard (this vehicle ordered with airbags)
-preparations for fire extinguisher mounting
-no rear seats, sound deadening, rear belts, side panels, or associated
trim parts.
-aluminum front hood
-manual adjustable mirrors
-revised front spoiler for increased down force
-door rocker panel moldings for improved aerodynamics
-fixed rear spoiler for increased down force
-thin glass all around approx. 30% lighter than standard glass
-reduced windshield washer system container down to 1.2 liters
-36 amp hour battery (half the weight of standard 993 70 amp battery)
-no radio, no speakers, or cassette box in center console
-revised extended hub steering wheel three spoke (this car is standard
airbag type as optioned new)
-Recaro speedster type seating (this vehicle ordered with lightweight
sport type seats with no power adjustment)
-body colored seat belts, door pull straps, and "Carrera RS" script on
rear interior carpet
-manual windows (this car ordered with power windows)
-aluminum type curved shifter **** with crest
-simplified door panels with no door pockets, armrest, or pull handle
-manual door locking (no power)
-no dome lighting, interior lighting only in tunnel area
-no knee protector strips (this car is equipped with them as part of
airbag system)
-six point harness mounting consoles welded to chassis
-no alarm system, equipped with Porsche Drive block
-no lights for engine compartment, luggage compartment or ashtray
-no head light washing or beam adjustment
-no rear window defrosting
-no fan belt monitoring system
-no intermittent wiper switch
-no dashboard light dimmer
-revised wire harness for deleted items

daltvater

Perfect, thanks you very much! Time to slowly start chipping away at that list.

thanks,
Dan

Flying Finn

I have the official 993 RS booklet called: "993 RS Information Technik (WKD 499 620)" which has a lot of info you might like.

It's out of print but you can find it somewhere, or go with the easy way and send me your e-mail address to: badass993@gmail.com and I'll e-mail you a pdf copy of it. (courtesy of Jean-Pierre)

Bill Verburg

The bores are bigger and have an additional groove in the bore hole for a larger base sealing ring.

the I/O ports are +3mm from the '95 non v-ram motor an vram both of which are 43/39,

the RS intake valves are 51.5mm Na cooled vs nvram 49mm Na cooled vs vram 50mm Na cooled. The RS exhaust valves are 43.5mm Na cooled, vs nvram 42.5mm not Na cooled, vs vram 43.5mm non Na cooled

only the M003 RS/CS used the single mass f/w, the M002 RS used the same dual mass as the rest of the n/a 993s

none of the n/a Row 993s had this feature

the RS used G50/31, ratios are 3.154, 2.000, 1.522, 1.242, 1.024, 0.821
the RS/CS used G50/32, ratios are 3.154, 2.000, 1.522, 1.241, 1.031, 0.829

the /32 also used stronger shift forks

only std on RS/CS, opt on RS

Cactus

That was the best thing i read all week! Thanks Bill.

b5audia4

Thanks for the PDF Flying Finn.

NineMeister

At least £40,000 at current UK values.

HiWind

Great info as ever Bill!
Anyone know What size are stock C2 and larger RS injectors?

doc_porsche

great list.... thanks

espanolie

based on that list, there are a lot of differences. than again, that's what an RS is. thanks for sharing