u7t2p7

Looking for the serial number sequence (range) that denotes a 993 cup car engine. I've seen information posted for RS engines but not engines that came from a cup car. Also, what if any are the differences between an RS and an engine that came out of a 993 cup car.

Bill Verburg

993 Cup used type M64/70 engine and type G50/30 transmission
serial #s
1993 63R 8001- 63R 80540
1994 63S 8001- 63S 80553
1995 63T 8001-63T 80550
1996 63V 8001-63V 80549
1997 62P 8570-62P 85734

u7t2p7

Perfect; thanks. Were they all 3.8L non varioram engines (RS and Cup)?

trophy

Differences as I know them. I am sure Bill has more info.

RS vs Cup Engine

RS
All RS used 3.8 Varioram engines ~300hp
Stock style exhaust, mufflers were a different part number though.
RS Cams for Hydraulic lifters.

Cup
All Cups Used 3.8 With Plastic Intake ('95 style) with no MAF ~310 to 315 hp
More aggressive cams, mechanical lifters
The Cups had no heat and a gutted cat, with near stock muffers

Bill Verburg

Pretty much as Trophy outlined
RS and RS/CS are all vram
Cup used a plastic '95 type manifold w/o maf, the fuel mixture was set vis w/ tps and map using a modified 55pin Motronic brain




cam timing events
RS- 1, 59, 47, 5,1mm overlap, 6840rpm, lift 12.5/11.1mm
Cup- 40, 92, 84, 50, 2mm overlap 7400rpm, lift 12.5/11.5mm

Kein_Ersatz

Encyclopedia 993 = 993 Wiki = Bill Verburg

hoggel

I don't think this adds much to the conversation but I like to post pics. This car was on display at the 2009 PCA Parade in Keystone CO. The sign labeled it a 1997 993 Carrera Cup 3.8 RSR.

H.H.Chinn

^^ The above photograph exhibits a rather odd phenomena to digital photography where the correct exposure of the engine compartment registers red but the rest of the red car blows out yellow orange. Sorry, not to hijack the thread.

hoggel

Now I have to post couple more pics. Is this a Cup or an RSR? Are they the same thing?

clubsport1

Looks like the real deal RSR (at least from photos....

An easy give away is that the cup does not have the central fuel tank filler or the Gt2 style bolt on arches...That's without looking at the engine ancillaries.

Cup and RSR are both narrow body, Gt2 has the bolt on arches on the wider body and a different rear spoiler to the car shown, to avoid confusion!

Bill Verburg

That's an RSR, they used a very different engine from the 993Cup

993RSR - M64/75 w/ ITBs and an aluminum resonance manifold, cam timing 80, 114, 104,65, 4.6mm@ overlap, also used g50/30 but had an optional g50/34 w/ cooler and 8:32 cwp

trophy

How would one overcome this?

HiWind

thanks as ever for the mainframe like recall Bill ... so would *63V80509* be a "correct number" for a 993 cup?

Bill Verburg

Yes, the other pics support that too

HiWind

thanks Bill!