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Engines

...Pictured here are most of the engine components that make a RSR an "RSR" racing engine! Take a look...
ST / RSR Engine Photos
:: ST / RSR Engine Photos :: 		911 RSR Marelli Twin-Plug Distributor (2.8 Liter)
:: 911 RSR Marelli Twin-Plug Distributor (2.8 Liter) :: 		911 RSR BOSCH Twin-Plug Distributor (3.0 Liter)
:: 911 RSR BOSCH Twin-Plug Distributor (3.0 Liter) :: 		Spark-Plug Wire Guide Brackets for Twin-Plug
:: Spark-Plug Wire Guide Brackets for Twin-Plug :: 		BOSCH CDI Boxes 911 RSR
:: BOSCH CDI Boxes 911 RSR :: 		1973 Porsche 911 RSR High-Butterfly MFI (2.8 Liter)
:: 1973 Porsche 911 RSR High-Butterfly MFI (2.8 Liter) ::
1974 Porsche 911 RSR Slide-Valve MFI (3.0 Liter)
:: 1974 Porsche 911 RSR Slide-Valve MFI (3.0 Liter) :: 		911 RSR BOSCH MFI Pump
:: 911 RSR BOSCH MFI Pump :: 		Bosch MFI Pump Support Arm
:: Bosch MFI Pump Support Arm :: 		Bosch MFI Oil-Line
:: Bosch MFI Oil-Line :: 		RSR Fuel Injection Line
:: RSR Fuel Injection Line :: 		BOSCH Fuel Injectors 911 RSR
:: BOSCH Fuel Injectors 911 RSR ::
226mm Magnesium Fan and Housing
:: 226mm Magnesium Fan and Housing :: 		911 RSR Fiberglass Engine Covers
:: 911 RSR Fiberglass Engine Covers :: 		911 RSR 3.0 Liter Crankcase, Aluminum Sand-Cast
:: 911 RSR 3.0 Liter Crankcase, Aluminum Sand-Cast :: 		Head-Studs Jackqueted
:: Head-Studs Jackqueted :: 		Intermediate Shaft and Straight-Cut Gears
:: Intermediate Shaft and Straight-Cut Gears :: 		Crankshaft Pulley 911 RSR
:: Crankshaft Pulley 911 RSR ::
70.4mm Factory Racing Crankshaft 911 RSR
:: 70.4mm Factory Racing Crankshaft 911 RSR :: 		Nitrated RSR Crankshaft
:: Nitrated RSR Crankshaft :: 		RSR Connecting Rods
:: RSR Connecting Rods :: 		92mm MAHLE Piston & Cylinder Set
:: 92mm MAHLE Piston & Cylinder Set :: 		Aluminum Cylinder Racing Air Deflectors
:: Aluminum Cylinder Racing Air Deflectors :: 		2.8 Liter 911 RSR Twin-Plug Heads
:: 2.8 Liter 911 RSR Twin-Plug Heads ::
3.0 Liter 911 RSR Twin-Plug Heads
:: 3.0 Liter 911 RSR Twin-Plug Heads :: 		Gears RSR Racing - Camshafts
:: Gears RSR Racing - Camshafts :: 		911 RSR Cam Towers, 47mm 4-Journals
:: 911 RSR Cam Towers, 47mm 4-Journals :: 		2.8 Liter 911 RSR Center-Lube Camshafts
:: 2.8 Liter 911 RSR Center-Lube Camshafts :: 		3.0 Liter 911 RSR Center-Lube Camshafts
:: 3.0 Liter 911 RSR Center-Lube Camshafts :: 		Solid Rocker Arms 911 RSR
:: Solid Rocker Arms 911 RSR ::
Lash Caps
:: Lash Caps :: 		Center-Lube Cam Housing Magnesium Covers
:: Center-Lube Cam Housing Magnesium Covers :: 		CenterLube Cam Seals - Porsche 901.105.592.01
CenterLube Cam Seals - Porsche 901.105.592.01		 Racing Oil-Filter Housing
:: Racing Oil-Filter Housing :: 		Flywheel 911 RSR
:: Flywheel 911 RSR :: 		Pressure Plate 911 RSR
:: Pressure Plate 911 RSR ::

comment | share
B oneil 11-May-2021 23:37
The IROC case has 83mm stud spacing vs 86mm spacing in the 74 version racing engine.
Roberto 01-Nov-2009 18:41
how much high butterfly for 911 3000 RS?
Thank you
slidevalve911rsr22-Feb-2007 04:08
Hello Steve,

The 74' RS and 74' RSR used the same Aluminum crankcase. The IROC I believed used the same case but I'm not 100% sure.

Here you see the engine of an IROC 911 with the High-Butterfly MFI and the later BOSCH racing twin-plug distributorhttp://www.pbase.com/slidevalve911rsr/image/54215033

To provide you a definite answer, I'll have to research my books which are packet away at this moment. Sorry I can't be of more help to you at this time.
steve 20-Feb-2007 05:05
How does the IROC case differ from RSR
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