Anyone know what the RPM should be at idle when warm?
#2
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Technical data for M48/00 engine (Cayenne S)
Engine design
Type
8-cylinder, four-stroke Otto engine, 90 ° V-engine
Crankcase
Horizontally divided light alloy cylinder block/crankcase without cylinder sleeves
Crankshaft
Forged steel
Crankshaft bearings
5 plain bearings, dia. 64 mm
Connecting rods
Forged and cracked, l = 155 mm
Con-rod bearings
Plain bearings, dia. 54 mm
Pistons
Light alloy casting
Piston pins
Floating
Piston rings
2 compression rings, 1 oil scraper ring
Cylinders
Aluminium/silicon running surface, mechanically exposed
Cylinder head
Two-part light alloy head, cross-flow cooling
Valve guide
Pressed in
Arrangement of valves per cylinder
2 parallel overhead intake valves
2 parallel overhead exhaust valves
Valve diameter
Intake 37.1
Exhaust 32.5
Valve lift
Intake
Exhaust
10 mm
9.85 / 8 mm
Valve control
Intake
Exhaust
Flat-base tappet
Flat-base tappet
Camshaft
Intake and exhaust camshafts driven via dual chain by the crankshaft.
Camshaft adjustment
Rotary-vane adjuster, 25° camshaft
Valve clearance
Hydraulic valve-clearance compensation
Timing at 1 mm valve lift and zero clearance, large valve lift
early/late limit
Intake opens at 19° before OT/31° after OT
Intake closes at 12° after UT/62° after UT
Exhaust opens at 22° before UT/34° before UT
Exhaust closes at 6° before OT/6° before OT
Engine
Engine type
M48/00
No. of cylinders
8
Bore
93 (3.66)
mm (in.)
Stroke
83 (3.27)
mm (in.)
Cubic capacity
4511 (275.2)
cm3 (cu. in.)
Compression ratio
11.5 : 1
Max. engine power
as per 80/1269/EEC
250 (340)
kW (HP)
Net power as per SAE J1349
340
HP
At engine speed
6000
rpm
Max. torque
as per 80/1269/EEC
420
Nm (ftlb.)
Net torque as per SAE J1349
310
ftlb.
At engine speed
2500 - 5500
rpm
Max. output per litre
55.6 (75.6)
75.6
kW/l (HP/l)
HP/l
Rpm limitation
by fuel cut-off and electronic throttle
with
manual transmission
Tiptronic transmission
6700
6500
rpm
Idle speed
580
rpm without air conditioning
(• Engine running
• Vehicle stationary
• Engine without load
• Engine temperature greater than 60 °C
• Intake air temperature greater than -10 °C)
Engine weight as per DIN 70020 A
kg
Manual transmission*
233
Automatic transmission
* including double-mass flywheel
Engine design
Type
8-cylinder, four-stroke Otto engine, 90 ° V-engine
Crankcase
Horizontally divided light alloy cylinder block/crankcase without cylinder sleeves
Crankshaft
Forged steel
Crankshaft bearings
5 plain bearings, dia. 64 mm
Connecting rods
Forged and cracked, l = 155 mm
Con-rod bearings
Plain bearings, dia. 54 mm
Pistons
Light alloy casting
Piston pins
Floating
Piston rings
2 compression rings, 1 oil scraper ring
Cylinders
Aluminium/silicon running surface, mechanically exposed
Cylinder head
Two-part light alloy head, cross-flow cooling
Valve guide
Pressed in
Arrangement of valves per cylinder
2 parallel overhead intake valves
2 parallel overhead exhaust valves
Valve diameter
Intake 37.1
Exhaust 32.5
Valve lift
Intake
Exhaust
10 mm
9.85 / 8 mm
Valve control
Intake
Exhaust
Flat-base tappet
Flat-base tappet
Camshaft
Intake and exhaust camshafts driven via dual chain by the crankshaft.
Camshaft adjustment
Rotary-vane adjuster, 25° camshaft
Valve clearance
Hydraulic valve-clearance compensation
Timing at 1 mm valve lift and zero clearance, large valve lift
early/late limit
Intake opens at 19° before OT/31° after OT
Intake closes at 12° after UT/62° after UT
Exhaust opens at 22° before UT/34° before UT
Exhaust closes at 6° before OT/6° before OT
Engine
Engine type
M48/00
No. of cylinders
8
Bore
93 (3.66)
mm (in.)
Stroke
83 (3.27)
mm (in.)
Cubic capacity
4511 (275.2)
cm3 (cu. in.)
Compression ratio
11.5 : 1
Max. engine power
as per 80/1269/EEC
250 (340)
kW (HP)
Net power as per SAE J1349
340
HP
At engine speed
6000
rpm
Max. torque
as per 80/1269/EEC
420
Nm (ftlb.)
Net torque as per SAE J1349
310
ftlb.
At engine speed
2500 - 5500
rpm
Max. output per litre
55.6 (75.6)
75.6
kW/l (HP/l)
HP/l
Rpm limitation
by fuel cut-off and electronic throttle
with
manual transmission
Tiptronic transmission
6700
6500
rpm
Idle speed
580
rpm without air conditioning
(• Engine running
• Vehicle stationary
• Engine without load
• Engine temperature greater than 60 °C
• Intake air temperature greater than -10 °C)
Engine weight as per DIN 70020 A
kg
Manual transmission*
233
Automatic transmission
* including double-mass flywheel
#5
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Thread Starter
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Thank you 911SLOW. I've been driving my 993 all summer which idles at 900 rpm. When I got back into my Cayenne I was concerned at the (seemingly) low rpm of 584 rpm. I can now stop worrying.