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Porsche Motorsport Division X51 PowerKit (320 PS/235KW)

doulas bader said:
Thanks GT-4 - most illuminating and explains why I couldn't find the centre rad on my Anniversary car (no extra safety margin on cooling for me, then - why did they leave the centre rad out on my car?).
Do you have the 3.6 X51 power curve comparison in a format I can download?

The Turbo/wide-bodied nose cars (ie C4S and Annivesary/40 Jarhe) do not have the third centre rad as they already feature the larger Turbo rads and front PU with matching larger apertures.

The third rad adds between 25% and 50% more cooling (this is based on both surface area comparison and the larger air pressure available at the centre of the frontal area, rather than aerodynamic edge bleed evident on the side rads).

I am not sure of the Turbo vs standard rads efficacy, but a simple surface area comparison would give an almost exact calculation.

If you click on the above jpeg you can save it to your PC etc.

Other than that version (which is slightly cleaned up and contrast enhanced), I have the page scan in PDF, which I can email if you PM me.

The actual source of the chart is the 996 3.6 Carrera brochure from circa 2003.

I only have a poor scan, if you could get hold of the original hard-backed brochure or a better scan, it will show it better.
 
GT4 said:
3.6
Power: 320 PS @ 6,800 rpm
Torque: 274 lb ft @ 4,600 rpm
Idle speed: 670 rpm
Rev limit: 7,300 rpm
Top Speed: 178 mph (285 kph)
Acceleration: 4.6s 0-60 mph (5.0s 0-100 kph)

4.6s to 60mph? Really? :floor:
 
Ant Blain said:
GT4 said:
3.6
Power: 320 PS @ 6,800 rpm
Torque: 274 lb ft @ 4,600 rpm
Idle speed: 670 rpm
Rev limit: 7,300 rpm
Top Speed: 178 mph (285 kph)
Acceleration: 4.6s 0-60 mph (5.0s 0-100 kph)

4.6s to 60mph? Really? :floor:


Autocar Road test 19/26 December 2001.

0-30 = 1.6
0-40 = 2.5
0-50 = 3.5
0-60 = 4.6
0-70 = 5.5
0-80 = 7.0
0-90 = 8.2
0-100 = 10.1

This was the best set I ever found. :thumb:
 
4.6 to 60mph is impressive. Must've been a speed yellow one they were testing, no...? :puh:
 
Ant Blain said:
4.6 to 60mph is impressive. Must've been a speed yellow one they were testing, no...? :puh:

No. Purely by coincidence and seriously ... it was Seal Grey. :grin:

edit = ps. It was wearing the same bodykit as yours though.
 
T8996C4 said:
Ant Blain said:
4.6 to 60mph is impressive. Must've been a speed yellow one they were testing, no...? :puh:

No. Purely by coincidence and seriously ... it was Seal Grey. :grin:

I was actually after Seal Grey (or some sort of blue) initially, but when I saw the yellow one in the metal it was obviously in so much better condition than anything else I'd seen I thought I would be mad not to buy it.



T8996C4 said:
It was wearing the same bodykit as yours though.

Must be the sideskirts giving it that performance edge... :grin:
 
Ant Blain said:
GT4 said:
3.6
Power: 320 PS @ 6,800 rpm
Torque: 274 lb ft @ 4,600 rpm
Idle speed: 670 rpm
Rev limit: 7,300 rpm
Top Speed: 178 mph (285 kph)
Acceleration: 4.6s 0-60 mph (5.0s 0-100 kph)

4.6s to 60mph? Really? :floor:

Porsche's official figures are 5.0s 0-62.14 mph

Usually the difference between 0-60 mph and 0-100 km/h times for the same car is 0.3 to 0.4 sec
 
doulas bader said:
What are the respective 0-100mph times?

AutoBild tests:

996 Carrera X51 345Hp
0-100Kph 4,7 Sec
0-160Kph 10,1
0-1000 Mts 22,7 Sec

996 Carrera 320Hp
0-100 Kph 5,0 Sec
0-160 Kph 10,8 Sec
0-1000 Mts 23,3 Sec

996x51engine.jpg
 
wizard993 said:
any owner who has this option fitted has won a watch but it was an expensive/eye watering option from the factory.

X51 cars are fetching up to £2k more :thumb:

Apparently, they are commanding a £4k premium on a trader's lot.
 
Slightly modified torque delivery stats courtesy of "Porsche 996 - The Essential Companion" by Adrian Streather

In my previous post, although peak power figures were quoted from Porsche AG with associated engine speeds, the peak torque figures were stated by Porsche without engine speeds. The engine speed ranges were extracted from "simplified" (ie marketing) charts.

These are now corrected:

Adrian Streather said:
3.4
Power: 300 PS @ 6,800 rpm
Torque: 258 lbft @ 4,600 rpm
Idle speed: 700 rpm
Rev limit: 7,300 rpm
3.4 X51
Power: 320 PS @ 6,600 rpm (corresponding to 252 lbft)
Torque: 266 lbft @ 5,000 rpm
Idle speed: 800 rpm
Rev limit: 7,400 rpm

3.6
Power: 320 PS @ 6,800 rpm
Torque: 273 lb ft @ 4,250 rpm
Idle speed: 670 rpm
Rev limit: 7,300 rpm
3.6 X51
Power: 345 PS @ 6,800 rpm (corresponding to 268 lbft)
Torque: 273 lbft @ 4,850 rpm
Idle speed: 670 rpm
Rev limit: 7,300 rpm

Just as another piece of trivia, the engine (under X51 modification), like the Turbo block under X50 or GT2 modification, gets a new engine designation code

Even as a retrofit the X51 (and X50) retrofit TSB covers the procedure for amending the physical engine stamping (as well as the Porsche AG engine database).

BASE CODE > REVISED CODE = DESIGNATION
M96/01 > M96/01S = 3.4 X51 POWERKIT (320PS) - DME 5.2.2 Cable throttle
M96/02 > M96/02S = 3.4 X51 POWERKIT (320PS) - DME 7.2 eGas throttle
M96/04 > N/A = 3.4 X51 POWERKIT (320PS) incompatible with Secondary Air Injection (SAI) / OBDII/LEV Euro3 compliance
M96/03 > M96/03S = 3.6 X51 POWERKIT (345PS)
M96/70 > M96/70E = 3.6 TURBO X50 POWERKIT (450PS)
M96/70 > M96/70S = 3.6 TURBO GT2 POWERKIT (462PS)
M96/70 > M96/70SL = 3.6 TURBO GT2 POWERKIT MK2 (483PS)
 

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Mmmm! Maybe there should be a separate forum for the X50/51 cars, between 996 and GT cars. Clearly a breed apart...

Anybody also also got the LSD?
 

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