Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
991 : 2011- 20
997 : 2004- 70
996 : 1997-2005 30
993 : 1993-1998 5
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 1
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 0
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 22
Cayman : 2005- 15
Cayenne : 2003- 2
Macan : 2014- 2
Panamera : 2009- 1
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Sat Jun 18, 2011 11:18 pm    Post subject: Reply with quote

Some more on that crated engine:





 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Sun Jun 19, 2011 12:28 am    Post subject: Reply with quote

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 wrote:
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)
 



X51 RETROFIT.jpg
 Description:
 Filesize:  67.89 KB
 Viewed:  14239 Time(s)

X51 RETROFIT.jpg


  
View user's profile Send private message
   
doulas bader
Spa-Francorchamps


Joined: 03 Dec 2008
Posts: 295



PostPosted: Sun Jun 19, 2011 6:22 am    Post subject: Reply with quote

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?
 
  
View user's profile Send private message
   
mankers
Newbie


Joined: 14 Nov 2009
Posts: 45



PostPosted: Sun Jun 19, 2011 9:12 am    Post subject: Reply with quote

^ Do you know the option code for LSD?
 
  
View user's profile Send private message
   
doulas bader
Spa-Francorchamps


Joined: 03 Dec 2008
Posts: 295



PostPosted: Sun Jun 19, 2011 11:26 am    Post subject: Reply with quote

no - but I know a man who does...
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Sun Jun 19, 2011 1:09 pm    Post subject: Reply with quote

mankers wrote:
^ Do you know the option code for LSD?


Option code depends on 2WD or AWD.

M220 = 2WD nonPSM = 40% (or dialable to 65% for track work)
M220 = 2WD with PSM = 22% (or dialable to 27% for track work)
X75 = AWD PSM standard = 22% (or dialable to 27% for track work)

Adjustment is via the diaphragm spring rates.

The PSM compliant low-locking 22%LSD was developed and offered after 2003 (MY2004/2005).

The low-lock LSD can be retrofit to any MY2004/2005 manual 996 (2WD or AWD).

There is no Tip compliant variant.

AWD LSD was not production line spec'able.

So if you had a MY2004/2005 C4, C4S or even Turbo,Turbo S you had to request an off-line factory bespoke mod.

The vehicle was built as normal then sent to the Special Wishes dept to be fit out with the PSM compliant 22/27% LSD.

As this was an "Exclusive" order it bears the code "X75".

Needless to say, this process added considerably to the order process (up to an additional 12 weeks).

It is debateable how much effect a 22% LSD (M220) model actually dynamically outclasses the standard Automatic Differential Lock (M224) on PSM equipped cars.

One big issue is the LSD is a wear and tear item and therefore without maintenance and replacement a worn M220 equipped car may fail to outperform an M224 car.

Then the LSD is just more weight at the back doing nothing!
 
  
View user's profile Send private message
   
mankers
Newbie


Joined: 14 Nov 2009
Posts: 45



PostPosted: Sun Jun 19, 2011 4:59 pm    Post subject: Reply with quote

^ I expected 3 or 4 alpha numeric characters! Cheers GT4 that's certainly a comprehensive reply. Smile
 
  
View user's profile Send private message
   
baptistsan
Monza


Joined: 19 Dec 2006
Posts: 164
Location: suffolk


PostPosted: Mon Jun 20, 2011 11:33 am    Post subject: Reply with quote

Really tempted to chuck all of this on the car.

Modified oil pan partition box (larger alloy baffles with aperture valving replaces small plastic baffles).

Uprated exhaust gasket for larger exhaust ducts.

Adapted exhaust manifolds with larger cross-section and optimized flow behaviour.

Optimized inlet and exhaust ducts (machined and polished).

Modified intake system (modified cross-section - sand cast aluminium replacing plastic).

Assume I'd also need the modified oil pump to go with the new sump?

Worth doing or just a waste of time and money?
 
  
View user's profile Send private message Send e-mail
   
Stuart
General
General


Joined: 16 Sep 2007
Posts: 5080
Location: Waterworld

2004 Porsche 996 GT3 Mk2

PostPosted: Mon Jun 20, 2011 11:50 am    Post subject: Reply with quote

baptistsan wrote:
Really tempted to chuck all of this on the car.

Modified oil pan partition box (larger alloy baffles with aperture valving replaces small plastic baffles).

Uprated exhaust gasket for larger exhaust ducts.

Adapted exhaust manifolds with larger cross-section and optimized flow behaviour.

Optimized inlet and exhaust ducts (machined and polished).

Modified intake system (modified cross-section - sand cast aluminium replacing plastic).

Assume I'd also need the modified oil pump to go with the new sump?

Worth doing or just a waste of time and money?


The real benefit to the X51 is the additional cooling, internals and oil pick up, these are not cheap add on components. Everything else is your standard free(-er) flowing exhaust/ intake system, available from any aftermarket tuner.
As a package it's extremely expensive to retrofit properly and you will not recieve this back come resale.

Saying that I've added the oil pan (no extra pump) and the centre rad, I figured every bit helps...

Dont know
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Sun Dec 22, 2013 10:17 am    Post subject: Reply with quote

Forgot to post the Power-up Edition photo:

 
  
View user's profile Send private message
   
ras62
Hockenheim


Joined: 20 Jan 2012
Posts: 641
Location: Cheshire


PostPosted: Sun Dec 22, 2013 3:02 pm    Post subject: Reply with quote

Am I correct in assuming the X51 engine use the same IMS bearing as the standard car and therefore it is also prone to failure?
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Mon Dec 23, 2013 2:49 pm    Post subject: Reply with quote

Yep.

But the high-G sump and dual oil pumps upgrade the block lubrication in general.
 
  
View user's profile Send private message
   
ras62
Hockenheim


Joined: 20 Jan 2012
Posts: 641
Location: Cheshire


PostPosted: Mon Dec 23, 2013 10:46 pm    Post subject: Reply with quote

Thanks GT4. You have most likely seen this site but it was new to me and very informative. http://www.imsretrofit.com/ims-101/
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Mon Dec 23, 2013 11:16 pm    Post subject: Reply with quote

Thanks, but yes (Early 2010 in the US, mid 2010 in the UK):

http://www.911uk.com/viewtopic.php?t=55510
 
  
View user's profile Send private message
   
DrMEMS
Newbie


Joined: 13 Mar 2015
Posts: 6



PostPosted: Sat Mar 14, 2015 6:47 pm    Post subject: Reply with quote

GT4:

This is great information! My book by Adrian Streather didn't differentiate between the 3.4- and 3.6-liter X51 engines. I'm having a 3.6-liter 996 X51 engine rebuilt right now. The builder took photos showing the X51 camshafts (they had "KIT" stamped on them) but didn't see anything different about the pistons (as you noted above, the 3.6-L X51 pistons are the same as stock). The engine block serial number starts off with "M96/03S", so I can tell that it is indeed an X51.

Based on what you said about the intake manifolds (parts 11 and 12 in the exploded diagram) being larger inside, I'll buy those, probably new from Porsche in Germany, as I haven't been able to find them used.

Do you have an exploded diagram showing parts 1-6 that you can post so I can tell what else is different from stock?
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Sat Mar 14, 2015 11:04 pm    Post subject: Reply with quote

Will update next time I am in front of my PC.
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Wed Mar 18, 2015 10:44 am    Post subject: Reply with quote

Exploded diagram 1-6 and pdf of detailed differences 1-12



X51 Detailed Differences
 
  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Wed Mar 18, 2015 11:08 am    Post subject: Reply with quote

Some more piccies:

1 = X51 upgraded dual chamber oil pump and additional return line
2-6 = X51 high-G vs std sump baffles and mating flanges
 



IMG_0847(2).JPG
 Description:
 Filesize:  80.63 KB
 Viewed:  8449 Time(s)

IMG_0847(2).JPG



IMG_0849(2).JPG
 Description:
 Filesize:  104.85 KB
 Viewed:  8449 Time(s)

IMG_0849(2).JPG



IMG_0853(2).JPG
 Description:
 Filesize:  91.87 KB
 Viewed:  8449 Time(s)

IMG_0853(2).JPG



IMG_0850(2).JPG
 Description:
 Filesize:  79.08 KB
 Viewed:  8449 Time(s)

IMG_0850(2).JPG



IMG_0851(2).JPG
 Description:
 Filesize:  63.32 KB
 Viewed:  8449 Time(s)

IMG_0851(2).JPG



IMG_0852(2).JPG
 Description:
 Filesize:  68.89 KB
 Viewed:  8450 Time(s)

IMG_0852(2).JPG


  
View user's profile Send private message
   
GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire


PostPosted: Wed Mar 18, 2015 12:35 pm    Post subject: Reply with quote

And exhaust system comparison
 



X51-headers.jpg
 Description:
 Filesize:  132.37 KB
 Viewed:  8434 Time(s)

X51-headers.jpg


  
View user's profile Send private message
   
DrMEMS
Newbie


Joined: 13 Mar 2015
Posts: 6



PostPosted: Wed Mar 18, 2015 4:24 pm    Post subject: Reply with quote

Thanks for taking the time to document this. It seems like the X51 "power package" is as much about lubrication reliability as added power.

Previously you noted that for the 996.1 3.4-L engine, the pistons are different for X51 than for standard, while for the 996.2 3.6-L engine, the pistons are the same for X51 and standard. Are there any other differences you know of between X51 engines for the 3.4- and 3.6-L engines?
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Goto page Previous  1, 2, 3, 4, 5, 6, 7, 8  Next
Page 3 of 8

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum