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#1
22nd August 2013, 12:57 PM
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Engine from FL to PF
Hello!
I have one question for you. Is it possible to install engine from S8 FL (360 HP) to my A8 PF (300 HP). Which parts should I change? I have this part from S8 FL: engine, engine ECU, transsmision, transs ECU, rear diff.... Thanks
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A day you didn't learn something new is a wasted day :!: 
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#2
23rd August 2013, 06:37 PM
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Zdravo!
I think you have all the parts you need. I researched the part numbers when I was going to do a manual gearbox conversion, I think the front sub-frames are essentially the same. Hopefully someone more knowledgeable will come along soon with better advice. In the meantime make yourself an account on Vagcat http://www.vagcat.com/ Its a free online parts catalogue, you can see part diagrams and compare part numbers from PF to FL, if part numbers are the same then you know its good to go.
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#3
25th August 2013, 08:55 PM
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Hi there,
Your big issues are going to be the Can bus and instrumentation. The FL uses can bus from the each throughout the instruments. FL is also a fly by wire throttle so a pedel cluster change may be needed.
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Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. 
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#4
27th August 2013, 12:42 PM
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@Goran: thanks for link to vagcat
 From which country are you? @Conan_the_Librarian: I know, that I will have a big problem with a motronic harness...and with CAN-BUS  Tell me something.... If I change just transsmission and rear diff, what I get? More acceleration? Hire top speed?
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A day you didn't learn something new is a wasted day :!:
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#5
27th August 2013, 08:29 PM
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Changing the transmission is pretty straight forward physically. Use a matching rear diff. You'll get better acceleration but lower mpg. I don't know if the TCUs on a FL need Canbus, can't think why they would.
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Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light.
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