|
|
|||||||
| D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again |
 |
|
|
Thread Tools | Display Modes |
|
#1
23rd March 2009, 04:07 PM
|
|||
|
|||
LPG or not LPG - That is the Question !!!
Hello everyone,
I am looking to buy one of these Fabulous cars A8 / S8 and i was wondering about getting it "Gassed" because i have read that some cars suffer from valve seat recession and wondered if these Beasts suffer from this......... Any help on this would put my mind at rest and it sure needs it at the moment cos i'm desperate to take the plunge and buy an 8 
|
|
#2
23rd March 2009, 05:08 PM
|
||||
|
||||
|
All I can say is get it done. valve seats are not an issue on these cars. Expect to pay about 2.5k to get a good sequential injection system. I paid off the cost of my install in 21k miles and have been laughing all the way to the bank since. I am getting the financial equivalent of 32 MPG from a V8!
If you do the mileage, you would be daft not to. My install    
__________________
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. 
|
|
#3
23rd March 2009, 06:14 PM
|
|||
|
|||
Just Do It!
It takes about £10k miles to pay for itself. If you are in or near Kent I know a great place to get it done.
|
|
#4
23rd March 2009, 08:20 PM
|
||||
|
||||
|
yours looks like the Prins system Mike?
__________________
Confidence is the feeling you have before you know better . . . .  Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble  Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
|
|
#5
23rd March 2009, 08:23 PM
|
||||
|
||||
|
Indeed it is.
__________________
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.
|
|
#6
24th March 2009, 03:03 PM
|
|||
|
|||
|
hello. i don't want to sound like an ignorant american, but what exactly is that system doing to extend or improve fuel economy? i haven't seen anything similar on any A8s here in the US.
|
|
#7
24th March 2009, 04:08 PM
|
||||
|
||||
|
The LPG is a second fuel system that piggy backs the petrol. When activated the petrol injectors are switched off and a second set of injectors let the LPG into the intake runners
The LPG has an ECU that intercepts the petrol injector signal, interprets it and fires the LPG injector. LPG gives about 80 to 85% of the MPG of petrol but is about 55% the cost.
__________________
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.
|
|
#8
25th March 2009, 01:27 PM
|
|||
|
|||
|
Can't beat gas. Both my A8's have been gas (My D3 was the BRC system) and the D2 is the Tartarini system.
The BRC is a million light years ahead of any I have seen. Prins is excellent, though the software isn't as good.
|
|
#9
13th April 2009, 12:07 PM
|
|||
|
|||
|
Hi Guys,
I picked up my S8 with a PRINS LPG system, very much like Conans. Pics on http://forum.a8parts.co.uk/showthread.php?t=665 I also have 90l tank in the boot. Seems to take 72-75l and i can do arround 250miles on that. LPG seems to come in round the 50p mark while cheap unleaded is 90ish and good stuff more like £1 ! My dash seems to think i get 18-22mpg, but working on bills/distance i get that more arround the 15 mark. I did get it down nearer to 12 for one trip but i had a heavy right foot (aproaching 4,000 revs). I think if i was careful on the motorway i could probably get it nearer to 18-20, but its too much effortless fun. Fuel stations are getting quite common and so far i haven't seen so much of the motorway rip off you get on unleaded. London also seems oddly cheap too. The filling pumps are a bit different but i like the fact that once locked on you press a button while stood up rather than bending over (god i sound like an old man at 35 here) I've found with mine if i have a reasonable amount of LPG in the tank it handles anything, but if its near empty using the kick down will switch it back to petrol however it will still maintain any speed i choose when i switch back. Takes about a mile for it to switch from petrol over to LPG in the mornings and i've also found it doesn't seem happy to start on LPG when warm (ie nip into the news agents on the way to work and i switch the button to petrol to start and straight back to LPG after) - Don't know if this is the norm or just mine. Switch over is seemless though, press the button wait a second and you switch over, no loss of power or acceloration while you do it, its almost like magic. One caveat, do not go for a cheap single point conversion, you want sequential multipoint....most the horror stories of LPG convesrions are from single. Also get a *GOOD* installer to fit it...i've heard of a few cowboys out there, best by recomendation. Mine was done by Northern Autogas who are supposidly quite good. Other benifits are that it can reduce your tax bill as you produce far less emmitions and means you can stick two fingers up to the eco-hippy people who say you are recless by having a gass guzzling V8  cya, Lee
|
|
#10
22nd April 2009, 04:10 PM
|
|||
|
|||
|
Quote:
|
|
|
|
Linear Mode
