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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 :mexicanwave: |
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 http://i25.photobucket.com/albums/c7...0_3251Half.jpg http://i25.photobucket.com/albums/c7...0_3252half.jpg http://i25.photobucket.com/albums/c7...0_3246half.jpg http://i25.photobucket.com/albums/c7...0_3250half.jpg |
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. |
yours looks like the Prins system Mike?
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Indeed it is. +++
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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.
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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. |
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. |
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 :ROFL: cya, Lee |
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