Search found 13 matches

by v8gas
Sat Dec 22, 2018 11:10 am
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Just a quick update Now covered 25,000 miles on LPG -no problems not seen any engine lights for years. Wierdly my fuel consumption displays correct mpg on gas- 21mpg confirmed by fuel use. -I think its due to the way I set it to run slightly weak on gas which the fuel trim then adjusts fooling the f...
by v8gas
Wed Jun 08, 2016 11:50 am
Forum: European Union - Excludes UK
Topic: LPG in France Currently
Replies: 30
Views: 13745

Re: LPG in France Currently

Just completed a trip to sarlat France covered 1550 miles. No problem in Belgium. In france we hit the fuel crisis and had to que for an hour near Auxerre, with Gendarmes conrolling traffic- in the end, - limited to 30euros worth for all fuel types. As you go further south it gets less of a problem....
by v8gas
Wed Jun 08, 2016 11:34 am
Forum: Gas Stations, Prices and Economy
Topic: Trip to europe
Replies: 2
Views: 1915

Trip to europe

Just completed a trip to Sarlat France, covered 1550 miles. I took 2 adapters with me, the Acme style for Belgium and the dish style for France.My dish adapter was aluminium and not well made I had to be very carefull about tightening to stop the "O" ring blowing out, everyone looks to see whats hap...
by v8gas
Fri May 20, 2016 12:56 pm
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Further information about my conversion. Now done about 10,000 miles on lpg and the only problem Ive had is that the petrol injectors started to occasionally misfire on startup from cold I guess from lack of use. I put some expensive grade petrol with cleaning additives in and it seems to have cured...
by v8gas
Mon Oct 12, 2015 12:15 pm
Forum: General Discussion
Topic: How far do you get with LPG? eg. How many miles for £10
Replies: 179
Views: 411310

Re: How far do you get with LPG? eg. How many miles for £10

BMW E65 745i 4.4 litre V8 330bhp

Running on unleaded petrol gets 25 mpg

Running on LPG gets 23 mpg - reads 0.01 on exhaust gas analyzer for mot

These figures are over several hundred miles - no difference in power between LPG and petrol

so price wise lpg costs about half petrol
by v8gas
Thu Jul 09, 2015 3:16 pm
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Thanks for the replies. I think I found the main problem. I found out that even after clearing the lean fuel codes that the fuel trims stay at their last positions until reset with BMW software--there is no other way of doing it. I have BMW INPA diagnostic but could never see the info on fuel trims....
by v8gas
Tue Jul 07, 2015 3:32 pm
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

My gas pressure definately changes as MAP changes, I thought this was normal. My reducer is set at 1.65bar gas pressure at atmospheric. As the MAP shown changes then the gas pressure shown changes to always add up to 1.65bar . If I pull the vacuum pipe off the reducer when running the gas pressure s...
by v8gas
Mon Jul 06, 2015 11:44 am
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Thanks for the suggestion about pulling pipes off the sensor, I've tried each in turn but not both i,ll try that. I was working on the KME gold reducer having a maximum working pressure of 1.7 bar, which is what they quote. This is doing my head in! I find it easier to visualise in Psi because I,m o...
by v8gas
Sun Jul 05, 2015 12:01 pm
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Thanks but I find the answers confusing. Are you saying that the Manifold pressure shown by the stag software is wrong? I understand that the gas pressure shown is effective pressure and not absolute and any figures I refer to are effective pressure as shown in software-- MAP 0.35 gas 1.1--so if you...
by v8gas
Thu Jul 02, 2015 11:13 am
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Thanks Simon for your assistance with the car, really helpfull. Yes it still has a problem at tickover- mixture going weak. Code 272C/D Additive Adaptation - Control Limit Reached-System Too Lean at Idle. Have now driven 1200 miles and get 20 mpg on gas. It can go all day on the motorway without eng...
by v8gas
Thu Apr 30, 2015 12:21 pm
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Hi Simon thanks for A very thorough answer. aaaaaah now I see what you mean. I would always go for a rich rather than lean mixture with gas since the cat temperatures can rise several hundred degrees above normal when lean. The fact that the N62 engine uses a vacuum pump for the brake servo does sug...
by v8gas
Wed Apr 29, 2015 12:38 pm
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

Re: BMW 745i conversion

Thanks for the reply Simon I will run through what I know to get it clear in my own head, dont take it that I'm trying to instruct. A little bit of background for you, I am a qualified car technician and worked for various manufacturers but not for many years now. I find I have to do a lot of readin...
by v8gas
Tue Apr 28, 2015 11:17 am
Forum: Tell us your Story
Topic: BMW 745i conversion
Replies: 23
Views: 6921

BMW 745i conversion

I am doing my first DIY conversion on a BMW 745i. I have a few questions but will begin with a description of my install. I fitted a 82litre donut tank in the spare wheel well-slight problem is that it will have to be removed when its time to replace the battery. The only alternative was a LPG cyli...