คำตอบที่ 19
ไปเจอข้อมูลอัตราการใช้แก๊สสำหรับ V6 3000 ครับ
Hello people,
Converted my mg 3.0l paj a month ago and I am not looking back. The engine is a little worn and tired but its doing fine on the gas. I was prepared for 20L/100km consumption on gas but I have been surprised. I am meticulous with my fuel calculations: here are my results so far (based on each fill up) :
1. 16.53L/100km - city 90% --------- 6.04 กม./ลิตร
2. 17L/100km - City 90%----------5.88 กม./ลิตร
3. 19L/100km - 50/50 mixed driving (found out oxy sensor was NOT working....ordered universal one from ebay for $40) --------- 5.26กม./ลิตร
4. 16.9L/100km city 70% + tune up with new sensor--------5.91กม./ลิตร
5. 18.93/100km Towing my 4.6m runabout -----5.28กม./ลิตร
6. 16.72/100km 20%city/80% highway (slightly heavier foot this week)--------- 5.98กม./ลิตร
7. 90% highway - 15.21L/100km (at highway speeds)-----------6.57 กม./ลิตร
8. 90% highway - 14.8L/100km (a little bit of free gearing down hills, taking it easy but still at highway speeds)----------6.76กม./ลิตร
9. 16.7L/100km - 60% city (average style)------5.99 กม./ลิตร
***I have been filling up after doing about 150km-280km per tank...haven't run the tank dry...doing this to get many readings)
I am generally a smooth driver, no fast starts at lights..foot rarely ever past halfway..even during acceleration. i keep revs below 3000rpm...don't drag gears out. I do drive in a fuel saving style. So I guess these results are ok. i am happy with them considering that this is an old motor - 250k. plus its valve guides aren't in the best shape.
Since going on LPG I noticed the following:
1. IMMEDIATE reduction in engine noise...I mean IMMEDIATE..its wierd...sounds SO quiet at idle.
2. engine sounds SO much more smoother
3. oil is CLEAN..porcelin of plugs are black and CLEAN.
4. Slightly less power....not substantial...easy to get used to. TOwed my boat with ease..crusied at 100km hr easily in 5th gear...boat package with mates weighed roughly about 1200kg...I used petrol upon acceleration on ramp merging with Hwy...but didin't really have to...just wanted to get there a little faster.
I bit the bullet with this one and just went for the conversion ($2400)..stuff all this BS fear talk. I am mechanical by nature and if it were to go sorry..I'd reco the engine myself. However I did ask a few things for the conversion. I wanted a computerised system with a learning ability that could go to close loop. I ended up getting an AEB processor which uses a stepper motor to control LPG delivery, and recieves input form the oxy sensor as a baseline. THUS air fuel ratios are predetermined for a given load point. Couple that with the detonation supressing ability of higer octane...it makes fora pretty safe setup. The unit starts on petrol for 2 secs before switching to gas...the the computer does the rest. This processor has a self learnign capability much like OEM computers, its pretty efficient. The car doesn't even ping under heavy load...I am talking about 5th gear going at a measley 60kmhr foot flat to the floor up a steep hill to induce load (I only did this to test it)......NO PINGING! ....if it were petrol ..it would be pinging like mad. It is also mechanically set to run pretty lean during idle or under 1000rpm to safe fuel. I also customised my tank to be places on abracket over the left wheel archs in the back..saves lots of boot room.
Older LPG systems are primitive ...beig carbies and all...these Processor controlled units...whe programmed well...are excellent. So far I am happy. I know many of you are tak\lking about valve seat recession and all that. But there are plenty of 3.0pajs thatare still chugging with no probs. There are so many theories about this but few examples. I have asked many many mechaics about this and ones that I trust told me not to convert 2.4l hiluxes as they do have a valve recession prob...but these old paj 3.0l are ok...just do some precautionary things like have a decent cooling system....these motors run hot, so clean out your radiator professionally and make sure your thermostat is working properly. Ther ehas been NO increase in running temp since the change to LPG...even under load with boat. Never went past a third of the gauge reading. I am in QLD by the way and it was a reasonably hot day.
There you have it people. My account so far. I am happy about it. At the moment with current LPG prices its like driving a vt commodore when petrol used to be 80cents...thats what I worked it out to be like for those who don't undersatnd the maths. AND its better than say a hyundai excel running with current petrol prices!
