Thread: Marrelli LPG complete *under the bonnet* kit

Originally Posted by GEK064

Cool - thanks.

Got the kit today, doesn't look bad, just trying to read the instructions for tuning.. Fitting looks quite easy! . Hopefully it will all make sense when I fit it up next Monday.

Day 1, the BA Falcon fitment. My comments to the seller:

I have installed the underbonnet kit today and offer the following observations:

1. As noted before there was no 6mm injection hose, nor was there any 5mm for map sensor connecting. There was 25cm insufficient 12mm hose, luckily I had enough spare from other kits.

2. On connecting the injector cut wiring I had a misfire on 1 cylinder. Either the gas ECU or the harness is faulty. Eventually I worked out the Bank B cyl #5 wiring was at fault (engine #4 cylinder). I swapped over input and output connections to Bank B cyl #8 wires and it seems to work. Luckily I only need 6 cylinders and it runs happily on a random wiring set-up!

3. I tried for 2 hours every possible method to connect my laptop to the gas ECU, I could not get it to connect on any com port. Luckily I have my old laptop with only 3 com ports, one of which is USB1. On the third attempt it worked.

4. On running the gas I noticed the gas pressure display reads a constant 0.86 bar. This does not change for anything. The hose has gas pressure to the map sensor pressure input. The effect is to prevent the gas change-over happening automatically when the gas runs out. I think the MAP sensor may be faulty. Can you supply a replacement?

Tomorrow I will connect the gas cylinder and test drive it. If any other faults occur I will let you know.

Regards

I don't think this kit is very high quality, although the reply I get from the seller will possibly change my mind. The tuning is primitive compared with the Zavoli/Alisei kit I use, granted that is 2011 updated stuff not 2008 like this stuff. Test drive hopefully goes well?

Got My kit from UK today. 4 weeks delivery was as expected. Injectors and converter are so small compared to other systems and this will make fitment in a crowded engine bay (P38) easier. Quality looks great. Will know more when it all gets fitted in a few weeks. So far so good. Anybody got a large tordial LPG tank (~80 L)that fits in a P38 spare wheel well for sale ?

Originally Posted by bee utey

Day 1, the BA Falcon fitment. My comments to the seller:



I don't think this kit is very high quality, although the reply I get from the seller will possibly change my mind. The tuning is primitive compared with the Zavoli/Alisei kit I use, granted that is 2011 updated stuff not 2008 like this stuff. Test drive hopefully goes well?

Day 2, the reply from the seller:

Hidden in the instructions is how to rewire the map sensor so it works.

The missing cylinder is claimed to be an anomaly, he's never seen it. My fault? Dunno. He says he has fitted 1000+ of these kits. I'm not fretting it as I only need 6 cylinders today.

No reply on the missing hose, so if you buy one of these kits be prepared to purchase extra hose.

The test drive went OK, a small power loss but eminently driveable. There is no provision for petrol addition under load but the BA didn't seem to need it.

My rating? probably 7 out of 10, but, hey, it's a cheap way of getting injection on a LR V8. Oh, and the injectors are very quiet.

Bee utey, this Aussie system is worth $750, the Marrelli system is worth $1000 and the zenit system is worth $1500. (all prices are buy it on eBay)....is it a case of you get what you pay for or is it good value compared to the uk stuff?

Originally Posted by GEK064

Bee utey, this Aussie system is worth $750, the Marrelli system is worth $1000 and the zenit system is worth $1500. (all prices are buy it on eBay)....is it a case of you get what you pay for or is it good value compared to the uk stuff?

The higher price kits will come with more brain power, and possibly better quality components. (Oh, and enough hose perhaps.) The $750 Steffanelli kit has enough functionality to work on vehicles without full OBD2. Your P38/D1/D2 engine won't chuck up an engine check light if the mixtures wander more than 10%. They don't really care. So an occasional plug-and tune will be good enough for these. Also you don't get staggered changeover, just BUMP and its over on all cylinders. You definitely feel it.

I would definitely NOT fit one of these to a 2005+ vehicle. I had loads of problems with earlier versions of the Zavoli kits before they went to OBD2 interfaces. The trouble you see is that the local mixture of propane/butane is variable enough to throw out carefully constructed fuel maps. And a brightly lit engine check light freaks out customers.

My conclusion: This kit is excellent value provided nothing goes wrong and you need spares. I have no idea how reliable they are, I'm sure the seller will tell you they are great. I'll get back to you if the BA stops.

Manufacturer's website for further reading:

Stefanelli Group srl - auto gas equipment

Could someone tell me the benefits of and the difference between liquid and gas injection systems? Particularly as applicable to fitting on a Disco 1 3.9i. OBD2and lambda are a mystery too? I am more inclined now to the Marelli system and have found a fitter in cambellfield who will do the job for $1000- ie fit frontend kit, filler, gas line and initial tune. While not that happy, obviously money will change hands and that is the bottom line. But with a full local install quote of $4000 or so, compared to around $1400 for the kit, tank + his $1000 labour, I feel I am somwhat better off financially. I just put a new camshaft, followers, head job in the car, so I have a pretty good mechanical knowledge. A manifold tank on the rear floor seems the easiest tank solution. Is that suitable for which type of injection system? And the fitter said I only need the old non-injection system for my old Disco. But I read on the Forum of misfiring, etc. Any thoughts? It is great to read the Forum and I appreciate all the comments made so far.

Originally Posted by daberu

Could someone tell me the benefits of and the difference between liquid and gas injection systems? Particularly as applicable to fitting on a Disco 1 3.9i. OBD2and lambda are a mystery too? I am more inclined now to the Marelli system and have found a fitter in cambellfield who will do the job for $1000- ie fit frontend kit, filler, gas line and initial tune. While not that happy, obviously money will change hands and that is the bottom line. But with a full local install quote of $4000 or so, compared to around $1400 for the kit, tank + his $1000 labour, I feel I am somwhat better off financially. I just put a new camshaft, followers, head job in the car, so I have a pretty good mechanical knowledge. A manifold tank on the rear floor seems the easiest tank solution. Is that suitable for which type of injection system? And the fitter said I only need the old non-injection system for my old Disco. But I read on the Forum of misfiring, etc. Any thoughts? It is great to read the Forum and I appreciate all the comments made so far.

Look just forget liquid gas injection. It's too complicated and needs a totally new gas tank. A D1 is stoneage (early silicon age?) technology, a well set up mixer system is hard to beat. The Australian D1 hasn't got any self-tuning ability (from oxygen sensors and on board diagnostics,) so ANY gas system will run out of tune. Simple gas mixer systems can easily be retrofitted with an Oxy sensor for self-tuning, vapour gas injection is much harder but still possible.