My some what fruitless search to find a 4.4 with low milage in my price range has lead me to look at the 4.2 supercharged versions which seem to now out number the 4.4. My lpg installer says they would fit two vaporisers to deal with this engine.

Any one running a 4.2 sc on lpg ?

Hi Dave

Four years ago, when I was thinking of having my 4.4 converted to lpg, my technician had converted a S/C for the owner of Tinley Tech (who supply lpg equipment).

I'm not aware that he had any issues, but if you pm me I can give you my technician's number.

Not had any problems with my 4.4.

Thinking about it for MY 4.2 SC , but not done it yet
AFAIK
you need to make sure that the System you choose will cope with 390 BHP through the rev range
and
you need to guard against valve seat recession by using a Lubing system as well

you have to look in the LPG threads but there there are a couple of members on here who say they have done a 4.2 SC without problems

perhaps time will tell

IIRC JE Engineering offered this for a while but they said even the flashlube type stuff wont save the valve seat recession just decrease it and their install included a head upgrade to get rid of the issue.

http://www.fullfatrr.com/forum/post69000.html

If you install LPG your in it for the long haul to get your money back and IMO its got to be worth spending the money on getting the heads done and then not worrying about flashlube and stuff needing top up. FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

I'm in for the long haul. 2003 4.4 converted at 70,000. Now on 122,000 and engine is fine . Had a flash lube system from day one. My tech has installed on just about everything, inc a bentley with the 4.4 twin turbo. He's a certified installer but the one vehicle he's yet to do is a 4.2 sc.

The previous owner to me converted at 17k miles - I'm now at 180k (replaced the original LPG front end - injectors / vapouriser / ecu etc) around 10k ago as it was failing - no problems with the engine so far.

I would put the LPG on, with flashlube and see how far that will take you !!

PS, not planning it on my 5.0 though  MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

had mine converted almost 2 years ago , converter wasn't the best tbh . Very tidy work but his mapping skills were somewhat lacking.

I have since acquired the software and learned to set up the map on the system myself and have greatly improved the running of it and I've also fitted a lube oil system to ward off valve seat recession.

works well but I have set it up to give a pulse of petrol in addition to lpg when pushing more than 3500rpm to further aid VSR worries and help reducer possible under capacity.

it gives me no issues whatsoever and runs very well indeed.

ebajema wrote:

PS, not planning it on my 5.0 though