LPG Questions

Hi all,

Three questions for when I finally get my P38, if you can help with the answers please

Which LPG system would you recommend ?

How much would it cost?

Do you know of a good installer in or near Berkshire?

Thank's

Fred

hiya fred , as far as an lpg conversion goes it has to be multipoint , forget single point mate its just not up to it on a p38a ( some may disagree ) but you need a system that will communicate with the management system on your car , and not confuse it as a single point will , plus you get better performance and mpg.
as far as cost is concerned not sure tbh my car when i bought it already had single point fitted and it was crap , so i bought a under bonnet multipoint kit from a company called tinley tech and fitted it myself , an easy enough job , and no real problems , i cant praise tinley tech enough for the help and support they offer , the cost was around £850.00 that included all the software and leads to program the system using a laptop .
as for anyone in your area sorry mate cant help , im up in lancashire .
as for having it fitted professionally be careful I've seen some really crappy jobs done by so called professionals , im certain someone on the site can recommend a good local company to you though .
i would expect you to be paying in the region of £2000.00 -£2500.00 for a professional job though , why not buy one already done ?
rick.

Sorry to hi-jack the thread.

I get my P38 4.0L on Tuesday. I trust the garage I use to convert it to LPG the only problems I have are where to buy the kits, I've tried searching Google and I always seam to get sent back to ebay. Is this the only places to buy the kit? and the garage I use is not an approved installer so how will that work with my insurer do you get the instilation independently inspected?

Is this a good deal and what I'm looking for?

LPG conversion kit Range Rover P38 4.0/4.6 Gems on eBay, also, Range Rover, Car Parts, Cars, Parts Vehicles (end time 07-Apr-08 20:26:15 BST)

Thanks

John

There are four types of LPG conversion:-

Single point gas injection (open loop)
This is an early type of gas system that is used on vehicles that have no catalytic converter or oxygen sensor in the exhaust system. Open loop means there is no electronic control. This system is only suitable for carburettor and early fuel injection vehicles. Drawbacks include power loss and risk of back fire through the air inlet system, caused by the fuel being mixed in with the air resulting in a manifold full of explosive gas air mixture, and in some cases this backfire can cause damage to both intake manifolds and air boxes. This system is only suitable for carburettor and early fuel injection vehicles.

Single point gas injection (closed loop)
This type of system is basically the same as above but is controlled by an electronic ECU feedback system that takes its readings from the oxygen sensor in the exhaust and the T P S (Throttle Position Sensor). Although it is huge improvement on the open loop system it still suffers from the same drawbacks but emissions and fuel economy are significantly improved. This system is suitable for most fuel injected engines with catalytic converters.

Multipoint gas injection
This type of system is suitable for the vast majority of vehicles and offers superb performance and reliability coupled with none of the drawbacks of the single point injection systems and is definitely one of the systems that you should consider. These system comes as a vehicle specific kit and uses a gas control system programmed with a fuel map for that vehicle and no other. This system is suitable for most fuel injected engines with catalytic converters.

Sequential gas injection
This state-of-the-art gas fuel injection system is the best way to make newer vehicles with complex engine management systems run correctly on gas with none of the drawbacks of the single point injection systems and is definitely one of the systems that you should consider. This system can be fitted to most fuel injected vehicles with a catalytic converter. The system is similar to the to the multi point above but instead of injecting fuel simultaneously to all the cylinders, it only fuels the cylinder that requires it. The gas computer takes the readings it needs to run the gas injection, from the petrol injection system, the vehicle always thinks that it is running on petrol hence any deviation in fuel mixture is compensated for by the original petrol management system, and the signal sent to the original petrol injectors is intercepted and used to fire the gas injectors via the gas computer. Performance and driving characteristics are almost identical to petrol. This system is suitable for most fuel injected engines with catalytic converters.

With that in mind, the best system is Sequential by far! Stay well clear of Single Point systems full stop as they risk damage to air intake system and air flow meter and tend to backfire.

Ensure you get it fitted by a certified garage/installer. You need a certificate to prove it was installed correctly.

Its not going to be cheap.....£2000 odd.....but you will be paying less road tax and cheaper fuel bills, so in the end it will be cheaper to run and better for the environment than a Toyota Prius.

Great information, thank you all very much.
Fred

Anyone had dealings with this supplier ?

Tinley Tech LPG Conversions - LPG conversion kits, LPG advice, LPG parts

redrenger89 said:

Anyone had dealings with this supplier ?

Tinley Tech LPG Conversions - LPG conversion kits, LPG advice, LPG parts

Click to expand...

hiya mate , i bought my under bonnet sequential upgrade kit from these guys and i cant praise them enough , brilliant service , advice , really helpful .
rick.

I had sequential fitted 2 years ago and it is brilliant the garage I used and still do is in Slough and he is the best in the area a proper gas expert cost me 2300 all in with doughnut tank. He will also give you an installation certificate which you must have or your insurance will be invalid unless you have it all checked out by an independent the guy who runs it is called Barry Porter give him a call and say Sandy Todd told you to call 01753 692386 cant recommend him enough for gas good luck

my insurance company didnt want to know about a certificate , they arn`t worth the paper they are written on anyway .
my original single point system had a certificate and the installation looked like it had been done by a tea lad in his spare time , the company that did the original installation is a very well know company as well !!!!!!!!!! .
rick.

Thank's for your help and advice.
Slough is a lot closer so I see what they have to say first.
Tinley Tech seem nice guy's though.
Is the doughnut tank better than the skuttle tanks under the wheel arches ?
As these would leave the wheel where it should be. I have a wheelchair to fit in the boot so the room is useful.

Fred