p38 lpg conversion diy

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biketeacherdave

biketeacherdave

Well-Known Member
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south east london
Right after spending the last year or so of ownership fixing my RR to a standard I'm happy with including head gaskets n heads the time has come to fit an LPG kit. Iv picked up a full prins kit second hand including a pre drill inlet manifold complete wireing loom required to replace the one on the car where the LPG ecu needs to be cut in, vapouriser , spare wheel tank which looks like new and a few other gubbings.

I will update as and when iv completed each part of the install for the most part it should be almost plug n play. Iv spent a fair while on the search function and found some great stuff.

All iv done so far is clean n spray the inlet manifold next job will be to check out the loom connections where the LPG ecu has been cut in just to make sure its nicley solderd in and heat shrinked before I swop it out
2015-11-04 14.33.33.jpg
 
Its been sitting in my shed for almost x2 years so I had better get it fitted iv some time off next week so mite give it a go, does any one have prins Vsi software they can share ???.

When I bought it I was tolled it should just be plug and play as iv the full engine bay loom with the 2nd hand kit which was removed from a working car but its possible I will need the software to activate it and or carry out diag

Cheerss
 
LPG is part of MOT now. Marty's suggestion re pipe lengths is good. I did one with tortuous pipe routing and you could've had a game of chess waiting for the pickup. I had a stainless exhaust fitted coincidentally and did away with the cats. Food for thought. I'd cover everything, cables pipes and all with split tubing especially from the inlet nozzles through the bananas. I put a secondhand system on a motor and dropped a clanger. The barrier betwixt the water jacket and LPG department in the reducer had decayed which gave me headaches. Take a nozzle out of the injector rail to see if it's been drilled out, it's easy to let the software see a rich burn. You'll get " calibration successful but not optimal". The last thing I can think of is ensure hoses for LPG are used where appropriate and have such stamped on them. Good for you, though.
 
We converted a Thor engine from scratch, new tanks, new Pan valves and eventually a new Zavoli ECU.

Fit twin LPG filters in the feed to the valve banks, Y-piece in the feed out of the vapouriser.

Fitting T-pieces in the water pipes is not the best way of getting heat into the vapouriser, you are better off running the heater feed from the engine straight through to the vapouriser and then to the heater, so that all the water flow goes through, not the amount that trickles through via the T-piece. The vapouriser needs to have big enough flow rates so that the heater feed isn't restricted.

It will need to be inspected and put on the LPG register for insurance purposes.

Peter
 
The vapouriser is the key part to the operation and would really advise a new one. The diaphragm is subject to hot and cold cycles and then its left dry for 2 years wont last that long. Tinely Tech near me will give you some good advise about a new vapouriser. You dont want liquid gas going into those injectors as it would be an expensive mistake Gas has come a long way since that system New injectors and front end for a good system would be around £400, sell the prinz for £150 and you can have a new system with a new loom
 
Thanks guys for all the suggestions I was getting ready to install the front end but paused a moment and phoned my insurance company who have said
My current underwriter doesn't cover LPG converted cars, but I can cancel my insurance mid term and they keep all the money and get a new quote from them but they can't garunte any of there other under writers will cover it either..........


Shame as the prins system I have it pretty decent with a huge vaporiser, vsi 8 ecu, full engine harness and statko tank........will need to rethink options as I'm not giving the insurance company 8 months money........... Just to cancel mid term...

Yes I was going to put the vaporiser in series as it seems the best option I was going to use the throttle body heater pipes as its been by passed at some point so no need to cut into the heater pipes and disturb my O rings, and an over haul kit was in my shopping trolley to as well as a new filter....bugger.

Good call on contacting tinley tect maybe give them a call iv been using the LPG shop online seems my current front end set up on there site is about £900 :eek::eek:
 
So moving this on I have had a long chat with my current insurers who are very good just to try and get an idea of cost to insure once converted........none of their under writers will insure an lpg car so only option would be to cancel existing policy and reinsure with some one else who does

Who is everyone else using then ????
 
mine is with AXA

Adrian Flux cover LPG. Its odd that an underwriter wont touch an LPG, all my insurer needed when it was done originally was a copy of the installation certificate prior to it being registered with DVLA LPG register.

Of course in the course of ownership some owners may lose their certificate of installation and not put it on the register, then you need to take it to an approved installer for inspection
http://www.drivelpg.co.uk/advice-and-information/uklpg-vehicle-register/

click on that link Dave and put in my reg number in the lookup
 
Cheers Adam I will have a look see all I need to do is find a company that says yes I think I did find one when it was time to renew but they excluded driving other cars but said yes to lpg and I'm always jumping in other peoples cars so need that option which I have now as iv just reinsured my rover 75. :rolleyes::rolleyes:
Have software on order and a repair kit for the reducer to as its been sitting in the shed its a good one £350 new so no brained to overhaul it.

This is suppose to be saving me money.........:confused:
 
I'm with Kwik Fit insurance this year. Never had a problem getting insurance.

It's very important these days to get your car on the UKLPG register. Most insurance companies now check it to check your install is safe.

To do this you'll need an inspection from a qualified inspector to put you on the database. Tinley Tech did mine. Cost me £60 I think.
 
pete1987RRC said:
I never had any issues and am not on any register.... least not a lpg register.
Click to expand...

I have you right there Pete after speaking to several insurers today some will cover them some won't the one I'm leaning towards said as long as its a professional installation we cover it if its not we dont..........so I asked what proof did they need as there is no longer any approved UK body for LPG installations.........or installation certificate..........

We just take your word for it that's its been done properly.......result and the yearly quote is also cheaper than my current company I just have to decide if I'm willing to lose almost 8 months cover and £45 cancellation fee on top of maybe purchasing a new front end kit. Nothing wrong with the old one it was removed from a working car just been sat in my shed a couple of years vaporiser service kit is £35 software and lead another 40.
 
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