tee
Part of things
Posts: 703
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Mar 12, 2012 13:01:15 GMT
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Dudeos, wanted some advice on my 1970's silver shadow roller if you may. 6.8, I take it to work everyday, 9mpg. yep. Fun times. So has anyone got a big engined car running on gas? Mate of mine had a 4.4 Range Rover gas converted and he wasn't too happy with the results.
Also if anyone has personal recommendation of someone in east mids area who fits and supplies that would be great
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T
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Mar 12, 2012 13:02:59 GMT
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Lots of experience, mostly great. Negatives have come through poorly installed, maintained or cheap and cheerless systems.
At 9mpg I'd say go for it (and quickly!).
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Clement
Europe
ambitious but rubbish
Posts: 2,095
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Mar 12, 2012 13:07:18 GMT
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I have no idea but I'd love to see pics of the car, or even a thread on it
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Mar 12, 2012 13:34:24 GMT
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Since I took my LPG vehicle off the road before winter I've noticed a pretty big price increase. was 69p before christmas seems to be 85-90p now
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1970 Porsche 911E 2002 Porsche Boxster S 2002 Peugeot Partner 1.9sdi
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Mar 12, 2012 15:49:29 GMT
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Both my rover 220 Turbo and my SAAB 2.3 Turbo are LPG converted and I've had no problems with them, although they are modern LPG injection systems. Your Roller would need to use the simpler mixer type system.
I've had a good few LPG cars and as Percy has already said how well the car runs is completely down to the quality and set up of the LPG system.
I can reccomend Autogas 2000 in Thirsk, but thats a bit far north for you.
The cheapest way to get LPG is to get an account with someone like Calor. They have a pump around the back of the shop at the place I go and it's still only 74 per litre. Plus I only have to clear the account at the end of every month.
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1989 Saab 900i Convertible 1993 Rover 416 GSi
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Mar 12, 2012 20:16:59 GMT
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C'mon, you can't drop into conversation that your daily driver is a 70's Rolls Royce and then not furnish us with pictures to salivate over...
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10mpg
Club Retro Rides Member
Posts: 4,253
Club RR Member Number: 204
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To LPG or not...10mpg
@10mpg
Club Retro Rides Member 204
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Mar 12, 2012 20:55:11 GMT
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Yes do it, I've done plenty of conversions both proffesionally and for my self, never had a problem, any of the major brands (almost all Italian) are fine very little to choose between them, Bigas is a nice compromise between cost and quality, cheap rebuild kits for the injectors are a must, they will need doing every so often, don't by one with banked injectors as often you have to buy a whole bank when one fails and they ain't cheap, individual ones fitted to a rail are fine and pretty much the norm now.
FWIW you can run a carbed motor on gas injection, either get one with the standalone management such as the Romano RIS an RIS-N (getting a bit long in the tooth now probably only find one secondhand) or run aftermarket standalone ecu and a dummy load for the injector circuit, if you don't actually want petrol injectors, yeah it's a lot of hassle, but perfectly possible, RIS systems if you can find one are no harder to fit than any other system so worth looking out for if that's the plan, I ran one for years absolutely fine..
99.% of problems are from installers who cant do the job properly or users who cant maintain them properly, lpg systems need tuning and servicing like anything else, esp mixer ring systems, who would do 50k on a car fitted with SU's and not tweak the carbs? change the filters every year and check the mixture and it''l be fine almost indefinitly..
Also LPG cars will not tolerate a weak ignition system, top quality new leads high power coil and decent plugs are essential, many owners wont fork out for this and have problems as a result, you pay your money you take your choice..
I would say my 4.6 Range Rover runs quicker smoother and sweeter on gas than petrol...
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Last Edit: Mar 12, 2012 20:58:58 GMT by 10mpg
The Internet, like all tools, if used improperly, can make a complete bo**cks of even the simplest jobs...
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Mar 12, 2012 21:24:23 GMT
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What 10mpg said ^^^ sooner you get it done the sooner it will pay for itself. We had LPG vehicles since the early 90's, only problems have been caused by bad/inappropiate installations. A sensible tip especially at 2mile/ litre is to fit the biggest tank you possibly can so you can still have a decent range, there's nothing worse than having to plan your route around gas stops. Its possible to fit multiple tanks to this end. Avoid motorway LPG if possible its always the dearest you can find. If you are doing serious milage then I would look at getting your own bulk tank installed to (hopefully) get a better price for your gas. Not exactly East Mids but Dave Crofts at Barrow Hill, Derbyshire are very helpfull and know their stuff + they like interesting vehicles and they had the cheapest gas for miles around last time I was in.
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Last Edit: Mar 12, 2012 22:09:38 GMT by dodgerover
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my F350 ran better on gas than petrol, my 302 V8 mk3 runs lpg (4 bbl holley 600 carb) just has a flat spot when setting off from standstill??? otherwise great will cruise at well over the ton in 5th.
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theres more to life than mpg & to much power is just enough.
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tee
Part of things
Posts: 703
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Mar 13, 2012 20:47:43 GMT
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Thanks a bunch dudes, I'll post pics tomorrow, installation is obviously key, just need someone who knows what they're doing now around east mids area. Approximately what increase % wise do you think I'd get from gas conversion
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T
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10mpg
Club Retro Rides Member
Posts: 4,253
Club RR Member Number: 204
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To LPG or not...10mpg
@10mpg
Club Retro Rides Member 204
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Depends on what install you go for, amixer ring system might lose 20% economy so if your doing around 10 mpg on dino juice youd get around 8mpg on gas, lpg is approximately 75p a litre where i am, no idea what the price of petrol is but I'm guessing just over £1.30? so you'd be doing the equivalent of around mid/high teens mpg
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The Internet, like all tools, if used improperly, can make a complete bo**cks of even the simplest jobs...
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Sorry for the hijack, don't think my question requires a new thread. How well do side valves/flatheads run on LPG? I'm thinking about the desoto, I'm going to have to save just to run it to a show :/ getting 8-10mpg on a run, about 6 on the commute to work (hence I can't really afford to use it much )
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Remember the days when sex was safe and motorsport was dangerous. Vintage bling always attracts pussy.
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is it unleaded safe? Probably... how is the compression?
There is no valve lubrication with LPG and the gas likes a fairly high compression motor.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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10mpg
Club Retro Rides Member
Posts: 4,253
Club RR Member Number: 204
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To LPG or not...10mpg
@10mpg
Club Retro Rides Member 204
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Mar 15, 2012 11:00:53 GMT
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It'll run fine, the valve seats will be huge on a old yank sidevalve, it not going to be much of a revver either so i can see you having any problems, hundered of sidevalve generators and forklifts run on lpg day in day out, the CR only really concerns people chasing bhp, with something like that i'd be surprised if even notice the difference between gas and petrol..
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The Internet, like all tools, if used improperly, can make a complete bo**cks of even the simplest jobs...
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Mar 15, 2012 16:54:55 GMT
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Cheers guys. I feel a plan coming on...
I'm guessing it's quite easy to upgrade from a straight 6 to a V8? Both carb'd. 6 now, V8 in the future.
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Remember the days when sex was safe and motorsport was dangerous. Vintage bling always attracts pussy.
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Mar 15, 2012 18:57:48 GMT
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You may need to upgrade the evaporator(?) when you go to the 8.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Mar 15, 2012 19:37:30 GMT
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lpg is great put my old bmw 325 on it and cudnt tell the difference in power, fitted an open loop system cost me about £100 for the bits and a couple of light days fitting, bought a wide band lambda and set it up myself, never had any backfire issues and it did same mpg as on petrol, infact it ran smoother on lpg.
going to fit it to my next petrol car too.
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Last Edit: Mar 15, 2012 19:38:18 GMT by damageandy
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10mpg
Club Retro Rides Member
Posts: 4,253
Club RR Member Number: 204
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To LPG or not...10mpg
@10mpg
Club Retro Rides Member 204
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Mar 15, 2012 23:48:04 GMT
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The Internet, like all tools, if used improperly, can make a complete bo**cks of even the simplest jobs...
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RPI do a lovely looking piece which looks like a billet throttle body or perimeter fogger plate for a 4 barrel.
My red olds appears to have Impco system and I've been recommended that this is the shizzle for big capacity stuff.
If you're talking a mild 318 then you're not talking a lot of horses and shouldn't need anything too fancy. A strong 383 and you may need something more manly.
My understanding is its more BHP related than capacity - so you'd need a "bigger" kit on a 350 bhp 2.0 turbo 4 than you would on a 200 bhp 5.2 V8
My plan for the '81 Buick is a good LPG system on a 350 V8. Looking to make 325 BHP with about 9.75:1 CR. Crisp, but not rough. Recomendations welcome. As said I was told Impco was the way to go on the LPG Forum
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Last Edit: Mar 16, 2012 9:13:50 GMT by akku
1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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ChasR
RR Helper
motivation
Posts: 10,244
Club RR Member Number: 170
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To LPG or not...ChasR
@chasr
Club Retro Rides Member 170
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Mar 16, 2012 10:05:14 GMT
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LPG for sure! I have been drving LPG cars for years now . As for advice 10MPG has pretty much hit the nail on the head. I would not get too hung up on the brand (as long as it is not too rubbish), but look at the installation. As an example my old daily Mondeo V6 had a Landi Renzo system on it. Thanks to the ineptitude of the people who converted it, I ended up changing almost everything under the bonnet (engine; Heads were scrap/overheated), electrical issues, coolant pipes, vapouriser rebuild). I said that I would never go back to an LPG car after that. On the other hand, my other 2 Mondeos (on LPG) have been great. The first one we converted went on to do a crazy amount of miles with nothing required bar the regular services. Both were on so called inferior Zavoli systems. One thing to bear in mind are the price increases. Bar maybe a handful of suppliers selling LPG at 75p/litre the vast majority are charging over 80p, making a derv look like a cheaper prospect.
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