LPG technical

[jeffro ra28]

Id like to add my experiences with LPG variation. I can get an extra 130km's on 100 litres of gas by filling up at my mobil servo compared to caltex/united/shell. The next best mileage i get is with bp but its like 10 cents a litre deerer

[celicapain]

yehaar, tis supagas that sells pure propane. that said i got a bad batch last year so no suppliers perfect. still running straight gas on 1ggte, rhc6 turbo, GRA s320 carb, pair of b2converters made 185rwkw with v retarded timing on 17psi. i love the stuff.

[jeffro ra28]

What are b2's? who makes them? Where to get supagas?

[celicapain]

supagas is a chain store in melbourne, they sell welding supplies and also lpg(propane)
B2's are a generic model of lpg converter, they are made by a few companies, in a few different calibrations. i got mine from a factory round the corner that makes them for GRA,

[GasedT18]

I would like 4 of these for xmas.


http://www.vdo.com/products_solution...rain/gasoline/

How long would it take to get a high pressure gas/liquid/cryogenic fitters licence?
Yes it is potentially very dangerous.
Not street legal atm, engineerable (?).

D

[jeffro ra28]

to be a CNG or LPG licensed fitter you need to be a qaulified mechanic and do n additional CNG and LPG course at tafe. Dunno about gas/liquid/cryogenic fitter tho....

[Starfire]

I'm interested in running my 2TG hybrid on gas, but have been unable to find anyone making DCOE style mixer plates.

Does anyone know of any or have any suggestions?

Cheers,
Terry

[IN 05 NT]

To overcome the problem of valve seat recession due to LPG's poor lubricating properties you can install an oil injection bottle. This is something that would have to be modified for use with forced induction engine with manifold boost pressure. As the standard bottle feed oil injection system solely relies on vacum to draw upon the lubrication oil. Anyone have any idea's to resolve this?

you will need a small one way valve, like what you put in the brake booster line for turbo applications. (but will need to be smaller)

we just became a licensed LPG fitting station, but were yet to fit a kit....

[celicapain]

I'm interested in running my 2TG hybrid on gas, but have been unable to find anyone making DCOE style mixer plates.

Does anyone know of any or have any suggestions?

Cheers,
Terry

I think youd be struggling to find mixer rings small enough for a dcoe( webber style right ?) carby duel fuel set up, and setting em up to run well would be a bitchos.
id say youd be better of going for a single mixer, either impco or GRA and using an efi manifiold or plumbing the intake side of your carbs together and strapping a mixer on the end of it. that would also be much easier to tune.

[Starfire]

I think youd be struggling to find mixer rings small enough for a dcoe( webber style right ?) carby duel fuel set up, and setting em up to run well would be a bitchos.
id say youd be better of going for a single mixer, either impco or GRA and using an efi manifiold or plumbing the intake side of your carbs together and strapping a mixer on the end of it. that would also be much easier to tune.

Yeah Weber style.

I intend on retaining the carbies are throttle bodies only, there will be no petrol used if I can help it.

I know that I could use the turbo bonnets I have lying around to go to a larger mixer, but it just wouldnt be as _cool_ as having the quad mixers...

I do know that you can get some really small ones for motorcycles, so 4 of those may be the next best thing, but I would prefer to have two bolt on mixer plates.

Cheers,
Terry

[jeffro ra28]

just make them

[Starfire]

The thought has crossed my mind.

I could probably talk one of the CAD designers at work in to drawing them up for me, and get them prototyped in the manufacturing building.

I'm not sure what the requirements are for a good mixer though. I suppose that I could buy one of an appropriate size and copy it's critical dimensions.

Cheers,
Terry

[stradlater]

Hey Jeffro,

A) Yeah, I did start Performancelpg.com it's gone down hill a little bit lately, but there's now a few guys with decent knowledge on there so it may be worth joining.

GRA carbs don't 'support' boost at all. IE, they won't warrant it. HOwever, my s320 has had 30psi through it, along with the 2 modified B2's (which I now have for sale) and their appropriate steel hats.

I pushed out a conservative 225rwkw with my 2 B2's, a shitty arse line system (can explain better via PM) and my s320 carb on 20psi.

I wouldn't bother with injection just yet as it's not quite up to scratch for boost, however there is a guy on performancelpg who is running a stroked LS1 with twin turbos and vapour injection, it seemed like a fairly significant amount of power, I can't remember specifically.

As a guide, I'm now running:

1uz - GT3540 turbo with 1.06 exhaust housing.
s500 GRA Carb
TRUE triple lines and TRUE triple lock offs
3 Converters, one of them twin lever, with custom built hard hats.

This setup (engine and turbo limited) should support 550rwhp.

The catch for LPG is the flow out of the tank and the resultant line setup.

I can give you a heads up on what's best for that, but via PM. :-)

Happy to help a fellow modder with some LPG info.