Gas Conversion for a Type 4 Engine

Brewmaster · Gas Conversion for a Type 4 Engine

Just picked up Wilfred our 74 SC Ute after being away at Geoff's getting his gas conversion.

All I can say is ......"Oh my God"........ the old dog is full of gas and suddenly has a spring in his step and speed to burn!.........

To say we are estatic would be an understatement and my 'kruise' along the coast road from Noosa to Caloundra turned into a highway run which I thoroughly enjoyed at errrrr...... 120 km without noticing the speedo getting there. ..... or when I had to pass some plastic modern vehicles (up to 140km)

Here is what it looks like....

Left side of engine showing oil filter, plate and the Converter with the air filter of the Inpco Gas Carby on a 32/36 mm throtle base.

Right hand side of the engine

Cut in the wall between the engine and the gas tank

72/75l gas tank

Brewmaster · Geoff's Mud Map to the conversion

Here is a diagram Geoff drew to explain what happens with a gas conversion.... a simple mud map for those who have yet to come across a gas conversion for an air cooled engine.

As you can see the gas comes in the filler hose and sits in the tank as a liquid.

That liquid gas then goes into the Converter where the liquid gas changes state by being turned into a gaseous state.

Notice the hot oil hose bringing in hot oil and the hose bring ing the cool oil back out.

The gas is then pumped into the Manifold which is a tuned lengthprogressive Plenum style with an Impico 300a gas Carby on a 32/36 throtle base.

Notice that there is twin cone section that has a valve which closes off and allows any gas to bounce back (reversion) and be matched with more incoming gas. Through accoustic tuning Geogg has been able to turn reversion into inlet pressure and the end result is that it produces more torque.

I aplogise if I have not got some things quite as Geoff explained them to me but I am trying to post what he said. I'm a teacher..... not a listener........ :l

Brewmaster · Geoff's Mud Map to the conversion

Here is a diagram Geoff drew to explain what happens with a gas conversion.... a simple mud map for those who have yet to come across a gas conversion for an air cooled engine.

As you can see the gas comes in the filler hose and sits in the tank as a liquid.

That liquid gas then goes into the Converter where the liquid gas changes state by being turned into a gaseous state.

Notice the hot oil hose bringing in hot oil and the hose bring ing the cool oil back out.

The gas is then pumped into the Manifold which is a tuned lengthprogressive Plenum style with an Impico 300a gas Carby on a 32/36 throtle base.

Notice that there is twin cone section that has a valve which closes off and allows any gas to bounce back (reversion) and be matched with more incoming gas. Through accoustic tuning Geogg has been able to turn reversion into inlet pressure and the end result is that it produces more torque.

I aplogise if I have not got some things quite as Geoff explained them to me but I am trying to post what he said. I'm a teacher..... not a listener........ :l

Brewmaster · What work has been done to the engine

What work was done on Wilfred's engine? ...... to get him right for the conversion to gas.......

Many people have asked me what we were having done to Wilfred's engine for the gas conversion.

Well that is like opening a can of worms as each and every engine will be different and the costs reflect this.

Geoff found some things did not need much work in some areas but others might have to fork out a lot more to fix before the gas conversion commences.

Here is a list of things that Geoff had to do to prepare the old dog for some gas....

Just before I left Geoff showed me pics he took of Wilfred's engine being taken apart ready to add all nis new bits and tits .... Surprised

..... can't wait for him to burn me a disc and mail it down to me to post on the forums.

Brewmaster · FillerInlet and Tank section of the diagram

Some more pics to go with Geoff's diagram

First of all there is the filler inlet. Instead of cutting another hole like some dodgy gas fitters do we used the same inlet as the petrol tank. Yes we removed the petrol tank ........ before you ask.

Geoff's Diagram ..... section on the filler and gas tank

Filler inlet in the same place as the old petrol tank

Gas tank 72/75 litres

Here is the safety mechanisms on the gas tank behind the magic box

Some people may ask why the tank is sitting a bit forward of the missing fire wall. Well when Geoff was fitting the tank he found a patch of rust which we are addressing as part of Wilfred's resto ..... hence the slightly forward stance at this moment in time.

Brewmaster · Tank and Converter section

Here is the section where the liquid gas in piped to the converter where it meets hot oil and converts the liquid fuel into a gaseous state.

Geoff's diagram section

gas converter with oil filter plate and ingoing (hot) and outgoing (cold) hoses.

Coverter with incoming hot oil hose and outgoing cool oil hose.

Brewmaster · Gas heads towards the manifold

Here is the next stage where the transformed liquid has been converted into a gas and heads towards the progressive Plenum style tuned length manifold

Here is the converter feeding into the manifold

Diddlie

Wow all sounds great, no problems like kyra had when flicking over to gas etc etc??

Wonder if anyone in WA has had a kombi gas conversion yet

Brewmaster · Manifold and INpico 300a gas carby

Here is the manifold with its tuned length progressive Plenum style manifold. It has a Inpico 300a gas carby on 32/36 throtle base

[IMG]http://i282.photobucket.com/albums/kk245/komiutedriver/Wilfred%202008/DSC04296

Brewmaster · Another look at the converter

Here is the converter photographed upsidedown so you can read it.

In Winter Geoff says the button in the middle can be primed to help start the engine on a cold morning...... as this is a common problem with some gas conversions.

heretic

No problem switching Di as it is dedicated gas.
Gets rid of the carbs and has a free flowing inlet manifold instead. Although most of the power increase is due to the engine hving a few 'improvements' Alex also found his sweet cruising speed increased significantly.
I think Kyras problems were due to a faulty part and is now sorted.

The Dog has certainly got more grunt. Was sorely tempted to do a few drifts in the freshly plowed cane fields that surround Geoff's place.
I have an identical engine sitting at my place and its tempting to put it in Pauls[my son] bus but Im not prepared to loose it.
cheers
col

Gas Conversion for a Type 4 Engine

Geoff's Mud Map to the conversion

Geoff's Mud Map to the conversion

What work has been done to the engine

FillerInlet and Tank section of the diagram

Tank and Converter section

Gas heads towards the manifold

Manifold and INpico 300a gas carby

Another look at the converter