Excuse me for the delayed reply. Not sure where your gas tank is, so I cannot answer that question. I like Waynes approach to stay above of the frame. It is less complicated and does not compromise the design. Drawback is either a small fuel bin or a high gasifier.
The Volvo has a 2.3 liter engine. It is low torque and even lower by using a camshaft of a turbo engine. It has less overlap of the cams. A Volvo 240 is nicknamed “brick”, so it catches wind anyway… The gasifier will add to the drag, but it’s weight seems to me more of a problem, certainly when you are surrounded by hills.
You are right on the cooling. I took care of the internal leaks and modified the air preheat. Gas temperature is lower now. Dew point will be somewhere between end of the precooler and early stage of the filter. The cooler not being in direct wind does not help much either.
I also took care of a new, bigger vacuum controller and placed it so that it is not affected by braking or bumping. Works well. Driving without controller askes for frequent manual adjustments and a soft right foot.
I added gas reheating in order to keep the mixer and intake manifold dry. It is a simple tube in tube heat exchanger. Some of the exhaust gas of the left hand exhaust pipe is bypassed to the reheater.
Now I’m testdriving, tweaking and making small changes. Wet filter does what I expected: the condensate after the filter is clear. Which does not mean the gas is ultimately clean. Dry carbon dust can be found after the throttle/mixing valves. This powder can only be prevented by dry filtering. But that is a choice between ultimate filtration by sensitive materials or less filtering by means of fool proof material. The gas is absolutely tar free. Not even an oily tang on the filter/cooler condensate. No smelly black fingers this time.
Fuel consumption seems about double of the Volvo, which makes sense, because on dino it also uses the double amount. On the Volvo I can go as low as .65 pounds to the mile on long distances and 1 pound on short tracks and city traffic.
Pics will follow soon. I am repainting the car for now. The sound of the car is wonderful. On LPG or gas the Cherry Bomb mufflers sound harsh, but on woodgas the noise is softened, but still dark. It even pleases females…