Makeshift Fuel Tank/Can (to check fuel consumption)

Time to test my carb's new main jet - to see this - I am going to check how far Voxy can go on just a liter of fuel. 

To do this as accurately as possible - I will bypass Voxy's gas tank and install a makeshift gas tank that will contain only a liter of fuel. This old thinner can should work fine! At first I thought of using a sturdy plastic bottle but I fear that it might shrink and shrivel. Given the high temperatures in the engine bay (where I will put the can) - better be safe than sorry.

I started by making a hole in the cap big enough for my hose.

This hose is intended to be used for fuel so it's right for this project. It costs around 20 pesos per meter (so cheap). Although I wouldn't recommend using this for the car's fuel system - I think its better to use the a braided hose which is better but costs more.TIP: I've seen an air hose that looks exactly like this so make sure you're getting the one intended to be used with gas/fuel.

Make sure that the hole's edges are not sharp because it could nick the hose.

Be mindful of how much hose goes inside the can - it has to be just the right length to seep every drop of fuel in the can - too short and it won't reach the bottom - too long and the hose might coil upwards. PIP: Cut the end diagonally so it can seep the fuel better.

As you can see - I'm really a fan of epoxies :) Mixed a small amount to bond the hose and the cap - the fuel might splash around and I don't want any of it leaking out. I used Pioneer non-sag epoxy which is gas and chemical resistant :)

Allowed this to dry overnight.

Just to be sure - I placed an old fuel filter in the line. Secured all my connections with some clamps.

Here's the finished product - time to test if it works!

The can fits snugly in this corner of Voxy's engine bay. I made sure that it doesn't rattle around at is not near anything that's very hot. TIP: It would be much better if the can is placed inside the car - as far away from the engine as possible - away from all that heat and possible sparks :)

Plugged the fuel line that goes to the fuel pump with a Philips screwdriver.

And installed my new line to the fuel pump. REMINDER: Always make sure that everything is tight and that no fuel is leaking - messing with your car's fuel lines/system could result to accidental fires. Please be careful - you've been warned :)

The car started right up and I began my test.In order to save fuel - I have to make sure that none of it is wasted. I moved from a 120 to a larger 125  main jet which means that it will allow more fuel to go through. So how is that saving fuel? Using smaller jets somehow chokes the engine and makes it harder for the engine to produce power. The tendency is that driver needs to pump more gas for the engine to go faster. By moving to a 125 jet (the stock jet), the carb works as it should. But always bear in mind that fuel efficiency is not achieved by having the right jets or carb alone - every component has to be in sync and in order - the intake, exhaust, ignition, timing, power transfer to wheel. Even the driving habits affects fuel economy.

It took around 9.5 kilometers (I tried my best to simulate normal driving conditions) before Voxy stalled. An improvement from the 6-7kms/liter I previously had. Not bad. I hope to improve Voxy's fuel consumption in the future but given that I have an A/C system installed - I don't think it will improve by that much :) If you have ideas on how I could do this - I would appreciate it if you could leave a comment.

P.S. Thanks to sir erick and sir aceman (VWCP) for all the help.