Post by tursty on Jan 19, 2017 16:49:15 GMT 12
Hi there. My brother and I are building a 76 KE30 corolla with a turbo 7AGE and a fairly scratch built fuel system to support the new heart. The questions I have are around what we have done to the fuel system in the boot specifically. But before asking them, I’ll explain the setup.
Not sure if this is relevant, but the factory fuel tank was located in the boot and is not separated from the rest of the boot by anything. The fuel pump as far as I can remember was also in the boot.
We have removed the factory fuel tank and cut out the boot floor where the spare tyre well was. In place of the wheel well, we have installed a folded and welded alloy box that is bolted all the way around the outside through the floor, and sealed. This drop box is VERY solid so should satisfy the requirements of modifying the boot floor.
We then have an alloy fuel cell in this box, as well as a surge tank, inline fuel filter and two fuel pumps. The drop box has a couple of spill drains through to the ground (but away from the exhaust). The fuel cell is filled from the outside of the car via the factory fuel filler and a large pipe to the top of the cell. The fuel cell vent runs to the factory vent tube and out via the filler cap.
We also have every intention of locating the battery in the boot.
Ill also add a photo at the end so you can see a lot of this for yourselves (keep in mind the filler is now completed and connected to the factory fill location).
Now the questions (these are very similar to those asked by another user regarding surge tank locations so thanks for the extracts/wording).
1. Location of the fuel pumps and their respective wiring
Section 10.4.1 of the hoby car tech manual states:
A low volume vehicle that has a fuel tank located on top of the floor surface, must have the floor and surrounding area in which the fuel tank is located, designed in such a way that any fuel, in the event of a fuel tank leak or rupture: (see Diagrams 10.1 & 10.2)
(a) cannot come into contact with the vehicle’s battery or battery leads; and
(b) will escape to the outside of the vehicle, without draining onto either:
(i) any part of the vehicle’s exhaust system; or
(ii) any part of the vehicle’s electrical system.
When it says “any part of the vehicles electrical system”, does this include the power wires for the fuel pumps, or the signal wire for the fuel level sensor?
2. Battery located in boot alongside this
The above section of the tech manual also states that a fuel spill must not be able to come in contact with the battery and its leads.
If the battery is in the boot, but housed in sealed fuel/acid proof container such as a fabricated alloy box with a sealed lid, and then vented through the floor, the leads contained in a pipe of some sort, will this be sufficient to satisfy this requirement?
3. Are there any other issues you can foresee with this setup we have built?