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FAQ

Question: What are In-Tank Retrofit Fuel Modules?
Answer: A retrofit fuel module is a device that allows you to convert a vehicle's fuel system to an in-tank electronic fuel pump hanger solution. Retrofit fuel modules can be used to replace an external fuel pump with an internal one, which can help eliminate issues like vapor lock and cavitation. Alternatively, if a vehicle must retain use of a mechanical fuel pump or external electric fuel pump in conjunction with one of our poly tanks, a Bolt In Pick Up Assembly (BIPUA) would be used instead.

Question: Why don't your poly tanks include connections for the factory fuel and vent hoses?

Answer: Our poly tank is designed primarily for aftermarket surface mounted in-tank fuel components and modules. These components include ports or barbs for connecting fuel hoses and vent hoses. If an installation requires additional hose connections, a bulkhead fitting with nylon seals can be used.

Question: How does an external or mechanical fuel pump connect to a poly tank?
Answer: With a "BOLT IN PICK UP ASSEMBLY" (BUPUA). This in-tank solution includes ports for connecting fuel supply, fuel return, and vent hoses from the vehicle. We recommend a Tanks Inc Bolt In Pickup Assembly (part number PTA-G). To complete this installation the following components will also be required:
a) Quantity of one (1) Tanks Inc 6-Hole Nitrile Rubber Gasket (part number 3G-N)
b) Quantity of one (1) Tanks Inc 6-hole Split Ring (part number 3TR)
c) Quantity of six (6) 10-32 threaded screws 3/4 inch long

Question: What other installation accessories are required to secure an in-tank fuel pump or sender on the poly tank?
Answer: Manufacturers of in-tank retrofit fuel tank components typically include installation instructions with their products or online links to view directions. If they don't, best practices are always suggested. Most products will require a nitrile rubber or viton gasket to be used instead of a cork gasket with a poly tank, be sure to use the correct material. Additionally, in-tank fuel pump hangers and senders may also require an internal steel C-shaped mounting ring (pre-threaded) or a flat steel shim to be used for proper compression on the internal poly tank wall. Be sure to check the installation directions of those products prior to purchase or contact us so that we may suggest a solution.

Question: Do the poly fuel tanks include an internal baffle?
Answer: Our poly tanks are designed with a large baffle wall to reduce side-to-side fuel slosh. During development we evaluate the location and size of the baffle wall to allow for internal fuel component installation space and overall impact on external features.

Question: Can the original Datsun S30 fuel gauge sending unit be used with your poly tank?
Answer: No, the original factory sending unit will not secure and seal to the poly tank. An aftermarket surface mount fuel sender that includes hardware, a gasket, and a threaded steel C-ring will have to be used instead. We offer a custom designed fuel sender that can be wired into the existing fuel gauge harness under the hatch floor and operate the factory fuel gauge or any impedance (ohms) operated universally programmable fuel gauge.

Question: What fuel gauge and sender options can be used with a poly tank?
Answer:
Option #1 is to retain the original factory fuel gauge and pair it with our 10.0" long custom fuel sender.
Option #2 is to replace the factory fuel gauge with an electronically programmable fuel gauge that has a working impedance range of 0-300 ohms and pair it with our 10.0" long custom fuel sender. 
Option #3 is to replace the factory fuel gauge with an aftermarket gauge (offered in a variety of impedance ranges) and match that impedance range to a 10.0" long tube, reed, or remote-sensing style fuel sender of your choice.

Question: Which in-tank retrofit fuel pump hangers do you recommend?
Answer: Depending on the fuel system requirements of the engine, your budget, and ease of installation you desire, there can be many options to choose from. If you don't know where to start, reach out to us via the CONTACT PAGE and we can assist you. Please include the engine designation, fuel system type, engine modifications, and any changes which you may make in the future to your vehicle so that we can address your options. Popular pump hanger brands include: Holley, Aeromotive, RCI, and Tanks Inc.