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Carb to EFI conversions have become increasingly popular over the last few years with advancement in technology. These things literally self tune themselves, and that is COOL!
EFI Conversion Using Holley Sniper EFI and Aeromotive Stealth Fuel Tank PART 1: In this video we introduce our killer Survivor Nova, talk about our goals, and dive into the project and get our hands dirty!
Because we did not have first hand familiarity with the Holley Sniper (or these throttle body bolt on kits in general) we thought it would be a good idea to pick up this bone stock 1972 Nova featuring a SBC 350 cubic inch backed by a Turbo 350 trans. It runs great, it looks bitchin and we will love to drive it when it is done (assuming everything goes well). The first step to adding this Holley Sniper EFI system is to get the fuel system up to par to deliver higher fuel (55-65psi) pressure as required by the EFI system, so we ordered an Aeromotive Stealth 2 Drop In Tank featuring a 340 in tank fuel pump and built in fuel level sensor to connect to factory gauges. This pump and tank will also give us some room to grow should we ever add a bunch of power to the Nova, or do an LS9 swap down the road, cough cough.
The Stealth 2 Tank we used was a direct bolt in, which made things super easy! We ran Fragola 6AN Black Nylon Braided fuel line to the front of the car. If you are unfamiliar with EFI systems, the fuel system on this car is as simple as connecting power wires (see below) and running a feed line and return line directly to the throttle body.
Fragola line is rated for gasoline as well as methanol and ethanol, we suggest this line to all of our customers as it is made in the USA and very high quality hose at a great price. Click here to check this out: https://www.motionraceworks.com/products/fragola-premium-black-nylon-race-hose-6an-by-the-foot
To checkout all of Aeromotive's offerings with Stealth 2 Fuel Swap Tanks, check out this link:
When wiring a fuel pump, we always suggest using a relay (as well as many other electronics). Most wires from EFI systems meant to power fuel pumps are actually only meant to "trigger" a relay, not to be the main feed. Improper wire size (and length) can limit pump capabilities, but also damage the electric motor. https://www.motionraceworks.com/products/magnafuel-mp-1025-single-fuel-pump-relay
The relay we commonly use is this Magnafuel MP-1025, it has the wires all coming out of it and is very inexpensive and easy to use. For an Aeromotive 340 pump this wiring is more than adequate. Click this link to check it out on our website, it is under $30.
To learn what wires need to be connected where with this simple MP-1025 Magnafuel Relay, click this link. https://cdn.shopify.com/s/files/1/0043/6807/2822/files/72618239_528932534562803_7539663724890554368_n.jpg?19281
Can't find a swap tank for your setup? Check out the Walbro 255 fuel pump. This pump is good to around 500 rwhp on naturally aspirated gasoline engines. It works great, it is slightly louder as it is not submerged in the tank, however.
We hope this video series makes things crystal clear on how easy all of this technology makes EFI swapping an old carb engine (not that there is anything wrong with carbs). Please check out other videos in the series for the full build!
If you have any questions on what is needed for your goals or setup, please feel free to give us a holler. We are happy to help and consult, and side note we love talking about hot rods!
Special shoutout to our friends at Build Tune Race for dropping in town and helping us with the build and to put this video together!
Follow them here: https://www.youtube.com/buildtunerace