If you read the last blog post, you'll recognize the Cobra. This time around, we decided to wake up the all original but otherwise low mile 302 HO. The first order of business was deciding wether to stick with the stock fuel injection, and just have it tuned, or swap it out completely. The customer wanted a more retro look, as he tended to avoid opening the hood at car shows, as the stock setup wasn't much to look at, and kind of looked out of place in a Cobra. But he also wanted to maintain the ease of use and reliability offered by fuel injection. Holley's Sniper Injection fit the bill perfectly. Modern EFI disguised like an old carburetor at an affordable price. The first order of business on the performance side was to remove the stock intake manifold, valve covers, camshaft, and valve springs. A Ford Racing Camshaft with .512/.512 lift was installed, a significant gain over the stock specs of .444/.444. Next, Crane beehive valve springs and retainers were installed to handle the now increased valve lift. Then, a polished Weiand Street Warrior dual plane intake was installed in preparation for the new fuel injection setup. in the process of installing the intake, the factory EGR crossover pipe on the cylinder heads was deleted, along with the smog pump. A smog pump delete Pulley was installed in its place. Next, the factory wiring harness was pared down to only include the wires necessary for the gauges and the new injection. new -6AN fuel lines were fabricated and connected to the stock fuel lines on the frame rail, a fuel pressure test verified that the stock fuel pump was more than adequate for the Sniper injection. After a not insignificant amount wiring; including tapping into the stock electric fan relays so the sniper can control them, and some initial tuning on Holley's free Sniper tuning software, the car fired up immediately and settled into a nice idle, with a noticeable rumble now thanks to the new cam. The first and only test drive before fresh snow fall consisted of mild driving and tuning for the first half hour, then a couple pulls that verified a significant increase in acceleration, and a now noticeable lack in traction through the first two gears. The throttle response is quick and crisp, and it ran well under all circumstances. Once the snow melts of again, it will receive a bit more tuning, then a return to its owner.
If you're interested in replacing a Carburetor with fuel injection while maintaining the stock appearance, feel free to send an email and I can answer any questions you might have.