7.3L Ford F-250 Super Duty Power Stroke - Powering Up with Propane

Admit it. There are times when you wish you had a little more power. Whether you tow with your diesel, race it, or use it as a daily driver, we bet you've had some crazy idea like wishing you could just flip a switch and get an instant boost in power. Well, propane injection might be what you're looking for.STC Performance offers a propane kit that can give you an instant 60-80hp increase and slightly better fuel economy. We went to STC while its mechanics were putting a propane kit on a 7.3L Ford Power Stroke to better understand how a propane kit works and how it's installed. The truck had already been upgraded with a ball-bearing turbo, an exhaust, an intake, and a mild programmer. The owner wanted more power-a kind he could turn on and off-so he decided to go with a propane kit for when he needed that extra boost in performance.

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Driving Impressions
To demonstrate the potential of propane, the guys at STC took us for a ride around the block in their propane-equipped shop truck. There's actually a noticeable increase in acceleration once the system is activated, and it also seems to make for a smoother-accelerating vehicle. If you've ever ridden in a truck with nitrous, this propane system feels like a mild nitrous kit, only you don't spend $5 every time you use it-plus, you can use it on the street. Under part throttle, we toggled the arming switch on and off, and you could feel the truck immediately surge forward once the propane was activated. There was no lag in the system, and a 60-80hp increase felt like a conservative claim.

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