![]() ![]() If they didn't they wouldn't be able to claim 315HP. Seeing how the increase in octane is worth several hp it's not hard to see where Ford got the higher HP rating from and why they recommend 91. On pg.258 of the owners manual: "Your vehicle will run normally on 87 octane fuel without damaging the engine, but premium fuel with an octane rating of 91 (R+M)/2 or higher is recommended for best overall performance." ![]() Ford recommends premium fuel for optimum performance, but the adaptive spark ignition will adjust the spark to burn regular fuel without damaging the engine."Īccording to Ford the recommended Bullitt fuel is premium: " Ford recommends premium fuel for optimum performance, but the adaptive spark ignition will adjust the spark to burn regular fuel without damaging the engine."" Bullitt can run on either premium or regular fuel. The system can sense, within a few seconds, what type of fuel is being injected into the motor and adjusts the spark to provide maximum torque at any given speed – and as much as 10 pounds-feet more between 1,000 and 4,000 rpm. The engine has been calibrated to operate with fuel octane ratings from 91 to 98 RON to optimise engine power output and protect engine durability."Ģ008 Bullitt marketing material: "Engine performance is further enhanced through the use of an innovative adaptive spark ignition system, new for the 2008 Mustang. The use of this premium quality fuel is rewarded by a higher power output of approximately 12 to 15PS. Knock Sensors – The engine knock sensors adjust spark timing and cylinder pressure to deliver high-level performance from 95 octane petrol. The end result is a better throttle response, improved engine power development and very smooth and responsive vehicle control under all conditions. Then again you can ask your tuner what's the best way to deal with lower octane if that's ever an issue.Ģ007 S-MAX: " Engine Management System – The Bosch ME 9.0 electronic management system allows precise control of cam-variation, hydraulic valve operation, turbo boost, electronic throttle position, ignition timing and fuel injection calibration. When you get a tune the factory tune stays in the tuner so you can switch back if need be as in no high octane gas available, or you can go into the tuner and back the advance off yourself without the need to return to the stock tune. The engine has no real way of knowing what octane gas you run but it can detect pinging via a knock sensor and change the timing accordingly. "Adaptive tune" is just a nice marketing term used for obvious reasons. Originally in Turbo Coupes activated by a switch when running higher octane and in many other vehicles via a knock sensor. It's been around since the '80's in one form or another. The so called "adaptive tune" is far from unique to Bullitt's. That way if there is an issue or it's not to your liking you can go back. Would you want someone to diagnose a problem with your car over the phone/internet, or at a reputable garage where they can actually hear the car and hook up the appropriate equipment? Not to mention drive it if there's a drivability issue.įind a reputable LOCAL tuner who can put it on a roller and tune it. A centri blower sounds so cool and works hand in glove with the 3.73 axle. You can still use the Bullitt strut brace as well. If you do the Vortech, you will nearly double the rwhp and it looks so cool under the hood. I've still got them in my garage.Īs I tell everyone, Mike. If I had it to do over again I would have saved the money of the delete plugs even though Brent at Brenspeed told me that removing the plates makes for a smoother tune. A custom tune is more money for very few horsepower. The problem with the Bullitt is that the computer is different than a normal GT and some places cannot sell you a canned tune. 25 seconds min!) which was one of my disappointments with the NA Bullitt. With my '07 and '05 GTs the tune difference with CAI was night and day and they were both faster than my Bullitt NA (according to my acceleromerer. But honestly, I didn't see much difference in it. I also put charge motion delete plugs in. I had both BAMA and Brenspeed tunes when my Bullitt was naturally aspirated. ![]()
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