P71Vic

My dad is looking into buying a mustang and i was wondering if you guys know of any dyno tests done on a Bullitt with premium gas. Me and my dad were wondering if the bullitt is underrated from the factory.

Bullitt5339

I don't know a whole lot about the '08 Bullitt, since I'm kind of mad at Ford for making another Bullitt. Us '01 owners were told by Ford that there would never be another Bullitt made, but that's not the car's fault, I guess.

I will say that running premium fuel ie. 93 octane in a vehicle that doesn't require it is a waste of money. You get absolutely no gain unless the car is tuned for 93 octane, or has carbon buildup raising the compression so much that you have to run it to avoid detonation. People are under the assumption that that higher octane fuel burns hotter or something, when the exact opposite is actually true. Octane slows down burning, which makes sense if you think about what's happening when a car is detonating.

So, while I don't know the answer to your question, I would say without a tune, a Bullitt on 93 octane would put out the same as a Bullitt on 89 octane.

bullitt 736

I have seen dynos anywhere from 265 to 288 rwhp depending on weather and type of dyno.

The '08/09 Bullitt has a dual mapping tune than can recognize premium fuel almost immediately and will adust itself picking up a little more torque but no more HP.

All '05 and up Mustangs suffer from throttle lag due to the drive by wire (and tune). A good tune from Bama or Brenspeed can fix this.

I have two '08 Bullitt owner friends who have gotten a custon dyno tune. Both are at 300 rwhp and the lag is completely gone.

screaming_pc

The stock 2008 bullitt is 315 hp 325 ft/lb torque at the crank on 87.

On 93 octane it is 319 hp 335 ft/lb torque at the crank.

RWHP is 17% of that.

GrnBullitt08

I never had any dyno pulls done while I was stock, but they run alot quicker than a typical S197 from my expierence. The 3.73 gear in the rear helps and the upgraded tuning and suspension gives it a little more of an edge.

kwayson

Had 2008 Bullitt 3054 dyno'ed 5/5/09 has the Brenspeed tune. numbers were 298.7hp 305.9 tq

GrnBullitt08

Very nice.... I just got my brenspeed tune in today and uploaded. Running a 93 tune and it made a hell of a difference in performance and throttle response

pwd72s

I'm one of those idiots that actually reads owner's manuals. Mine had a line aimed at "Bullitt only"...it said that the car would run fine on regular, but for more power to run premium. This leads me to believe the Bullitt has a slightly different computer tune than the GT. Mine is an '09.

Donnie's GTS

the ecu in the 08-09 has an automatic calibrator that advances the spark with higher octane fuel. A cool feature, but aftermarket tunes will be better.

Cusp

According to the language in this Ford media release, adaptive spark was added to the 2008 Mustang GT. Which makes me wonder. Has any one tried higher octane in their stock 2008 or newer GTs and noticed any performance increases?

Personally all I can ad is. When a Ford dealer installed my FR1 package and the FRPP 91 tune which went with it, I still had about 4 gallons of 87 in the tank when I filled up with 91. There was no pinging on the way home. And I jumped on it a couple times too. So either the Adaptive Spark was working or the FRPP tune is lax enough to be ok with 90 instead of 91.

The link is in case anyone wanted to see where I got this from.

http://media.ford.com/article_displa...ticle_id=28718

No Knock

Thanks to Ford's improved adaptive spark ignition system, Lincoln MKS owners that fill up with regular unleaded don't have to worry about the common engine knock and pinging often associated with using a lower-grade gas.

This system can sense what type of fuel is being injected into the motor, and communicates the information to the powertrain control module (PCM), which adjusts the spark accordingly. “We have improved the algorithms and software so the vehicle's PCM is better able to figure out what fuel is being used and quickly adapt,” said Russ.

In addition to software changes, the ignition system features two knock sensors rather than one to further improve performance. These two sensors detect the presence of uncontrolled burning in the chambers more accurately, so the control module can retard engine timing as needed to eliminate the potential for engine knock and pinging.

Other vehicles that feature the improved two-sensor adaptive spark ignition system include the Mustang, equipped with the 4.6-liter V-8, Mustang Bullitt and the 2009 Ford Escape/Mercury Mariner equipped with the 3.0-liter V-6.