Haven't heard squat the last month and a half. What else are we gonna do? :-P

 

I don't see this as Internet racing. Someone asked a legit question and I don't see anything wrong with trying to come up with answers. The best deal will be when we can see some dyno numbers but there's nothing wrong with an educated guess is there?

 

An educated guess is one thing... but this thread seems kind of silly to me. The question was basically answered in the first reply - yes, there will *some* benefit to higher octane - that's common sense.

 

Incorrect. If your ignition timing is only tuned for maximum performance (without detonation) for using say 87 octane, then there will be no benefit to higher octane. You're just burning money. Ask our Country's famous nuclear scientist Dr. Bill Wattenburg... (or any tuner).

http://www.kgoam810.com/sectional.asp?id=33179

 

I agree, the answer is not cut and dry. The 4.0 for example got zero benefit from higher octane. MM & FF or 5.0 ran it with 87 and 91 octane and there was no improvement. With a tune, the 4.0 picked up 3 HP. The 4.6 3V gained 5 HP stock going to 91 octane. So its not a simple answer, it depends on the engine.

 

With the adaptive spark ignition and cold air intake on the 2011's, would there be any value in getting a canned performance tune and after-market CAI?

 

Good question. Why not e mail a tuner and see what they think. E mail Tillman or Brenspeed.

 

the stock CAI box in the 11 is the same in the 10. I just put in the Steeda CAI with a tune. And there's worlds of difference. So I'd imagine, there would be some benefit to the '11 maybe not as pronounced? maybe a lot more- who knows... but there will be some.

 

But I don't think that the 2010 had the adaptive spark ignition except for the Bullitt?

 

I believe the 2010 GT's have it as well. Which is why I ran premium the whole way even before I had a tune.

"Best of all, both engines will be able to run on regular unleaded just fine. According to powertrain supervisor Chris Roxin, "The 2010 Mustang runs great on regular fuel, and that is where we quote our peak numbers, but we also have a great dual-adaptive knock calibration that allows the 2010 Mustang to run on regular fuel as well as premium fuel, and the system figures it out itself." He added that premium fuel can improve the torque of the engine in the low- to mid-rpm range."

Source- bottom of the page.

 

My guess is the 2011 has 2 timing tables. Regular fuel and premium fuel. I highly doubt Ford built in 3 tables to cover 87, 91 and 93.

The 2010 is the same. Pretty sure the 315HP is based on running 91+ octane.

 

^^ see my above post.

According to powertrain supervisor Chris Roxin, "The 2010 Mustang runs great on regular fuel, and that is where we quote our peak numbers..."

 

Sweet. That's cool since I run 87 in mine.

 

Most def. knowing the '10s quote their peak on regular and the 11's can run on it as well- but the peak numbers are on mid grade (91) - but that's still a good savings $ wise... Considering the Camaro SS and Challenger R/T & SRT8 only take premium.

 

I live in Georgia. Our gas stations only have 87, 89 and 93 so running premium is almost 40 cents more per gallon.

 

The 2010 From page 281:

Octane recommendations (4.6L V8 engine)
Your vehicle will run normally on 87 octane regular 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.
For Shelby GT500 octane requirements, see the Shelby GT500
Supplement.

 

And the 2011 page 294:

Octane recommendations (5.0L V8 engine)
Your vehicle will run normally on 87 octane regular 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.
For Shelby GT500 octane requirements, see the Shelby GT500
Supplement.

 

91 to 93.... 500hp...yep definatly


can i buy a vowel?

 

For the Porsche the difference between 91 and 93 octane is right around 8hp and 6lbs of tq. However, this car was tuned to run on 93 octane and detunes the car when you run on 91.

Dave

 

Right - its the 08 Bullitt Adaptive Spark Ignition system carried forward for the '10 GT 4.6. The 09 GT did not have Bullitt upgrades. And Ford's Press Release for Bullitt stated that 91 premium will add up to 10 lb ft of torque between 1k and 4k. Not one comment about HP changes. The 315HP was based on 87 reg.

Where some guys are getting this fantastic HP increase and 93 octane ratings is beyond me. I'm from Missouri - show me Ford's documentation.