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Here, check out other threads on the topic. https://www.mustang7g.com/forums/threads/headers-and-tuning-2-questions.170547/ and https://www.mustang7g.com/forums/threads/pbd-tuning-a10.171654/ and https://www.mustang7g.com/forums/threads/cai-tune-gains.171117/ just as a few examples.

Tuning was unlocked on the S650 in August. You can have your car tuned for whatever changes you make and change other things with the tune, as well, like transmission shifting, getting rid of the top speed limiter, raising the rpm shift points, etc.

I do not have a dog in the fight, other than posting the results, but I cannot possibly know whether he or you did something different that makes the inconsistency resolvable. Nevertheless, there are acceleration tests and lap times posted above, too, all of which consistently show the same...

LOL, it has been cold in Georgia, in the 50s, and damp. I bought my car in June, and have been amazed at how well these Trofeo RS tires perform (as long as it does not rain), but, well, it's Georgia, and June through September is hot. When it is 52° outside and damp air, and you throw on your...

Well, he was asking about doing headers first and maybe a Whipple down the road. GT Thunder, There are some gains to be made with headers and a tune, so your car will be faster and feel faster and be fun to drive. Your mechanic is correct about the 2" headers. There are also some fit issues...

But it does make a difference. It has been measured objectively, both on a circuit track and in acceleration, with cites provided above. The difference between how a 1964 Mustang would perform lapping a race track circuit compared to a new Dark Horse with the handling package is made up of...

0-60 times and 40-100 times with a more powerful car than a Miata

Wiley, whom you cited above, and others, are talking about flow formed. I just wanted to make sure we all knew what we were discussing. I would venture a guess that flow formed sell lots more wheels than forged, just due to cost. Apex, which you mentioned, sells both. The cost difference is...

On the kart track, we tested the heavy Masitaly wheels first, then the lightweight Volks. Then we retested the heavy wheels to correct for any changes in weather, track conditions, and the driver becoming accustomed to the course. This test showed clear differences both on the kart track and at...

If I were buying a dedicated pair of track wheels, I would definitely be trying to purchase fully forged. I believe a difference would show up in the lap times, but they would also be stronger for the lighter weight.

Just so we are all talking about the same thing here, flow formed forged means that the rims are forged but the centers are cast. So if you can afford it, forged are better than flow formed. The question is whether you can afford it or not and whether it makes a difference. Ford sticks cast...

So why isn't anybody doing this?

E85 is about $2.80 here, so only about a dollar less than 93 octane.

Thank you for answering, though. I get it about stickier tires - that seems to overwhelm other changes. (I also read over at trackmustangsonline.com, including your thread and posts, trying to learn as much as I can)

The brakes are great on the GT, but the shorter stopping distance on the Dark Horse handling package has mostly to do with the tires, Trofeo RS. They are essentially track tires that give an insanely short stopping distance due to enormous amounts of grip on asphalt.

It is never exactly or consistently E85 anywhere and can be as low as E50. The range you describe, 51% to 83%, is typical, with winter blends having less alcohol than summer.

So a question from somebody who has never changed alignment for the track: Does this make a huge or significant difference in lateral grip that you can feel while in the turns, at much higher speeds? Or is it a minimal amount but everything counts in small amounts?

Maybe I am showing my age to like a wheel with those bolt heads showing all the way around inside the lip, but that bronze/black wheel is a good looking wheel.

My major concern with E85 is the very small gas tank on these Mustangs. I actually drive mine.

So you just put on the 3.5 and drive around on the street, get groceries?