Expected gain when tuning a stock manual GT?

[Old School1]

I have not seen much on performance improvement (HSP curve and max hsp). What is the expected gain when tuning a stock manual GT?

Thanks

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[robvas]

Not a ton. Get a set of 4.09 gears

 

[ChitownStang]

From what I've read and seen ~20hp max on 93 tune, if that
~50hp+ on E85 fuel.
I run a flex tune from DRP Motorsports for last 8 months.
During the summer with E70 which is max I get in my area , she is noticeably faster all through the rpm's .
In the winter I use 93 and it's ok.

 

[GrabThatBlue]

20hp

 

[Achlys]

I looked into this very question when I first got my GT. Tuner told me that a tune wasn’t worth the dollars spent for a stock GT. To spend my dollars on bolt on’s and then come back. Right now I’m happy with the performance, I’m not looking to race it, although a track day would be fun. I built a stage three focus ST a few years back and the dyno proved the benefit. So I’ve got with eye appeal mostly for now. Installed the Steeda Pro-flow intake for the looks and upper strut brace, I’m happy.

 

[Cobrakit]

An example of 93 octane tune.

 

[ZXMustang]

on 93 30ish and from stock to e85 is about 60ish. Its worth it.

 

[robvas]

Take all the numbers you see with a grain of salt, dynos can be manipulated and the same car/tune can vary widely from run to run based on a ton of things...

If one says they can get significantly more than the others, something's up

 

[LouG]

Gone are the days when I could get 15 - 20hp increase on my Suzuki Bandit with just a can and a rejet.

 

[Alex381]

Not a ton. Get a set of 4.09 gears

I had those on my 2014 Mustang GT. Would not recommend, but then again I think the stock S650 GT has plenty of power.

 

[robvas]

I had those on my 2014 Mustang GT. Would not recommend, but then again I think the stock S650 GT has plenty of power.

You'd want them. Transmission is geared differently. 2018+ cars have tallll gears

 

[Alex381]

You'd want them. Transmission is geared differently. 2018+ cars have tallll gears

I know. I‘ve got over 10k miles on my 24. I find the gearing to be perfect. But I also don’t race the car.

 

[Achlys]

To the point: 93 octane, and corn fumes. Where I’m at 91 is it. My GT is a daily driver, tuning for 20 HP IMHO is worthless. I would rather have a nice looking good handling GT. Tortoise & the hare, it’s all about what you want from your vehicle. Nether is wrong.

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