Steeda-Tuned GT500

[SteedaJohn]

We recently tuned a 2013 GT500 here at Steeda Autosports whose only modifications included a 10% overdrive pulley, Kooks Long Tube header system with high flow cats, and a touch of our custom dyno tuning.

The difference? An additional 96.7 horsepower and 90.34 ft/lbs of torque at the wheels!

Needless to say, this car is now much more fun to drive! While the peak to peak torque gain is 90 ft/lbs, from 4600rpm to 6200rpm the torque difference is well over 100 ft/lbs through that particular range!

 

[Greg Hazlett]

Why no CAI?

 

[Steedagus]

Because our design for 07-12 will not fit the 2013. We have one in development.

Here's the dyno sheet too.

 

[Greg Hazlett]

Huh...thought every thing I read said intake wise the 13's were the same as the 12's...nice gains anyway!

 

[Premium08]

There you go thinking again

sent from, someone buy me a clutch..

 

[Seer]

Huh...thought every thing I read said intake wise the 13's were the same as the 12's...nice gains anyway!

They are the same, but their intake is a smaller 113mm (or right around there) which becomes a slight choke point at around 600rwhp. Hence why the aftermarket CAIs for over 600rwhp for the GT500 start around 123mm. I cannot wait for the day Steeda releases a 123mm+ CAI for PD blowers.

 

[Steedagus]

The intake is not the choke point. If it was it would have prevented us from making the power we did with the stock intake system. It is the resolution of the MAF that is an issue on 2010-earlier GT500’s before Ford switched to the digital frequency based MAF electronics.

The factory 2010-2013 GT500 intake system is 105mm. Our system is 114mm. The 2010 model has traditional MAF electronics and the 2011-13 have the new frequency based MAF electronics.

The 2010 with the same exact factory intake system would have never made it to this power level with the stock MAF electronics. They would have run out of resolution well below the power level we achieved. But the 2011-13’s will support this level easily with the same intake system because of the resolution of the new frequency based electronics. The intake itself supported the power level easily and so will a 114mm system with the new electronics.

On 2011-12 GT500 models our 114mm system can easily support well over 700+ rear wheel horsepower without restriction and without running out of MAF resolution. But with a 114mm set up on 2010-earlier setups unless you use SCT BA5000 MAF electronics you would run out of MAF to support these power levels. Most people just switch to a 123mm or larger set up instead.

On the issue of our intake not fitting the 2013 GT500, the intercooler pump and ABS module are relocated and interfere with our heat shield fitment.

 

[Seer]

The intake is not the choke point. If it was it would have prevented us from making the power we did with the stock intake system. It is the resolution of the MAF that is an issue on 2010-earlier GT500’s before Ford switched to the digital frequency based MAF electronics.

The factory 2010-2013 GT500 intake system is 105mm. Our system is 114mm. The 2010 model has traditional MAF electronics and the 2011-13 have the new frequency based MAF electronics.

The 2010 with the same exact factory intake system would have never made it to this power level with the stock MAF electronics. They would have run out of resolution well below the power level we achieved. But the 2011-13’s will support this level easily with the same intake system because of the resolution of the new frequency based electronics. The intake itself supported the power level easily and so will a 114mm system with the new electronics.

On 2011-12 GT500 models our 114mm system can easily support well over 700+ rear wheel horsepower without restriction and without running out of MAF resolution. But with a 114mm set up on 2010-earlier setups unless you use SCT BA5000 MAF electronics you would run out of MAF to support these power levels. Most people just switch to a 123mm or larger set up instead.

On the issue of our intake not fitting the 2013 GT500, the intercooler pump and ABS module are relocated and interfere with our heat shield fitment.

Interesting, guess 99.9% of the tuning companies and tuners are in bed with the intake companies because they all state you need to move to a 120+mm intake when reaching over 600whp.

 

[Steedagus]

The tuning companies most certainly have an interest in getting those intakes on the cars for over 600 horsepower, but it is to achieve safe tuning, not to just sell intakes. It is also more cost effective to change intake also than changing the electronics. And bigger is always better right?

You need to keep MAF signal resolution available to properly tune the MAF curve and keep proper fueling, on 2010-earlier cars that don't have a digital MAF, and especially 2007-09 GT500's that have an even smaller MAF housing going bigger keeps your MAF signal in the range needed to read actual airflow and safely tune the vehicle.

The new digital MAF's have a much higher resolution and will read the airflows on 2011+ GT500 to a much higher level allowing us to show how much more power the actual stock intake system will support.

 

[Seer]

I agree with you there except bigger is not always better but just right is