SCT X4 Questions.

[Swamprabbit]

Just got my SCT X4 programmer.

2003 EX XL 4.0 All stock except tires and lift.

I turned off the rear O2 sensors.

(1st) What do I set the speedo cal at? It asks for tire rotations.
Stock gear 3:73
Stock Tire 235/70 R16
Current Tire 285/75 R16

(2) any recommended changes I need to make?

Thanks guys.

 

[swshawaii]

One of MANY tire calculators available on line.

Revs/Mile = 614.6
https://tiresize.com/calculator/

 

[drdoom]

Have you replaced the stock tune yet?

 

[Swamprabbit]

One of MANY tire calculators available on line.

Revs/Mile = 614.6
https://tiresize.com/calculator/

That's what I was thinking. But the last programer I had you entered the tire size. LOL

Thank you.

 

[Swamprabbit]

Have you replaced the stock tune yet?

Yes.All I did was step up one octane rating on it. Turned off the rear O2 sensors. Reset the speedo. That's it.

 

[Swamprabbit]

Has anyone mess with the transmission setting. For example preasure settings?

 

[lynchy wa]

No....Cos that sounds bloody scary

 

[Swamprabbit]

No....Cos that sounds bloody scary

It does to me also. But. There is always a BUT.
This is my 1st tuner that allowed for several different options. Unlike superchip where you are limiter to what they installed. (pre programmed)

 

[SPSully]

increasing the trans pressure (to a certain extent) is going to make it shift harder.... but like a shift kit, the harder shift moves it in gear faster causing for less wear and tear during shift.