06 Auto with P1SC

[85GT 7.0]

Hi,
I have a 06 GT automatic with a P1SC HO. The car is completly stock with the complete Procharger kit all the way to their canned tune and fuel pump. The best time so far is a 12.66 @ 109 with a 2.011 sixty on Nitto 555 245-45-18 at 3860 lbs.Naturally I want to improve the ET but this is also a daily driver. Would a custom tune be worth the money? What about a converter? Are 11.90's possible without going into the engine or changing the rear gear? I am very interested in what everyone thinks. Thanks in advance for the advice.

 

[KrisR]

My car is sort-of similar. It also is an 06 that is all stock except for a Vortech aftercooled S-trim kit with the 3.6" pulley that comes with that kit. Mine has 4.10 gears but is otherwise all factory. Mine does have a custom tune by 'Justune'. I bought the car this way.
On 275/40-17 Nitto NT05R drag radials the car's best time is an 11.97 @ 116mph with a 1.79 60'. The tune definitely could use some tweaking in the shift points as it bumps the 6500rpm rev limiter on 1-2 and 2-3 shifts and shifts into 4th at only 5900, so there's definitely more in it.
Tune has about 21° of timing at 6400rpm, high teens at lower rpm.

I don't like the 4.10 gears in this car. I plan on putting 3.31s or 3.55s in it and doing a 3000ish stall converter. I do a lot of freeway driving and the 4.10s get old in a hurry. Probably build the trans while it's apart. Money pit!

 

[85GT 7.0]

06 Auto

I am thinking about adding a stall, but I dont know if the tires will handle it. Looks like your car is about where I want to go but I am not going to change the gears. Thanks for the reply.

 

[KrisR]

I am thinking about adding a stall, but I dont know if the tires will handle it. Looks like your car is about where I want to go but I am not going to change the gears. Thanks for the reply.

No, you will definitely need drag radials if you change the converter. But a good converter and some sticky tires, plus a custom dyno tune by someone who really knows what they're doing, will do wonders for your car. I would leave the gears in your car alone personally.

 

[85GT 7.0]

06 Auto

Suppose to go to the chassis dyno next week,I am interested to see what difference it will make in the quarter mile time. I dont expect a big gain though.

 

[mustangtcs]

Make sure that you have them verify the shift points why you are at the dyno. You can only adjust the shift points down 3 mph but can raise it 7mph.

 

[85GT 7.0]

My tuner has the option of shifting by MPH or RPM. I have it set at 6400 right now.

 

[mustangtcs]

My tuner has the option of shifting by MPH or RPM. I have it set at 6400 right now.

Ok what tuner do you have? I have mine 6000-6100 just to keep the car safe. I have had it to 6800 multiple times adjusting shift points and it never popped.

 

[85GT 7.0]

Its a Dialblo InTune

Ok what tuner do you have? I have mine 6000-6100 just to keep the car safe. I have had it to 6800 multiple times adjusting shift points and it never popped.