Do it! I noticed that my SVT definately breathes easier above around 4.5K now. Heck, after doing my Contour, I went and optimized the TB in my '87 Escort wagon with CFI! And yes, it made a difference in the upper RPMs too! Hey, when you have a 40mm TB, you gotta take everything you can get!

Marty

98 SVT, Black, No. 786, May 7, 1997. K&N, MSDS, Xcal2, Tint, Antennas, Big Gulp(R)-Sized Cupholder, Rear Dome Lt., Koni/Eibach, DMD, Pre-98 Sails, Brake Cooling Deflectors, Sidemarkers, Etc. 147K+ Miles "Get the Door - It's GrooveNerd!"