Some important modding infomation for Ford GT owners.

[Z06 KILLER]

This is for the members on here with Ford GT's that have done some modding or are at least thinking about it. This info may already be known but I thought I would contribute it because it is nonetheless important.

I met with several Ford GT owners today and they told me a few areas of importance that should be addressed, mainly the exhaust system and the rubber inlet bellow connecting the throttle body to the factory air box.

In regards to the air box, they learned by accident from numerous dyno runs that "pullied" GT's were losing some power at peak rpm's and did not know why initially. One of the tuners saw that the rubber inlet bellow was collapsing with the increased boost and would hinder performance, especially on the top end. Upon closer inspection of the inlet, they noticed there were only a few rings to maintain the opening. They remedied the problem by adding expansion rings and picked up horsepower and torque. Essentially, they prevented any robbing of horsepower due to collapse. I recently saw in person a prototype Kenne-Bell 2.8 liter supercharger for the Ford GT. It was mated with a dual 78 mm Accufab throttle body.

In reference to the exhaust, this particular owner changed his factory “box” style muffler and replaced it with an X-pipe without replacing a muffler in that section; it sounded great by the way. He said it lost approximately 40 plus pounds of weight and enhanced the cooling by allowing for more air circulation. While this mod added horsepower and torque along with some measurable weight reduction, it also prevented any further melting that he said is typical of the top of the air inlet grate on the outside of the vehicle. He said all GT’s are susceptible to such damage with stock design.

Most likely this information may already be common knowledge among GT owners and tuners like Heffner and Hennessey, but if not, this information will no doubt be useful.