A superchip and underdrive pulley worked really well for my 01 zx3. Now I have a 03 svt focus and have installed a cold air intake, underdrive pulleys and a FC Throttle body. They help a little. I'm waiting on my computer to come back from fordchip to see if that helps.
From what I have read, changing the flywheel and clutch, throttle body, some sort of intake. Other than that, wait till it cools off again. The warm weather is killing everyones car. Oh, you can put a turbo or supercharger on and I am sure that will help.
someone did that already and said it did help. But ended up putting a hole in his t-body and had to fix it. I would like to drive a svt with the t-body first before dropping that kinda cash on it. If the throttle response is really that improved it could be worth the money.