After 10+ seconds of boosting at high revs my car begins to overheat. The needle moves on the stock gauge not too much but it moves, and it had never moved before. It comes right back down when I get off the throttle. I thought the mechanics screwed up when they put back on the underbelly that directs air into the radiator, so I went back in and made sure it was hooked up right. It looked fine, but I took it out and reattached it. The coolant has also been changed. I only noticed it when I was doing a hard third gear run. My fans are working fine. Any Ideas.

 

u might want to try the Fan mod. What I did was remove the AC fuse, turned the AC on and set the fan at setting 3. this tricks the ECU to turn on your fans and cools your car down

 

Did you have this prob before you changed coolant. Reason I ask a 70-80%Distilled water and 20-30% antifreeze mix will run cooler and cool down faster than a 50/50 with tap water mix. Also water wetter helps too. Just a thought

 

Try topping it off my guess is the system was not burped enough. Just top it off with atleast 25% coolant at each stop.

 

Yes I had this problem before I changed the fluid. The problem started after the bodywork was done on the car