Originally Posted by
Xontroi
Dear friend thank you for your responce but the head that you show us at the video is not the stock head for N21 7T. If you didn't had problems with temps why did you replaced the stock one?
Edit: just now i realised that you are talking about N21 R7. The subject of this post is a N21 7T on road engine on a rally game car
Your right, I am sorry! the onroad heads are too small for GT cars they overheat, If you dont change it than you are forced to run the engine really rich in order to not damage it. If you do change it tune for around 230* which would be 300* with the on road head. IF you tune for 260+ with the large head the engine will be too lean.