sits at about half way in traffic (about the 'o') however when crusin (loadin it up every now and again it can fluctuate alot. if i put my foot down for a bit the needle starts heading for the red and can take about a mile to chill out. also when bommin round town the neddle varys from the top of the 'n' to near the bottom.
i have gota little bit of a missfire at full boost but even at 120mph without the missfire occouring it was at the top of the 'n'.

could a split header tank cause the temperature to rise due to fall in pressure?

i was going to disconnect the water feed to the turbo to drop temps as i cant see a little bit of water cooling a glowing red lump of metal.

help!!!!!!!