Stanimal said:both are a must with turbos, but you still should know your egt's. to be real safe, i would put one on each bank (side). you can never be too safe. my friend has the worlds fastest vw @ over 209 milesm a hour. hes got a egt gauge on every cylinder. whats surprising is the fact that 2 cylinders run 200degrees hotter than the rest, so he knows not to put as much boost to it as he can. when he only had 2 pyros it all looked fine, but he was careful and it is paying off.
Flyinglow and anyone else who flys understand this post. Most highly tuned aircraft engines monitor the temperature in every cylinder. It is very very important in turbo charged aircraft engines...one of the check list points is to be sure that all cylinders are at operating temps, and during run-up that the cylinders do not exceed optimal temperatures...if one cylinder or more seem to have temperatures beyond parameters, we hope it is a bad guage...and we make sure it is checked before we go up again!