Originally Posted by ashtrojan2008

That 400* is relative.. Readings will vary greatly depending on where your probe is placed. Egts are best used for comparison on each engine. For example my probe on my z33 is before the turbo where the runners collect, an idle is about 800*. After the turbo on the s30 and z32 idle is somewhere around 600* when cool.

Fwiw I have 45k daily driven hard miles on my 18g's with no issues whatsoever.

Ross