EGT temp & censor distance

Does anyone know what is reliable egt sencor distance and what could be max temp before seitzing?

Now i have censor 18cm from piston exhaust port and temp is 570-590 celsius when its running best.

setup is pinasco 177 alu,sip evo exhaust,dellorto 28bs carb,rd350 reedvalve.




Hi Mika,

The distance should be shorter =>10cm is usually recommended.

On my Polini 221 alu I already got up to 600°C for short duration but I try to remain below.

Here a link I found to evaluate the right EGT range:

For sure this is only for indication and I can imagine iron and aluminium cylinders do not have the same range...