90C is about 194 which is the temperature most newer cars are supposed to run.
It takes about 107C to really damage things, staying under 100 is ideal...
Quality of oil and coolant plays in heavy here.. Are you running Blue Ice or Watter-Wetter in the cooling system? It really helps keep valve/cylinder head temps in control.
Cheers.
Dave
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If it has a motor its worth playing with.......
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