Many posts on the temps on these cars, what you experienced is normal. I have seen 235 in my car before, no issues. You can turn on the AC to get that fan going to and pull more air through the radiator if you want.
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1998 Six Speed, Torch Red Coupe - K&N CAI, Vararam Velocity Stack, Z06 exhaust, Z06 sway bars, Z06 intake, C6 Z06 shifter, stainless steel brake lines, Z06 shocks, Borla X pipe, drilled/slotted rotors. Dyno'ed at 330 RWHP & 340 RWTQ.