Yes, those temps are super high.
Under 1.4 bar of boost, I don't see more than 10-15 degrees over ambient with a full width IC (I have the same fast response GM IAT). In my case, I have the Treadstone TRST9 intercooler:
https://www.maperformance.com/products/treadstone-performance-trst9-series-intercooler-trstp9
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont replica Speedlines (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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