Your temperatures do not sound out of line for an air-to-air at fairly high power, assuming the ambient air is around 85F or so. I have an air-water-air system and I'm about 50 above ambient air at 22-25 psi boost at the end.
It will get tougher fast to get lower than 50F above ambient without ice water if you are making any power. I don't believe anyone could do 110 with an air-to-air in 85F ambient unless the power was low and the intercooler pretty large.
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89 LX. 363, single turbo, Super Vic EFI, TFS high port heads by TEA, solid roller, glide. Holley HP EFI. (exact combo varies)