Modern cars are water cooled and have better head design so cannot be compared.
Have you calculated your boosted compression ratio?
What grade fuel do you run?
Do you have LM1 or Dyno A/F ratios graphed?
Are you running an intercooler?
Generally speaking 7lb of boost is acceptable in a 3.2L turbo application. I assume the same can be said for supercharging.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8