I've been running my 87 Tow tune all winter and we're finally getting some dry pavement again and I tried a little 0-60 run. It came out to 9.9 seconds! What the heck? I could run it stock in under 8 seconds...
I haven't tried it on my 91 perf tune yet, but I sure hope it would be better... I just can't imagine why It would be 2 seconds slower with any custom tune.