When I got my tune I told Brenspeed my car is all about road trips and I didn't want a tune that would compromise its reliabilty ie weird hicups, overheating, pinging. He sent me (87,91,93) tunes. The 93is very aggressive with no ill effects on short or long tripsand I LOVE it.

Brenspeedsaid theyhad an even moreaggressive 93tune but it was for racing only. I assume that the 93 race tune hastiming, fuel trims etc that are too aggressive for daily driving, like on a 100 deg. day intraffic.