This place is about 30 min from me. When I was at a meet last year some dude with a G35 had his car tuned their and recommended it to me. I havent checked it out yet so let me know if its any good. If they dont work out you can drive a little farther to Columbus to IPS mtorsports, a couples friends of mine had their G35s and 350zs tuned by them and said they did a good job.

As a percentage of the cars cost, that's probably cheaper than spending $500 on a tune for a Z. Considering a set of tires for that thing costs ~$35k, a $20k tune isn't bad at all. Like the guy who owns a Bugatti cares about 20 grand. He's got that in change between his couch cushions.

Here is my review of Smokey's Dyno:

http://www.the370z.com/tuning/75372-...ml#post2448040