Here's my 2 cents
I bought three Thrahser chips for $70. One for 92 octane with anti-theft and lean cruise mode, one for max performance on 100 octane, and one for max performance on 108 octane. Paid $50 for a Jay Carter 93 street chip, too.
I also got a K&N for $60-something I think, and a Terry Houston downpipe for $400.
With the JC chip, K&N and THDP, I went 14.1@96. I had no posi, a loose timing chain, and the crack sensor was making contact with the balancer. So I was getting a lot of knock retard. the car was dead on the top end.
The crank sensor has been replaced, and although I still have some slack in the timing chain, the cam sensor has been adjusted to "compensate" for it. Now the car runs a hell of a lot better.
I also turned the boost up to 19-20 lbs.
So far, I've beaten a new Mustang GT, and new Camaro Z28, and three ricers (which weren't even close like the Mustang and camaro were). One was a V6 Accord, one was a Prelude, and one was a Civic "Type R" (at least that's what his stickers said). Most of these races where when my car was in it's 14.1-second-ET state of tune (including the race against the LS1 oddly enough). I've yet to experience a defeat in my GN, but if I do, I'll post it here along with my victories.
I had an NSX following me once. It was when my car was in it's 14.1-second-ET state of tune. He was behind me on a 2-lane, so I made a turn at the next intersection to drive over to a 4-lane road. He followed! When I get to the 4-lane, I turned right instead of left unfortunately. Going right the 4-lane merges into a 2-lane after a few feet. But going left would have been 4-lane for miles. Damn, I wish I had known that then. He followed me right, and didn't try to pass me on the short 4-lane section. After that, it was all 2-lane with nowhere to race. He eventually turned off somewhere. I've been looking for him ever since.
Aren't NSXs something like $80k? That's a lot of money to spend on a car that only runs mid-13s.