Regarding relashing-Technosquare had/has nothing set-up for my 06' 45 yet, not sure if their R&D stops at 05' right now-Jet chip is more customizeable but its not cheap at $500, I pulled this from an earlier thread-
JetChip (
http://www.jetchip.com/) has extremely customizable options. You pay them a flat $500 fee and they'll send you a box with instructions. You use these instructions to pull your ECU and send it to them in the box (with OVERLY CAREFUL packing - 100% guarantee your ECU won't be damaged). They get the ECU, hack into it and determine if they can reflash your existing ECU, add a piggy-back program, or if an ECU swap unit must be made. You provide them with a dyno sheet after you've done ALL of your modifications planned, they'll correct your A/F ratio throughout the band for maximum performance and A/F safe mix, and you also tell them if you want your speed limiter (130-135 mph on our FXs) removed, manu-matic shifting quicker (no "luxury" delay) and other options"
Everything I have heard is that the advance does hold and that you SHOULD run 92+ (per Dr.2K)
Another past thread-Stock timing on an FX35 is +15 BTDC (as per underneath the hood, driver's side label) and FX45 is +12 BTDC. Timing bump changes this to +17 and +14, respectively. What does this mean? This means that the spark plug will fire EARLIER in the cycle, causing a more complete fuel/air burn since there's more time allowed for the ignite. You'll have some gains from this, but you'll lose 1 mpg (worthy trade-off in my opinion). The down-side is knock/ping. If you do this, you MUST use 91 or 93 octane gas (which you should anyways, the extra 20 cents per gallon only costs you $100-150 extra per year on avg and saves your engine of knock and gives you increased power and fuel economy, which makes up for some of the extra cost you pay). This timing bump must be done by a tool called the "Consult" or a program on a laptop with appropriate OBD-II/USB cable. A Nissan or Infiniti dealer can do this for you, and it is recommended to speak with a tech instead of a manager. If you speak with a tech while getting serviced or at the dealer for any reason for your car, you might be able to get him to do this for free, since it is a 5 minute plug-n-play procedure. Ask that they advance your timing 2 degrees, but make sure they know you want it +14 or +17 total (+12+2=+14 and +15+2=+17), and not +2 or you'll get horrible power loss (honda-civic-style-power). The program I was talking about is called Cipher, and the whole setup to do this is $400, however, a tech may charge you anywhere from $40-100 to do this simple plug in and input, where they plug in to the port to the bottom-left of your steering wheel column. They can also see if you have any fault codes..
Can't remember who posted these originally but thanks......