is this the same case with a 2006 g35 sedan? its rated at 289hp. ive got a MD plenum spacer and jwt pop charger/z tube..

 

This may help.
https://g35driver.com/forums/g35-coupe-v35-2003-07/124211-dyno-d-results-mods.html

 

The AT's are eating up more like 20%. My sedan baselined at 215/217. Even with all my mods listed in my sig (not the reflash), it only dynoed at 235HP on the same dynojet. I've probably got 240-245 now with the fuel/timing reflash, but you're not going to get much on these from bolt-on mods. I think I've got about 306 crank now which equals the listed '07 output.

The first '07 dynos on the 5AT's should come in around 240-245 SAE adjusted on dynojets.

 

ya the AT's eat up a lot! I'm going back to the dyno next month with my motordyne spacer and hopefully a grounding kit to test!