I noticed that the power is not smooth all the way through the curve. From 2-4k the throttle response feels sluggish compared from 4-7k. I have basic breathing mods - spacer z-tube exhaust filter. I have some disposable income and am seeking to address this. I'm considering pulleys and a tune but wanted to get other insight. Thanks in advance.

 

art pipes & osiris tune.

/thread.

 

Yeah, that ^^^

If you couple the ART pipes with an XYZ pipe it will also help, as will an MREV2, but to slowly diminishing returns.

 

3.7 FD gears or shorter, 1-piece aluminum or CF driveshaft.

 

Does replacing DS with a carbon one make a big difference...how/much exactly?

 

https://g35driver.com/forums/drivetr...eshaft-11.html

Pretty sure their is a dyno in there somewhere. Get to searching

 

Replacing the driveshaft should come after all that other stuff, shoot you can't even go truely full throttle without an Osiris reflash to remove the WOT restriction... That alone will make a huge difference

 

So whilst the gears and/or driveshaft will help it be a little sharper in response, it won't change the power delivery low down.

 

ART pipes and 3.7 gears made the biggest difference in low end power and acceleration for me. Aluminum DS is next for me.

 

Yup, it absolutely will improve the acceleration, but only the ART pipes will help with the smooth power production.

 

So is the gearing done through the tune?

 

No its done by the rear differential. The 3.7 Final Drive gear ratio is out of a G37/370z. You simply purchase their OEM rear differential, make sure you get the VLSD version as well. From there it is a direct swap from your OEM diff. There is a thread around here that shows you how to DIY and exactly which pumpkin you need.