You'll save a few grams of weight in the motor and lose a bunch in your wallet. The crank will set you back about $3,200, and about $16,000 for the motor build.

LOL wow that's definitely not worth the effort and money :wtf2: Unless going FI or some other more involved build

Not a reduction, but IS a weight:
The Racebred 4 inch splitter for the Nismo V1 bumper weighs 18 lbs and 12 oz

It extends back to the rear of the front bumper at the sides, straight across on the rear.

Will be weighing the 9LR splitter eventually, which extends much further back.

Sounds like the APR splitter I have.

Guys concerning weight distribution and engine bay heat reduction. Did anybody relocate radiator to the trunk of the car?

Don't need to. If you are a track car and worried about oil temps, then a dry sump is the way to go. Otherwise, just do proper ducting and install hood vents. Move the oil cooler to the side

thanks for reply.

Oil temperature isnt issues. Issue is weight and engine bay temperature.

I have two oil coolers in the rows and I will most probably relocate them to the centre because brakes and tires are overheating after several laps.

Over winter I will gutt my nismo and thinking about realocating some of the weight to the rear of the car. Thats why I´m asking is somebody did this with 370z. I know about many people doing this to BMW´s but none with Z.

If you're from Prague then if I were in your shoes I'd contact https://www.thunderlane.eu/ and talk with him about custom suspension for yourself, so you can mitigate the heavier front with proper setup

Questions to the extreme weight saving projects.

Concerning doors gutting. Did you remove reinforcements(door bars)? If yes, how you remove upper at the edge of the doors? Is this reinforcement welded to doors or not?