Don't want to rain on your parade... BUT:biggrin:
GTR is 3800 lbs. The new Spec V is rumor to be 350lbs lighter, which make it 3450lbs. That car has some of the heaviest parts you can use on a car
I replaced the exhaust system on my NSX, it shed about 30 lbs, Type R seats, 30 lbs each side. That's already about 100 lbs.
The new Honda will be again aluminum frame, plus more likely CF and other exotic parts. The newer Honda engines are 20 to 30% lighter than the old, so this V10 will probably weight similar to the NSX V6, if not, just slightly more.
On paper, the preliminary rumor... This car is "only" 250 lbs heavier than the regular NSX, and 500 or so lbs heavier than NSX-R.
You guys have absolutely no faith with a company that is KNOWN to built light weight cars.
Honda is NOT MB or BMW, they DON'T stick big engines into their cars because they over build the chassis, they put big engines into cars because they want to make it go fast.
IRT to the stock seats. The stock seats weigh 35 lbs each, total. I've weighed them many times. A Recaro PP CF (comparable to the Type R in weight) comes in around 10 lbs, and even if you got fixed rails, that 5 lbs each. You probably have fixed rails so that at least 10 - 15 lbs. Even the Type R + electronic/sliding rails, I can't see being anything less than 20.. maybe 15 lbs total so there's no way you're getting 30 lbs loss each unless you plan on sitting on the floor and using a pillow...