From the GTM site:

Nismo Final Drive 3.917 as opposed to OEM 4.08 (MT)

https://www.gtmotorsports.com/produc...cat=270&page=2

Better transfer of power to the pavement / traction ?
Anybody have experience with this ?

Who in their right mind would purchase anything from gtm right now due to their poor business practices...

i am running hankook ventus r-s3 305 x 35 /19. there not to bad.

i was waiting for the first person to coment about that one lol

they're*

:tiphat:

yikes...:eek:

I'm guessing that these are available from Nissan ??? I included the link as an illustration...I know about Sam and GTM.

Back to the main point - Any input as to the concept of utilizing a lower final drive to more efficiently handle the added power ?

Don't forget the *too also.

:tiphat:

i was being nice with only one correction lol :tup:

the factory final drive is 3.69, 3.9 would be moving to a smaller final drive gear and worse for traction with boost. what you want is the 350z final drive (3.53) or the automatic final drive (3.3).

I'm totally changing the subject here but is anyone going to zdays? I don't even know when the next one is.. Ready for a road trip to the mountains or something, anyone interested?

you're off by a few months, spring of 2015 would be the next one :icon17:

Will check in to this ... THANKS ! ... Ahhhhh : At last !!! :tiphat:
Makes perfect sense to go to a different ratio when drastically increasing the power... just didn't know where to go.

...wuz under the impression that my '09 6MT was 4.08 Final Drive ...
need to double check my info.

NASA is at Sebring Oct 4th-5th.

Sebring Events | National Auto Sport Association - Florida Region

Hello esfourteen :tiphat:

Did a little more legwork ...

Checked the Nissan stats for the 370z and you are right ... 3.69 is OEM factory final drive.
Here comes the curve ball ...

After having owned the car for about 6 months - I - (along with my mechanic) decided on the Stillen SC'r for more streetable power.

Some wheel spinning later thanks to the added HP ... we decided to upgrade the OEM hydraulic LSD to the Quaife 1.5 LSD.

The supposed final drive was to be 4.08 ... and that's what I thought it was for 3 years even tho' I wasn't able to detect any discernable difference in actual use.

Turns out that the OEM final drive gears hadn't been changed at all, and the car was still OEM at 3.69.

I wish I would have know this long long ago.

Thanks for your input - it gave me that Eureka moment of understanding.
I will now see how the car runs with the built motor and new SC'r.

First need to know the shift points especially at the max in 4th when I get it to the track again.

Then decide on the final drive based on what the car does at the track ...

Hopefully I might be able to do that this season.

Again, thanks for looking deeper in to my question and coming up with the answer I needed.

I'm running the quaife lsd and it works great. Way less wheel hop and on good new tires I can keep from spinning 3rd. 1st n 2nd still useless tho.

Hey Cosmo !
AOK to change the subject ... ...:usa:...

You've shown us that there is light at the end of the tunnel.
Glad you got your car back and it's running great !

Enjoy !