Jenny Craig could improve some of your guys 1/4 times.

 

Not if your like me... 5'7" and 140 lbs. I want to put weight on a bit.

 

 

so what is the weight for 350z track rim? how much lighter compare to stock 17"?

 

Fatass, I'm 5'7" and 135. Totally JK, wish I could put some more muscle on...but hey if being skinny makes my car faster...I better not work out.

NzZ

 

The stock 17" rims are 23 - 24 lbs. The 18" track rims weigh roughly 18 lbs.

5 ~ 6 lbs. difference, however, the diameters are different. I wouldn't expect huge gains on 1/4 mile runs, but you'll see a difference in handling, since the 18" are wider.

 

I WENT WITH ssr COMPETITIONS 14.3 LBS compared to 26lb stock 17's gained a 10th in the 1/8th mile

 

Good one!

Good posts too on gains from reducing rotating mass vs. just dropping a few lbs. from chunking the spare.
Got the Nismo lightweight flywheel on, plus the Rays rims that come on the Track, and a set of Goodyear F1GSD3's coming (front's are on perpetual backorder) which according to The Tire Rack will save another 10 lbs. of rotating mass over the OEM Potenza's.

DIE, rotating mass . . . DIE !!!

 

Speaking of rotating mass . . .

'Bout time to rotate m' *** up off the couch and fetch another miller lite . . .

 

Coming from a long history of drag racing, unsprung weight yields much more advantage than sprung weight. 40 lbs difference from the wheels is good for a .2 off your ET.. When I would run skinnies on my front with my Mustang, I would consistantly run .2 to .3 faster in the quarter mile..

 

DSGMach714, I think this post started on the subject of sprung weight and then migrated to it's more sophistcated cousin, roatating mass. One guy even brought up rotational inertia as in where the weight is concentrated, like near the center (best), or on the outer edge (worst).

Talking about the skinnies: No doubt on the rotating mass weight loss. You may also had some slightly better aerodynamics happenin' too that might have helped out a little, specially if your "fatties" stuck out from the front fender wells.

When you say 40 lbs. in reference to my situation, are you thinking I meant 10 lbs. per wheel? I meant 2.5 lbs per wheel for a total of 10, but hereagain it's rotating mass so hey I'm happy!

Rotating Mass