19x9.5 HP Evos w/ 275/30/19 Nitto 555 = 57lbs WITH AIR
STOCK SS 10 Spokes w/ 275/40/17 BFG's = 48lbs WITH AIR


I knew the 19's would be heavier but HOW much power is it robbing to turn that extra 18lbs?

I put the stockers back on and the car is noticably faster! YES, I said it. I can feel the difference in the 2nd to third shift as well as how fast it climbs the RPM compared to the HP's.


What do you guys think? I dont want to ditch the wheels cause they look incredible! BUT I dont want to keep them if its costing me 15HP.

Thanks

 

Well, it is actually 36 lbs. extra and your car really thinks that is it is 72 lbs. because it is rolling mass. The only way to tell actual loss is by using both sets of wheels at the track back to back. I would guess you are losing a tenth or two.

There are lots of bigger wheels out there that are light-weight. Boyd's, Budnik's, Fikse's, Intro's, etc.

 

The "rotating mass" deal basically says for every pound of weight eliminated it will "lighten" the rotating mass between 4-7 lbs, depending on the distance from the axis (axle) to the weight in question. For instance, a 55 lb 19 in. wheel requires more power than a 17 in. 55 lb. wheel because the 19 in. wheel has its weight further from the axis (axle) and centrifigal force "adds" the additional "weight." This assumes the weight is equally distributed over the entire area. Therefore, your 9 lb./wheel savings can translate into "up to" 63 lb. less weight/wheel your motor has to overcome times 4 wheels equals 250 lbs. dead "weight" eliminated . That would a noticable difference in overall performance. Also the lighter wheels contribute to quicker braking, better handling, etc. Hope this makes sense. I'm looking for some light wt. wheels but $5300 for the 547 HREs are a lil steep

 

I have had the stockers on for the weekend now and am leaving them on untill I figure out what I can do as far as getting other light 18" wheels. The car just looks awful in comparason to it with the HPs on. Im not just looking for speed Im looking for handling and Looks too.

I think the ccw or HRE's are sweet but man what a price tag.

Anyone know what OEM 18" chromed Z06's weigh? Im looking for a 21lb or lighter rim.

 

Factory z06 rims weigh around 21 lbs. so chromes are going to be much heavier. I could probably find an exact weight later.

You might look into Bogart's road race wheels...super light.

 

Yeah, I saw the bogarts. BUt they arent very attractive. I am going for looks too. Thats where Im going to have a hard time not paying 5k for a set of 4 wheels.

 

I can get you a pretty good deal on some of the higher end wheels. PM me if you are interested in Fikse, HRE, CCW, etc.

 

I have several sets of wheels..and am looking to get a set of 19 inch Evo's "new lightning" wheels. For looks,not everyday driving,If you find a set you like better hit me up with a pm,Im interested in buying yours ,if you find somethen else.... How is your traction with a 30 series tire?