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Department of Weights and Measures

Black Boss

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SCGT500 said:
Anyone know a close weight of a stock rotor versus a 2 piece rotor on a S550 or GT350?

Just wondering what type weight saving there is for that crazy money. Lol


...and with that, I recieved a couple spare GT Performance Pack rotors today.... 35 lbs each!!!!!

Crazy :(
Front 2 piece GT350 rotors are 30 lbs; Rears 18 lbs
 

cloud9

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Black Boss said:
Front 2 piece GT350 rotors are 30 lbs; Rears 18 lbs
Updated first post. That's 5 lbs heavier than the Boss front. I don't remember weighing a rear. Does anyone know what they weigh?

The front rotors must be a lot thicker than the rears. That's pretty interesting, but good since we could have used more mass on the front Boss rotors. They should hold up to the heat better.
 

VoodooBoss

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cloud9 said:
Updated first post. That's 5 lbs heavier than the Boss front. I don't remember weighing a rear. Does anyone know what they weigh?
Than the stock Boss rotor? The GT350 rotors are significantly larger. I still think a Stoptech or Girodisc two piece will save a couple of pounds vs the stock rotors, maybe more. I'm also curious if the drilled rotors will crack at the holes.
 

cloud9

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VoodooBOSS said:
Than the stock Boss rotor? The GT350 rotors are significantly larger. I still think a Stoptech or Girodisc two piece will save a couple of pounds vs the stock rotors, maybe more. I'm also curious if the drilled rotors will crack at the holes.
Yes. Stock Boss front rotors are 25 lbs. To be honest I'm not looking for a lightweight alternative to the GT350 rotors. I'm looking for better heat dissipation and durability. That takes mass.
 

SCGT500

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Black Boss said:
Front 2 piece GT350 rotors are 30 lbs; Rears 18 lbs
Thanks.

Though 5 lbs of rotating mass is somewhat significant, at $1000 a pair not worth it for a few weekends a year of track time. :(
 

krt22

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cloud9 said:
Updated first post. That's 5 lbs heavier than the Boss front. I don't remember weighing a rear. Does anyone know what they weigh?

The front rotors must be a lot thicker than the rears. That's pretty interesting, but good since we could have used more mass on the front Boss rotors. They should hold up to the heat better.
Thicker yes, in terms of the hub/ring ratio. The rear rotor has a larger hub (im guessing for the parking brake+weight savings) so much less steel on the rear rotor.
 

ArizonaBOSS

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On the brake rotor bit--the 15" Brembo Pro kit that is on the IMSA 350R-C cars and clears 18" wheels uses two-piece rotor assemblies that are 18lbs in the front.
 

cloud9

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ArizonaBOSS said:
On the brake rotor bit--the 15" Brembo Pro kit that is on the IMSA 350R-C cars and clears 18" wheels uses two-piece rotor assemblies that are 18lbs in the front.
Iron rings?? What are replacement rotor (ring) costs?
 

ArizonaBOSS

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cloud9 said:
Iron rings?? What are replacement rotor (ring) costs?
Yes, iron rings w/ aluminum hats. Replacement ring cost around $375-500 per side depending on if you use StopTech or Brembo, respectively (interchangeable, as I'm told). That is for the 35mm thick, 72-vane rotors.
 

8250RPM

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No sorry. I bought them from Darren at FORGELINE already mounted and balanced. They said the wheels alone are 20-22 pounds each


Sent from my iPhone using Tapatalk
 

Bill Pemberton

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Let's see, weighed 170 lbs 5 years ago , now am at 210, so car is not here and I have about 4 months to get rid of 40 pounds of unsightly Faaaaatttt ! Still won't be down to Slim Stud Gaspar's poundage , but it is a start.

1. +1 , would be able to get back into my racing suit ( $ savings )
2. +$50 bucks a month eating less junk food ( can spend on parts)
3. + $50 bucks a month on less beer
4. - $50 bucks of fun as no beer
5. +200 -$400 to spend on parts to help the car lose more weight if I achieve the goal.

Let the games begin!
 

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