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Lightweight rear rotors
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
Lightweight rear rotors
Need to change the stock rear rotors with something pretty much lighter, better if drilled and slotted, no need to be titanium though
.
Maybe scalloped rotors that bolt on my willwood caliper? what's the stock rear rotor size?
I've already superlight willwood calipers, front drilled rotors, braided hoses and hydroboost, need only these rotors to finish my set up...
Any link where to get them?
.Maybe scalloped rotors that bolt on my willwood caliper? what's the stock rear rotor size?
I've already superlight willwood calipers, front drilled rotors, braided hoses and hydroboost, need only these rotors to finish my set up...
Any link where to get them?
Last edited by panic; Nov 5, 2007 at 03:05 PM.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Hey, I have an idea. Let me send you some hole saws and you can start putting holes in whatever is needed. This should lighten things up. 
Man you are getting serious about losing weight on the car. I'm sure there are lighter weight rotors out there. I'm not much help on that.
What is the current weight now?
Man you are getting serious about losing weight on the car. I'm sure there are lighter weight rotors out there. I'm not much help on that.
What is the current weight now?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Exactly which superlight are you using on the front?
Do your front tires lock up first? My rear tires have always locked up first.
I would ask Keith at Corvette engineering for a quote. I'm going for bigger 13 X 1.250 inch front disks Stock is 11.75 X 1.250 inch
Do your front tires lock up first? My rear tires have always locked up first.
I would ask Keith at Corvette engineering for a quote. I'm going for bigger 13 X 1.250 inch front disks Stock is 11.75 X 1.250 inch
Last edited by gkull; Nov 5, 2007 at 05:11 PM.
Instructor
Joined: Sep 2007
Posts: 138
Likes: 1
Stock C3 rotors are 11.75 dia x 1.25 t. They weigh about 17-18 lbs. If you go to a two piece rotor you will need a spot caliper for an E-brake. I suppose you could save 4 or 5lbs with a lot of work and expense. The rear suspension with wheel and tire is north of 100lbs. Commonly held opinion is only the most discerning driver could notice a 10% reduction in weight.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I gutted out all the parking brake crap years ago as a weight savings. It never really would save you in an emergency and when "auto " equiped you have park to hold you in place. now with a manual tranny I just leave it in gear.
Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
Hey, I have an idea. Let me send you some hole saws and you can start putting holes in whatever is needed. This should lighten things up.
Man you are getting serious about losing weight on the car. I'm sure there are lighter weight rotors out there. I'm not much help on that.
What is the current weight now?
Man you are getting serious about losing weight on the car. I'm sure there are lighter weight rotors out there. I'm not much help on that.
What is the current weight now?
).New mods get more and more expensive the further you go now.
When i get all these mods put together i'll put the car on the scale again and will post the weight sheet...give me a month or so
Last edited by panic; Nov 6, 2007 at 01:22 AM.
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
It all depends on how you drive your car and where. If you cruise sweetly around and dont pay much attention on your car performance (i mean in detail...) probably you won't discern much but if you like to notice every reaction, going quick on fast bends you'll notice every 50 lbs you've dropped...
Last edited by panic; Nov 6, 2007 at 01:24 AM.
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Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
Rear lock first, front is very accurate, overall i have a very good stopping force and believe i dont need larger brakes, with about 800lbs weight missing, you automatically upgrade not only the acceleration but also the stopping capacity AND accurancy, by far.
Furthermore, Hydroboost sistem is an absolute must.
Last edited by panic; Nov 6, 2007 at 01:25 AM.
Instructor
Joined: Sep 2007
Posts: 138
Likes: 1
I've drop about 20% weight already from stock weight on my '77, believe me it's very noticeable indeed...it was even when the weight savings were half anyway.
It all depends on how you drive your car and where. If you cruise sweetly around and dont pay much attention on your car performance (i mean in detail...) probably you won't discern much but if you like to notice every reaction, going quick on fast bends you'll notice every 50 lbs you've dropped...
It all depends on how you drive your car and where. If you cruise sweetly around and dont pay much attention on your car performance (i mean in detail...) probably you won't discern much but if you like to notice every reaction, going quick on fast bends you'll notice every 50 lbs you've dropped...
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
Well you would not notice 10% reduction weight on the suspension components only BUT 10% on suspensions plus many other 10%'s here and there and you'll start noticing weight reduction indeed...reducing weight (unsprung and not unsprung) is like a pension that you invest week by week, at the end of sometime you have a certain amount to spend, even if the amount of each 'contribution' is nearly nihil.
Same for weight savings...
Last edited by panic; Nov 7, 2007 at 07:52 AM.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
sorry
Well you would not notice 10% reduction weight on the suspension components only BUT 10% on suspensions plus many other 10%'s here and there and you'll start noticing weight reduction indeed...reducing weight (unsprung and not unsprung) is like a pension that you invest week by week, at the end of sometime you have a certain amount to spend, even if the amount of each 'contribution' is nearly nihil.
Same for weight savings...
Well you would not notice 10% reduction weight on the suspension components only BUT 10% on suspensions plus many other 10%'s here and there and you'll start noticing weight reduction indeed...reducing weight (unsprung and not unsprung) is like a pension that you invest week by week, at the end of sometime you have a certain amount to spend, even if the amount of each 'contribution' is nearly nihil.
Same for weight savings...
I think Duntov was able to pull quite a bit of extra weight off
the body of the grand sports.
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
lighter FG, i've been longly looking for lighter/thinner FG but up to now with no results whatsoever.
