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Need help with brake size!!!

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Old Jan 17, 2010 | 12:02 AM
  #1  
bowtiejoe's Avatar
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From: NORTH JERSEY
Car: 68 CAMARO, 05 VETTE, 90 IROC
Engine: 327,LS2,305TPI
Transmission: TH400,STOCK,5 SPEED
Axle/Gears: 373,STOCK,342
Need help with brake size!!!

I got a 1990 Iroc Z, LB9,MM5,G92,J65. I bought cross drilled rotors over the internet and specified my exact car but recieved 1LE rotors and pads. My question is, are the stock rotors on the front of my car 10.5"? and the rear rotors that came in also look slightly bigger, did 1Le's also have bigger rear discs? The ones they sent me are fronts 11 55/64" and rears 11.5". What size do I need for the front and rear without modification???
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Old Jan 17, 2010 | 12:27 AM
  #2  
bowtiejoe's Avatar
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Junior Member
 
Joined: Aug 2009
Posts: 30
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From: NORTH JERSEY
Car: 68 CAMARO, 05 VETTE, 90 IROC
Engine: 327,LS2,305TPI
Transmission: TH400,STOCK,5 SPEED
Axle/Gears: 373,STOCK,342
Re: Need help with brake size!!!

Anyone?
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Old Jan 17, 2010 | 06:43 AM
  #3  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Need help with brake size!!!

Below.

JamesC

Last edited by JamesC; Jan 17, 2010 at 06:46 AM.
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Old Jan 17, 2010 | 06:45 AM
  #4  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Need help with brake size!!!

Originally Posted by bowtiejoe
I got a 1990 Iroc Z, LB9,MM5,G92,J65. I bought cross drilled rotors over the internet and specified my exact car but recieved 1LE rotors and pads. My question is, are the stock rotors on the front of my car 10.5"? and the rear rotors that came in also look slightly bigger, did 1Le's also have bigger rear discs? The ones they sent me are fronts 11 55/64" and rears 11.5". What size do I need for the front and rear without modification???
Fronts are single-piston Delco-Moraine iron calipers with 10.5" rotors (82-92 unless the car was truly a 1LE). The rears, 82-88, are the same as the above; however, 89+ rear disc cars have single-piston PBR alum calipers and 11.7" (or so) rotors. This latter is the so-called 1LE, but all J65 cars in that timeframe were equipped with them.

JamesC

Last edited by JamesC; Jan 17, 2010 at 06:49 AM.
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