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1LE brakes

Questions, answers, tips and tech on wheels, tires and brake issues

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200KSS
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Re: 1LE brakes

Post by 200KSS » Wed Sep 19, 2012 8:37 am

What master cylinder is everyone using? I did this swap in 2003 and upgraded to a larger master cylinder as well which really helped pedal feel, but I can't find the p/n. Ready to do the swap on another car.
88 Monte SS: Black/maroon. Power Tour cruiser.
80 Malibu 2dr. Gold/saddle. 406/2004R/GN rear. Drag Week Survivor.

zx809
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Re: 1LE brakes

Post by zx809 » Wed Sep 19, 2012 3:57 pm

anyone know the rpo code in the glove box for the 12 inch brake package on 78-90 full size chev cars

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LS6 Tommy
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Re: 1LE brakes

Post by LS6 Tommy » Wed Sep 19, 2012 8:46 pm

malicad wrote:All you need are spindles from those years of a Caprice. Period. Doesn't have to be a wagon.
But they do have to be for 12" brakes...

Tommy
20k mile '80 Malibu, currently undergoing long term (aka no money) factory style install LS6 454, Cowl Induction, Legend LGT 700 5 speed. Full Global West suspension, 17" N90 wheels, 12" front/11" rear disc brakes, 9" 3.70 Auburn Pro posi.

"The older I get, the faster I was"

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t5montecarlo
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Re: 1LE brakes

Post by t5montecarlo » Wed Sep 19, 2012 9:04 pm

The RPO is 9C1

I know 3 people who did this swap and each used different master cylinders:
1988 9C1 B body aluminum; 1-inch bore
stock 15⁄16-inch bore
Raybestos B body (JMC39328); 1⅛-inch bore

PaulB23
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Re: 1LE brakes

Post by PaulB23 » Mon Jan 07, 2013 11:09 pm

I did the 1LE swap back in 2002 and swapped in a late 80's era b-body master and booster. Made a huge difference too.
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rwolf15241
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Re: 1LE brakes

Post by rwolf15241 » Fri Feb 15, 2013 7:11 pm

I have them on my El camino, stops on a dime, I also have the lower tubular arms
1986 El Camino
IROC Body Kit
LS3 Crate Engine / 6 speed
Rob
Pittsburgh, PA 15241
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412-638-2639

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LS6 Tommy
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Re: 1LE brakes

Post by LS6 Tommy » Sun Feb 17, 2013 12:05 pm

t5montecarlo wrote:The RPO is 9C1
You can't use 9C1 spindles. The ball joint taper is wrong. You need tow package car 12" rotor spindles.

As per Global West:

"Tech tip: If you are looking for 12 inch discs off of a donor car, do not use police or taxicab spindles. The lower ball joint tapers are too big and will not work. The ball joints for those vehicles can not be machined down to fit your control arm either.

The following lists of donor cars are used for GM tall spindle conversions. This conversion, in conjunction with our tubular upper control arms, changes the geometry curve and creates a negative camber curve. We highly recommend the system if you are looking for superior handling. They are not used for drag racing applications.

Donor cars with tall spindles and 12 inch disc brake rotors:

Buick full size: LeSabre wagon/Electra wagon 77-94

Cadillac Fleetwood/Deville 77-84 Brougham/Fleetwood 85-94

Chevy full size: Bel Air/Biscayne/Caprice/Impala 77-96

Olds: 98/Delta88/Delta 88 wagon 77-92

Pontiac full size: Bonneville/Catalina/Grandville 77-86

Important: There are two different types of 12 inch disc brakes spindles. One version uses a small outer bearing measuring .750. The second type uses a larger outer bearing measuring .850. Use the larger diameter outer bearing spindle because the rotor you are going to need is off a 1988-92 1LE Camaro/Firebird GM part #18016035. These rotors have the correct bolt pattern 5 on 4 3/4 bolt circle, however the rotors use 12mm studs rather than 7/16 studs. You need to change the studs over to 7/16. We use a DBS-42 kit for this conversion."


Tommy
20k mile '80 Malibu, currently undergoing long term (aka no money) factory style install LS6 454, Cowl Induction, Legend LGT 700 5 speed. Full Global West suspension, 17" N90 wheels, 12" front/11" rear disc brakes, 9" 3.70 Auburn Pro posi.

"The older I get, the faster I was"

godlemmy
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Re: 1LE brakes

Post by godlemmy » Sun Feb 24, 2013 8:37 pm

if you just want to upgrade to bigger brakes,why not use the 98-04 4x2 s10 blazer spindles and brakes? bigger rotors and dual piston calipers.if you want bigger that the stock blazer the ls1 f-bodys and even corvette rotors and calipers work with the blazer spindles by changing the caliper mount.i understand the taller spindle/negative camber deal.i thought the OP wanted bigger brakes on a budget.

rwolf15241
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Re: 1LE brakes

Post by rwolf15241 » Thu Mar 07, 2013 9:08 pm

Anyone do the rear LE Brake swap on a Ford 9 inch??? I need info on brackets before I order the rear!!
1986 El Camino
IROC Body Kit
LS3 Crate Engine / 6 speed
Rob
Pittsburgh, PA 15241
rwolf15241@yahoo.com
412-638-2639

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LS6 Tommy
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Re: 1LE brakes

Post by LS6 Tommy » Fri Nov 01, 2013 6:42 am

12" rotors with a front caliper is WAAAY too much rear brake...

Tommy
20k mile '80 Malibu, currently undergoing long term (aka no money) factory style install LS6 454, Cowl Induction, Legend LGT 700 5 speed. Full Global West suspension, 17" N90 wheels, 12" front/11" rear disc brakes, 9" 3.70 Auburn Pro posi.

"The older I get, the faster I was"

zx809
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Re:

Post by zx809 » Mon Oct 12, 2015 2:02 pm

LS6 Tommy wrote:Here ya go:

Spindles and calipers are from 78-90 12" rotor (not 11") full size Caprice, Caddy, Delta 88, and Pontiac. Typically wagon or HD towing package.

Brake calipers, (1)#18-4021, (1)#18-4020

Brake flex hoses, #BH36848

Brake caliper hose bolts, #483-205

Brake pads, # D52

Brake rotors, 1LE, #5994

Wheel bearings, 1LE inner, #BR6

Wheel bearings, 1LE outer, #BR3

Bearing seals, 1LE, #19753

Hub grease caps, 1LE, #13977

Tommy
What are these part numbers from gm or napa or a different manufacturer??

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LS6 Tommy
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Re: Re:

Post by LS6 Tommy » Wed Oct 21, 2015 5:50 pm

zx809 wrote:
LS6 Tommy wrote:Here ya go:

Spindles and calipers are from 78-90 12" rotor (not 11") full size Caprice, Caddy, Delta 88, and Pontiac. Typically wagon or HD towing package.

Brake calipers, (1)#18-4021, (1)#18-4020

Brake flex hoses, #BH36848

Brake caliper hose bolts, #483-205

Brake pads, # D52

Brake rotors, 1LE, #5994

Wheel bearings, 1LE inner, #BR6

Wheel bearings, 1LE outer, #BR3

Bearing seals, 1LE, #19753

Hub grease caps, 1LE, #13977

Tommy
What are these part numbers from gm or napa or a different manufacturer??

Those are Hollander Interchange numbers. Industry standard part numbers. You should be able to use them to cross refrence with any manufacturer's numbers.

Tommy
20k mile '80 Malibu, currently undergoing long term (aka no money) factory style install LS6 454, Cowl Induction, Legend LGT 700 5 speed. Full Global West suspension, 17" N90 wheels, 12" front/11" rear disc brakes, 9" 3.70 Auburn Pro posi.

"The older I get, the faster I was"

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