1LE brakes

200KSS

Frequent Racer
May 27, 2003
534
0
16
Southeast Missouri
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.
 

LS6 Tommy

MalibuRacing Junkie
May 15, 2004
15,847
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North Jersey
malicad said:
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
 

t5montecarlo

MalibuRacing Junkie
Oct 21, 2007
4,632
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Lederach, PA
garage-scene.com
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

Daily Driver
Jul 15, 2007
48
0
0
New Berlin, Wisconsin
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.
 

LS6 Tommy

MalibuRacing Junkie
May 15, 2004
15,847
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t5montecarlo said:
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
 

godlemmy

Member
Nov 24, 2010
10
0
0
cleveland,oh
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.
 

LS6 Tommy

MalibuRacing Junkie
May 15, 2004
15,847
1
38
North Jersey
12" rotors with a front caliper is WAAAY too much rear brake...

Tommy
 

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