Which mastercylinder was used on 1LE Camaro, RPO code ?

Where can I find as much infos as possible about 1LE Camaro ?

Want to switch my front brakes to 1LE or C4 .



1985 IROC, double airsnorkel, Edelbr.mfld. LG-4 dyno HP 193, Flowmaster catback, no cat, T-top, sbfc, Eibach-Pro

 

mastercyliinder should be the same

it's the calipers, spindles and rotors that are different i think.

 

Nothings changed, same as all 4 wheel disc brake cars.
rpo is 1LE.

 

As long as your 4 wheel disk brake car has 12" front rotors and PBR 2 piston calipers.

I wanted to clarify this post. I was looking at the post above me and reading it to say that the 1LE was just the 4 wheel disk brake kit that any 4 wheel disk brake car had (it's not). After re-reading, it looks like he meant that the master cylinder is the same (it is). So, I apologize for the misunderstanding and wanted to clarify my post.

 

Hi there

I do have the original 10.8" brakes and I was told that the C4 or 1LE will definately improve braking, but I was also told that I need to change my mastercylinder.

Is it cuz of 1 to 2 piston calipers ?

 

The master cylinder remains the same, However; a lot of items and money are required for a front brake change to the ones you mentioned.

 

Well,

I am still a bit confused, why do some Camaro drivers tell me this is a must and some tell me it is not.

What kind of mastercylinder is the J-50 option using which I was told to use instead mine J-65 ?

 

Odd as it is, the the important thing here is what rear brakes you have. The 1LE setup used the same master cylinder as the drum rear cars. So, it your car was originally equipped with rear drums, you can reuse your factory MC. If you have factory rear disc, you will need to swap over to the drum rear MC.

More info on the 1LE cars can be found here: http://www.thirdgen.org/newdesign/tech/techdb.shtml More detailed info can be found by searching those boards.

98+ F-body, C4 Corvette, and C5 Corvette brake swap info can be found on that board as well.

 

I do have rear disc brakes, which was the J-65 option and I was told the same as you mention, that the 1LE were using the rear drum mc.

What confuses is, the 1LE also have 4 wheel disc brakes, right ? All I know is that a 4wheel disc brake system works different than the disc/drum so will changing the mc really work ? A mechanic overhere told me the mc from a rear drum system has to be modified to work with 4 disc.

 

Generally when you change from drum to disc you have to install a proportioning valve to keep the rear brakes from locking up.

 

I don't change from drum to disc, from disc to disc but bigger rotor size and bigger calipers.

Hope I will find all the info @ thirdgen.org

Thanks

 

I'm starting to believe that's a myth someone started when they had other problems in their brake system and blamed it on that. I've done the rear drum to disc swap and reused my master cylinder and prop valve. Brakes work great. I've seen dozens of other cars, mostly thirdgens and fox stangs, that have done the same with no problems. It might have to do with the fact that no thirdgen with drum rear brakes ever came with a prop valve (like most modern cars) They have a combination valve, which incorporates the metering block and prop valve. In some older cars, these were separate, and might be the source of your statement.

 

Just a point, when I changed over from a drum brake 10-bolt to a disc PBR 9-bolt all that I change were the proportioning valve and parking brake cable (and some minor fitting changes). Everything works great.