put a bigger master cylinder then the original on???

 

What kind of car? The J65 (4 wheel disc, 82-88) master cylinder has a larger bore than the J50 (disc/drum for 82-88, then used for all brake systems in 89-up). This translates to a "harder" pedal effort.

 

It is an 87 IROC with 4WD. Would an A or G body car have a bigger master clyinder? Would it work with our cars?

 

An 87 IROC with 4 wheel drive.... hmm interesting

J/K

Ben

 

Why do you want a bigger master cylinder?

 

We're thinking that the master cylinder is what is causing our IROC to have such spongy brakes. Maybe if we could put a bigger one on there, it would brake better.

 

Almost every brake part on the Camaro is below par. I figure if I'm going to replace the master clyinder then I might as well(there goes that phrase again) put a bigger one on there. I bigger MC would be able to apply more pressure right??

 

No, the properties of hydaulics are inverse. A smaller master cylinder bore/piston will exert more pressure.
At one time GM had issued a "TSB"on the 4 wheel disc brakes on the F-bodies. It stated " that if the customer objected to the firm pedal of the brake system. That they are to install a different master cylinder Part# so-and-so. This replacement master cyliner simply had a larger bore.

Rear my post and all the links about the 1LE upgrade. Their is a lot of good info in there about this subject.

Thanx,ANDYZ28