GS calipers

[garyhugo]

I'm putting the '96 GS front calipers on my '90 ZR-1. Does anybody know if they use the same size pads? How about brake lines? I've noticed that '93 and '94-'95 lines have different part numbers. What lines would I need to use with these calipers and whats different?

[ZZZZZR1]

Gary


Pretty sure the GS calipers are idential to J55 (stock 1990 to 1995 ZR-1 calipers).

:cheers:

David

[WVZR-1]

I'm putting the '96 GS front calipers on my '90 ZR-1. Does anybody know if they use the same size pads? How about brake lines? I've noticed that '93 and '94-'95 lines have different part numbers. What lines would I need to use with these calipers and whats different?

The pads are the same and I've never seen someone mention a problem with the hydraulics. I'd use the hydraulics for the MY of the car. There is a difference in the hoses. The later hoses have a 90* tube and then the banjo and the early has a wedge at the end of the rubber for the banjo with no tube. Did you buy new braided lines? VB&P it seems has the incorrect image on their web-site for the early and have been shipping the later MY lines. Does it make a difference? Don't know.

You have new banjo washers?

[Kevin]

I have the GS calipers on my car, got them from DRM and they have SS pistions and I replaced the lines with SS lines. really happy with how the brakes feel now.

[lbszr]

I have the GS calipers on my car, got them from DRM and they have SS pistions and I replaced the lines with SS lines. really happy with how the brakes feel now.

Last summer DRM didn't have stainless pistons for the J55. Do you know if the J55 and GS cal. use the same piston?

[lbszr]

I'm putting the '96 GS front calipers on my '90 ZR-1. Does anybody know if they use the same size pads? How about brake lines? I've noticed that '93 and '94-'95 lines have different part numbers. What lines would I need to use with these calipers and whats different?

I liked the way DRM stainless lines fit if you go that route, but I don't have GS.

[WVZR-1]

Last summer DRM didn't have stainless pistons for the J55. Do you know if the J55 and GS cal. use the same piston?

Pistons are the same '88 - end of production! Pistons are 1.50 for the fronts.

I just looked at the DRM line package and the difference with DRM and the others is the DRM is NOT orientated to the rail on the caliper but just uses an adapter to take their lines to the fitting in the caliper. It does NOT use a banjo. I think I'd prefer the banjo but does it make a difference? Don't know.

[garyhugo]

I havn't ordered the lines yet. Wanted to make sure the 90 lines would work with the GS calipers. Do I need to order new banjos also. Whats the recommendation for stainless lines on a '90 with GS calipers?

[Kevin]

Last summer DRM didn't have stainless pistons for the J55. Do you know if the J55 and GS cal. use the same piston?

i bought them as a set years and years go. I don't know, sorry

[GOLDCYLON]

I'm putting the '96 GS front calipers on my '90 ZR-1. Does anybody know if they use the same size pads? How about brake lines? I've noticed that '93 and '94-'95 lines have different part numbers. What lines would I need to use with these calipers and whats different?

The pads are 100% the same as your stock J55s

[lbszr]

Pistons are the same '88 - end of production! Pistons are 1.50 for the fronts.

I just looked at the DRM line package and the difference with DRM and the others is the DRM is NOT orientated to the rail on the caliper but just uses an adapter to take their lines to the fitting in the caliper. It does NOT use a banjo. I think I'd prefer the banjo but does it make a difference? Don't know.

The DRM fittings tighten to the caliper using a crush gasket like the banjo's, so once they are installed to the caliper, the lines can be removed and reinstalled from the fitting/caliper with no seals needed cause they are flared AN style. The lines can be capped so the resevoir doesn't gravity empty with an AN plug if the calipers have to come off for maint. (but those orange ear plugs worked somtimes with the banjo's)

As you mentioned, they're not orientated like the banjo's. So they do need to be tightened with no twist.

[lbszr]

I havn't ordered the lines yet. Wanted to make sure the 90 lines would work with the GS calipers. Do I need to order new banjos also. Whats the recommendation for stainless lines on a '90 with GS calipers?

DRM would know for sure if their stainless would fit.

The main reason I went to stainless was cause I was hearing about too many people at the road tracks having the rubber ones blow out of the swag end, probably from heat, so I don't think it's an issue on the street. Probably more about whether you want it to look original or not.

[GOLDCYLON]

Most of us, daily drivers included have already upgraded the brake lines, oil cooler lines etc because its a smart mod to do. I wish GM had done the same during production like the rest of the stainless lines already in the engine compartment. Reguardless thats what Aftermarket business are all about filling the void.

Nice upgrade. SS is always the WTG. GC :cheers:

[Hib Halverson]

96 GS calipers bolt on, have the same piston dia and use the same pads as OE 90-95 ZR1.

GM told media prior to the 96 going on sale that the GS brake caliper was more robust in the caliper bridge area and, thus, spread less when high loads occured to to heavy braking.

I've never been able to ascertain if that's true, but the GS calipers look stronger and that's why I have a set of them on the front of my 95.