hybrid_vtec

Does anyone know the caliper piston size for a 92 Civic Si? I am upgrading the front brakes with prelude calipers. I am trying to calculate for the increase in piston size so I can correctly determine what size master cylinder to upgrade to. I have read too many times that a 13/16th's isnt enough, and a 15/16ths/ 1" MC is too hard to get to brake(you have to use more effort).


I have search HT all over, and could not find this measurement. I did find out that the Prelude calipers are 57mm pistons.

pdiggitydogg

Honestly, I didnt think the prelude caliper bolted up to the knuckles of the civic/integra.

But if you are upgrading to a 57mm piston, there is no issue with a 1" cylinder at all.
I actually ran a 1" mc with the same sized calipers as your si, and it was firm (absolutely) but it was not "too hard" by any means. Very driveable, if not requiring some time to get used to

Oh, and I dont remember the size of the ex/si caliper pistons...

keemosaki

if your gonna upgrade with the same 4x100 rotor, you gots to use a GSR, integra LS/RS
prelude rotor will *** everything up. dont try

Targa250R

If you're going to be using 17CL15VN calipers, you're going to want at least a 15/16" MC. Those cars come stock with 1" MCs IIRC.

finch82

i have a 92 si eg and the brakes are different than the ex ...but they are the same size as 91 crx si...your best bet is to upgrade the entire knuckle go with either a ex or integra setup your options to upgrade those pistons can get pretty sick..

Targa250R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by finch82 &raquo;</TD></TR><TR><TD CLASS="quote">i have a 92 si eg and the brakes [...] are the same size as 91 crx si</TD></TR></TABLE>
The rotors are the same size but the front calipers are different. The '90-91 CRX Si has a beefier front caliper (16CL13VN) with a larger piston. It also has a larger master cylinder (7/8" vs. 13/16") and a different proportioning valve.

hybrid_vtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by keemosaki &raquo;</TD></TR><TR><TD CLASS="quote">if your gonna upgrade with the same 4x100 rotor, you gots to use a GSR, integra LS/RS
prelude rotor will *** everything up. dont try</TD></TR></TABLE>

HUH???