Globalinx

Does anyone successfully autocross their GS with LS calliper conversion? I recently installed the LS 4 piston brake system, but not even in to the second lap, a calliper sprang a leak. They were freshly rebuilt by what supposed to be a reputable company . I autocrossed on my stock GS callipers without ant issues. What gives? Are LS callipers not designed for high heat and constant load, and only good for 4 seconds in case of an extreme emergency?

RA40

iTrader: (6)

I replied in your other thread as well.

Thinking how Toyota is, I'm sure that they tested the car and found the caliper reasonable for an extreme condition which a daily commuter might encounter, not just one or two hard stops.

In general, I would say they may not take the constant loading a tracked car will get. Have another go and if a seal blows out, a more appropriate caliper will be needed. Or the calipers you acquired have some problem, as in rebuilt improperly by the prior owner/ruined so it may no longer be OEM spec'd for the seals.

GSteg

iTrader: (15)

My guess is that something happened during the rebuilding process. Whether it is due to cheap seals or improper installation, I don't know, but the LS400 calipers should withstand autocrossing. OEM calipers are built with high safety factors. I've stomped on my brakes multiple times within a very short period of time and mine has not sprung a leak.