4 piston calipers on a 69??

[DT]

Was a 4 piston caliper ever an option on a 69 SS ??  Thx.

[1968RSZ28]

Was a 4 piston caliper ever an option on a 69 SS ??  Thx.

Only with the JL8 option.

Paul

[BlackoutSteve]

Yes. JL8, which used a larger front (J56 Corvette) caliper than the smaller J52 67-68 calipers.

[DT]

Thanks guys. The J52 caliper was from a 67=68 Z28??

[bertfam]

J52 was the disc brake option for 67 and 68. Required on the Z28, but optional on all the others.

Ed

[william]

Yes. JL8, which used a larger front (J56 Corvette) caliper than the smaller J52 67-68 calipers.

JL8 Camaros used modified standard 4-piston Corvette calipers and 11-3/4" rotors on all 4 wheels, not the heavy-duty dual-pin J56 calipers. J56 is very rare in the Corvette world.

For '67 there was a J56 "heavy-duty brake" option for Z/28. It used the standard Camaro caliper but used different pistons with insulators and metallic rear brake shoes.

J52 is the order code for power disc brakes, a required option on Z/28 for '68-'69 and standard on '69 SS. For '67 only J52 didn't include power brakes; manual front disc brake cars were built but no Z/28s are known. J50 "vacuum power brake" also had to be ordered. '67-'68 front calipers were 4 piston but not the same as Corvette. For '69 the design was changed to single-piston.

[BlackoutSteve]

JL8 Camaros used modified standard 4-piston Corvette calipers and 11-3/4" rotors on all 4 wheels, not the heavy-duty dual-pin J56 calipers. J56 is very rare in the Corvette world.

Ahh, thanks for that. Interesting.
Then I assume that there is no RPO code for the standard Corvette disc brakes. ..because those were standard on all models?
Do you know what the mods made to the standard Corvette calipers were for the JL8 option on Camaros?

[william]

The best source for JL8 info is Wayne Guinn's book "Camaro Untold Secrets 1967-1969." The JL8 chapter is over 30 pages.

The standard equipment '65-up Corvette caliper used a single pin to retain the pads.

To the best of my knowledge the caliper inner halves as used on JL8 were machined differently to relocate the bleeder. I believe they had an X cast into them for ID. Some racers modified the JL8 system to use dual-pin HD Corvette J56 calipers.