Author Topic: Help with rear disc brakes!!  (Read 29882 times)

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Offline mattblack84

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Re: Help with rear disc brakes!!
« Reply #45 on: June 03, 2019, 09:47:16 PM »
I always had what seemed like a low pedal with air in the lines with the stock discs, now its a really nice feel only thing I did was the kit.

Offline Angelo

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Re: Help with rear disc brakes!!
« Reply #46 on: June 03, 2019, 10:50:23 PM »
Right, it is definitely something with the caliper design. I suspect its a combination of the prop valve and the rear disc ratcheting calipers, the prop valve GM part number in the catalogs is very specific, one part number for 79-81 Firebirds. The one prop valve fits all the aftermarket sells I am sure is not exactly tuned how GM intended.

I will know soon if an adjustable prop valve and/or hydroboost makes the brakes behave better.
81' (78 clone), House of Kolor Jet Set Black, Pontiac 400 built by DCI Motorsports, FiTech EFI, Tremec 6 speed, 3.73 rear, YearOne 17" snowflake, Pro Touring F-body GT shocks/springs, hydroboost, factory 4 disc, Ram Air Resto + Thrust transverse exhaust.