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Discussion Starter #1
It has a internal solenoid and decided to shim spring some and check this time , because i heard with Bigblocks and 700 hp would need atleast 200psi and was thinking Pa older brake was kinda low on PSI compared to others. I hope 40 thousands wasnt too much of a shim. It seem really to make a differance putting back in.
 

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Discussion Starter #4
Ok , thanks, I know what to shoot for, so i guess i leave in the shim and check it. First time ever shimming and just dont want to blow any seal. :)
 

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The original PR spring is a spring out of a front clutch from a TF727. I offen thought that a direct clutch spring from a TH400 transgo -2 kit would work perfectly. C-4's love 210-220 psi. Typical P/A brake new is 180-190 psi.
 
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