When I had my drag car I had stock v8 springs in the back and an air bag in the right spring ... Most I ever run was 15 p.s.i. in it and could tell a differnce in how it left the line and in my 60 ft times as well. As far as max pressure I woudl wait and see what everyone else says.
Bradley
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1990 GT, 347, TFS TW Heads, TFS Cam, TFS Track heat, Twin turbos, FMIC, T5.
Built Ford Tough Moderator
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