ezzzzzzz Posted March 19, 2007 Share Posted March 19, 2007 This is too funny. I purchased my 240Z about three years ago and drove it 500 miles to get it home. The brakes were stiff and I accounted that to the old system. Having driven older trucks and cars I am accustom to hard brakes. Well, I almost immediately put the car on jack stands to replace the struts and springs and do some modifications including upgraded brakes. I installed the 15/16 280Zx MC, vented discs/280Z calipers up front and solid discs/240SX calipers out back. Braking improved but pedal pressure was still hard and stiff. I decided to upgrade to the 280Z booster. I 'thought' I percieved better braking but it was still very stiff and hard. Mind you, I only drive this car about 30 miles a month depending on the weather (NO rain). The other day I had the chance to drive a friend's 280Z. This was the only other Z I've ever driven. The difference in compliance and, especially braking, was hugh. The series I and II 240Z's are definately true sports cars. I drove home convinced that something had to be wrong. My friend, Wayne, suggested I look at the vacuum check valve to be sure it wasn't installed wrong. Two days past and I finally got around to it. Sure enough, the valve was backwards from the P.O. and I never checked it out. A quick down the road at speed and I applied the brakes. Holy crap! I almost threw myself into the dash! The damn car nearly stopped in it's own length. It cracks me up that something so simple had eluded me for months on end. Now I wonder how well the original brakes would have performed if that check valve had been installed correctly the first time. Quote Link to comment Share on other sites More sharing options...
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