zguy36 Posted September 5, 2005 Share Posted September 5, 2005 I am wondering if anyone else has this problem. Car info is: '73 240z, 280zxt motor toyota front brake upgrade 280zx rear upgrade The passenger side front tire is the first to lock up causing very uneven braking. Is this due to a poor weight distribution in the front of the car. The intake, exhaust, turbo, driver are all on the same side which seems like it would be much heavier than the passenger side and to be causing me this problem. -jeremy- Quote Link to comment Share on other sites More sharing options...
JMortensen Posted September 5, 2005 Share Posted September 5, 2005 Sounds like you have a stuck caliper to me. Quote Link to comment Share on other sites More sharing options...
zguy36 Posted September 5, 2005 Author Share Posted September 5, 2005 Calipers are all brand new. I had this same problem with the stock setup as well (different calipers, same problem) Quote Link to comment Share on other sites More sharing options...
Clifton Posted September 5, 2005 Share Posted September 5, 2005 Warped rotor? Check it with a dial indicator. Quote Link to comment Share on other sites More sharing options...
zguy36 Posted September 5, 2005 Author Share Posted September 5, 2005 The entire setup is all brand new. I would be able to feel a warped rotor in the pedal (ie, pulsation or steering wheel shimmy) Go out and stomp on your brakes and see if you have this problem as well. Quote Link to comment Share on other sites More sharing options...
AK-Z Posted September 5, 2005 Share Posted September 5, 2005 check pad wear. have you swaped out the brake portotion valve? Might want to check the stock one if you haven't. Quote Link to comment Share on other sites More sharing options...
zguy95135 Posted September 5, 2005 Share Posted September 5, 2005 Sounds like the proportioning valve could be the culprit. BTW There is only enough room for one zguy!!! j/k Quote Link to comment Share on other sites More sharing options...
johnc Posted September 5, 2005 Share Posted September 5, 2005 Is the RF brake locking up easily or it just the brake that locks up just before all the others do? Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted September 5, 2005 Share Posted September 5, 2005 Check your tire pressure first. Quote Link to comment Share on other sites More sharing options...
zguy36 Posted September 6, 2005 Author Share Posted September 6, 2005 I feel like an idiot for no thinking of this first before even putting up a post. The problem has nothing to do with the brakes. As I said before, all new parts, nothing broken. The prop. valve is out of the question since only one of the front lines goes through the valve and the line that does go through the valve has too much braking force. Prop valves limit rear pressure anyway. So actual problem Misadjusted coilovers. I didn't notice this problem before since I usually drove with a heavy (250lb) passenger. He evened out the weight distribution. solution Adjust the passenger side coilover to apply more weight on that wheel, until braking is even. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted September 6, 2005 Share Posted September 6, 2005 That's pretty weird dude. I've run MANY track days and autoxes with passengers and never noticed the right front locking first. BTW when I first put my car on scales I had set the height by fender height only. On the scales with me in the car I got the following: LF 640 -- RF 620 LR 650 -- RR 640 I don't know what those numbers would have been like with a 250 lb passenger, but like I said the car was set with EVEN fender heights and that's the corner weights I got. Quote Link to comment Share on other sites More sharing options...
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