tooquick260 Posted May 31, 2013 Share Posted May 31, 2013 Ok, I have completed this install and it was not to difficult. Straight up by using the adapter/conversion made by gsxtcy here on the forum for the front caliper and rotor. For the rear I used Techno Toy Tuning. Both are straight forward installs. I also installed the Brake Master Cylinder and booster from the 93 300zx. Little modification to get the Booster in but not to difficult. I originally had the one way valve installed backwards on the booster. Made for a firm pedal and felt like you wouldnt be able to stop the car. So, switched that and now there is assist and boy does it boost. Problem is the brakes work to good. What does that mean. There is about an inch of free pedal then the brakes grab hard. Something I have gotten used to and can drive the car with out putting my face thru the windshield. But wandering if there is a way to get some more modulation. I think it is being over boosted. From what i have read this booster is a dual boost. Something about its boosted on both sides. Once depressed then the disc actuates the pressure on the part that boosts the braking. Well I know I am not totally clear but what can I do or is this what i have and live with what I got. I am not one to leave things alone so.... Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted May 31, 2013 Share Posted May 31, 2013 I'm pretty sure that's generally how they feel. My friend has them on his 240sx and it feels the same way you describe it. Possibly a prop valve can help. Quote Link to comment Share on other sites More sharing options...
tooquick260 Posted May 31, 2013 Author Share Posted May 31, 2013 Man they work really well as far as stopping. It will be interesting in the rain. Because when they hit they hit hard. Quote Link to comment Share on other sites More sharing options...
tooquick260 Posted May 31, 2013 Author Share Posted May 31, 2013 Could it be the pedal ratio? If so how do you change the ratio? Does anyone know the ratio of our brake pedal? I guess I could get under there and try to figure it out. Quote Link to comment Share on other sites More sharing options...
Domzs Posted May 31, 2013 Share Posted May 31, 2013 My Z32 does that , it's normal . Quote Link to comment Share on other sites More sharing options...
xtreme_240z Posted June 1, 2013 Share Posted June 1, 2013 Could it be the pedal ratio? If so how do you change the ratio? For the pedal ratio I'm not sure what it is factory. Although on our 240 we eliminated the booster and went with a WillWood master only. The ratio we needed was I believe 7:1. We just took the pedal off and drilled a new hole around 1/2 inch above the original one witch gave us a good ratio and I don't have any issue with brakes locking up. Quote Link to comment Share on other sites More sharing options...
tooquick260 Posted June 1, 2013 Author Share Posted June 1, 2013 So with the mointing hole raised and the ratia must be larger you get a quicker press of the rod in the master cylinder. So if I lower mine I would get a slower activation of the rod going into the master cylinder. Less of a ratio. Quote Link to comment Share on other sites More sharing options...
xtreme_240z Posted June 1, 2013 Share Posted June 1, 2013 So with the mointing hole raised and the ratia must be larger you get a quicker press of the rod in the master cylinder. So if I lower mine I would get a slower activation of the rod going into the master cylinder. Less of a ratio. I'm not sure if it works like you say. But maybe find out what the pedal ratio or the year of z your booster belongs to. Then see if changing your pedal to that ratio if it works better. We got rid of our booster for reason like this Quote Link to comment Share on other sites More sharing options...
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