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Showing results for tags 'brake'.
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Hello Guys, first post and straight a brake thread - I`m sorry, but I read hours on hours in the FAQ section and in a lot of other brake related threads but couldn't find anybody who has done this. So on the weekend I bought a 78 280Z and I´d like to go down the performance road while still keep it kinda periodic correct so I don`t get problems with TÜV in germany and a historic licence plate. So the car will get fully striped down, an exterior backdate to 240z, suspension upgrades, fender flares, exhaust, maybe tripple weber (have to inform myself a bit more on that vs EFI) etc. etc. A lot of people go straight to a rear disk brake conversion and complain about the brake bias and sometimes even damaged axels due to a different load on them compared to drums. Basically thats not what I wanna do plus the TÜV thing mentioned above. But what about keeping the drums in the rear, change the front to S12W and go with a 15/16 master. If I`ve seen that correctly thats what they did back in the day with the original FIA brake upgrade out of the competition catalog. They just went with 13/16 wheel cylinders inside the drums. (not sure about the mastercylinder with FIA brakes...) I just can`t find the size of the original cylinders inside the drums... Somebody did that conversion here in the forums? Is it working well with the original proportion valve or is a manual one capable of dialing in a proper brake bias? Probably have to run a couple calculations to find out (which seems not that easy with drums). But as of the drums are able to create a higher brake force with less hydraulic input they should work better as a rear disc conversion. What do you think? Any help or experience is welcome -
As the title states, looking for a 79-81 brake master cylinder. let me know if you have a spare lying around. thanks!
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Hey HybridZ crew! So I finally decided that after upgrading nearly every other component on the chassis of my Datsun, and a couple really lack luster performances, it was time to do the brakes! I was suitably frustrated with their lack of grab that I started to look into other options. Since this is primarily an auto-x car, I wasn't too concerned with heat dissipation and brake fade like on a serious wheel to wheel machine, and I was more concerned with keeping my weight down. Here's the car, zooming around at Nissanfest this year at Evergreen Speedway. With those factors in mine I went shopping and settled on the Silvermine Motors "Small" wilwood kit. It has the forged 4 piston Dynalite calipers up front and the billet 2 piston dynalite in the rear and traditional drilled and slotted rotors, rather than 2 piece rotors The kit also comes with all the lines needed to connect to the factory fittings. It even has the little retaining clips that always shoot off and get lost under work benches when you pull the stock lines! Edan at Silvermine was excellent to work with and guided me in the right direction on a couple things. Fastest shipping I've ever had on a part. Think he put them in the mail Thursday afternoon, and I had them in my hands on a Monday! Boxes contents all laid out! Well packaged, and everything in its place! Comes with some awesome 10.9 grade hardware, the only bolts you reuse are the front brake caliper bolts, which hold on the new brackets. Really well made and well thought out kit. The rear install is a breeze, once the drum backing plates are out of the way, and the ebrake cables are gone! Hey, its dead weight right? Since the Silvermine kit uses a 3 bolt rear bracket, I didn't need to pull the whole rear assembly apart, so I just turned the rear drum plates into pizzas! Just cut to the bolt holes and then flex them a few times, and they snap right out. The whole rear install probably took about 40 minutes start to finish. For my method, you don't need any really crazy tools or huge breaker bars, just a reasonable quality angle grinder! You could absolutely take the stub axles out (and it would be a perfect time to do rear wheel bearings) if you wanted to keep sparks to a minimum. Part of me wanted thought to see if it was possible without removing the axles, which makes this job MUCH less of an endeavor. The caliper mounts at the 10 o'clock position, keeping its minimal weight inside the axle line of the car. The front kit goes on super nicely. Remove and save the caliper bolts, and then remove the hub/rotor assembly. Why Datsun did it this way is a mystery to me, but oh well. I wire wheeled the mounting surface on the hub and the rotor, as well as chamfered the mounting edge of the bore on the rotor to ensure a solid mount. Bolt the hub back together and then put your new rotor on! Bleed and you're done! Overall impressions, these were really well made, I give them 2 wrenches out of 5 for installing. Depending on how you decide to remove your drum backing plates, it goes up to a 3 or 4 out of 5, particularly for a new to Datsun mechanic. I'm racing the car this weekend, so hopefully I'll have developed an opinion about the brakes this time next week! -
From the album: New Parts
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Hi everyone, HybridZ is really where I come when I'm at a complete loss and everything I've tried hasn't worked. I'm going to be as detailed as possible so bear with me, I'll try to keep it concise. A few weeks back, I replaced the passenger side rear suspension assembly- everything from the control arm to the shock insulator. The driver side had already been replaced as it was previously damaged in a crash around the spindle area. At this point both sides of the suspension are from a later 280z. When I was adjusting the drums, the flathead I was using slipped and bumped the rubber boot of the wheel cylinder and a little fluid oozed out. Guess that explains my inconsistent brake pedal. I wasn't drastically losing fluid or anything, but it must have been a small leak that would occasionally rear its head and my pedal would be just a bit softer than usual. I grabbed an extra wheel cylinder I had that looked like it was in good shape and replaced it. That's when the trouble really started. I stripped the brake line bolt and the wheel cylinder threads. Bit the bullet and ordered a brand new wheel cylinder... cheap and not a bad thing to replace while I'm in there. I also got pre-flared brake line to replace the OEM one I messed up. I made sure it was Japanese style brake line- double flare and 10mm bolts. I "rented" a tube bender and shaped it as close to the OEM one as I could. I ended up with a 30" line as it was either 20" or 30" and I figured it was better to be a bit long than a bit short. Replaced the wheel cylinder, bolted the line up, made sure it didn't leak and didn't hit anything with the car lowered, and bled the rear brakes. Here's where I may have gone wrong- my understanding is the front and rear circuits are separate so leaving the fronts alone I only bled the rears at first. Finished the rest of my work and finally was ready to drive my car after not doing so for several weeks. I could tell immediately something was off. The pedal practically went to the floor right away but I could pump it and build up pressure. Ok, air in the lines or drum is adjusted way too loose. Checked both drums and they're tight but rotate as much as I want them to. Must be air in the lines still. Bleed the rears again and retry but it feels exactly the same. I think I bled my rear brakes about 4 times, then bled the front and rears, then bled the master cylinder, rebled the rears, and the pedal never felt different. On a recent endeavor to bleed the rears for god only knows-th time, the passenger bleed screw snaps in half inside the wheel cylinder. Fair enough, now I can have two new wheel cylinders. Again, cheap insurance. Replaced it, bled the rears again, and the pedal still feels the same. I get very light braking on the first push, but if I pump it quickly I get normal feeling brakes. Today I attempted to bleed the rears yet again. I bought a simple vacuum bleeder to do it myself. I'm a bit stumped because the driver side wheel cylinder just doesn't seem to want to bleed. I recruited someone to hop in and push the pedal so I could get a better view of what's going on. I crack it wide open and it seems like fluid is barely moving through it. On top of that, the pedal feels normal with the bleeder open and seems to build pressure better than with it closed! Is my cylinder bad? Am I going insane? To quote Zoolander... "I feel like I'm taking crazy pills!" I have a turbo motor waiting and this is really the one thing standing in the way. SOS!
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has anyone installed Rx7 brakes?
andyhorror posted a topic in Brakes, Wheels, Suspension and Chassis
Was helping a buddy at the shop with the brakes on his lsx rx7, when i picked up one of the calipers. WOW are they light. all aluminum four piston fixed caliper and they're cheap at 35 a piece. so i was wondering if this would be another budget upgrade option. after some looking seems to be a fairly popular upgrade for the ae86 guys. im a long ways off from brakes but i wanted to put this up to see if anyone had opinions. -
So my 240z has 79 280zx master cylinder, 4-piston calipers with z31 vented rotors up front with perfomance friction pads, and rear has 240sx calipers with akebono pro-act pads and z31 rotors. My problem is the front brakes lock up too easily and I can't stop well at autocross. Has anyone tried a more aggressive autox hawk pad in the rear to help with balancing and have more friction and grab in the rear? Any experience with this? I also saw a mustang kit from silver mine motors. but these won't clear my 14" rally rims. What do you think about trying the pads, or is that a waste of time? Thanks! -
I have a 76 s30 280z with the toyota 4 piston calipers installed up front and stock drums in the rear. I just installed a used 81 s130 280zx brake master cylinder and booster. Both bmc and booster were taken off a junkyard 280zx. The install was pretty easy and straight forward. Just had to take off the spacer and flip the booster and everything bolted up fine. I have bled the brakes in the proper order but there is a problem. The brakes don't work. Basically with the car off the brake pedal builds no pressure. The pedal is spongey about 3/4 of the way down and then super loose at the last 1/4 When the car is on there is absolutely no pressure or resistance or anything. The pedal just goes straight down to the floor with no effort. The brakes don't even work a little. From what I can tell there are no leaks. I read it might me be a push rod issue or brake pedal linkage? Any other suggestion on what the problem might be?
