MK4A80 Posted January 26, 2021 Author Report Share Posted January 26, 2021 Hi guys, Im the original person that started this thread. So im having issues with my disc brake set up and was wondering if somebody has an idea of what im doing wrong. So i went with the beebani kit and got all the other parts from my local o'reillys. I originally bought the wilwood proportional valve p#: 260-11179. So everything at first work great, but a couple months later, the rear wheels start to lock up. So i check and found everything okay. So i decided to replace the proportional valve with a different one and see if it would make a difference. So i bought the SSBC P#: A0730 valve. I installed and it started to work again. Now again the brake are locking up, but this time the all four wheels lock up. Any one have any idea of what im doing wrong and is it possible to run disc brakes without the proportional valve? I think im not adjusting the valve properly, but if you guys have any ideas please let me know. Thank you, Fredy. 1 Quote Link to comment
Crashtd420 Posted January 26, 2021 Report Share Posted January 26, 2021 31 minutes ago, MK4A80 said: Hi guys, Im the original person that started this thread. So im having issues with my disc brake set up and was wondering if somebody has an idea of what im doing wrong. So i went with the beebani kit and got all the other parts from my local o'reillys. I originally bought the wilwood proportional valve p#: 260-11179. So everything at first work great, but a couple months later, the rear wheels start to lock up. So i check and found everything okay. So i decided to replace the proportional valve with a different one and see if it would make a difference. So i bought the SSBC P#: A0730 valve. I installed and it started to work again. Now again the brake are locking up, but this time the all four wheels lock up. Any one have any idea of what im doing wrong and is it possible to run disc brakes without the proportional valve? I think im not adjusting the valve properly, but if you guys have any ideas please let me know. Thank you, Fredy. What master cylinder are you using? I replaced my master with a dual setup for front disk rear drum.... I'm currently upgrading to rear disk also ... so in order to use my master I have to remove the residual valve from the master... drums have a 10lb residual valve.... and I'm adding this inline externally in place of an adjustable one.... I'm not even sure why I currently have an adjustable one.... 2 Quote Link to comment
d.p Posted January 26, 2021 Report Share Posted January 26, 2021 34 minutes ago, MK4A80 said: Hi guys, Im the original person that started this thread. So im having issues with my disc brake set up and was wondering if somebody has an idea of what im doing wrong. So i went with the beebani kit and got all the other parts from my local o'reillys. I originally bought the wilwood proportional valve p#: 260-11179. So everything at first work great, but a couple months later, the rear wheels start to lock up. So i check and found everything okay. So i decided to replace the proportional valve with a different one and see if it would make a difference. So i bought the SSBC P#: A0730 valve. I installed and it started to work again. Now again the brake are locking up, but this time the all four wheels lock up. Any one have any idea of what im doing wrong and is it possible to run disc brakes without the proportional valve? I think im not adjusting the valve properly, but if you guys have any ideas please let me know. Thank you, Fredy. I run beebani disc brakes without a proportioning valve and have for years. Its not needed AFAIK and if all four are locking up wouldn't that mean their is constant pressure from the master forcing fluid to them and thus engaging the pads and drums? 1 Quote Link to comment
MK4A80 Posted January 26, 2021 Author Report Share Posted January 26, 2021 12 minutes ago, Crashtd420 said: What master cylinder are you using? I replaced my master with a dual setup for front disk rear drum.... I'm currently upgrading to rear disk also ... so in order to use my master I have to remove the residual valve from the master... drums have a 10lb residual valve.... and I'm adding this inline externally in place of an adjustable one.... I'm not even sure why I currently have an adjustable one.... Im running a 1970's 280z master cylinder. I cant recall the year, but according to beebani instructions any year works. 1 Quote Link to comment
MK4A80 Posted January 26, 2021 Author Report Share Posted January 26, 2021 21 minutes ago, d.p said: I run beebani disc brakes without a proportioning valve and have for years. Its not needed AFAIK and if all four are locking up wouldn't that mean their is constant pressure from the master forcing fluid to them and thus engaging the pads and drums? Im on disc all four wheels. What master cylinder you ran, to not need the proportional valve? 2 Quote Link to comment
d.p Posted January 26, 2021 Report Share Posted January 26, 2021 I am disc front drum rear and I don't remember which one I got it was so long ago but I think it was from a 620? 2 Quote Link to comment
Crashtd420 Posted January 26, 2021 Report Share Posted January 26, 2021 4 minutes ago, MK4A80 said: Im on disc all four wheels. What master cylinder you ran, to not need the proportional valve? He's got disk and drum brakes..... 1 Quote Link to comment
Crashtd420 Posted January 26, 2021 Report Share Posted January 26, 2021 Just now, d.p said: I am disc front drum rear and I don't remember which one I got it was so long ago but I think it was from a 620? Probably the same one I got 1 Quote Link to comment
Crashtd420 Posted January 26, 2021 Report Share Posted January 26, 2021 6 minutes ago, MK4A80 said: Im running a 1970's 280z master cylinder. I cant recall the year, but according to beebani instructions any year works. Well if its designed for 4 wheel disk get rid of the proportioning valve and you should be good.... 1 Quote Link to comment
Crashtd420 Posted January 26, 2021 Report Share Posted January 26, 2021 (edited) 27 minutes ago, MK4A80 said: Im running a 1970's 280z master cylinder. I cant recall the year, but according to beebani instructions any year works. I actually wonder if this is some of your issue..... looking up a 76 280z it looks to me like they are front disk rear drum vehicles.... Oh 1970 is a 240z.... Edited January 26, 2021 by Crashtd420 1 Quote Link to comment
datzenmike Posted January 26, 2021 Report Share Posted January 26, 2021 A proportioning valve provides less braking to the rears as they will lock up first because of the lack of weight on the rear tires and weight transfer to the fronts when braking. n some Nissans there is no proportioning valve as the rear wheel cylinders are simply made smaller. My 620 was raised 16" on 33" tires and the weight shift was enormous. It would lock up coming to a stop light. I put an adjustable Wilwood proportioning valve in and cranked it till all tires locked at the same time. If the rears are allowed to lock first the rear end will try to come around. A residual valve is in the outlet of the master cylinder and on drum brake vehicles retains about 10-12 PSI to keep the shoes out slightly against the return springs so they have less distance to travel. On disc brakes this pressure is only 2 or 3 PSI as the pads are already against the rotors. A single master cylinder has the disadvantage of total brake failure if there is a leak anywhere in the system. I would definitely make damn sure my e brake was fully adjusted and functional. If you have a dual master cylinder from a car it's likely disc front and drum rear. If switching to read disc as well get a residual valve (disc) from another master and replace the drum one. Rear brakes locking up after some use is classic drum residual valve on a disc brake set up. It's meant to be 2 pounds not 12. All wheels locking could also be not enough pedal play. The piston in the master is not returning fully allowing brake fluid back into the reservoir and some pressure is trapped in the system. As you use it more and more pressure is trapped. Push down on the brake pedal with thumb and there should be about 1/8" of slack before firm resistance is felt. 1 Quote Link to comment
banzai510(hainz) Posted January 26, 2021 Report Share Posted January 26, 2021 I had this happen to me on my 521. all 4 would build up pressure everytime I hit the brakes. I would get my wrench and relieve the pressure on the rear brake bleed screw. Since a 521 is a single resivoir its obvious that its the Master cylinder. I swapped it out and was ok. only other thing is make sure your master is all the way out on the firewall under the pedal. A lot of time the new Master the threaded rod is actually longer than the stock one and when one bolts it up the pedal arms is already pushing on the pedal when one goes to bolt the master on the firewall. Meaning bolt to long!!!! 3 Quote Link to comment
gene knight Posted January 27, 2021 Report Share Posted January 27, 2021 i'm running disc on front and drums on rear with dual master cylinder on my 1970 521 but i plan on putting rear disc brakes from silvermine motors will i need to change my master cylinder as well or add a proportioning valve? 1 Quote Link to comment
Crashtd420 Posted January 27, 2021 Report Share Posted January 27, 2021 (edited) 6 hours ago, gene knight said: i'm running disc on front and drums on rear with dual master cylinder on my 1970 521 but i plan on putting rear disc brakes from silvermine motors will i need to change my master cylinder as well or add a proportioning valve! You can either get a master that's setup for front and rear disk or change out the residual valve in the master if you have some spare parts.... Or You can just remove the rear residual valve from the master cylinder and install an inline one like I posted from willwood..... Dont get the adjustable type proportioning valve..... Edited January 27, 2021 by Crashtd420 2 Quote Link to comment
datzenmike Posted January 27, 2021 Report Share Posted January 27, 2021 On the adjustable proportioning valve.... It's intended to BE adjustable so you can tune out the locking of the rear tires first. This is especially true if converting to disc rear brakes or altering the system from what Nissan engineers designed to work for you. Also true if lowering you vehicle. A lowered vehicle has less weight transfer to the fronts, off the rears and you may actually be abe to add some rear bias. Obviously you can't just go out an buy a proportioning valve to suit your custom set up. BTW.... adjustable proportioning valves are illegal.... but improved stopping trumps this. Mount out under the hood. I say this because if accessible, you'll fiddle with it for dry, wet and snow conditions. I drove down hard gravel road and applied brakes till they appeared to lock equally by their marks. Once set, resist the urge to mess with this. Get comfortable with it. 2 Quote Link to comment
gene knight Posted January 29, 2021 Report Share Posted January 29, 2021 i do have an adjustable proportioning valve right at where the brass t is bolted to firewall 1 Quote Link to comment
521aiden Posted August 19, 2021 Report Share Posted August 19, 2021 Hi, this brake set up came on my truck, it uses spindle adapters to fit different hubs and uses a similar parts set up to the kit that mike klotz sells, I was wondering if anyone could help me identify it because nothing I have seen seems to match. also if anyone knows where to get another set of spindle adapters to fit the later model 720/D21 hubs i’m interested in those parts. Thanks for the help, Aiden Quote Link to comment
mklotz70 Posted August 19, 2021 Report Share Posted August 19, 2021 (edited) Sorry for the delay.....still working through emails this morning......too busy and tired yesterday to get to it. I'll go find your email and reply. I should have the adapters....if not, I will in a few days. It's definitely my setup. :) I just noticed.....that bracket is for the other side. The tabs go on the inside. Second half of the page..... http://www.bluehandsinc.com/truck-kit-install.html Edited August 19, 2021 by mklotz70 2 Quote Link to comment
JohnnyGold Posted January 28, 2023 Report Share Posted January 28, 2023 On 8/15/2020 at 5:48 PM, Charlie69 said: Hi all! Can anyone tell how thick are these adaptor plates? 10mm perhaps? Thanks in advance! 1 Quote Link to comment
Charlie69 Posted February 8, 2023 Report Share Posted February 8, 2023 (edited) On 1/28/2023 at 3:12 PM, JohnnyGold said: Hi all! Can anyone tell how thick are these adaptor plates? 10mm perhaps? Thanks in advance! Contact Beebani.. https://ratsun.net/topic/25124-hardbody-disc-brake-brackets-for-620521520320/ Edited February 8, 2023 by Charlie69 Quote Link to comment
Sapoo Posted February 20, 2023 Report Share Posted February 20, 2023 Does a disc conversion kit currently exist that will fit stick rims? Mklotz (Blue hands) has closed up shop and I can’t find Beebani on eBay. Last time he logged in was over a year ago. So is there any other available kit currently on the market to keep rock rims? Quote Link to comment
Crashtd420 Posted February 20, 2023 Report Share Posted February 20, 2023 11 hours ago, Sapoo said: Does a disc conversion kit currently exist that will fit stick rims? Mklotz (Blue hands) has closed up shop and I can’t find Beebani on eBay. Last time he logged in was over a year ago. So is there any other available kit currently on the market to keep rock rims? As far as I ever knew mike was the only one who said it will fit with stock rims.... I think beebani is done..... Silvermine makes a kit but do not fit under stock rims.... You could try searching Facebook, someone made a rear disk bracket, not sure if they did anything for the front... Quote Link to comment
d.p Posted February 20, 2023 Report Share Posted February 20, 2023 He didn’t do anything for the front so I think Mike and Silvermine are the only options left. Quote Link to comment
Crashtd420 Posted February 20, 2023 Report Share Posted February 20, 2023 29 minutes ago, d.p said: He didn’t do anything for the front so I think Mike and Silvermine are the only options left. Only silvermine then.... Mike's done making them unfortunately.... Quote Link to comment
Sapoo Posted February 20, 2023 Report Share Posted February 20, 2023 Well if anyone has a spare kit from Mike they’d like to sell I’d be very interested Quote Link to comment
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