Seanh Posted August 23, 2002 Author Share #13 Posted August 23, 2002 Yeah, I think 85 is the cut off year for compatibility, or atleast thats what I'v read. Make sure you ask for the 4x4 ones, that price I was quoted was for 2x4 ones and when I went back to get them the price was quite a bit higher for the 4-piston 4x4 ones, so I opted to get them from the junk yard. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13885 Share on other sites More sharing options...
smg1404 Posted August 23, 2002 Share #14 Posted August 23, 2002 Of course I no longer need to look. I should be getting a set in the near future.... I'm excited, I get some real stopping power. I wonder do I need to change anything else, ie master cylinder etc.?? Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13905 Share on other sites More sharing options...
Ed Posted August 23, 2002 Share #15 Posted August 23, 2002 O.K. SO let me see if I got this right. I have a 73 with stock brake clipers with the S/S lines. Now, if I go to Toyota or Napa and order some stock 1985 Toyota 4X4, 4cyl, 2.4 l. Brake calipers. They would be a direct bolt on? No modifications? I would go from a 2 piston to a 4 piston in about 1 hour? Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13906 Share on other sites More sharing options...
2ManyZs Posted August 24, 2002 Share #16 Posted August 24, 2002 It will probably take a little more than an hour, but the modifications you need to do are quite simple. You need to cut the dust shield for caliper clearance and bend the hard line to the caliper. That's about it, a few careful bends in the line, and a few snips with the tin snips or rotary tool and you should be good to go. To answer an earlier question, you do not have to change the master cylinder (unless yours is of questionable operation that is) to do this swap. You can, however, upgrade to the later master cylinder with the 15/16 bore for a little higher line pressure (possibly) and fluid capacity. Not sure if there is a big difference in the actual line pressures, but a little more fluid is probably a good idea since you are now feeding twice as many pistons on the front brakes. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13909 Share on other sites More sharing options...
smg1404 Posted August 24, 2002 Share #17 Posted August 24, 2002 I'm probably not the expert on this, but that is what I think happens. Evidently the Toyota brakes are made by the same vendor as the Datsun brakes. They appear to be enhanced versions of the same caliper. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13915 Share on other sites More sharing options...
Seanh Posted August 24, 2002 Author Share #18 Posted August 24, 2002 I'm probably not the expert on this, but that is what I think happens. Evidently the Toyota brakes are made by the same vendor as the Datsun brakes. They appear to be enhanced versions of the same caliper. Thats right, they are made by the same company. They are exactly the same pretty much. The calipers for the 2x4 Toyota trucks of the 79-85 model years are the exact same as our stock 2 piston brake calipers. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13931 Share on other sites More sharing options...
XYZ Posted August 24, 2002 Share #19 Posted August 24, 2002 I have not changed my stock master cylinder and everything is working fine. Of course I have nothing to compare too since I don't know what the brakes feel like with a larger cylinder but mine work great as is. I imagine the SS lines help with the line pressure though. Tin snips work really well for cutting the back dust plate and the 'S' shape line is not too hard to bend. You probably need about a half day or so depending on your competance in working on cars. Another thing I did was upgrade the brake fluid to Dot 4. When you remove your existing calipers you can let your cylinder drain out and then refill with the higher rated fluid. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13935 Share on other sites More sharing options...
smg1404 Posted August 24, 2002 Share #20 Posted August 24, 2002 I did not reinstall mine when I was replacing the wheel bearings, so i will not have to trim anything. I hope they are not needed. I couldn't think of any reason to put them back on and they weighed a pound or so...... SO no plates. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13940 Share on other sites More sharing options...
Z-point Posted August 24, 2002 Share #21 Posted August 24, 2002 For what it is worth Hi, Because these callipers are too heavy to send to Holland or any place else, I hunted them down here in Holland at the local store at least I think I got them. I've you have a good look at the calliper you will find the mark S12 on it. That’s the mark where all the experts talked about in there stories. Below are the models from Toyota which have the callipers on, but I think Toyota prices are high! These are remakes; they told around 145 euro that’s about us$140. They are from Hitec. HI-LUX 2.2 4X4 YN106/110 MOT.4Y 69KW 01-89 4-RUNNER PICK-UP TYPE N13 01-90 12-93 LANDCRUISER 2.4 4CIL RJ70 MOT.22R 81KW 03-86 03-90 Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-13948 Share on other sites More sharing options...
kmack Posted January 29, 2003 Share #22 Posted January 29, 2003 I'm coming late into this discussion, but I'm getting set to try this set-up. My question is this:Autozone lists 2 types of calipers for the 79-83 Toyota 4x4 pickup. One has a 32mm bore size and the other has 42mm bore size. What are the differences and will those differences matter when mounted on a 240Z? Also will the differences cause any clearence problems?I haven't checked any other parts suppliers yet, so I don't know if they offer the same bore sizes. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-24884 Share on other sites More sharing options...
XYZ Posted January 29, 2003 Share #23 Posted January 29, 2003 Kmack-Try these numbers RC3465 and RC3466. They're Raybestos remanf. calipers purchased through checker auto parts. They're for a Toyota 4x4 '85 pickup. Don't know if these are regional #'s or not but worth a try. I was never given a choice on piston sizes so I can't answer your question but maybe these parts #'s will. Good luck. The dust plate can be cut easily with some tin snips and it's pretty much a straight bolt on. Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-24900 Share on other sites More sharing options...
2ManyZs Posted January 29, 2003 Share #24 Posted January 29, 2003 These are the numbers I got from an ex-buddy who worked at Auto Zone for the 79-84 4x4 calipers.FWIW anyways....7142 L/H 7141 R/H$69.94 each plus 30 coreD137 Carbon metallic pads to fit were $11.99 back then Link to comment https://www.classiczcars.com/topic/2740-4-piston-brake-conversion-questions/?page=2#findComment-24903 Share on other sites More sharing options...
Wilbur
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