Jump to content

Disc brakes on a kingpin truck!


Fineline

Recommended Posts

I have been in contact with Mike about the distance from the wheel mounting surface to spindle fac on the 620 and 521. The confusion I believe is comming from thi idea of mixing the different bearings. This is what he said,

 

"521 thinner than what? the 620? If you're talking the 620, the spindles are the same as the 521....same outer bearing...similar inner bearing...32mm ID. What the difference is, is the "ring" spacer at the bottom of the 521 spindle. The hub surface...where the brake drum touches.....is exactly the same distance from the spindle surface where the bracket would mount. Your brackets will work on either a stock 620 with drums or a stock 521 with drums. I'm pretty sure what you are questioning is that difference I was talking about.....the 2mm. What that is is when you take the 620 drum inner bearing and put it on a 521 spindle with the ring removed. The reason to do this is because the 521 inner bearing is nearly impossible to find...while the 620 is readily available.....although it is a bit different. I have pics of it up on the original disc on a kingpin thread. If you look at them, you'll notice that the .....I just looked..it's page 5 http://www.nwde.org/extras/forum/forum_posts.asp?TID=2005&PN=5 about 2/3's down....boss at the base of the 620 spindle is taller because the bearing is different. Anyway.....check out the pics and the caliper measurements.....if that doesn't give you what you want, let me know and I'll get whatever you're missing.

 

But....basically the answer is that the wheel mounting surface is exactly the same distance from the bracket mounting surface on each of the "stock" setups. It's the intermixing that makes a 2mm differnce.

 

If the bracket was made to offset the caliper 2mm less, then 2mm washers could be put between the bracket and the caliper on the stock setup. The drawback being that there's a lot more 620 guys than 521 guys.....so maybe have to different spacers made and weld up different versions of the bracket :"

 

I guess the answer to everyones question is "yes", these brackets will bolt right up to a 521 without any spacer provided....

1. You want to use the z32 calipers.

2. You are using the stock 521 inner bearings with the 521 spindle.

 

Hope this clears things up.

Link to comment
  • Replies 80
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

so reading what Mike wrote, these brackets will work for either the 620's or 521's with no other mods...

nice to have that cleared up...

I was under the impression that it would work only with the 521's...

I would guess that would be the same with Beebani's setup with smaller calipers....

Darned...wish I had know that earlier...Beebani raised his price since he first posted it up...

Link to comment

That is correct. They will work as long as you are using the "matching" set from whatever vehicle you have. i.e. spindle, hub, bearings. If you wanted to convert your 521 to the 620 bearing style you could do it by replacing the spindle assembly and all I guess. That would make the issue of the lip on the spindle moot. Someonw would have to make sure the kingpin assembly was the same.

Link to comment
so reading what Mike wrote, these brackets will work for either the 620's or 521's with no other mods...

nice to have that cleared up...

I was under the impression that it would work only with the 521's...

I would guess that would be the same with Beebani's setup with smaller calipers....

Darned...wish I had know that earlier...Beebani raised his price since he first posted it up...

Uhh, no I didn't. Always been $50 a set.

Link to comment
Uhh, no I didn't. Always been $50 a set.
hmm, then someone else did it for you...check the first page of your NWDE thread...

 

If that's the case, then I will be needing a set in 2 weeks...payday...that way they can be here for the spindles I'll pickup at GG...

Thanks!

Link to comment
hmm, then someone else did it for you...check the first page of your NWDE thread...

 

If that's the case, then I will be needing a set in 2 weeks...payday...that way they can be here for the spindles I'll pickup at GG...

Thanks!

Oops, well they're $50 a set now. At least that's what I charged Dwight for his. I guess I forgot that I posted that. Let me know Paul.

Link to comment

awesome write up, so this is a bolt on and go thing right?? lets say if you were to bag the front on a 521, would there be any clearance issues. im kinda ignorant on what you guys are talking about, so sorry if my questions seem a little dumb ha ha. if i am understanding this correctly, i would love to buy a set with my tax return money.

 

also, what master cylinder would you recommend using??

Link to comment
  • 1 month later...

So in my search for hardbody front calipers I came across this cross reference list...

 

Now I know what else to keep an eye out for at pull-a-part :D

 

MAXIMA

1988 V6-2960cc 3.0L F/I Vin VG30E

1987 V6-2960cc 3.0L F/I Vin VG30E

1986 V6-2960cc 3.0L F/I Vin VG30E

1985 V6-2960cc 3.0L F/I Vin VG30E

 

PICKUP 720

1986 L4-2389cc 2.4L F/I Vin Z24i

1986 L4-2488cc 2.5L Diesel Vin SD25

1985 L4-2389cc 2.4L 2 BBL Vin Z24

1985 L4-2488cc 2.5L Diesel Vin SD25

1985 L4-1952cc 2.0L CARB Vin F

1984 L4-1952cc 2.0L 2 BBL Vin Z20

1984 L4-2389cc 2.4L 2 BBL Vin Z24

1984 L4-2488cc 2.5L Diesel Vin SD25

1983 L4-1952cc 2.0L 2 BBL Vin Z20

1983 L4-2187cc 2.2L 2 BBL Vin Z22

1983 L4-2164cc 2.2L Diesel Vin SD22

1983 L4-2389cc 2.4L 2 BBL Vin Z24

1983 L4-2488cc 2.5L Diesel Vin SD25

1983 L4-2187cc 2.2L 2 BBL Vin Z22S

 

PICKUP HARDBODY

1997 L4-2389cc 2.4L F/I Vin KA24E

1996 L4-2389cc 2.4L F/I Vin KA24E

1995 L4-2389cc 2.4L F/I Vin KA24E

1994 L4-2389cc 2.4L F/I Vin KA24E

1993 L4-2389cc 2.4L F/I Vin KA24E

1992 L4-2389cc 2.4L F/I Vin KA24E

1991 L4-2389cc 2.4L F/I Vin KA24E

1990 L4-2389cc 2.4L F/I Vin KA24E

1989 L4-2389cc 2.4L F/I Vin Z24i

1988 L4-2389cc 2.4L F/I Vin Z24i

1987 L4-2389cc 2.4L F/I Vin Z24i

1986 L4-2389cc 2.4L F/I Vin Z24i

 

STANZA

1989 L4-1974cc 2.0L F/I Vin CA20E

1988 L4-1974cc 2.0L F/I Vin CA20E

1987 L4-1974cc 2.0L F/I Vin CA20E

1986 L4-1974cc 2.0L F/I Vin CA20E

1985 L4-1974cc 2.0L F/I Vin CA20E

 

STANZA WAGON

1987 L4-1974cc 2.0L F/I Vin CA20E

1986 L4-1974cc 2.0L F/I Vin CA20E

 

Hope this helps out others ;)

Link to comment

Im starting to run my lines for the disc brake conversion and about to place the portioning valve.. I bought a bunch of 3/16 line with metric fittings, or they are supposed to be, it said imports/japan, but those are probably the newest japanese cars.. anyway.. the SAE stuff on the 521 I will be getting rid of all of it, but the 81 280 Z stuff im saving the fittings that came off and might flare them onto the new lines, they look a bit diffrent than the new stuff, they dont have the part at the end of the fitting with no threads, and it seems to me that there wont be enought threads catching.. as for the izuzu and 300z parts as of yet I am not sure, that gets me to the question

 

these wilwood portioning valves are SAE right, thats the dimension on the sticker on the thing?? and do i need the brass fittings or do i plumb right into it... lastly, what do i use on the thread before assembly... will regular threadlocker due??

 

disc.jpg

 

OK I found the type of metric lines at pep boys that should be used on the 280zx M/C and splitters, probably the Izuzu stuff as well.. pep boys had two types of metric lines, the one at the top, and the one on the bottom... the one in the middle is the U.S. thread for the Portioning Valve... you should be able to read the labels that state, Metric, or U.S. thread

Brakelines.jpg

Link to comment

Brake lines do not need threadlock. Using it would probably come back to haunt you at some point. The threads taper slightly and "lock" themselves. The wilwood stuff uses 1/8NPT fittings. They are available pretty much anywhere.

Link to comment
Brake lines do not need threadlock. Using it would probably come back to haunt you at some point. The threads taper slightly and "lock" themselves. The wilwood stuff uses 1/8NPT fittings. They are available pretty much anywhere.

 

is this a 1/8 npt fitting,

 

and yes I know it doesnt say it anywhere on there.. I'm still dealing with some pretty inexperianced parts guys... they might as well work at McDonalds as much help as they offer.

brakelines004.jpg

Link to comment
  • 1 month later...

Tangent, that's not an NPT thread on your line - it isn't tapered. I'm pretty sure American brake line fittings are 3/8-24, and metric are 10mmx1.0 (it's hard to tell them apart by eye - they're very close). They don't have to be tapered because the flare does the sealing, not the thread. I suspect the Wilwood valve has NPT threads so you can install the correct fitting (NPT/flare adapter) for the brake lines you want to use (inch or metric)

 

Andrew

Link to comment
  • 4 months later...
Does anyone know if the 66 and earlier roadster front brakes will work on the 520's?Thank you!

 

Dunno, but you might want to price roadster brake parts before you consider that:

 

Rotors: $200+ a pair

Cylinders: $280+ for all four.

Cross-over tubes: $15 or $25 depending on which one (there's two of each).

Link to comment
  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.