I had the day off today to play datsuns and got my s13 brake conversion practically done.
Firstly a good mate of mine got a few brackets lazer cut for the conversion as he wanted to do the same so i just used that. Very simple bracket.

He used the disk brake strut and disk hub and i used disk brake strut and drum hub.
I took a few measurements and had a play so as to not push out the wheelbase and heres what i came up with:

KB110 Struts
VB110/B110 hubs ( from drum brakes )
S13 4 stud rotors (ventilated)
S13 calipers
12mm thick caliper bracket

Basically the rotor doesnt fit over the disk hub but does the drum hub. Disk hub is 52mm wide and drum hub is 47mm wide so thats 5mm less its pushing out track
All the innards of the hubs are identical and use the same wheel bearing so no mods there.



Take everything off strut so its just the stub axle showing,even brake lines up to flexy line, keep backing plate on.
Attach bracket to s13 caliper.
attempt to fit to caliper mounting ears.
Mark backing plate where cutting is neccesary.
Remove backing plate and remove material with angle grinder where neccesary.
Attach backing plate.
Place on drum hub.
Fit wheel bearing.
Place rotor over top of hub.
Secure rotor with wheel nut, temporary.
Attach caliper with bracket.
Check for rotor centre with caliper.
Make up new piece of brake line to flexy hose on strut.
Bleed brakes.
Booom

Actually i didnt get up to the boom part. i need new drum wheel studs as mine got cut in hald a while ago when i was still using them for bolt on spacers. So have to wait till monday to get em.
For the record drum studs are different to disk studs. The facing has a cut out on the drum ones.

13 INCH WHEEL DOOOO FIT!!



heaps of clearance for sure.

Because i used drum hubs, making the mounting face on them move towards the strut compared to the disk hubs, my rotor was no longer centred in the caliper like they would be if i used disk hubs. Which is a pain but atleast im not pushing out track. SO i had to space the caliper out of the bracket (push caliper towards struts). All is well.

Pretty dam easy conversion really.
Just gotta sit down and do it. Mind you i already had the bracket
Might be convinced to make more if there was enough interest.
4 stud brakes from s13's are cheaps as chips as everyone wants to go 5 stud.
NOTE: 180sx's also came with 4 stud brakes same as s13's but type x 180sx's have larger 4 stud rotors

did you get them off Brenden, or Dave? How about pictures of the mounting plates?

brendan. Will do. Raining cats nd dogs up here today. Dunno if i'll be doing much but will do.

Apparently the later model drum hubs are a little different. I just finished this same conversion and used 1988-ish sunny truck hubs and had to machine them to fit the rotors over.

Great work by the way!

Booyah indeed! things become fairly easy when people start to use there nogens and measurements ahaha good work mate itll pull up pretty well with this setup.For me 200b struts (short strut body,more travel,good for lowering ; ]) hilux 4 spots so i can endo the 1200 hehe.

Good luck with the seats ;]

Jake

when you compare the kb110 brakes to s13 it becomes really obvious why you would do it haha
tiny single pot calipers on tiny non ventilated disks to large single pot caliper to ventilated larger disks (largest under 13's really). The pads on the s13 brakes are almost twice the size of the kb110 and the pot is massive compared. kb110 are single acting aswell where the s13 are double (pushing from both sides not just one).

Cant wait to try them out (will be ages haha)

Chris,
I am just wondering, when you refer to s13
That is the parts code for a 240SX in the U.S. and if that is the case what year model are you using? I am basing this on B110 =1200.

Kelly

yes 1200
s13 as in sedan style, square lights, non pop up unlike 180sx.

There we go, standard s13... they all 4 stud from factory.

aren't the turbo ones 5 stud?

I'm not sure about in NZ but over here the S14 and S15 are five stud but all the S13 a four stud. I could be mistaken though
Back to rotor size, I know that the turbo models use a larger rotor, can't think of the sizes at the moment though.