Jump to content
SAU Community

R32 Vs S13

joh21m
 Share

Recommended Posts

joh21m Collaborator

joh21m

Posted
Posted (edited)

Hi all,

I put on some r32 discs and calipers onto my s13. I currently have the ca18det brake master cylinder and its crap. The pedal is wayyyy to spongy.

My question is, which is a better upgrade, the r32 rb20det or s13 sr20det master cylinder???

Do i need to change the brake booster as well???

Thanks,

Joh

Edited by joh21m
Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/
Share on other sites
MerlinTheHapyPig Mentor

MerlinTheHapyPig

Posted
Posted (edited)

have you bleed the brakes correctly?

i have plenty of friends who have used stock s13/sr20det master cylinder w/ r32 and r33 brakes with no problems, but sr20det master cyl is better than ca18det. Re-bleed the brakes and see if you still have trouble...

I'd suggest using an sr20det master or rb20det (if it bolts up easily). Your problem is most likely due to bleeding brakes, but i'd play it safe and use the sr master

Edited by MerlinTheHapyPig
Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2013502
Share on other sites
BHDave Grand Master

BHDave

Posted
Posted

Due to the increased volume of fluid being moved and the altered bias as a result of the caliper change i'd be swapping the master.

If you have swapped on r33 brakes all round then a 32/33 gtst master is the go. If you have maintained the s13 rear brakes then look at an s14 master as it has the 4 pot front, single pot rear combo from factory.

That way you have a master that can cope with the changed brakes for both volume of fluid moved and bias.

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2014560
Share on other sites
joh21m Collaborator

joh21m

Posted
  • Author
Posted
have you bleed the brakes correctly?

i have plenty of friends who have used stock s13/sr20det master cylinder w/ r32 and r33 brakes with no problems, but sr20det master cyl is better than ca18det. Re-bleed the brakes and see if you still have trouble...

I'd suggest using an sr20det master or rb20det (if it bolts up easily). Your problem is most likely due to bleeding brakes, but i'd play it safe and use the sr master

yeh i've got the ca18det master cylinder and it sucks... i've bled the brakes and it didnt help...

thanks for the info!

Joh

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2015418
Share on other sites
MerlinTheHapyPig Mentor

MerlinTheHapyPig

Posted
Posted

i don't think brake booster is as important as master cylinder, however i suggest you consult an expert because i don't know for sure.

All the brake booster does is use vacuum from the car's engine to multiply the force on the master cylinder, it's just a diaphragm and a valve, so i don't think it really matters, but someone might want to confirm this...

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2015723
Share on other sites
cefiro Experienced

cefiro

Posted
Posted

Just from when I pick my master up, they said that the late model S13 was the same as the R32 gtst. Here is some info for you. on the side it will say BM then a 2 didgit no 33, 44, 50, 57 indicating bore size. Bigger no. is bigger bore. I got one from a S13 late model Its BM 44. Supposidly the same as a R32 gtst. Mine should be in by the weekend and I will let you know the outcome. I have a 300zx ABS model in mine at the moment but its only a two port (one port for the front and one for the rear) the new one is smaller bore size but has 3 ports. If you dont have ABS then you will need a 3 port non ABS master. hope that makes sence

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2016589
Share on other sites
joh21m Collaborator

joh21m

Posted
  • Author
Posted
Just from when I pick my master up, they said that the late model S13 was the same as the R32 gtst. Here is some info for you. on the side it will say BM then a 2 didgit no 33, 44, 50, 57 indicating bore size. Bigger no. is bigger bore. I got one from a S13 late model Its BM 44. Supposidly the same as a R32 gtst. Mine should be in by the weekend and I will let you know the outcome. I have a 300zx ABS model in mine at the moment but its only a two port (one port for the front and one for the rear) the new one is smaller bore size but has 3 ports. If you dont have ABS then you will need a 3 port non ABS master. hope that makes sence

wow thanks heaps for that info...the guy who is sending me the m. cylinder said the code on the side was BM44...

yeh let us know how it goes, do you have a s13 with the r32 brakes up front also???

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2019464
Share on other sites
MerlinTheHapyPig Mentor

MerlinTheHapyPig

Posted
Posted

the most likely explanation of your problem, is that the brakes haven't been bleed properly.

Make sure you are using the correct procedure to bleed the brakes, sometimes they can be a bitch because air bubbles can get stuck in the lines, just make sure you do it in the correct order and keep pumping pedal until no bubbles come out.

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2030330
Share on other sites
cefiro Experienced

cefiro

Posted
Posted

Try the bleed again, start with the longest line first passenger rear then driver rear, then passenger front then driver front.

Are you useing two people to bleed it???? 3-4 pumps then hold foot on the floor then close the nipple. then return the pedal to normal. then Start again. Normally will take a couple of bottles to flush a whole system.

Also have a look at your brake booster, is it a double diaphram. just to see, if it has two distinct round cylinders, rather than just the one. if its two then its a double diaphram, I dont know if that will influence anything though.

Also if you dont want the master let me know I may have someone willing to buy it from u.

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2030468
Share on other sites
NateR31 Grand Master

NateR31

Posted
Posted

i had this problem once, you can damage the the master by incorrecting bleeding, like pumping it too hard.

the way i bleed, is from the furthest to the master and work your way, three pumps. and bleed, three pumps and bleed ect.. But not super hard thats how you damage, you can break the seal.

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2030740
Share on other sites
joh21m Collaborator

joh21m

Posted
  • Author
Posted
i had this problem once, you can damage the the master by incorrecting bleeding, like pumping it too hard.

the way i bleed, is from the furthest to the master and work your way, three pumps. and bleed, three pumps and bleed ect.. But not super hard thats how you damage, you can break the seal.

how do i know if the master cylinder is damaged???

Link to comment
https://www.sau.com.au/forums/topic/109205-r32-vs-s13/#findComment-2031048
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Rezz
      Shoota's R33 GT-R RB30/26

      By Rezz · Posted

      What an awesome idea to fit the facelift Lamborghini Diablo headlights. They are a perfect fit!
    • hoodedreeper
      Chris' Toyota Mark ii JZX110

      By hoodedreeper · Posted

      An update regarding the registration with the DVLA I sent off the paperwork the day after I collected the car from the port, two weeks later it was all returned with a letter explaining they have rejected the application. This was because the cheque was £20 short for the road tax (I used a price list I found online). Nevermind it is what it is, it was sent back to them the following day with a new cheque. Fast forward another 2 weeks or so, I called them for an update to be told it had been rejected. Yesterday (16th September) I received the documents back along with another letter, this time it was because I didn't put an X in one box on the V750 (personalised number plate certificate), which declared that I had the rights to the personalised number plate. Why this wasn't mentioned in the first rejection letter, I don't know, but it could have saved this headache. The documents were sent back today, so fingers crossed third times a charm and it'll FINALLY be registered on the road just in time for the bad weather (woohoo!) To cheer myself up I lowered the front 25mm, was sick of seeing it sit like a monster truck. No idea how much clearance I'll have getting on and off the driveway, I'll worry about that when I can actually drive it
    • Dose Pipe Sutututu
      Chris' Toyota Mark ii JZX110

      By Dose Pipe Sutututu · Posted

      You're going to miss not worrying about rust in the strut towers like the Skyline shitboxes out there
    • hoodedreeper
      Chris' Toyota Mark ii JZX110

      By hoodedreeper · Posted

      A few little updates that weren't filmed due to not taking long to do or not interesting enough for their own video. My new K&N Air Filter arrived, I went with an RU-4180 which matched the dimensions of the universal cone filter the car originally had.  The battery had gone flat, while that was charging I tidied up the spaghetti wiring at the bulk head and down the sides of the engine Next job was to swap the stereo The Kenwood harness had the female ISO plugs cut off and the male ISO plugs cut off the adaptor loom and joined with bullet connectors. I ordered in a repair loom through work and re-did it all. New Kenwood unit installed (Android Auto, DAB, Bluetooth, Reverse Camera) The bonnet/hood gas struts have been poor since collecting the car. I couldn't find any suitable replacements locally so took a chance on a pair from AliExpress.  The originals don't use a retaining clip to secure the cup onto the ball fixture, would explain why I struggled for 10-15mins trying to pry off the cups. The ball fixtures unscrew using a 12mm spanner, new ones are the same size. Sadly no photo of them fitted, you're not missing much lol The dished Momo steering wheel got replaced with my Momo Tuner, turns out I ordered counter sunk bolts for the horn trim ring (like they normally are for the steering wheel) instead of allen cap (flat seat)  A terrible photo of a Quaife style gear shift knob I've had stashed in my tool box for many years after purchasing the incorrect thread size (I can see a pattern emerging with ordering incorrect parts...) Also threw in a cup holder and a (empty) Boss Coffee can, because why not  
    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      GT-R clearly the better choice! The 300 is certainly not insaly fast but has a decent amount of poke. Does a nice little drift around the corners with a decent amount of throttle. It's VERY predictable in a slide too.  Feels so progressive! People probably presume there's a 25 year old driving it based on my behaviour this week! 🤣
×
×
  • Create New...