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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 02-12-2018, 02:15 PM   #1
V8hoonin
 
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Brake booster upgrade

Hello fellow peoples, i recently did the ctsv brake swap with a 17/16 300zx BMC however my brake pedal feels a little stiff, I'm using a factory 240sx brake booster and I want to upgrade to a bigger one, I know ppl do the 300zx brake booster or the 240sx with ABS brake booster but I wanted to know if there was another car out there that we can use the brake booster from? Couldn't find anything online so I'm making a thread any info will help.
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Old 02-12-2018, 02:35 PM   #2
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An automatic S14 brake booster is larger too, and will give more assist in braking.
Was your car originally auto or manual?
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Old 02-12-2018, 03:02 PM   #3
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Originally manual
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Old 02-12-2018, 04:32 PM   #4
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Are you sure you aren't wanting to upgrade the brake master cylinder? I think that would make a larger impact on brake feel than changing the booster.
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Old 02-14-2018, 10:14 AM   #5
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Bump, anyone do anything different? Think I'm just gonna order a 300zx booster
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Old 02-14-2018, 03:26 PM   #6
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... You mean master cylinder?
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Old 02-14-2018, 03:29 PM   #7
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I have a 17/16 brake Master cylinder with upgraded brakes, the pedal feels stiff af so I need a bigger booster
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Old 02-14-2018, 03:36 PM   #8
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Ah, yeah I totally skipped over the part of you already having the z32 BMC. I changed from an s13 booster to a dual diaphragm S14 booster (I believe the ABS booster is the dual diaphragm) for turbo downpipe clearance, and I do believe it also made my brake pedal feel a little bit softer. Is yours stiff just at idle or also when driving around at higher rpms? You could also try going to a smaller diameter BMC maybe? I think that would soften it up some.
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Old 02-14-2018, 03:46 PM   #9
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It's stiff no matter what, really not liking the feel, was thinking about getting a z32 dual diaphragm booster but wanted to see if there was another booster ppl use
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