240Z Turbo Posted March 21, 2002 Share Posted March 21, 2002 So I go into Eastern Imports(local shop) to look at brake boosters and the 89-91 use a 17/16 mastercylinder and it is made by Tokiko(SP) and is $89. I know people say you loose pedal feel, but I do not road race my car and just want as much stopping force as possible. I am in the process of deciding what brakes to use, Wilwood, SCCA's Outlaw or Stock Z32 stuff. I have heard this master cylinder has some internal proporting valve and I do not want to proportion the brake twice. Does anyone have any information regarding any of this? Quote Link to comment Share on other sites More sharing options...
Guest scca Posted March 21, 2002 Share Posted March 21, 2002 will that master bolt on or is the pattern reversed from what is needed for a z. if its reversed better to use the 93 ZX master as its larger ibelieve ... Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted March 21, 2002 Author Share Posted March 21, 2002 SCCA, this is what I have found. Master Cylinder bore size: 84-1/89NA & Turbo = 15/16" 2/89-8/91NA & 6/89-1/91 Turbo = 1 1/16" 7/90-1/91 = 1 1/16" 9/91-96NA & 2/91-96 Turbo = 1" Kyle(Godzilla) of Zdriver.com uses the 91+ 1" master cylinder on his Wilwood(Arizona Zcar) conversion. Yes, the bolt pattern is 90deg from the 240Z bolt pattern, Horizontal as opposed to Verticle. My brake booster has a plate that can be removed so that I can use either horizontal or vertical bolt pattern. All that is required is that you bore out the holes slightly for it to fit. I can machine a spacer if necessary. Also the fittings are on the engine side of the cylinder as oppossed to being on the bottom. Hell, for $89 and it is a Jap part this is not bad. BTW, SCCA I have pondered your brake stuff, but being a cheap I can't spend the money on the spacers knowing I have full access to a lathe and free material. I think I want to use the smaller thickness, .81 rotors and the 2800 calipers. I don't road race and think for drag/street apps it is more than enough. Quote Link to comment Share on other sites More sharing options...
Guest Aaron Posted March 21, 2002 Share Posted March 21, 2002 It has been mentioned here before that someone saw a 1" Nissan Truck MC on a Z. From what I have been able to tell, the 2WD SE models had that MC. It appears the 4x4, Heavy Duty, and Dual Rear Wheels models had a 15/16". I am not shure if this would be a bolt in or not though. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted March 21, 2002 Share Posted March 21, 2002 And the flip side is the larger the MC is in relation to the brake cylinder, the less pedal travel you have. So a balance point must be found between just the right travel, and just the right pressure. This is where the booster comes in. It allows us to use a larger MC, and still maintain the required foot pressure without taking the Charles Atlas leg building course. Quote Link to comment Share on other sites More sharing options...
Dan Baldwin Posted March 22, 2002 Share Posted March 22, 2002 Bigger MC diameter will REDUCE braking for a given pedal effort. Line pressure is force at the MC piston divided by piston area. Increase piston area and line pressure goes down, effort required for a given level of deceleration goes UP. That's what happened to me when I did the rear disk install and used the 15/16" ZX MC. Now I feel like I need a ZX booster as well! Pedal is always FIRM, though. Quote Link to comment Share on other sites More sharing options...
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