Guest Anonymous Posted November 20, 2001 Share Posted November 20, 2001 Just thought of this one... What prevents us from adapting and using the stock 240Z brake rotor and caliper for the rear? Granted we'd lose the handbrake, and might have to use a brake proportionating valve. But we already have these parts, and if we're upgrading our brakes, might as well put them to good use. Saves us the hassle of going to the junkyard and finding parts. Plus they are 10.9" in diameter, and I would imagine the calipers have a greater pad area than the 280ZX rears... Plus they would look good under the wheels Any thoughts on this? Quote Link to comment Share on other sites More sharing options...
Guest scca Posted November 20, 2001 Share Posted November 20, 2001 the piston size is so big its not really going to work well. also the rotor wont slide over the stub axle. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 20, 2001 Share Posted November 20, 2001 Wouldn't the proportioning valve take care of that though, or does it not have enough "range" to compensate for the rearwards shift in brake bias? As for the rotors, couldn't I machine the ID to get them to slip over the stub axle, or is there another problem there? One more thing, what would it take to get the calipers to mount and fit over the rotors? Quote Link to comment Share on other sites More sharing options...
260DET Posted November 20, 2001 Share Posted November 20, 2001 Believe Mike, the front rotor won't fit on the back Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 20, 2001 Share Posted November 20, 2001 Why not? What about the calipers then? Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted November 20, 2001 Share Posted November 20, 2001 As Mike said, the rotor won't slip over the stub axle. The rotor centrebore ID is smaller than the stub axle 'lip'. Take yours apart and have a look (or goto a yard and check parts on yard cars...can be easier to do for some) and some of the fitment/packaging issues will be more easily understood. Quote Link to comment Share on other sites More sharing options...
Guest scca Posted November 20, 2001 Share Posted November 20, 2001 IF you could turn the inside big enough to fit over the stub axle you would be left with nothing but a disc. (no hat to mount it) which would sort of defeat the purpose.. if it could have been used we'd already be doing it. not to say there arent other ways to do the rear conversion, there are... but there just is no cheaper way than the maxima setup ... the 240sx rear conversion (still in prototype) is the next stage up and above that the easiest conversion is to use outlaw calipers with 300zx rear rotors- i have brackets to bolt this all on already Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 20, 2001 Share Posted November 20, 2001 I would have to say that Mike's word is likely gold............. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 21, 2001 Share Posted November 21, 2001 Yes, I'm sure it is. Mike and Ross are our resident suspension und handling experts. And they're both from Vancouver. Seems like all the badasses are from up there... You guys ever heard of Don Nimi? I met him when he came down here last winter, great guy, very knowledgeable. Maybe we should introduce him to the world of Zs... Anywho, what advantages are there to be had by going with the 300zx/240sx combo as opposed to the 280zx/280zx combo? Is the SX caliper appreciably lighter? Wouldn't the former combo require the use of a prop valve, or would that be needed regardless? I mean doesn't the caliper just need to be strong enough to be able to lock the brakes? I doubt the added fade resistance would matter much... Or am I wrong? Quote Link to comment Share on other sites More sharing options...
Guest scca Posted November 21, 2001 Share Posted November 21, 2001 Don is with the 240 crowd already just the SX not the Z. he's got a tube frame 510 and ONE day he'll come out to race me! but he's not into the older Z at all.... as far as 240sx calipers they are just FAR more available than 280 ones so thats the easier part. same size pistons and braking. prop valve depends on the front brake setup Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 21, 2001 Share Posted November 21, 2001 Yeah, it just so happens that I've got a 240SX, that's how I met him, the SoCal 240SX club decided to meet up with him when he came down here, that was definitely fun! One more thing, I hope you'll forgive all the questions, but what's the difference between the 240SX rear discs and the 300ZX rear discs? I ask simply because I may be able to get ahold of a couple for peanuts... You don't suppose I can run my 240SX without rear brakes do you? j/k Quote Link to comment Share on other sites More sharing options...
blueovalz Posted November 21, 2001 Share Posted November 21, 2001 Big difference. On my 240SX I swapped out the rears for 300ZX 4 lug rears. Click on "240SX brakes" at the following site http://albums.photopoint.com/j/AlbumList?u=1541023 The 3rd photo is a comparison of the two rotors. The turbo had 5 lug, but still the same diameter. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 21, 2001 Share Posted November 21, 2001 Aay Caramba! Quite the difference in size... Never knew you had a 240SX Terry. Were you ever on the 240SX.org mailing list? Quote Link to comment Share on other sites More sharing options...
Guest scca Posted November 21, 2001 Share Posted November 21, 2001 it just so happens that sx rotors are the SAME OD as the 280zx tiny little 10.2" ones. 300 rotors are 11.4" or thereabouts Quote Link to comment Share on other sites More sharing options...
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