240sx brake upgrade

[david200095367]

If I use 26mm calipers off a 90' non-turbo 300zx would it be best to use the non turbo rotors and just redrill them to 4 lug. Also does the caliper bolt on directly where the the stock 240sx caliper is?

[steve s14]

i recommend using the rotor that the caliper is designed for and yes it bolts directly where the stock one does, but you have to cut or remove the backing plate to provide room for the larger rotor. also plan on buying a new set of wheels if you are running the stock wheel because the caliper will not clear. lastly the brake line is different so you will have to use a 300zx brake line or have one custom made, stock uses a banjo fitting, 3z uses a tube nut fitting at the caliper.

[david200095367]

Does the stock se rims the 15in clear the 26mm calipers? I thought I saw that in another post.

[steve s14]

not sure about that one, if it does, it most likely needs help with a wheel spacer.

[david200095367]

Should I also replace the master cylinder? I am only doing a front brake upgrade.

[steve s14]

it's highly recommended because the 3z uses a quick takeup master due to the 4 pot caliper. if you use the stock one on your car, you may experience longer pedal travel before the brakes start to engage and a softer/spongey pedal.if you choose to put a 3z master in the car, this will help you.http://importnut.net/300zxbrakeswap.htm#MC

[david200095367]

Do you know where i can redrill 5 lug rotors to 4 lug?

Thanks for all the info!

[steve s14]

where in california are you locatedif you are in socal, i can drill them for you.

[david200095367]

I am in riverbank next to modesto.

[steve s14]

sounds far from where i am. click on my sig, that's where i'm located but that's kind of far from you.

[david200095367]

yea it is kinda of far. do you think a machine shop will redrill them? Do you have your own shop? Maybe i can ship them to you if i cant find a place?

[steve s14]

it's worth a try, if not you can always ship them to me. or you can do it yourself, it's not that hard.you'll need a drill, center punch, and a few drill bits of different sizes. first take your old rotor and place it on top of the new rotor with 5 holes, 5 hole rotor with the hat facing up, 4 hole rotor with the hat facing down so the rotor hats are against each other. the only critical thing is that the center hub opening of the 2 rotors have to align perfectly and one of the lug holes have to roughly align.then center punch the 3 other lug holes dead center.remove the 4 lug rotor and drill the 5 lug rotor at the center punch marks using a drill bit roughly about 1/8 in diameter, this will be the pilot hole so that when you switch to a larger drill bit, it won't wander.then redrill with a drill bit several sizes up until you reach the size just slightly larger than the actual wheel stud in the hub.finally clean the drill shavings off the rotor and install. if the 4th hole that wasn't drilled doesn't align, just hog it out until the rotor fits on the hub. the hub center opening is what centers the rotor not the stud holes, so if you drill the holes a little big, don't worry about it
Modified by steve s14 at 10:58 PM 4/15/2005

[david200095367]

how much would it cost me to get them redrilled by you if i can't find a place to do it for me?

[steve s14]

oh, i don't know, 5$ a rotor plus shipping

[david200095367]

ok sounds like a good price. I will let you know when i am ready for the redrilling. do you have a paypal account?

[steve s14]

unfortunately i don't, but just let me know if you want it done and we can work it out one way or another. e-mail me if you have any further questions. this post is just you and me talking and i have to be sleeping soon.

[david200095367]

i will email you when i am ready. and the best think would be to put the money in the box with the rotors i suppose.

[steve s14]

yeah, but make sure it's a check so that the money doesn't disappear somehow during the shipping process.

[david200095367]

ok i will email you if i cant find a place, and to get your address.

thanks for all the help!

[david200095367]

will i need longer studs if i use the stock se rims and redrilled 300zx non-turbo rotors?

thanks!