How To: 350z/G35 Dual Piston Brakes - Page 3 - Maxima Forums

Advanced Suspension, Chassis, and Braking Talk about suspension geometry, advanced handling/chassis setup, custom brakes, etc. NOT your basic brake pads and "best drop" Information.

How To: 350z/G35 Dual Piston Brakes

Old 04-07-2012, 06:09 AM
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Is it possible to run our stock rotors with the G/Z caliper due to the 3mm difference stated above? I am doing my brakes today and will probably go pick up 6th gen caliper/brackets from the junkyard with autozone rotors/pads since it is infact confirmed to bolt up.
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Old 04-07-2012, 07:06 AM
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No...3mm is only .118" so you'd end up with a good portion of the pad overhanging. Z/G setup.
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Old 04-09-2012, 07:37 AM
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Well they're done. The total taken off is only about 2mm off the caliper. I ended up borrowing an angle grinder from a friend and stuck a 7" wheel to grind them down. It isn't perfect but it looks a ton better than when I was attempting it with a Dremel. <--:haha:
I decided to grind down the caliper 'ceiling' itself so new rotors wouldn't need to be milled down.

Anyway, here are some final pics: (click to see bigger)

Before and after



Rest of the pics



INTERESTINGLY...the pad has more contact area than a Wilwood pad does.

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Old 04-09-2012, 08:45 AM
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Ahh you beat me to it, that's what I wanted to do instead of milling the rotors.
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Old 04-09-2012, 09:02 PM
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Smile

So what size wheels are we looking at to cover these bad boys????
I'm very interested in doing this upgrade but I'm just waiting to see some setups with wheels!!!
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Old 04-10-2012, 08:02 AM
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Kicking myself...I don't have stock wheels anymore to check fitment, sorry.
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Old 04-10-2012, 01:20 PM
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No stock? What about aftermarket wheels????
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Old 04-13-2012, 07:49 AM
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Originally Posted by datboimell View Post
So what size wheels are we looking at to cover these bad boys????
I'm very interested in doing this upgrade but I'm just waiting to see some setups with wheels!!!
Originally Posted by aackshun View Post
-It BARELY! Clears AE wheels on my 4th gen if you're running the stock wheels I suggest getting a 5mm spacer for safety sake.

The 6th Gen BBK threads cover the minimum wheel size and I covered the minimum offset needed to clear these calipers.

What more info do you need?
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Old 05-23-2012, 01:03 PM
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So has anyone tested these out yet? Performance wise, how are they compared to what you had before? Any other issues?
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Old 05-23-2012, 01:44 PM
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I ended up going with a bigger BBK and am about to sell the G35 calipers I personally grinded down...lol...so I never got to try them out.

Though going from a stock 4th or 5th gen will see a vast improvement. Going from a 6th gen single piston setup to the dual piston setup should still see an improvement as well...

Last edited by MrEous; 05-23-2012 at 01:48 PM.
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Old 05-23-2012, 02:49 PM
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Yeah it's going to be quite some time before I test mine out also.

The red car has some hurdles to jump through before it leaves the garage
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Old 05-23-2012, 03:49 PM
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Sub'd for progress. Good job yall! Makes me wanna put my z32 BBK off for this.
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Old 05-23-2012, 07:44 PM
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Originally Posted by MrEous View Post
I ended up going with a bigger BBK and am about to sell the G35 calipers I personally grinded down...lol...so I never got to try them out.

Though going from a stock 4th or 5th gen will see a vast improvement. Going from a 6th gen single piston setup to the dual piston setup should still see an improvement as well...
I'll buy them if you don't have a buyer yet.
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Old 05-24-2012, 06:50 AM
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Originally Posted by WesCTR View Post
I'll buy them if you don't have a buyer yet.
YGPM sir
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Old 05-24-2012, 07:00 AM
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You know what...

Come to Maxus to get a ride in G35 Dual Piston Brakes on a 4th gen.

The red car may not be pretty by then but it'll be rolling around well enough for people to get a taste of what cost effective braking is.
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Old 05-24-2012, 07:11 AM
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Originally Posted by aackshun View Post
You know what...

Come to Maxus to get a ride in G35 Dual Piston Brakes on a 4th gen.

The red car may not be pretty by then but it'll be rolling around well enough for people to get a taste of what cost effective braking is.
By the way, do you think that there will be brake pedal issues like some complain about with the Z32 brake upgrade?
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Old 05-24-2012, 07:37 AM
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Originally Posted by benjie View Post
By the way, do you think that there will be brake pedal issues like some complain about with the Z32 brake upgrade?
The braking component differences I've encountered between the Maxima and a AWD G35 Sedan are the following:

Master Cylinder Piston Diameter.
Brake Proportioning valve.

The brake boosters are the same, and the rear calipers are similar piston sizes.

I have a box full of Master cylinders for G35s w/ the bigger pistons (than our 4th gens). If you want one I can do $20 shipped.

Now that's if you want to go the extra mile. To me though, I personally think that rumor is like 99% of the other stuff on this forum, I would say take it with a grain of salt and do your own research.
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Old 05-24-2012, 07:39 AM
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Cool

^^ Oh damn you Aaron...haha
Originally Posted by benjie View Post
By the way, do you think that there will be brake pedal issues like some complain about with the Z32 brake upgrade?
My thought just based on observance of specs and nothing else...the master cylinder isn't needing to use as much force to push the pistons on the G35 DP calipers.

G35 DP calipers have 2x43mm pistons equaling 86mm being 'pushed'
300zx 4P calipers have 4x40mm pistons equaling 160mm being pushed.
...and just for comparison
6th Gen single piston caliper has a 57mm piston
5th Gen single piston caliper has a 57mm piston

So the G35 DP size is closer to stock than the 300zx.
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Old 05-24-2012, 07:59 AM
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Master Cylinder Piston Sizes:

95-99 Maxima 15/16" in
05-06 G35 1" in
Z32 1" in

Last edited by aackshun; 05-24-2012 at 08:16 AM.
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Old 05-24-2012, 08:15 AM
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Found this info...
The 1 1/16" Bore Master Cylinder replaces original units on cars built prior to Z32's 01/1991. Build dates from 02/1991 onward used a 1" bore. However cylinders are interchangeable across all year model Z32 applications.
I believe most Maximas have a bore size of 15/16"...

...it may seem like a little bit of difference but I'm sure the 1/16"+ translates to more flow/lbs.
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Old 05-24-2012, 08:17 AM
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I went FSM diving.
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Old 03-16-2013, 06:04 PM
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Back from the dead

I just did a test fit on a 5.5 knuckle and everything looks good. I'm a tool and die maker by trade so i just brought the 08 rotors to work and turned them down about 3mm. I could have gone a little more. As you can see from the pics, there is still room outside the pad. I love this upgrade even before it is on the car because i did not have to hack the dust shield!! I just put everything together with brand new pads and these lightly used rotors.









In picture three it looks like there is a bit of an offset problem, but the caliper bolts right up with no problem.
In picture four you can see the rotors stick out past the pads a few mm. I may turn them down again and paint the outside diameter with a high heat rust proof paint.

Last edited by knight_yyz; 03-16-2013 at 06:07 PM.
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Old 03-19-2013, 05:50 AM
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It s less complicated than I first taught . Sub d .
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Old 04-03-2013, 04:59 PM
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I never did install mine that I had grinded down...ended up getting an APRacing BBK for a good price. lol, so these are just sitting. Need to find a local 5.5 now to sell them to, or someone here.
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Old 04-27-2013, 07:02 PM
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Just did this upgrade today. Could've used a bigger rotor as you could see. Im relatively new to all of this so it was more of a trial and error for me especially since i got the brembo rotors for $100. I kinda like the banana yellow lol. It's different. http://i1323.photobucket.com/albums/...ps7633d5e7.jpg
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Old 04-27-2013, 07:14 PM
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What size rotor did you end up going with? Did you end up decreasing the size of the rotor or grinding the calipers?
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Old 04-27-2013, 07:22 PM
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I went with an oem 05 G35 brembo rotor. And no didn't have to shave the rotor caliper down at all. However I went with the oem G rotor for the mere fact as stated before that I got them for a steal and if the size was off by that much I could always just get rid of them. Drive it around the block afterward and wasn't too impressed. Feels almost the same as stock truthfully but it also could just be me used to the wife's minty brand new Altima brakes...who knows
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Old 04-27-2013, 08:00 PM
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Oh there should be a noticeable difference going up 1" and adding another piston. Looks nice
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Old 04-27-2013, 08:53 PM
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Thank you sir. Much appreciated. The yellow took some much deliberation lol I won't lie I was nervous
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Old 04-28-2013, 09:43 PM
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So by using the OEM 05 g35 rotor this dual piston caliper upgrade is plug and play? No grinding or milling the rotors down? rockauto shows the 05 g35 rotor being 296mm is that the size we need?
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Old 04-28-2013, 09:50 PM
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Complete plug and play sir
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Old 04-28-2013, 10:14 PM
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Originally Posted by MrEous View Post
Oh there should be a noticeable difference going up 1" and adding another piston. Looks nice
Hes not going up 1" hes using 296mm or 11.65" G35 rotors. Interesting that they fit with no modifications.

I would like to use the 320mm or 12.6 6th gen rotors but dont know anyone that can turn them down to the right size.

By the way knight. After turning the rotors down, what is the correct size needed to clear the calipers?
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Old 04-30-2013, 04:19 PM
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*UPDATE* found a loose stabilizer link today (tightened it of course) and got wheels aligned. After which drove a cl55 AMG (amazing car) them drive my fifth gen and believe it or not my stopping power was way better. Anyway back to the subject, after alignment and stabilizer link correction brakes are almost obnoxiously good lol. Def recommend the dual piston caliper mod. And for those of us who aren't so mechanically inclined as to turn down the rotors or grind down the calipers. You can take the route I did and use stock 05 G35 rotors.uvh recommended even though I'm almost dying to know what it would look and FEEL like with the 12.6" 6 gen rotors.
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Old 04-30-2013, 04:37 PM
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Matt...How much pad overhang do you have? About a half inch?
Get as good of pics as you can.
Originally Posted by DjHackStyle View Post
Hes not going up 1" hes using 296mm or 11.65" G35 rotors. Interesting that they fit with no modifications.
Oh duh...Lol - 296mm is our size as well. (~11.6")
Thanks for the correction
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Old 04-30-2013, 04:51 PM
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Not too much. Soon as I get a chance to pull the wheel I will
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Old 04-30-2013, 06:06 PM
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I went ahead and finally put my kit up for sale...all parts are new. I was the grinder in this virgin territory

http://forums.maxima.org/5th-generat...cessories.html
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Old 05-11-2013, 05:28 PM
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Got them installed, just about to go for a test drive.
I didn't measure how much they were after I turned them down. I think I removed about 3mm overall, but I could have taken off more. The pedal feels a little soft in the driveway after bleeding, I'm wondering if the bigger bore master cylinder from the g would help. Also, anyone know if it is direct bolt on?
Or maybe I need different brake lines. I used the maxima stainless steel ones. I guess it's time for a test drive to be sure.
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Old 05-11-2013, 05:31 PM
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Mine felt a little soft too after bleeding the system out, drive it around for a little and it'll go right back to normal if not better
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Old 05-11-2013, 06:13 PM
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Just got back from the test drive and it feels pretty good. Braking is definitely improved. Also jumped up from 215 winters to 245 summers, so that helps a bit too LOL.

BTY, I got my whole setup used, I turned the rotors for the original owner, but as you can see from the rust stripe that shows I could have taken off more to match up with the edge of the pads better
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