Z32 or other brake boosters

[g6civcx]

Originally Posted by naed240sx

you realize that the Booster is adjustable right? No need to space out the BMC when you can simply adjust the rod coming out of the Master.

Definitely adjust the pushrod. Otherwise your effect pedal travel will not fully engage the brakes, or will drag the brakes.

Originally Posted by naed240sx

To the OP: I can't tell you how many different Boosters were made for the 300zx, but whent I visited a junkyard, all 4 of the Z's there had the same size booster. It is much larger than the stock s13 booster, and is 2 stage versus 1 stage.

I am running the full 300zx setup. Z brakes all around, Z master and Z booster. I opted not to use the stock booster because I didn't want a pedal so stiff that I would not be able to modulate braking force well.

This setup feels great. The Z booster sticks out at least an inch farther than the s13 one...but no cutting of the firewall is neccesary (not sure why you thought this). You simply bend out the hardlines a bit to reach the new BMC placement. It's a very easy install.

Also realize that your pedal will actually get softer with the z brakes vs the 180sx brakes.

Thanks for the info. Even if I had to slice a bit out of the frame it's no big deal.

[UNISA JECS]

Originally Posted by nissan240sxkid

I think that the z32 fits in the 240 and also you might need to adjust proportioning valve

It'll fit with some work like banging the firewall in, I think fitment issues are different between both S13 and S14 with regards to space available for the Z32 brake booster so it may very.

The porportioning valve is not adjustable.

Originally Posted by Jung918

you also have the option of using the brake booster from an auto 240. It is bigger then the manual 240 booster.

Thats not true for all automatics, only ABS equiped and convertable S13's come with the larger dual diaphram brake boosters similar to the Z32 and it does help a very noticable amount.

Originally Posted by g6civcx

Definitely adjust the pushrod. Otherwise your effect pedal travel will not fully engage the brakes, or will drag the brakes.
Thanks for the info. Even if I had to slice a bit out of the frame it's no big deal.

This needs to be cleared up a little bit there are actually 2 adjustments you can do here:

1) Input rod adjustment (this is the rod that connects to your brake pedal to the backside of the brake booster).

2) Output rod adjustment (this is the rod that purtrudes from the front side of the brake booster and engages the BMC).

For all intended purpuses unless you know what your doing don't mess with option #2.

You should be doing your adjustment threw option #1 above, you can dial out alot of slop if you know what your doing and you can also adjust teh moment your brake light comes on by adjusting the switch also.

*On a side note I have a dual diaphram brake booster for a S13 and S14 both in cherry condition no leaks works fine.