Well this is always a question that no-one can answer.
Will my Wheels clear a possible BBK ?? 300ZX Calipers and either Maxima rotors or Cobra Rotors.

18" Racing Hart C5's
I measured 5 1/2" out from the Center of the wheel, and measured the space between the spoke and the rotor, and theres about 2 1/4", NOT 2 1/2"

 

I'll measure mine and get back to you later tonight if you don't get an answer . took the bike today

 

What's the offset of the wheels??

 

I have no idea

 

looks good matty. I'm still trying to figure out what setup will clear 02 17's. I like the green too.

 

My wheels had the offset on the back of one of the spokes, maybe yours does too?

 

Please make a base measurment for me guys..before I start ordering parts

-matt

 

Where did you get that 2.5" #? Matt's site? If so you will need an additional 10mm for my stuff to fit.

Use spacers. Or go with my stuff and Q45 calipers or J30 calipers. They use 2 piston calipers that are the inside. Freeing up alot more clearance inbetween the caliper/wheel.

http://forums.maxima.org/showthread.php?t=468945

 

Nah..if Im going to do it, Im going to do it right

I got the 2 1/2" measurement from Matt's site

-matt

 

Well off hand, you will have the best chance with Matt's kit if you can get it.

Although did you measure where the calipers are OR where the caliper WILL be once you put on the relocation bracket? Your wheel spokes look like they turn in as it goes to the outside.

Not too sure why you think using the Q or J rotor ISN'T doing it right. I think they are a great alternative to the 4-pistion. IMHO most of the great braking is from the torque arm advantage of moving the caliper out. Not necessarily the 4-piston caliper.

 

I measured from the REAR of the wheel-spoke to the front Flat part of the rotor...that distance is 2 1/4"

Is that the right part to measure

-matt

 

Yes that's right. BUT that's where your caliper is NOW. With the brackets, the caliper will be moved out further to accomodate the larger rotor. What's where the caliper WILL be. Use your same measurement method but measure from where the caliper will be after it's moved out. Not where it sits currently.

 

But I am measuring to the face of the ROTOR, not the CALIPER

-matt

 

But it's the caliper clearance that's going to count. Unless the clearance of the inside of the wheel's spokes stays the same from the hub to the wheel's barrel.

 

So my only option is to order all the parts, $600-$700 worth of parts, and install everything, and it my wheels dont fit them im outa luck ?? I wanna make 100% sure that this will work before I invest. ya know ??

-matt

 

Those wheels clear the calipers on the 300zx even with the bracket accomodating the bigger Cobra rotors, so I don't see why you would have a problem. If you have just a slight clearance issue, you could sand off part of the Nissan lettering.

 

No. I'm trying to get to measure from the right spot for the best guess possible.

Where your caliper sits NOW isn't where they will be when the bbk is on. Therefore you have to measure the clearance where the caliper WILL be. Not where it's at now. With either kit, the caliper will be moved out another 1.5 - 2". I'm **** w/ editing photos but see this pic. Maybe it will help. Notice the red:

 

You can always use some spacers if there is no room for the calipers, that is if you have enough room for the wheels to move out a little more.

 

hey matty you can check my bbk out monday when i see you to pick up the stillen lip--i have blehmco kit with j30 and it stop hard

 

See if you can put your wheel on his combo and measure the clearance from the top of the spoke.

 

Ok Matt, as far as your rims having enough diameter to fit the BBK; they're fine, I'm rockin 17's with my Cobra/Z32 BBK.

Now for the rotor to spoke clearence, I measured about 3" which leaves me with about a 1/4" gap from the back of the spoke to the caliper.

Looking at your measurements it looks like you may need spacers to fit the Z32's on there. Not sure when it comes to the Q45's but I'd imagine they would fit with your clearence. HTH

 

What spacers should I order if I do decide to go with the Z32 Calipers ?? 5mm, 10mm ??

I figure, If I do a BBK, might as well do it right, right ??

-matt

 

Well that would depend on how much space you need. If you are going to use spacers, you should look at the space between your tire and fender. Are your wheels pretty flush right now? A spacer may push the wheel out a bit and make it look nice and flush, or it may push it out too much and make it look odd.

 

If you are looking to create .75in of space (since you said you had about 2.25in spacing and another orger suggested 3in) .75 in ~ 19mm... so you should get a 20/25mm spacer

 

i have to look into this as well. but i think 19's would clear z32's

 

Damn straight man.

Ok, one thing to take into account is that your clearences will be different depending on what rotors you decide to use. The Cobra rotors actually eat up about 3/8" of space because the rotor hat is shorter (this moves the rotor center out towards the wheel about 3/8"). This is why the caliper has to be spaced off the mounting tabs like so:


Doubt this is the case with the 12.6" maxima rotors but I have no experience with those. So looking at the clearences you posted and going with the Cobra rotors, 2 1/4 - 3/8 = 1 7/8 which is your clearence after the rotor is installed. Then using my clearences, 3 - 1 7/8 = 1 1/8 which is about the thickness of spacer you would probably want to run. Now, another thing to take into account is the spoke design of your rims. If the spokes 'dish' outward traveling up the radius like my rims:


then you may gain clearence because the caliper also gets repositioned ~2" up the radius as well. This was excatly the case when I switched from the Z32 rotors to the Cobra rotors. I had a total clearence of ~1/8 behind the spokes with the Z32 rotors and actually gained another 1/8 because of my spoke design.

As always, let me know if you have any other questions or if I didn't explain anything clearly enough. Or even email me or give me a call.

 

Those don't look like my brackets.

 

Hehe, I made them before you came up with the concept of selling yours .......