Hey guys it looks like my brakes are getting a little mushy. Its probably because I can carry more speed through the corners now or maybe I just need pads but I am looking for a reason to upgrade. I was thinkin about the 300zx caliper kit with the 6th gen rotors but I dont want to throw off the brake balance too much. Now that there is not much dive under braking because of the stiffer springs theres not as much weight being transferred forward while braking thus still quite a bit of stress on the rear brakes.

So how much do the 300zx calipers throw off the brake balance? I deff dont want too much braking up front or else it could get squirelly under heavy braking. Also I remember that one setup required milling the rotors down. Is this with the 300x brakes and the 13in cobra rotors? Also is there anything I can do with the rear brakes to increase their performance? I wouldent go with the blehmco rear brake kit just because its too much money for me.

Ohh yeah and does anyone know if the 300zx caliper fits under the I35 sport rims?

Has anyone tried fitting the 300zx calipers with a 5mm or bigger spacer?

Let me know
Thanks,
Josh

 

No way in h3ll the 300zx calipers would fit behind I35 wheels. Not even with a 5mm spacer.

Also search more threads about the upgrade. OEM sized 300zx rotors and calipers require milled rotors. 13" Cobra rotors require Jeff92se's bracket and 12.6" Maxima rotors require Matt93se's bracket (both for caliper relocation). There are other odds an ends required associated with the different kits, again, addressed in earlier threads.

 

Well I am askin about the blehmco kit in specific. The 300zx rotors with the 6th gen rotors. I think H&R makes a 15 and 20mm spacer. I wonder if those would be enough, but would the tires rub the fender though? I have 235s.

Do you need to mill down the 13in rotors? If you dont I would probably go for the 13in cobra rotors over the 12.6in 6th gen rotors.

 

Like I said before, the OEM sized 300zx rotors require milling. The others don't.

You need to be aware, the Blehmco kit does not use 13" cobra rotors. It uses 12.6" 6th gen rotors. Jeff's bracket/kit uses cobra rotors.

The blehmco site used to have a diagram you could use to see the clearance you needed for the calipers. I'd say, from looking at how thick Z32 calipers are and the 6th gen setup behind my wheels, that you'd need at least a 20mm spacer if not 25mm, and I'm not even sure if that would be enough.

Again, most of these questions have already been answered in earlier threads.

 

I'm aware that the blehmco kit uses the 6th gen rotors. And I know the OEM 300zx rotors need to be milled down I asked if the 13in cobra rotors need to be milled down. If they dont need to be milled down and the price is similar I might go for Jeffs kit instead of Matt's. Thats what I meant when I said I might go for the 13in rotors.

So all I need to know is if the 300zx calipers will fit with a 20mm or 25mm spacer, while not rubbing the fender and if the 13in cobra rotors need to be milled down.

Ohh yeah and how much that added clamping force up front throws off the brake balance

 

Glad you cleared that up. I wasn't sure what all you wanted to do.

The front and rear are different, but I'd be wary of placing that large of a spacer on the front wheels. I think you'd be better off investing in a set with better caliper clearance. I can tell you from personal experience that my stock wheels with 225/50/17 tires and 25mm spacers rubbed, though that was in the rear. I don't have that much experience with front clearance.

 

Yeah I know the suspension is not meant to work with a spacer that large.. I am guessing the 6th gen calipers and rotors would be pretty good. I dont want to get new rims or else this whole brake upgrade gets too expensive to justify it.

 

Try new pads first and see how that works for you. Mushy brakes don't usually denote that you need a BBK - it could be a worn down pad, old fluid, lines expanding.

As for balance, the stiffer springs should actually help your car brake better since there's less diving the rear tires get more contact on the road.

Additionally, your car is EBD-equipped. The computer will do its best to keep the brake force even between corners. (relative to the direction you're going).

 

I know I am making excuses to upgrade the brakes cause they really should be done anyway. BTW how thick are the rear rotors supposed to be on the max because when I had the tires of when I was doing the spring/shock install they looked pretty thin to me and even my mom while driving my car commented that the pedal moved a lot before the brakes grabbed but I also think shes used to her G35, which has a much firmer pedal feel.

 

I don't have the #'s with me right now, but yes it is thinner than the front. I guess to each his own on the pedal feel, mine feels quite a bit firmer than the G35 sedans i've test driven on numerous occasions.

 

Love my 300zx brakes from Blehmco. Brake bias is great: