anyone here use 8pistons kit yet?
Thread Starter
Joined: Oct 2004
Posts: 10,067
Likes: 1
From: Yorba Linda, CA
Originally Posted by VN_350z
8 pistons for the rear?
https://my350z.com/forum/showpost.ph...82&postcount=3
Originally Posted by Bubble
Originally Posted by Bubble
Originally Posted by VN_350z
You are not driving a "train". No need for that
More pistons != (does not equal) more stopping power...
Although it is overkill in regards to performance, it is nice though 
Originally Posted by Wired 24/7
Read the posts by the stoptech representatives on this site.
More pistons != (does not equal) more stopping power...
More pistons != (does not equal) more stopping power...
Respect
JET
Originally Posted by JETPILOT
Yeah.... that's why Stoptech just came out with a 6 piston application for the Z.
Respect
JET
Respect
JET
More pistons SHOULD NOT equate to more stopping power unless they added total piston area. I'm not sure, but I would think a huge stopping power (oversized pistons) would simply lock up the wheels too easily. But why take my word for it...?
Originally Posted by DZeckhausen (Stoptech)
That's because some vendors were taking a standard sized caliper and adding 6, 8, or 12 pistons without a technical reason to do so. They were touting it as somehow better than a 4-piston using a pad of the same shape and size, arguing that more pistons somehow equated to better braking. Even worse, most of those calipers had much more total piston area, resulting in an overamplified system that gave you longer pedal travel than stock and heavy front bias. The marketing claim was always something like "more pistons for more stopping power!" This simply preyed on the customer's lack of engineering knowledge about brake torque.
This 6-piston StopTech caliper uses as many pistons as it does to apply even pressure to a huge pad. And the pistons are sized appropriately to each application, just like the ST40. So if you were to transition from a 4-piston to a 6-piston StopTech on the front of your 350Z application, the total piston area would be identical, meaning six smaller pistons would be used and pedal feel, pedal travel, and brake balance would not be compromised. You will never hear StopTech advertise "more stopping power" to sell this caliper.
This 6-piston StopTech caliper uses as many pistons as it does to apply even pressure to a huge pad. And the pistons are sized appropriately to each application, just like the ST40. So if you were to transition from a 4-piston to a 6-piston StopTech on the front of your 350Z application, the total piston area would be identical, meaning six smaller pistons would be used and pedal feel, pedal travel, and brake balance would not be compromised. You will never hear StopTech advertise "more stopping power" to sell this caliper.
Originally Posted by J Ritt (Stoptech)
Our competitors always claim, "more stopping power," with regards to 6, 8, or more pistons in a caliper. "Stopping power" is a meaningless phrase. On this application, our ST-60 caliper will be putting out the same amount of torque as our ST-40. The torque will be distributed over a greater surface area however...that's it. Essentially, instead of four larger pistons, you'll have six smaller pistons that have an equal total piston area.
Last edited by Wired 24/7; Mar 2, 2006 at 12:49 AM.
Thread Starter
Joined: Oct 2004
Posts: 10,067
Likes: 1
From: Yorba Linda, CA
hehe...for people that don't track the car like me, BBK is already OVER KILL. I already kill the performance of my ZR when i put on the 20" chrome wheel. 
I'm going for the look mostly. Plus, 380mm rotor will fill up nicely with 20" wheel. Therefore, regardless of 4/6/8 pistons, it really doesnt' matter. But while at it, why not 8?
I'm going for the look mostly. Plus, 380mm rotor will fill up nicely with 20" wheel. Therefore, regardless of 4/6/8 pistons, it really doesnt' matter. But while at it, why not 8?
Originally Posted by Bubble
hehe...for people that don't track the car like me, BBK is already OVER KILL. I already kill the performance of my ZR when i put on the 20" chrome wheel. I'm going for the look mostly. Plus, 380mm rotor will fill up nicely with 20" wheel. Therefore, regardless of 4/6/8 pistons, it really doesnt' matter. But while at it, why not 8?
I'm going for the look mostly. Plus, 380mm rotor will fill up nicely with 20" wheel. Therefore, regardless of 4/6/8 pistons, it really doesnt' matter. But while at it, why not 8?
Come on guys...you're talking to a guy who has monitors behind the back of his headrest. Do you think he's looking for practicality? He's doing it because he can
Rock on Bubble & keep doing it up with the crazy mods cause someone has to do it! That's why it's always exciting to see what this mad man thinks of next.
Rock on Bubble & keep doing it up with the crazy mods cause someone has to do it! That's why it's always exciting to see what this mad man thinks of next.
i guess i'm the first one that order the 15" rear kit so they are not sure about the spec too.
You're laughing about this situation, but doesn't it concern you that you're being used as a guinea pig on this product? It is possible that a wrong caliper can go out the door, but every product has a standard Bill Of Materials (BOM), which should be sorted out for this product if it's going to retail. They should be able to look at the BOM, see what the correct caliper is, and give you one. Since this is not the case, it's obvious that this kit has never been test-fitted on a car, let alone actually tested for performance...yet it was shipped to you as a finished product!
BTW, this is not the first time this has happened with a Rotora kit on the 350Z. An almost identical situation occurred about 2 years ago when they were introducing their first kits for the Z. The kit had massive pad overhang due to poor design and fitment. I'd be very leary about the performance/safety of this kit. I can't imagine what the piston sizing and balance of this kit is if Rotora's "not sure about the spec," and they've already shipped one to a customer. This is one of the biggest problems with the aftermarket in our country...no standards. Too bad we don't have a system like TUV to weed out this sort of thing.
We're not talking about headrest monitors here, we're talking about a safety item...please be careful.JETPILOT,
As for our six piston and "stopping power," please see this thread:
https://my350z.com/forum/brakes-and-suspension/174294-stoptech-s-6piston-beauuuuttyyyy.html
We released the kit because people asked for it, but it's by no means a necessity, and only has limited benefits for certain people over our four piston kits.