Brembo BBK

[jet_dogg]

That is one of the reasons why I am considering the Club Race vs the Pista, the race caliper has a spring clip, so no tools required.

Eas steve has been running the pistas on his e36 race car and last I talked to him he really liked him.

I'll get more info this week if I can remember.

He said he was running the generic 4 pot brems before and he likes the pistas more. They're better pretty much by every objective and subjective metric and that he would do it again.

That's all he really had to say on that. If you have the chips then I'd say it's a safe bet.

[George Hill]

More info:
The club race kit uses a 20mm pad where the pista uses an 18mm pad, considering the backing plate is 5mm means 13% more pad.
The club race kit uses a B18 pad profile which is fairly prolific, I'm not sure about the Pista pad.
The club race kit uses a 32mm rotor, where as the Pista uses a 35mm rotor.
The club race kit can replace pads with no tools, the Pista doesn't have to come off but you do have to remove the bridge.
They both are 200mm in radius to the furthest point from center, the Pista protrudes 36mm from the rotor face where the club race is 39.3mm, so I would imagine the Pista is going to have more wheel fitment options.
Waiting to hear on weights, but I suspect the Pista is lighter.
I imagine the Pista caliper is "better" overall, lighter, stronger, etc (performance aside).

Obioban I think that refers to whether they have dust boots or not.

While I have installed the AP/Essex Radi-CAL setup on another car I am wanting to build a relation ship with Brembo/Race Technologies as I don't want to only build race cars, but street cars and I feel their catalog aligns more with what I do vs AP/Essex at this time.

With that said here is what I am doing, my wagon (Eileen) is S54/ZF8 swapped and weights around 3000lbs wet, I'm actually going to weight it next week. The car is first a street car but I do road and drag race it (we are doing Hot Rod Drag Week with it next week). Right now I run 330 brakes front and rear with DTC60 pads. This has been an acceptable budget setup and I have no complaints considering the costs. The problem with this is that I also still am running 325 trailing arms so I have no parking brake. I want to add a parking brake which is going to include swapping trailing arms. And if I'm swapping I want to step towards the final solution instead of having to change it again in a short time.

I want to run M3 front suspension/brakes. But I really don't want to run an M3 rear subframe/diff because I have a 4.44 ratio and getting that in a 210 diff is gonna be spendy (at that point I would just swap to an 8.8 ford). SO I am trying to decide if I can get away with 330 rear brakes and trailing arms with my M3 front brake setup. I've messed around with the calculator on buildjournal that I think was made by @p0lar? And it seems to work ok but I don't think it takes into account stepped master cylinder bores which I think ultimately matters?

IF the brake bias is really funky then I have also considered seeing if I can run M3 trailing arms with my 330 CV shafts. Since both cars use the same UCA, LCA and Wheel bearing and the track widths are the same I think this COULD work and then I can run the M3 rear brakes, but I can't find anyone who has done it to know for sure.

The other side is that there is some notion I've seen that brake bias doesn't matter when ABS is intervening, makes sense but IDK if it is true in practice. I do think that bias comes more into play when modulating the brakes when the wheel is turned, but again how much that matters I am not sure.

*I drive on track, but I'm no expert, I build street cars, lol

[discoelk]

IF the brake bias is really funky then I have also considered seeing if I can run M3 trailing arms with my 330 CV shafts. Since both cars use the same UCA, LCA and Wheel bearing and the track widths are the same I think this COULD work and then I can run the M3 rear brakes, but I can't find anyone who has done it to know for sure.

I ran an E46 M3 subframe/diff/driveshaft/CVs with stock 330i upper, lower, and trailing arms in my ZHP sedan. Worked fine. Compatibility-wise, you'd be doing the opposite so it should be fine.

[George Hill]

I ran an E46 M3 subframe/diff/driveshaft/CVs with stock 330i upper, lower, and trailing arms in my ZHP sedan. Worked fine. Compatibility-wise, you'd be doing the opposite so it should be fine.

Track car at the limit or street car? IMO those are two different things. I know M3 rear swaps on non-m's are a common swap, but that doesn't mean its an optimal setup (not that it means it ISN'T optimal either). I likely think it will be fine, but I'm curious to see what the math says. Also keep in mind a non-m M/C is a 22mm front bore and 20mm rear bore, where an M3 is either 25/20 or 25/22. The M3 calipers are 42mm piston bore and the 330 are 40mm. You are changing something but whether it matters at this change IDK.

[discoelk]

Track car at the limit or street car? IMO those are two different things. I know M3 rear swaps on non-m's are a common swap, but that doesn't mean its an optimal setup (not that it means it ISN'T optimal either). I likely think it will be fine, but I'm curious to see what the math says. Also keep in mind a non-m M/C is a 22mm front bore and 20mm rear bore, where an M3 is either 25/20 or 25/22. The M3 calipers are 42mm piston bore and the 330 are 40mm. You are changing something but whether it matters at this change IDK.

I'm a little confused what you're asking. I was only talking about compatibility for the suspension stuff. The car was my daily with stock 330i brakes F/R. I used 200TW tires and DTC60s on track. It had other suspension mods and stuff but full weight, interior, AC, etc. I never had an issue. It stopped awesome. It was the primary reason I sought out a MK60 M3 as a replacement.

[George Hill]

I'm a little confused what you're asking. I was only talking about compatibility for the suspension stuff.

I guess I misunderstood what you meant. I know mechanically it will work, but I was replying to the dynamic characteristics of the swap.

I think it likely won't matter, but I wanted to have some numbers or real world experiences. Adding a bigger rear brake (piston) moves bias rearwards in your situation. Adding more/bigger pistons to the front moves the bias forwards (my situation) so not truly an apples to apples comparison. Also the M3 and 330 have difference master cylinders so that could be another variable in our scenarios.

For a street car I doubt these bias changes make a difference but a car driven at max effort is where these changes are going to be seen I would think? I.e. 75/25 bias on the street probably doesn't brake noticeably differently when putting around on the street, but trying to rotate the car in an 85mph 'S' turn on track it might. When you initially posted it seemed like your car was a street car which is why I asked.