Build Journal Megane RS BBK Kit available this morning.

[S14]

CSL is a different car than stock in terms of weight distribution and suspension set-up, so I wouldn't assume that the CSL bias is the right thing to aim for on a non-CSL M3.

realistically, how different is the CSL from the reg M3 in weight distribution?

To your second sentence, what is the correct bias to aim for if you have other than stock E46 M3? Say you took 300lbs out of the car, stiffened the suspension and made it adjustable outside of standard form (camber plates/adjustable lower control arms etc.) would it be most correct to keep the stock bias, or would more rearward brake bias be better?

[S14]

Please refrain from ever commenting on brake bias again.

what is incorrect about his statement?

[foolio]

Agree to disagree I guess. I have only ever used the red loctite on wheel studs and floating rotor ring hardware, and front diff bolt. All required heat to remove with hand tools.

You sure you're not confusing it with blue loctite that also comes in a red bottle?

I’m with eacman on this. Red Loctite is for stuff you really do not want to come apart without a fight. It is odd that they often put blue in the red colored bottles.

[elbert]

Brand new calipers,

The Buildjournal description (at the top) lists the calipers as new. But if you scroll down, it says "TUV Certified reconditioned calipers"
I guess it depends on what is reconditioned, but in any case I would still consider it as a used item.

[CrookedCommie]

what is incorrect about his statement?

If you move bias towards rear on a front engine car where most of the weight under braking is going to be in the front, you will (this part he correctly said) lose rear traction - unfortunately, physics works differently in the real world, and when you lose traction, you can't increase braking. This type of rotation would not be beneficial for any car, street or race, but maybe canyon bois use this trick.

[r4dr]

That FreakyParts kit looks good, especially the 360 mm version. Would the only downside be increased unsprung weight?

[tnord]

This type of rotation would not be beneficial for any car, street or race, but maybe canyon bois use this trick.

I mean, I spent 7 years racing with SCCA in SM/ITA, built multiple cars for myself and others, crewed/co-drove on multiple winning enduro teams, and finished 4th at the ARRC sprint race and 1st in the endurance race. but I guess I'm a canyon boi.

https://www.diyautotune.com/news/res...-of-champions/

[ATB88]

To your second sentence, what is the correct bias to aim for if you have other than stock E46 M3? Say you took 300lbs out of the car, stiffened the suspension and made it adjustable outside of standard form (camber plates/adjustable lower control arms etc.) would it be most correct to keep the stock bias, or would more rearward brake bias be better?

That's a good question. As a physicist and engineer (in areas largely unrelated to anything involved here lol) I would expect that it's a difficult one to answer without doing a lot of expensive R&D akin to that which was done in the design process for both the stock and CSL M3s. But maybe someone who knows something about automotive engineering can chime in and say how much of a big deal and how hard it is to meaningfully optimize for these kinds of things?

[tnord]

realistically, how different is the CSL from the reg M3 in weight distribution?

To your second sentence, what is the correct bias to aim for if you have other than stock E46 M3? Say you took 300lbs out of the car, stiffened the suspension and made it adjustable outside of standard form (camber plates/adjustable lower control arms etc.) would it be most correct to keep the stock bias, or would more rearward brake bias be better?

"better" can have different definitions. for street use, really anything between a base M3 and a CSL bias should be fine. if you're talking about lowering lap times, or in a racing environment, it's going to be driver dependent on their driving style. in a very overly simplistic view you just keep increasing rear bias until the rears lock up, then back off of it.

it doesn't necessarily have to be done via bias, you can work around it with pad choice as well.

[CrookedCommie]

I mean, I spent 7 years racing with SCCA in SM/ITA, built multiple cars for myself and others, crewed/co-drove on multiple winning enduro teams, and finished 4th at the ARRC sprint race and 1st in the endurance race. but I guess I'm a canyon boi.

https://www.diyautotune.com/news/res...-of-champions/

Do Miatas have brakes? I thought they just lifted.

[liam821]

That FreakyParts kit looks good, especially the 360 mm version. Would the only downside be increased unsprung weight?

ZCP/CSL 345mm rotor is around 20lb
E92M3 360mm rotor is around 22lb

Since the brake bias is pretty spot on using the 345mm rotors, I'd probably stick with that.

[liam821]

Not sure about the brake bias, but they also sell AMG 6-pot front caliper brackets...

https://freakyparts.co.uk/collection...per-adaptors-1

[r4dr]

ZCP/CSL 345mm rotor is around 20lb
E92M3 360mm rotor is around 22lb

Since the brake bias is pretty spot on using the 345mm rotors, I'd probably stick with that.

Is brake bias affected by the larger rotor diameter? It's the same caliper (so same piston sizes) using the same pads, isn't it?

One upside to me is that Girodisc makes E9X M3 fronts.

[liam821]

Is brake bias affected by the larger rotor diameter? It's the same caliper (so same piston sizes) using the same pads, isn't it?

One upside to me is that Girodisc makes E9X M3 fronts.

Yeah, a larger rotor will increase the front braking force. Think of it like this, the circumference (outside edge) of the CSL rotor is 2167mm, while the e92m3 is 2261. The pad is going to travel another 100mm for each rotation of the wheel.

[r4dr]

Yeah, a larger rotor will increase the front braking force. Think of it like this, the circumference (outside edge) of the CSL rotor is 2167mm, while the e92m3 is 2261. The pad is going to travel another 100mm for each rotation of the wheel.

Got it, thanks. 345mm it is then.