New Project

[Suprgnat]

Originally Posted by asbrr

Damn that looks nice...can you just start a business selling these as a kit (front and rear), I'd be your first customer

LOL, thanks! I spend so much time on cleaning, prep and masking there's no way I could sell them at a price that would net me a profit.

[andrey_gta]

What is this finish called? Crinckle black powedercoat?

[Suprgnat]

Originally Posted by andrey_gta

What is this finish called? Crinckle black powedercoat?

Wrinkle Black. Crinkle is close enough, may be only a regional difference in terminology.

[Suprgnat]

Almost ready to install. Just waiting on the Bimmerworld guide pins for the rear. Just for fun I cleaned up the anti-rattle clips that came with the calipers from the junkyard and had them electroless nickel plated to ASTM B733 Type I, SC3, Class 3 (went with a batch of other stuff at work). There's some texture where rust was removed (Evapo-rust, FTW), but they don't look too shabby for used clips (I also have brand new ones). I haven't powder coated the rears yet as I haven't sourced rear caliper carriers and I'm unwilling to have my car out of action while I go through the prep and paint process. When I finally get some I'll slap the original rear 40mm calipers back on temporarily and do the rear calipers and carriers together.
I also need to find a block of time to install it all.

[asbrr]

Man, this is tickling my OCD on so many levels....well done sir, well done.

[Suprgnat]

Today I found out that my 330I/Z4 57/24/330 brakes won't clear the barrels of my 17" Style 207M wheels. SMH

On sale soon.

[swagon]

Oh shit. Sell the wheels.

[Suprgnat]

Originally Posted by swagon

Oh shit. Sell the wheels.

Kinda want to stick with 17" wheels. I like the looks of the 207Ms, and I've been eyeballing OZ Alleggeritas or Leggaras.

[asbrr]

Originally Posted by Suprgnat

Today I found out that my 330I/Z4 57/24/330 brakes won't clear the barrels of my 17" Style 207M wheels. SMH

On sale soon.

OMG. Sorry to hear that, second time around - what a pain in the ass. I would've bought the whole package from you but I ended up getting grey BMW performance fronts as there was a good deal from a local guy....maybe just go with the factory setup to ensure it clears? I'm sure there's a used set somewhere, lots listed on car-part.com (for the front calipers). You could do a rebuild and have "as new" BMW perf BBK....

[Suprgnat]

Originally Posted by asbrr

OMG. Sorry to hear that, second time around - what a pain in the ass. I would've bought the whole package from you but I ended up getting grey BMW performance fronts as there was a good deal from a local guy....maybe just go with the factory setup to ensure it clears? I'm sure there's a used set somewhere, lots listed on car-part.com (for the front calipers). You could do a rebuild and have "as new" BMW perf BBK....

I certainly could have done the fit test before I did all the work, but doing the work was/is really a big part of it anyway. It was a fun project.

Maybe the sale of this set-up will go towards funding some rebuildable Performance calipers. We'll see.

[Suprgnat]

Decided to go the "130i" route. Stock front calipers with the 130i/330i carriers and rotors. Actually did a test fit first... Also rechecked my brake force/bias calculations and realized I forgot to factor in that the 128i has a 23.81 mm (15/16") front master cylinder versus the 135i 25.4 mm (1") front master cylinder. That means the stock 128i bias is 62.72/37.28, the 130i mod with the 42 mm rear calipers will yield a 63.19/36.81 bias with a braking force increase of 11.5% front and 10.25% rear. Like someone said, if you can get to the threshold 0.1 seconds faster, at 70 MPH that's 10.27 feet sooner. Whatever, I'm just doing this for fun anyway. Now to get the carriers stripped and re-plated.

[Kgolf31]

Originally Posted by Suprgnat

Decided to go the "130i" route. Stock front calipers with the 130i/330i carriers and rotors. Actually did a test fit first... Also rechecked my brake force/bias calculations and realized I forgot to factor in that the 128i has a 23.81 mm (15/16") front master cylinder versus the 135i 25.4 mm (1") front master cylinder. That means the stock 128i bias is 59.44/40.56, the 130i mod with the 42 mm rear calipers will yield a 59.92/40.08 bias with a braking force increase of 12.5% front and 10.25% rear. Like someone said, if you can get to the threshold 0.1 seconds faster, at 70 MPH that's 10.27 feet sooner. Whatever, I'm just doing this for fun anyway. Now to get the carriers stripped and re-plated.

So with this is your rotor up front larger and/or same size as OE?

Reason why I'm asking, is that in STX you're allowed to these upgrades as long as the above is valid. And if we're shaving 1 pound of unsprung mass, I'm all ears on what needs to be done.

[Suprgnat]

Originally Posted by Kgolf31

So with this is your rotor up front larger and/or same size as OE?

Reason why I'm asking, is that in STX you're allowed to these upgrades as long as the above is valid. And if we're shaving 1 pound of unsprung mass, I'm all ears on what needs to be done.

The fronts are +30 mm, at 330 mm.

Since I'm now sticking with the stock caliper and the larger aluminum-hatted rotor, mass actually goes up by 0.66 pounds per front corner. Had I'd been able to shoehorn the Z4/330i aluminum calipers in to my stock wheels, mass would have gone down by a little over 0.4 pounds per front corner in addition to more front bias (65.67/34.33) which is virtually identical to the BMWP brakes (with the 42 mm rear calipers).

(I have some Z4/330i calipers I'm not using, BTW)


Maybe the PFC 330 mm floating rotors would save some weight. Got a quote from Bimmerworld for only $863.98 for the pair (never hurts to ask...)
http://www.pfc.parts/product/328-073-8788/

[Suprgnat]

Originally Posted by Kgolf31

So with this is your rotor up front larger and/or same size as OE?

Reason why I'm asking, is that in STX you're allowed to these upgrades as long as the above is valid. And if we're shaving 1 pound of unsprung mass, I'm all ears on what needs to be done.

One other thought. If you stuck with the stock size rotor, but switched to the Z4/330i aluminum caliper, you'd knock 1.85 pounds of unsprung mass off of each corner and still increase front brake torque 11.4% (if that's desirable to you) because of the larger 57 mm piston.-

[Kgolf31]

Originally Posted by Suprgnat

One other thought. If you stuck with the stock size rotor, but switched to the Z4/330i aluminum caliper, you'd knock 1.85 pounds of unsprung mass off of each corner and still increase front brake torque 11.4% (if that's desirable to you) because of the larger 57 mm piston.-

Yea, I either have to stay same rotor size or larger.

The 330i aluminum caliper use the same pads or slightly difference because of the piston size? Stupid question, but I'm assuming it's a new pad size?

Just thinking on how it would pair with the rotor.

[Suprgnat]

Originally Posted by Kgolf31

The 330i aluminum caliper use the same pads or slightly difference because of the piston size? Stupid question, but I'm assuming it's a new pad size?

Pads are the same P/N across most of the aftermarket manufacturers, though BMW has different P/Ns for everything. I bought the Stoptech Street Performance for the Z4/330i calipers and will be using them on the stock calipers when I swap in the new front rotors, carriers and rear calipers, SS lines, etc.

FSMI D1061

[Blacksport]

Originally Posted by Suprgnat

Kinda want to stick with 17" wheels. I like the looks of the 207Ms, and I've been eyeballing OZ Alleggeritas or Leggaras.

Wow, that hurts...can't believe the 330 set-up wouldn't fit the 17's...you did all that work, and they would've worked great on a 128...

Hey, beauty is in the eye of the beholder; you like the 207's, and that's your choice, but I'd dump them on ebay and pick up some 18 Leggaras...

Here's a shot of the M Roadster with Superleggeras...

[Suprgnat]

Originally Posted by Blacksport

Wow, that hurts...can't believe the 330 set-up wouldn't fit the 17's...you did all that work, and they would've worked great on a 128...

Hey, beauty is in the eye of the beholder; you like the 207's, and that's your choice, but I'd dump them on ebay and pick up some 18 Leggaras...

Here's a shot of the M Roadster with Superleggeras...

Actually, I want another set of 207Ms AND the OZs. 17x8 for the 9+ months of the year that are beautiful in California, square up a set of the 7 1/2" 207Ms with performance all seasons for our "winter", and the 7" 207Ms with winter tires for the once or twice a year I really need them.

[andrey_gta]

@Suprgnat real surprised to lean the 330i/Z4 route didn't pan out
Your work is so good on all these kits. Hope 130i route fits your needs

[Suprgnat]

Originally Posted by andrey_gta

@Suprgnat real surprised to lean the 330i/Z4 route didn't pan out
Your work is so good on all these kits. Hope 130i route fits your needs

The stock brakes work fine. I'm just having fun! (But I did verify they fit this time)

[Kgolf31]

Originally Posted by Suprgnat

Pads are the same P/N across most of the aftermarket manufacturers, though BMW has different P/Ns for everything. I bought the Stoptech Street Performance for the Z4/330i calipers and will be using them on the stock calipers when I swap in the new front rotors, carriers and rear calipers, SS lines, etc.

FSMI D1061

Correct me if I'm wrong but the Z4/330i caliper with OE rotors didn't clear your wheel? Question because I still drive on those wheels to/from events.

[Suprgnat]

Originally Posted by Kgolf31

Correct me if I'm wrong but the Z4/330i caliper with OE rotors didn't clear your wheel? Question because I still drive on those wheels to/from events.

The Z4/330i calipers won't clear the barrels of 207Ms with the 330 mm rotors. I didn't try it with the stock 300 mm set up, but suspect they'd fit just fine. PM sent.