New Massive brake kits for e30s

[pussy]

Hi Lee

thanks for your email.

check the templates on my borbet's A 16"x7.5j with the offset 20 and the street kit with the DNL calipers clears it.

my friend will be in contact with you on the order.

many thanks.

regards.

waffleswaffleswaffleswaffleswaffles@felix

[Massive Lee]

Glad it works. I was supposed to get a batch of street hats today as the machine shop sent me a lot of stuff. But no hats. They are due for later this week.

I am currently developping several other projects, including rear 11.75" x 0.81" brakes for e30s (I already have a rear kit for e30 M3s with huge 12.2" x 1.25" discs). The rear ee30 M3 kit comes in two flavor. 4 piston radial mounted 4R/ST caliper ($$$$$) or more affordable 4 pistons lug mounted Superlite forged caliper. here is a development picture. Note that those are not the proper fasteners.



With radial mounted caliper. In this photo only, using an SL6R for prototyping.

[ron k]

Lee,

I have bee following this thread with a lot of interest since I have been looking for a high quality brake upgrade for my 89 325i. It is a street car but I do take it to the track as much as I can manage.

While I am no brake expert, I have been reading High-Performance Brake Systems: Design, Selection, and Installation by James Walker (great book BTW) and I wondered if you had any info you could share vis a vis your street setup on a stock (well, I do have the 25mm master cylinder) E30 brake system. Specifically what happens to the brake balance and system gain as compared to stock.


Thanks,

Ron Kirkland

[Massive Lee]

Basically, on a stock or custom set-up, going to a bigger MC will not affect front-to-rear bias. It will only affect the hydraulic ratio of effort vs pedal travel. Most street drivers will not care about a long pedal travel but they do not want to apply to much strength on the brakes. This will require a smaller MC. At the opposite, racers would rather apply a lot of pressure (like pressing on a brick wall) for increased modulation, and do not want pedal travel. This is why a bigger MC would be better.

When upgrading to bigger brakes, if you have a smallish MC, I would go wiith calipers that have 1.38" pistons. This diameter reduces a bit the hydraulic strength of the front, and will slightly increase the rear one, but the bigger discs will bring back the front-to-rear overall bias. THis will work wether you have a big or small MC.

Racers who upgrade the front brakes should select calipers with 1.75" pistons as they will also soon upgrade the rear brakes with 4 pots calipers with 1.00" or 1.12" pistons.
There is no universal solutions, just a few rules.

[ron k]

Seems like it would be a good idea to get the 1.75" pistons if there was a possible upgrade to the rear brakes down the road. A brake bias valve to go along with it I think would make it perfect.

Ron

[Massive Lee]

Seems like it would be a good idea to get the 1.75" pistons if there was a possible upgrade to the rear brakes down the road. A brake bias valve to go along with it I think would make it perfect.

Ron

There is indeed some rear bbk in development. For the e30 M3 we already have 12.2" x 1.25" rotors and aluminum hats. This is a race set-up, along with 4 pot calipers. That is massive. For cars requiring emergency brake, we have designed an add-on that allows the safe use of the ebrake. It is a steel ring/drum that bolts to the back of the hat.





For the e30 318-325, I am contemplating installing a smaller 11.75" x 0.81" rotor on a steel hat (to allow ebrakes), but it I cannot find the proper rotors, unless I have them custom made to a stock e30 rear disk turned on a lathe into a hat. The rear M3 set-up will probably be too expensive for most e30 owners as the steel rings cost $250usd/pair and my profit is minimal on those. anyway, visit our website for more info on products.

[kowalski]

if you send me the dimmensions for that i can probably get them made for you for cheaper then 250$ for a pair. (my brother owns Ketch machining)

[Massive Lee]

if you send me the dimmensions for that i can probably get them made for you for cheaper then 250$ for a pair. (my brother owns Ketch machining)

Thanks for thre tip.

[IS]

Lee, do you (or anyone else) have measurements for the size of the caliper pistons on the stock 325 brakes f/r? Thanks.

[Massive Lee]

Ø48mm for the regular e30
Ø54mm for the M3

Surface is (Diameter/2) sq. x 3.1415= surface in mm2

[Massive Lee]

Here is a close-up shot (before being sent to anodizing) of the hat for the e30 street kit. It is deeper than the race kit. Obviously, it is the wrong rotor that has been shot as I did not have anymore of the slimmer 0.81" street rotor. It is not possible to install the thick 1.25" rotor on the street hat as it would contact the strut.

[Massive Lee]

Martin, a client from UK, sent me a few pictures of his e30 M3 kit. He used 17" wheels with et20 and added a 3mm spacer. Pictures and feedbacks from clients are essential in perfecting or improving the products. Per exemple, knowing that Martin only needed 3mm spacers to fit the wheel, I will probably push the rotors 3mm inward on the next batch or hats. This will require that I include two stainless steel heatshield to be bolted on the steering arm to protect the balljoint from the radiant heat. I currently designed the hats to push the rotors 10mm away from those rubber boots. 3mm closer means they will be only 7mm away. Now, those boots will need protection. BTW I am not kidding when I mentionned that boots may melt... Initially, the e30 M3 kit was designed to accept 35mm rotors (1.38") for hardcore racers. But it seems that the market is satisfied with 32mm ones (1.25").

[Tom944]

Lee,

Quick question that we want to check first (before ordering):

- would your 325 race kit clear a strut with the H&R Cup kit? (we had some clearance issues with a few wheels that we were able to solve by using a small spacer, but we cannot spacer the brake kit).

We have some pictures of the actual installation of the kit on our car here:

http://www.rtb-motorsport.nl/e30onderstelvoornld.html

I think the first and last picture should help.

Hope you can help?

BTW the kit is cheaper in this topic than on your site - coincidence?
(trust a cheap Dutchman to notice this...)

[Massive Lee]

Hi Tom.

if your H&R struts have the same specs as the stock struts (which they should have) then the thick disc will clear the steering ball joint's boot by about 4 to 5mm. If you race, I suggest that you bent a tiny piece of stainless steel or aluminum, and make it a heat shield to protect the rubber boot.

300mm x 32mm is more than enough for a race car.

Pricewise, the quoted prices on r3vlimited are a temporary promotion until end of February. So, just let me know if you prefer to pay the forum's lower price, or the regular website price...

If you are in the Netherland, I can only ship (for now) the installation kits. You must order the calipers/rotors/pads from RallyDesign.co.uk in Great Britain. They are too heavy/expensive to ship from North America, until I find a cheaper way. If I had a European agent, then I would simply ship a whole pallet of kits and rotors/calipers for $500. Individually, cost is $250 for a whole kit, or around $105/$110 for the installation kit.

[Massive Lee]

Hi everyone

Back from last night's BMW chapter meeting, I made the sad discovery that my hard disk had crashed. If you previously emailed me about an order on the gmail account, I still have the data. If you enquired on my personal account at l.vuong@sympatico.ca, then I lost your trace. I have back-ups for all technical drawings but will need to rebuild the whole content of the hard disk.

I will pick six e30 stret kits from the anodizing shop on Wednesday, and will contact those of you from whom I have info. If you have reserved a set, please get in touch with me at massivebrakes@gmail.com

So, 6 street kits are now available, and 10 race kits will be available in 2 weeks. Then , we will go in full Spring production for the e36 and e46 kits.

Sorry for the inconvenience.

Lee