brake peddle

[jurassicwadey]

so I got myself a e30 which was already converted to a m30b35- which I love!

but there are a few issues, one being the brakes- are 325 brakes sufficient for the m30 conversion?

and secondly, when I do brake the peddle doesn't return all the way- leaving the brake lights on- is the servo knackered? anyway to test this?

[motormanmick]

Hello jurassicwadey,

Saw your post went unanswered, had some spare time to do some digging, I've searched on Alpina e30 b6 3.5, South Africa e30 333i, found only that they where fitted with uprated bakes but no dimensions, Harge e30 h35 evidently has the same as the Alpina and not sure about the 333i, Harge dimensions below. So, answer to you question is No, the performance tuners all went bigger, likely due to increased power and weight.

So you could go 5 stud conversion, or a brake kit for the front, it will depend on you rim size, I did find that these cars where fitted with 16 in wheels, www.300mm.de does kits for 4 stud 300mm x 24 with Porsche 986 saddle, cheers.

f brake size 54 x 295 mm / 2.13 x 11.6 in
r brake size 33 x 258 mm / 1.3 x 10.2 in

Read more at http://www.supercars.net/cars/6124.html ... LS0tWC8.99

[Rav335uk]

325 brakes are upto the job, i've had those on my cab with no issuses, but it depends on how you drive,
What we need to know is
1. it the servo the origional E30 one, or
2. Is it a clio.

If it's the latter, then you may need to alter the rod in the servo

[ross_jsy]

Get under the dash on the passenger side and crack the locking nut off the brake bar that runs across the bulkhead, do the same on the drivers side then adjust the rod by turning it until the pedal raises enough to contact the switch. Start the car, pump the brakes a few times and check it is still ok with the engine running.

[jurassicwadey]

Cheers for the response's guys!
im a little unsure what servo is currently in the car- I would guess at original by first glance.
Rav my driving style is mild, but can get a little more spirited every now and then!

will have a look at the braking bar and make some adjustments- if that fails ross, is my next step changing the servo?

[ross_jsy]

I would confirm if it's a standard servo or not. Clio servos and the like require a spacer between the servo for and MC.

I personally don't think standard brakes are up to the job. I used to blitz the standard ones with a b25. That was with updated lines, pads and discs. On my daily (which I'm about to stick an m30 in) I have RX7 4 pots, and on my track car I have WMS 4 pots

[jurassicwadey]

well have been pestering Keri at WMS for brakes, but seems to be a long. my plan was to change to 4 pot fronts and 2 pot rears, all new lines- change the servo, happy in the knowledge that my braking system is more than man enough for the task.

Have seen wilwood 4 pots but hear mixed reviews about them.

[ross_jsy]

My friend is using Wilwoods, they are OK with a e32 (iirc) master cylinder

[Rav335uk]

You could try 540 front caipers

[rob0r]

During my first M30 swap I thought I had to smack the hell out of the bulkhead to make room for the engine, I was not only wrong, I actually caused the bulkhead to touch against the brake bar that runs along behind it. As such it caused drag and the need to flick the pedal back fully up. Maybe this is the cause.

I don't actually know where my first M30 conversion ended up, yours isn't G891 LGT by any chance??

[jurassicwadey]

^^^ no not mine