BMW 2002 FAQ - The "race pedal box"

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Date: 7-5-08 01:36
From: Lee in Montreal

Subject: The "race pedal box"

I always found that the two extra linkages between the brake pedal and the master cylinder was a source for slack and feeling of "remoteness".

There fore, I have started fabricating a pedal box where the MC is bolted directly on it. Therefore I acquired a pedal box, emptied it and ground the upper section. Then, measuring the distance between the two pedal stems, it was clear it was not enough to clear the brake MC and the clutch MC. The brake pedal could not move to the right because of the throttle rod. Therefore the clutch pedal had to move to the left. All it took was to remove 15mm from the metal sleeve/pivot, and from the nylon sleev, leaving the inner steel sleeve intact. An aluminum bushing with 14,1mm ID and 15mm width will keep the pedals apart. Then I drilled a hole on the pedal stem, about 32mm away from the pivot, which gives a 6:1 pedal ratio (pedal is 195mm long). I used one of the clevis to make the linkage. Next step is to fabricate a monting plate for both MCs, from 1/4" steel, cut the back of the pedal box, and weld the plate.

The intent of such fabrication is to bring more feel in the brake pedal, make the car a bit lighter at te front for the S14, and clear the fiberglass DTM airbox. The car is a track car only driven on public road to go to the events.

Picture coming soon.
_________________

Brake harder. Go faster.

Date: 7-5-08 02:33 From: instructorbill Subject: Re: The "race pedal box"
ooohh pictures please, what master cylinder, details!!! No booster too I'm guessing. _________________ Make it different... or just do it differently Bill in Petaluma, CA 1969 1600 The current distraction 1970 2002 RIP -- crashed then quartered 1971 2002 M20/02 RIP -- nothing but pieces now 1972 2002 gone, but not missed POS

Date: 7-5-08 10:03 From: peteinjp in Toyama, Japan Subject: Re: The "race pedal box"
Lee, Excellent description. If your going to all the trouble why not incorporate a balance bar? P.S. I put the cover on the s14 cam box- super slick! Thanks again! Oh and I forgot to ask but if you still have a set of Motor Mount brackets I'd love to get them off you. I'll use them to fit the s14 on a spare subframe and check out what needs to happen to the oil pan. Pete

Date: 7-6-08 12:17
From: NickVyse in Provence, France

Subject: Re: The "race pedal box"

I've finally sourced a decent shell to re-shell my Touring and I'll be using the RHD pedal box fabbed into the LHD bulkhead. As you probably know RHD pedals hang from under the dash - they have only one pivot point and operate direct to the MC, and you can then mount the remote servo where you like.

Having driven both types of pedal for sometime I think the RHD feels much better all round, even the arc of action just seems more 'right' if you'll pardon the pun.

Mine will be a road car not a track car so you may have different priorities - but it's food for thought.

Nick
_________________
1973 m2 Touring - RHD. Asleep dreaming of a new body
1967 1600-2 LHD. Daily use
1967 1600-2 LHD. Parts car
1972 2002Tii LHD. Resto project

Date: 7-6-08 04:07
From: Lee in Montreal

Subject: Re: The "race pedal box"

Hi Pete

When I boxed your parts, I couldn't remember what was missing. Damn, now I know. The set of engine mounts. Please post a picture of the installed block-off plate. I just got te S14 and need to de-gunk it and make a thorough inspection before I can install the plate.

In regard of the MC spacing (clutch and brakes) I measured I needed 62mm center to center. The relocated clutch pedal allows me to get 64mm. Only 2mm will separate the two MCs.

BTW I am using a single MC to make things simple. The way the caliper pistons are sized, it will be okay.

Lee
_________________

Brake harder. Go faster.

Date: 7-7-08 01:46 From: peteinjp in Toyama, Japan Subject: Re: The "race pedal box"
Yeah i forgot about it too- until you posted about cutting up the oil pan.... I'll get a shot of the plate installed soon. It looks too cool..... Not sure how I got the idea that you were going towards a double master setup. I'd love to see a pic when you have it all done.

Date: 8-12-08 04:58 From: Todd21 in Norris, Tennessee Subject: Re: The "race pedal box"
Lee, Where is the picture for this mod? I'd like to get a look at it. Thanks, Todd

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