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Brake pedal problem

Old 07-20-04, 11:01 AM
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Brake pedal problem

Does anyone know if the brake pedal can be adjusted a bit ?
I mean - while pressed, it goes too deep for successful heel-toeing (sidestepping technique). This can become quite dramatic when downshifting to 2nd gear at the track (i.e. rears blocking up, etc).

How does everyone else go around it ?

I never had such problems in my other daily cars (mostly Hondas) - usually there the brake pedal sits a bit higher then gas pedal so when braking the height of the brake pedal is just right to blip the gas.
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Old 07-20-04, 11:05 AM
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Are you using SS brake lines? That will firm up the pedal a bit.
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Old 07-20-04, 11:09 AM
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When I added SS lines to my car it dramatically increased the brake feel and travel. Now when fully depressed it's still even with the accellerator and makes for a great heel-toe position. Now if I could only get that last pocket of air out of the lines....
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Old 07-20-04, 11:20 AM
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Originally Posted by Section8
Now if I could only get that last pocket of air out of the lines....
http://www.motiveproducts.com/
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Old 07-20-04, 11:29 AM
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Originally Posted by Mahjik
I've heard about them, have you used this system? Does it work well? The only other one I've seen is the Griot's Garage pressure bleeder and it's $$$$$!
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Old 07-20-04, 11:42 AM
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Smile

Originally Posted by Section8
I've heard about them, have you used this system? Does it work well? The only other one I've seen is the Griot's Garage pressure bleeder and it's $$$$$!
Yep, it works wonders. A buddy of mine has one and I've been using his. I ordered one for myself over the weekend. It's a must if you plan on tracking your car a lot (switching pads, bleeding/pressurizing the system, etc).
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Old 07-20-04, 11:46 AM
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SS brake lines arent high on my list atm. I just thought if I could move the pedal a bit higher or something.
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Old 07-20-04, 11:47 AM
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Originally Posted by Mahjik
Yep, it works wonders. A buddy of mine has one and I've been using his. I ordered one for myself over the weekend. It's a must if you plan on tracking your car a lot (switching pads, bleeding/pressurizing the system, etc).
Exxxxcellent. I'll order one ASAP
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Old 07-20-04, 01:19 PM
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I don't know what year RX-7 you are driving but FDs and FCs have an adjustment on the pushrod that goes from the brake pedal to the master cylinder. You have to loosen a jamb nut and turn the rod to change the length exposed. Don't crank it too much otherwise you will have a dragging brake situation.
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Old 07-20-04, 04:49 PM
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One my first gen I just bent the gas pedal to match.

-Trent
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Old 07-21-04, 01:01 AM
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Pushrod adjustment seems to work, there was a thread on it a while back.

I'm planning to adjust it this weekend, myself. Apparently after you adjust it, start the car with it on jackstands, and make sure the brakes aren't dragging. The engine has to be running because the vacuum on the brake booster can affect things. I just drove an RX-8 and the pedal feel was wonderful - touch the pedal and the brakes applied. I want that or something close in my '7.

-=Russ=-
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Old 07-21-04, 05:21 AM
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Hmm... can someone please elaborate on this pushrod adjustment ? A pic would be awesome

I do not quite understand what needs to be done.

By dragging brakes, do you mean brakes are constantly applied ?
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Old 07-21-04, 06:23 AM
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In the attached picture you will see what I am talking about. The rod that you turn is forward of the jamb nut. Once the jamb nut is loose you can turn the rod. Turning the rod threads it out of that clevis extending it towad the master cyclinder making the pedal application sooner.
Attached Thumbnails Brake pedal problem-brakerod.jpg  
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Old 07-21-04, 08:57 AM
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How nice !!

Thanks mate.
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Old 07-21-04, 11:11 AM
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Well, I'd been planning to do it at the master cylinder end... any adjustments there? Specifically, I was unable to get that locking nut freed up. It's on there TIGHT, and I was afraid of breaking the pedal mounts.

-=Russ=-
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Old 07-21-04, 01:02 PM
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Get some PB Buster and soak the nut with it for 30 min or so. It should break loose then.
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Old 07-29-04, 11:18 AM
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I have just ordered the speedbleeders (what an easy transaction) to do a proper bleeding myself and see how much of a lousy job my mechanic did on last fluid change
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Old 08-14-04, 07:30 AM
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PaulyDee, I just did this pushrod adjustment - indeed a 5min work - and it turned my brakes into what they should be. Little dead travel, and when brakes are fully applied brake pedal is still above the gas pedal, thus allowing me to heel-toe easily.

Not to mention that my mechanic did a lousy job at replacing my brake fluid. He put in my ATE Super Blue and before there was some old yellow fluid in there. When I installed speed bleeders, guess which color of brake fluid came out ? The yellow one... the old fluid.

And I was wondering why I kept on boiling the fluid on the track

Anyway, I installed speedbleeders and bled the brakes with fresh ATE Super Blue.

With the new toe-link in right rear and new straight through exhaust next track event will be interesting. I think I will be able to finally be faster then those BMW M's
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