Spongy pedal after StopTech install

paradocs98 · 03-14-2011, 09:59 PM

Just picked up my car tonight after a StopTech ST60/ST40 380/355 BBK installation. LOOKS great on the car, but the pedal feel is horrible. Probably an inch or so of dead zone at the top of the brake pedal travel, and then a spongy feel. Car still brakes safely and forcefully once the pedal is really down, but it's difficult to modulate the pedal given the dead space followed by sponginess. This can't be right--tell me it's air in the system or something easily rectified. The shop that did it is a well-regarded place with a loyal following, and they did the full StopTech-recommended bedding-in procedure after installation this afternoon.

rzm3 · 03-14-2011, 10:38 PM

http://www.m3post.com/forums/showthread.php?t=496301

garek · 03-15-2011, 01:00 PM

If the pedal fees spongy, my guess is that you need to bleed the brakes.

After I installed my Stoptech BBK, the pedal is actually much firmer than with the stock brakes.

BayerischeMotorenWerke · 03-15-2011, 01:21 PM

My Brembo BBK made the pedal MUCH firmer. You definitely have air in the lines.

Beedub · 03-15-2011, 01:43 PM

ap racing BBK and the pedal is so firm i actually thought something is wrong...... lol

tiny little give at the top then firm firm pedal.

the only way i get even get a remotely softer feel is to very slowly depress the pedal while the car is stationary...... the quicker i hit the middle pedal, the harder the feel.

im running pagid blue which i believe Add to this firm feel

03-14-2011, 09:59 PM	#1
paradocs98 Lieutenant Colonel 394 Rep 1,519 Posts Drives: M2C Join Date: May 2009 Location: NY iTrader: (0)	Spongy pedal after StopTech install Just picked up my car tonight after a StopTech ST60/ST40 380/355 BBK installation. LOOKS great on the car, but the pedal feel is horrible. Probably an inch or so of dead zone at the top of the brake pedal travel, and then a spongy feel. Car still brakes safely and forcefully once the pedal is really down, but it's difficult to modulate the pedal given the dead space followed by sponginess. This can't be right--tell me it's air in the system or something easily rectified. The shop that did it is a well-regarded place with a loyal following, and they did the full StopTech-recommended bedding-in procedure after installation this afternoon.
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03-14-2011, 10:38 PM	#2
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	http://www.m3post.com/forums/showthread.php?t=496301
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03-15-2011, 01:00 PM	#3
garek Second Lieutenant 10 Rep 287 Posts Drives: 09 E90 M3 DCT Join Date: Apr 2006 Location: Arizona iTrader: (0)	If the pedal fees spongy, my guess is that you need to bleed the brakes. After I installed my Stoptech BBK, the pedal is actually much firmer than with the stock brakes. __________________ ///M3 E90 '09 Le Mans Blue \| DCT \| Silver Novillo \| Tech \| Prem \| 19"s \| Prem Sound \| iPod StopTech BBK \| Volk VR.G2 \| H&R Sport Springs
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03-15-2011, 01:21 PM	#4
BayerischeMotorenWerke Second Lieutenant 7 Rep 259 Posts Drives: slowly and carefully Join Date: Jun 2008 Location: Motel 6 iTrader: (0)	My Brembo BBK made the pedal MUCH firmer. You definitely have air in the lines.
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03-15-2011, 01:43 PM	#5
Beedub Major General 423 Rep 5,329 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	ap racing BBK and the pedal is so firm i actually thought something is wrong...... lol tiny little give at the top then firm firm pedal. the only way i get even get a remotely softer feel is to very slowly depress the pedal while the car is stationary...... the quicker i hit the middle pedal, the harder the feel. im running pagid blue which i believe Add to this firm feel __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
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