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Brakes not holding at staging light

Old 03-31-2012, 04:37 PM
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Default Brakes not holding at staging light

I am sure this issue is on here, but after searching for the past hour I can't find the answers I am looking for, so you have to forgive me if this is a common issue/ topic.
Anyway, car facts: 98 Trans Am with slotted rotors, hawk pads, stock calipers, 3400 stall, MT Drag radials. My brakes are not holding at the staging light when I load the car, so I don't load the stall as much, so I don't roll, etc.
After bleeding the brakes a few times, my braking issue still persists. I can't see it being a brake caliper issue as all four are fine. I unhooked the ABS and the issue still happened. I am starting to think I may have a brake master cylinder issue, but I am not sure.
Any thoughts would be appreciated.
Thanks
Old 03-31-2012, 04:48 PM
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Any aftermarket stall can push through the brakes at the track on an ET Street. How is the actual braking performance of the car?
Old 03-31-2012, 05:20 PM
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The braking performance of the car seems to be fine when I drive around town and on the highway.
Old 03-31-2012, 05:22 PM
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your brakes are fine. you dont need to brake torque the car so much that it pushes through the beams anyway. my car gets the best 60ft times launching at around 1500 rpm.
Old 03-31-2012, 05:34 PM
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So question then, if I put in a bigger converter will it let me load up to a higher RPM before the brakes start to push?
Old 04-01-2012, 08:19 AM
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Most likely yes it will.
Old 04-01-2012, 01:09 PM
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^^^agree.
higher stall = more slippage = higher rpm before it pushes thru brakes.
also means higher flash rpm = higher convertor 'engagement'.
Old 04-01-2012, 04:57 PM
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That's good to know as I was looking into a higher stall and possibly a trans lock. Thanks for the info.
Old 09-03-2018, 10:05 PM
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I used a 2010 Camaro lfx v6 electric vacuum pump to help the booster with a micro controller but, for drag, you could hook up a switch easy:

Initial test:


Full test (waited until pump shuts off after 4 minutes):


if you need brake booster vacuum...

-Don










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