braking under boost - Boost Forum

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braking under boost
Monday, November 13, 2006 7:44 PM
My question is for those guys who drag race. Do our master cylinders hold enough vacume to rev. the car and hold the brakes, or once you hold the brakes for so long do they just fade away? I assume i need to put a check valve in between my cylinder and my intake so it doesn't see boost


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Re: braking under boost
Monday, November 13, 2006 7:48 PM
I never had problems brake torquing on my auto with boost.





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Re: braking under boost
Monday, November 13, 2006 8:08 PM
There is supposed to be a check valve in the brake booster line. Yours might be busted...


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'96 Cavalier Good ol' Pushrod 2.2
-24X,000 miles on factory build
-Some oil loss between changes, me thinks it be rings.
Re: braking under boost
Tuesday, November 14, 2006 3:46 PM
Thanks Guys... David are you saying that from factory there should be a check valve built into the master cylinder or that i need to put one in the brake booster line?


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Re: braking under boost
Tuesday, November 14, 2006 4:10 PM
I can sit at full boost without moving by brake torquing.


- 93 mph in the 1/8 mile
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Re: braking under boost
Tuesday, November 14, 2006 4:18 PM
w/ the s/c I dont think i'm boosting when btake torquing.



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- Sold my beloved J in April 2010 -
Re: braking under boost
Tuesday, November 14, 2006 7:09 PM
OK but do i need a check valve between the cylinder and the manifold


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