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Thread: braking issue
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06-03-2009 #2
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My opinion is that the factory 1-1/8" bore master cylinder is too large for the new, smaller piston area front calipers (~4.5 square inches) versus the factory OE calipers with 2-15/16 pistons and 6.78 square inches of area. The SSBC calipers have the same size pistons as the 98-02 LS1 F-body applications. Those cars use a 1" bore MC and dual 9" diaphragm vacuum booster from the factory...not to mention typically make plenty of vacuum to function properly. A dual 8" booster gives close to the same boost as a single 11" booster and the dual 9" booster gives aproximately 30% more boost than each of those.
What vacuum levels do you get at your booster? Some electric vacuum pumps don't do a very good job supplying the necessary vacuum or volume required.
Tobin
KORE3It's what I does.
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