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Reply to "Mechanical vs Vacuum Secondaries"

Now for the kicker. Driving a ZF with 4th gear overdrive & even deeper 5th gear, you have to drive differently. For example if you're in 4th or 5th gear at 15-18-2000 RPM & stomp it, the car won't take it. No good. With vacuum secondaries you can stomp it anytime and let the engine vacuum do the work. Making MORE power and no bog. With mechanical secondaries you have to be within the power band when you kick it.

Race cars love mechanical secondaries, they run W.O.T from the word go. Punch it, let the clutch fly. Last time I saw a customer do that in front of the shop in a blue chrome bumper car, a rod came through the side of the block just forward of the starter. We call 'em windows. You could drop a baseball through the hole.

Now you understand the dynamics of each so you can choose accordingly.

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