New lantra cam and vacuum
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Joined: Sep 2001
Posts: 10,795
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From: Pflugerville, TX
Vehicle: 2000 Elantra
New lantra cam and vacuum
The new cam (according to Red's recent post) dropped his vacuum 3-4 inches. Was that enough to noticeably affect the functioning of the brakes?
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Joined: May 2001
Posts: 11,851
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From: Rancho Palos Verdes, CA
Vehicle: 2008 Toyota Prius 2006 Suzuki SV650S
Just a note here for turbo folks while we are on the subject of vacuum. I have a braking problem with my tibby.
While accelerating under full boost, if someone cuts me off, and I am forced to get on the brakes quickly after a full boost acceleration, the brakes are significantly weaker. With boost vs vacuum in the system, the brakes are MUCH weaker. The other problem is that the brakes then get stronger after the turbo spools down and vacuum builds. If you don't lift your foot up off the brake pedal slightly, you will end up slowing down MUCH faster than you had intended. There appears to be a 2-3 second delay involved.
to fix the problem, I plan on installing a "vacuum chamber" with a 1 way valve on it to "store" vaccum. Hopefully this will solve the problem.
While accelerating under full boost, if someone cuts me off, and I am forced to get on the brakes quickly after a full boost acceleration, the brakes are significantly weaker. With boost vs vacuum in the system, the brakes are MUCH weaker. The other problem is that the brakes then get stronger after the turbo spools down and vacuum builds. If you don't lift your foot up off the brake pedal slightly, you will end up slowing down MUCH faster than you had intended. There appears to be a 2-3 second delay involved.
to fix the problem, I plan on installing a "vacuum chamber" with a 1 way valve on it to "store" vaccum. Hopefully this will solve the problem.
