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Cobra Forums
The Terminator
Engine/Tuning
Vacuum at idle with cams??
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<blockquote data-quote="IUP99snake" data-source="post: 12193146" data-attributes="member: 7060"><p>Are you sure you don't have a vacuum leak with the PCV valves or something? That's typically what you see when you have a vacuum leak. And with aftermarket cams, it's even harder to notice you have a vacuum leak because a leak makes the car lope even with stock cams. </p><p></p><p>So, your car might actually be loping more than it should be even with the aftermarket cams. </p><p></p><p>There should be 20 in/hg of vacuum at idle with stock cams. </p><p></p><p>With aftermarket cams with the idle set to around 1000 RPM, it should still pull at least 10 inches of vacuum. Anything less than that, and I'd start looking for leaks somewhere. </p><p></p><p>I hate vacuum leaks by the way. </p><p></p><p>Homer</p></blockquote><p></p>
[QUOTE="IUP99snake, post: 12193146, member: 7060"] Are you sure you don't have a vacuum leak with the PCV valves or something? That's typically what you see when you have a vacuum leak. And with aftermarket cams, it's even harder to notice you have a vacuum leak because a leak makes the car lope even with stock cams. So, your car might actually be loping more than it should be even with the aftermarket cams. There should be 20 in/hg of vacuum at idle with stock cams. With aftermarket cams with the idle set to around 1000 RPM, it should still pull at least 10 inches of vacuum. Anything less than that, and I'd start looking for leaks somewhere. I hate vacuum leaks by the way. Homer [/QUOTE]
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Vacuum at idle with cams??
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