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20'' of vacuum?

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Old Jan 6, 2007 | 09:58 PM
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Default 20'' of vacuum?

i just hooked up my boost/vacuume gauge on my 408 d1sc and at idle it has about 20'' of vacuum.... does that sound right to you guys?
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Old Jan 6, 2007 | 09:59 PM
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I run about 14" 15" me thinks
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Old Jan 7, 2007 | 01:13 AM
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20'' is right for a motor with a stockish cam. I rarely see that in a motor with a cam in it, unless the cam is small or the idle is turned up to the point the car doesnt lope much.
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Old Jan 7, 2007 | 05:01 AM
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im at 19 or so with a small cam
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Old Jan 7, 2007 | 12:33 PM
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15 at idle small cam and 25-26 at cruise...
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Old Jan 7, 2007 | 12:35 PM
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15-20... depends on your cam
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Old Jan 8, 2007 | 10:15 AM
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This might sound rather dumb, but where are you guys buying these guages and where are you hooking them into to check Vaccum?????
I wouldn't mind checking mine, lol
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Old Jan 8, 2007 | 10:52 AM
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boost guage should show vaccum for you. It will be a negative number.
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Old Jan 8, 2007 | 11:26 AM
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Originally Posted by ty_ty13
i just hooked up my boost/vacuume gauge on my 408 d1sc and at idle it has about 20'' of vacuum.... does that sound right to you guys?
That is damn good vacuum for that cam... bet it idles nice
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Old Jan 8, 2007 | 12:00 PM
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am i the only 1 who has no where near that vacuum?ive got about 8-9 on my 22X/22X 383 turbo
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Old Jan 8, 2007 | 12:45 PM
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I have 9# of vac at idle with 7# procharger ,stock cam.
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Old Jan 8, 2007 | 01:15 PM
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Originally Posted by SideStep
That is damn good vacuum for that cam... bet it idles nice
it has no lope at all.... it idles at about 900rpm though....i'm working on getting it down to 750-800rpms once i get my new exhaust put on and it warms up a bit...
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