stock vaccum at idle/stock boost
09-22-2005, 06:59 AM
#1
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stock vaccum at idle/stock boost
I just added a boost gauge and i was wondering what was normal.
i see about 12-13 inches at idle, and at max boost i see about 7psi, maybe 7.5
stock except for a k&n filter.
thanks
i see about 12-13 inches at idle, and at max boost i see about 7psi, maybe 7.5
stock except for a k&n filter.
thanks
09-22-2005, 07:05 AM
#2
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seems low....
esp the vac. i see 23-24 in/hg at idle, but im hgher than most it seems, normal ive seen is 17-20. and when i was stock id see a 10-11 psi spike and it would settle in at 7-8.
oh and what year are you? if you are '01 or '01.5 i belive stock boost is higher (170 hp engine) its a 12-13 psi spike with a 10-11 psi hold IIRC.
sounds like you might have a small boost leak?
oh and what year are you? if you are '01 or '01.5 i belive stock boost is higher (170 hp engine) its a 12-13 psi spike with a 10-11 psi hold IIRC.
sounds like you might have a small boost leak?
09-22-2005, 07:09 AM
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I believe you have a leak, those numbers aren't what they should be
I see about 25-30Hg/in at idle. And stock boost should be between 8-12 at WOT. I cna't remeber the exact numbers but those are off so I'm saying you have a leak. Time to trace your lines!
09-22-2005, 07:17 AM
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?
you cant do ... then not put anything in the message field!!!!
or did that just mean to read your above post? lol
you get 25-30 in/hg at idle? i thought mine was high at 24.
or did that just mean to read your above post? lol
you get 25-30 in/hg at idle? i thought mine was high at 24.
09-22-2005, 07:21 AM
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Those seem a bit high, unless your well below sea level
or increased your CR to about 10:1 or higher. Stock vac should be around 20 and during coasting in gear it should be 25. But #'s will change with elevations.
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09-22-2005, 07:33 AM
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i get 23-24 at idle and 28 or so coasting in gear....
im right at sea level.
my gauge might be off by 1/2 of a "mark" though
so 22.5-23.5, that seems ok, yes?
I did a compression test and i get 180-190 psi across the board.
my gauge might be off by 1/2 of a "mark" though
so 22.5-23.5, that seems ok, yes?
I did a compression test and i get 180-190 psi across the board.