its in inHg
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[quote name='BoneT2&Harmony' date='Apr 17 2005, 01:51 PM']turn off your anti-lag. maybe that's the problem.
[snapback]701055[/snapback] [/quote] didn't know i had the ability to turn it on [quote name='FikseRxSeven' date='Apr 17 2005, 01:53 PM']did you get your motor ported when you had it rebuilt? and how long ago was yoru rebuild? [snapback]701056[/snapback] [/quote] 10k miles ago, it was polished not ported. but ever since i got the car at 3k miles on rebuild it has been at that value [quote name='Dramon_Killer' date='Apr 17 2005, 02:48 PM']its in inHg [snapback]701081[/snapback] [/quote] your gauge? mine is in mmHg here is a pic of it which shows the maximum vacuum of 736 mmHg, which is about 14.5 psi if converted 760 mmHg = 760 torr = 1 atm = 14.7 psi |
[quote name='SidewaysFC' date='Apr 17 2005, 06:02 PM']didn't know i had the ability to turn it on
10k miles ago, it was polished not ported. but ever since i got the car at 3k miles on rebuild it has been at that value your gauge? mine is in mmHg here is a pic of it which shows the maximum vacuum of 736 mmHg, which is about 14.5 psi if converted 760 mmHg = 760 torr = 1 atm = 14.7 psi [snapback]701112[/snapback] [/quote] = 101.3 bar |
[quote name='Dramon_Killer' date='Apr 17 2005, 08:12 PM']= 101.3 bar
[snapback]701157[/snapback] [/quote] WRONG. 14.7 psi = 1.01325 bar = 1 atm = 101.325 kPA = 760 mmHg = 760 torr 1 bar = 100 kPa <-- don't get this wrong! or else space ships will implode and nuclear power stations will meltdown. Thank god engineers design with margin of safeties (aka fudge factors) you are off by a factor of 100, I don't even think Mazda designs their cars with a safey factor of 100. NASA doesn't forsure. |
oops, i get about 350 mmHg at 750 rpms and 375 mmHg at idle(900 rpms). seems to be around what those who contributed are at. thanks guys.
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http://www.anver.com/document/company/Refe...des/vacuum.html
350mmHg = 6.8psig 375mmHg = 7.3psig You got boost leaks or something? -Ted |
[quote name='drunkin_idiot' date='Apr 16 2005, 06:33 PM']15-20mmhg is ideal, but 20mmhg is best on any gauge.
[snapback]700818[/snapback] [/quote] You're thinking inches of mercury. 15-20 in/hg is good vacuum numbers for idle. 15-20 millimeters of mercury is only about 0.5 inches of mercury... your engine would hardly be running with those vacuum numbers at idle. 15-20 in/hg is 380-500 mm/hg. On decel, its not uncommon to see 24-26 in/hg. ~29 in/hg is the lowest vacuum possible. |
[quote name='RETed' date='Apr 23 2005, 04:02 AM']http://www.anver.com/document/company/Refe...des/vacuum.html
350mmHg = 6.8psig 375mmHg = 7.3psig You got boost leaks or something? -Ted [snapback]703632[/snapback] [/quote] Not that I am aware of. The car boosts fine and idles fine, except for sticky throttle. A lot of my vacuum/boost sources are T'd off, but I don't think that would have an effect. To be honest, everyone keeps mentioning it is low, but I have taken it in to several mechanics for other problems and they have never mentioned my vacuum to be lower than normal. But it does worry me still. |
Oh!
Get rid of those ()^)#(%$)@# T's! Try and plumb the boost gauge hose straight into the fitting with no T - the vacuum should read "higher". -Ted |
Ok
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