If you have boost gauge, what are you reading for vaccume, at idle? Around 20-22 ???

gixxer · Sun, Nov-09-2008, 01:16:32 AM

At idle, and at foot off the pedal, the boost is reading around 20-22.

The AEM Tru-Boost boost gauge ranges as follows,

30-to-0 <== on this bottom range is where at idle, the vacuum is at 20-22
0-to-50 <== on this upper range is where i hit around 9 psi with AA kit

What are you reading as vacuum at idle?

**RaceMX-M3** · Sun, Nov-09-2008, 02:26:24 AM

Mine is 18 - 20

Jeffxxx · Sun, Nov-09-2008, 02:36:43 AM

I've got 18-20.

Richardsperry · Sun, Nov-09-2008, 11:22:39 AM

Depends on the engine...

Mine is 23-24" using a milspec pressure sensor.

Saintly · Mon, Nov-10-2008, 06:54:43 AM

I get 17vac

zero4 · Mon, Nov-10-2008, 05:51:59 PM

-18 to -20

sniperM · Mon, Nov-10-2008, 11:23:10 PM

18~20

BrianSpilner · Tue, Nov-11-2008, 07:49:23 PM

18~20

NetworkGeek · Tue, Dec-16-2008, 05:48:04 AM

Is this a good website to understand your vacuum gauge and potential problems?

http://www.therangerstation.com/Maga...acuumLeaks.htm

Looks to be accurate with what everyone is saying above...

shadowless · Thu, Dec-18-2008, 03:56:45 PM

at idle without AC/heat on, i get 20-22. at times, my idle goes back and forth in that range. iirc, with AC/heat on, i get 18 or so.

Sun, Nov-09-2008, 01:16:32 AM	#1
gixxer Registered User Join Date: Sep 2006 Posts: 1,686 Reputation: 0	If you have boost gauge, what are you reading for vaccume, at idle? Around 20-22 ??? At idle, and at foot off the pedal, the boost is reading around 20-22. The AEM Tru-Boost boost gauge ranges as follows, 30-to-0 <== on this bottom range is where at idle, the vacuum is at 20-22 0-to-50 <== on this upper range is where i hit around 9 psi with AA kit What are you reading as vacuum at idle? __________________ need2buy: LTW flywheel + clutch ; wish: HPF ; Mod Journal

Sun, Nov-09-2008, 02:26:24 AM	#2
RaceMX-M3 Scott@Radar-Mirror.com Join Date: Jan 2005 Posts: 2,899 Reputation: 0 Location: Dallas	Mine is 18 - 20 __________________ CLICK HERE FOR BMW REAR VIEW MIRROR REPAIR www.Radar-Mirror.com Scott@Radar-Mirror.com

Sun, Nov-09-2008, 02:36:43 AM	#3
Jeffxxx LSB FTW Join Date: Feb 2008 Posts: 658 Reputation: 11 Location: washington	I've got 18-20. __________________ Featured in the August issue of Performance BMW

Sun, Nov-09-2008, 11:22:39 AM	#4
Richardsperry 95 SC M3 Join Date: Aug 2005 Age: 56 Posts: 3,531 Reputation: 0 Location: Eldersburg, MD	Depends on the engine... Mine is 23-24" using a milspec pressure sensor. __________________ No matter where you go, there you are!

Mon, Nov-10-2008, 06:54:43 AM	#5
Saintly Registered User Join Date: Feb 2007 Posts: 367 Reputation: 0 Location: Brisbane, Australia	I get 17vac __________________ 508rwhp Dynodynamics AA charged 9psi race gas(no nos) 11.618@122.65mph 521rwhp Dynodynamics AA charged 9psi race gas(125shot) 11.412@126.09mph(Best trap 129.72mph) 611rwhp Dynodynamics AA charged 9psi race gas(150shot) 11.7@129.49mph 631Rwhp highest HP to date. Now: 528rwhp Dynodynamics 13psi Pump Fuel AA Charged 552rwhp Dynodynamics 13psi Race Fuel AA Charged

Mon, Nov-10-2008, 05:51:59 PM	#6
zero4 Registered User Join Date: Nov 2002 Posts: 543 Reputation: 0	-18 to -20 __________________ VF Stage 2, BBS RS-GT, TCK DA, SS stepped headers and race cats, Amuse exhaust, Eibach sways, Brembo 4 pot, 3.91 dual clutch diff, Autosolutions SSK

Mon, Nov-10-2008, 11:23:10 PM	#7
sniperM 2 miles in front of u.. Join Date: Aug 2004 Posts: 1,662 Reputation: 0 Location: duluth	18~20 __________________ 05' carbon black M3 S2

Tue, Nov-11-2008, 07:49:23 PM	#8
BrianSpilner Sounds like a serial killer; is that what you are? Join Date: Oct 2005 Age: 24 Posts: 7,499 Reputation: 0 Location: Chicago	18~20 __________________ Follow Me: Facebook \| Youtube \| Zima Motorsports CLICK HERE to check out my Custom Exhaust Build 2004 BMW E46 ///M3 Active Autowerke Supercharged Stage '5' Custom

Tue, Dec-16-2008, 05:48:04 AM	#9
NetworkGeek Kilaho33 Join Date: Oct 2005 Posts: 296 Reputation: 0	Is this a good website to understand your vacuum gauge and potential problems? http://www.therangerstation.com/Maga...acuumLeaks.htm Looks to be accurate with what everyone is saying above...

Thu, Dec-18-2008, 03:56:45 PM	#10
shadowless what goes around comes around...pay it forward Join Date: Mar 2006 Posts: 6,516 Reputation: 0 Location: birthplace of elvis	at idle without AC/heat on, i get 20-22. at times, my idle goes back and forth in that range. iirc, with AC/heat on, i get 18 or so. __________________ No, car is not done yet.... HATERS GONNA HATE 452 whp/323 wtq with 93 oct on mustang dyno (old maf+ tune) project progress consolidated for easier viewing (click on pic above for m3f thread) for sale (all used unless noted w/ ): FORGELINE 18x8.5F/18x10R WC3s in all satin black \| leather master products, prima wheel armour, sonax full effect wheel cleaner \| menzerna power lock sealant, super intensive polish, super finish \| oem fan clutch, and oem maf \| sunroof, projectors, headliner w/ sunroof cutout \| full set of HK speakers going on sale soon (used unless noted w/ *): icelink plus \| previous gen bsw d110 \| oem oil cooler \| oem clutch fan \| AA sports fan clutch \| BHS headers LOWBALLERS will be IGNORED. don't bother posting in my fs threads or pm'ing me. let's not waste your time or mine. thanks.

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