Installing BOV - Page 3

supra_rulz · 06-21-2010, 10:05 PM

ok, well i got it today and installed it right away.
http://www.facebook.com/photo.php?pi...00000216988284 (i know its facebook but w/e)
anyways so i actually pulled it off and installed it. it works great..........except for the one problem i knew was comming. the stalling. lol it kinda sucked because i was testing it and my car stalled right next to this really hot chick, i waited till she pulled away to start my car lol

so my question now is, for the resurculation thing, do i just need to get a hose and connect the outlet of the BOV to the acordion bend where the old one went?

supra_rulz · 06-21-2010, 10:46 PM

another question. lol

now that i have a BOV, shouldnt the boost gauge read 0 when i'm not on the gas?

EDIT:
ANOTHER question. will getting a MAF instead of AFM help at all? and will rasing the idle rpm be a shor-term fix?

btwilson86 · 06-22-2010, 03:43 AM

Quote:

Originally Posted by supra_rulz

now that i have a BOV, shouldnt the boost gauge read 0 when i'm not on the gas?

Nope. Your turbo isn't spinning fast enough at idle to counteract the vacuum that your engine creates, so you should be reading a few in/Hg (or -psi depending on your boost gauge) at idle.

supra_rulz · 06-22-2010, 03:56 AM

Quote:

Originally Posted by btwilson86

Nope. Your turbo isn't spinning fast enough at idle to counteract the vacuum that your engine creates, so you should be reading a few in/Hg (or -psi depending on your boost gauge) at idle.

see, the thing is...its still -20 psi. same as before the install....is that normal or even ok?

btwilson86 · 06-22-2010, 03:59 AM

That I'm not sure of.... What vacuum line did you tap into for the gauge source? Or are you running the stock boost gauge?

supra_rulz · 06-22-2010, 04:11 AM

Quote:

Originally Posted by btwilson86

That I'm not sure of.... What vacuum line did you tap into for the gauge source? Or are you running the stock boost gauge?

i have no idea where its tapped into. i got it as is. and no its not a stock guage. how much would that matter?

btwilson86 · 06-22-2010, 06:04 AM

Well, different vacuum lines may see different amounts of boost pressure as well as different amounts of vacuum. You may be seeing excessive amounts of vacuum pressure because your line for your boost gauge may not be installed on an ideal vacuum line.

supra_rulz · 06-23-2010, 05:56 PM

Quote:

Originally Posted by btwilson86

Well, different vacuum lines may see different amounts of boost pressure as well as different amounts of vacuum. You may be seeing excessive amounts of vacuum pressure because your line for your boost gauge may not be installed on an ideal vacuum line.

that makes sense. i donno, the guys i baught it from were.....not exactly taking care of the car. more like just running it for what its worth.....i actually dont know where they have it. where would the "best" or ideal place be to put the vacuum?

cre · 06-24-2010, 03:40 AM

Vacuum lines also have a response time, depending on the source (and I don't just mean before or after the throttle body). For example providing the wastegate actuator with a signal after the intercooler will net you more power due to the turbo having to reach a higher pressure to compensate losses imposed by the IC before it'll reach the actuator spring's pressure. The downside is that due to the significant lag you'll see surges in boost and air temp.... not so good.

supra_rulz · 06-25-2010, 04:18 AM

ok. i will check where the vacuum line is hooked up and go from there

06-21-2010, 10:46 PM	#22
supra_rulz 3" Exhaust Join Date: Mar 2010 Location: Seattle, WA Posts: 81	another question. lol now that i have a BOV, shouldnt the boost gauge read 0 when i'm not on the gas? EDIT: ANOTHER question. will getting a MAF instead of AFM help at all? and will rasing the idle rpm be a shor-term fix? Last edited by supra_rulz; 06-22-2010 at 12:47 AM.

06-22-2010, 03:59 AM	#25
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	That I'm not sure of.... What vacuum line did you tap into for the gauge source? Or are you running the stock boost gauge? __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

06-22-2010, 06:04 AM	#27
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Well, different vacuum lines may see different amounts of boost pressure as well as different amounts of vacuum. You may be seeing excessive amounts of vacuum pressure because your line for your boost gauge may not be installed on an ideal vacuum line. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

06-24-2010, 03:40 AM	#29
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Vacuum lines also have a response time, depending on the source (and I don't just mean before or after the throttle body). For example providing the wastegate actuator with a signal after the intercooler will net you more power due to the turbo having to reach a higher pressure to compensate losses imposed by the IC before it'll reach the actuator spring's pressure. The downside is that due to the significant lag you'll see surges in boost and air temp.... not so good. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
installing thermostat	sd88supra	MKIII Supra	8	06-18-2010 02:23 AM
installing new intercooler	1_BAD_MK3	MKIII Supra	1	01-31-2010 12:23 PM
Installing new CD Player	Cyto	Car Audio and Alarms	2	12-25-2009 04:50 AM
question about installing a JDM	mad_dicer	MKIII Supra	7	11-12-2006 03:21 PM
Installing ALARM!	jaysun	MKIII Supra	4	06-21-2006 04:52 AM

06-21-2010, 10:05 PM	#21
supra_rulz 3" Exhaust Join Date: Mar 2010 Location: Seattle, WA Posts: 81	ok, well i got it today and installed it right away. http://www.facebook.com/photo.php?pi...00000216988284 (i know its facebook but w/e) anyways so i actually pulled it off and installed it. it works great..........except for the one problem i knew was comming. the stalling. lol it kinda sucked because i was testing it and my car stalled right next to this really hot chick, i waited till she pulled away to start my car lol so my question now is, for the resurculation thing, do i just need to get a hose and connect the outlet of the BOV to the acordion bend where the old one went?

06-25-2010, 04:18 AM	#30
supra_rulz 3" Exhaust Join Date: Mar 2010 Location: Seattle, WA Posts: 81	ok. i will check where the vacuum line is hooked up and go from there