BOV Location....

00blacky · 03-13-2013, 01:03 PM

Okay. I've searched and searched and can't get a straight answer. What is the best placement for the blow of valve on a turbo w/blow through? I'm building a kit for my buddies car and getting ready to put the bov on tonight and just want to make sure I get it in the right spot. It has an air to water in the pass side fender well. Any input help would be appreciated.

71 Cam · 03-13-2013, 01:53 PM

I think as close to the TB is best, but I have seen them everywhere from front mount intercoolers to piping inside passenger compartment. I have mine in the intake pipe about a foot from the throttle body.

00blacky · 03-13-2013, 02:34 PM

^That's where I'm stuck at. I've heard before maf after intercooler, before intercooler and then as close as you can to throttle body. Lol Guess I just need to decide before or after intercooler.

phillip_ 347 · 03-13-2013, 02:45 PM

If its blow through maf then you want the blow off valve before it.

00blacky · 03-13-2013, 02:57 PM

Yes it is blow through. So it doesn't matter if it's before or after intercooler just before the maf??

71 Cam · 03-13-2013, 03:30 PM

If running a MAF sensor you will need a recirculating BOV ,but I am not sure if you want the BOV before or after the MAF.

rdub79 · 03-13-2013, 05:51 PM

Quote:

Originally Posted by 71 Cam

If running a MAF sensor you will need a recirculating BOV ,but I am not sure if you want the BOV before or after the MAF.

It only needs to be a recirculating type IF the BOV is placed between the MAF and the TB. If it vents to atmosphere, then it needs to be placed before the MAF meter.

Zacharyx · 03-13-2013, 06:01 PM

Mine is on the inlet side of the IC, doesn't seem to have any issues there. My MAF is 18" or so past the IC

Stage Xtreme · 03-13-2013, 06:37 PM

Before the MAF on the cold side pipe. Done.

boostedbowtie · 03-13-2013, 10:41 PM

Mine is pretty close to the turbo .

onebad98z · 03-13-2013, 11:53 PM

i just talked to the guys at forced inductions on this topic, i was told the blowoff really needs to be between the compressor and the intercooler, due to the fact that any pressure drop or back pressure seen by the intercooler will be retained for a short bit in the turbo if the blowoff valve is post intercooler, and could possibly lead to thrust bearing issues later on..

03-13-2013, 01:03 PM	#1
00blacky Junior Member Spooled up Join Date: Nov 2011 Location: The No Air State,CO Posts: 144	BOV Location.... Okay. I've searched and searched and can't get a straight answer. What is the best placement for the blow of valve on a turbo w/blow through? I'm building a kit for my buddies car and getting ready to put the bov on tonight and just want to make sure I get it in the right spot. It has an air to water in the pass side fender well. Any input help would be appreciated. __________________ -Jeff 14 5.0 F150 FX4

03-13-2013, 01:53 PM	#2
71 Cam Member Pullin gears Join Date: May 2009 Location: Pittsburgh, Pa. Posts: 793	Re: BOV Location.... I think as close to the TB is best, but I have seen them everywhere from front mount intercoolers to piping inside passenger compartment. I have mine in the intake pipe about a foot from the throttle body. __________________ 71 Camaro, Andy Jensen 400ci SBC with Precision 67/66's , Th 400, 3.55 gear. Best: [email protected] 161. 3500lbs.

03-13-2013, 02:34 PM	#3
00blacky Junior Member Spooled up Join Date: Nov 2011 Location: The No Air State,CO Posts: 144	Re: BOV Location.... ^That's where I'm stuck at. I've heard before maf after intercooler, before intercooler and then as close as you can to throttle body. Lol Guess I just need to decide before or after intercooler. __________________ -Jeff 14 5.0 F150 FX4

03-13-2013, 02:45 PM	#4
phillip_ 347 Junior Member Burnout box Join Date: Mar 2010 Posts: 30	Re: BOV Location.... If its blow through maf then you want the blow off valve before it.

03-13-2013, 02:57 PM	#5
00blacky Junior Member Spooled up Join Date: Nov 2011 Location: The No Air State,CO Posts: 144	Re: BOV Location.... Yes it is blow through. So it doesn't matter if it's before or after intercooler just before the maf?? __________________ -Jeff 14 5.0 F150 FX4

03-13-2013, 03:30 PM	#6
71 Cam Member Pullin gears Join Date: May 2009 Location: Pittsburgh, Pa. Posts: 793	Re: BOV Location.... If running a MAF sensor you will need a recirculating BOV ,but I am not sure if you want the BOV before or after the MAF. __________________ 71 Camaro, Andy Jensen 400ci SBC with Precision 67/66's , Th 400, 3.55 gear. Best: [email protected] 161. 3500lbs.

03-13-2013, 06:01 PM	#8
Zacharyx Member Pullin gears Join Date: Aug 2010 Posts: 704	Re: BOV Location.... Mine is on the inlet side of the IC, doesn't seem to have any issues there. My MAF is 18" or so past the IC

03-13-2013, 06:37 PM	#9
Stage Xtreme Junior Member Launchin Join Date: Oct 2012 Location: USA Posts: 359	Re: BOV Location.... Before the MAF on the cold side pipe. Done.

03-13-2013, 10:41 PM	#10
boostedbowtie Senior Member Smoked Another SBC Join Date: Dec 2009 Location: Florida Posts: 22,833	Re: BOV Location.... Mine is pretty close to the turbo .

03-13-2013, 11:53 PM	#11
onebad98z Junior Member Spooled up Join Date: Sep 2005 Location: Flint,mi Posts: 138	Re: BOV Location.... i just talked to the guys at forced inductions on this topic, i was told the blowoff really needs to be between the compressor and the intercooler, due to the fact that any pressure drop or back pressure seen by the intercooler will be retained for a short bit in the turbo if the blowoff valve is post intercooler, and could possibly lead to thrust bearing issues later on..

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