BOV explained!

joel w · 10-13-2005, 12:07 AM

Hmmm see... that is different than my set up... air goes through filter, then afm then the turbo and out to intercooler and back up to BOV and then into the throttle body. so on your diagram , #5 goes between #1 and #2 but i guess i could move the afm anywhere huh? but still the hks ssqv bov that i run has no way to attatch a large tube back to the intake? so no point for me i guess anyways. i like the noise of the bov and if it runs rich. then thats better then lean.

Is a AFM(air flow meter) the same as a MAF(mass air flow) sensor?? Then there is the MAP sensor like the newer supras use and dont use a AFM or MAF??

GreenChevelleSS · 10-13-2005, 02:54 AM

We did a supercharger on a 89 Camaro MAF and first off we had the MAf before the supercharger and the thing never ran right and always idled funny. Well we decided to try the other way, mounting the MAF after the supercharger and we have never had a problem with it and the thing idles great and all. Also one thing we noticed was the closer the Maf is to the intake the better since there can be tiny air leaks at joints that can also throw it off. This is a non intercooled centrifical supercharger.

joel w · 10-13-2005, 03:33 AM

ya my afm is at the beginning before turbo but it idles soo smooth and runs awsome. all my ic piping is hand made by me and pressure tested to 50 psi and no leaks and i use hi temp silicon hose and all t-bolt clamps so no leaks here at all.

joel w · 10-13-2005, 04:37 AM

ok,to clerify. for my part..i did some reasearch and...

an AFM(air FUEL meter) has the flapper door inside with the gears, and i have the MAF(mass air flow )meter with the wire resistor that will ONLY work before the turbo? ok, so, if this is true?, then the stock BOV vented after the MAF sensor into the accorian hose before the turbo from the factory?..correct?

suprra_girl · 10-14-2005, 01:10 AM

yep... it vents back to the intake

most ppl just tighten up the ssq so that it doesn't cause excessive richness on shifts....

our afm is a karman vortex afm

Littlestan · 10-14-2005, 08:37 PM

I'va also found that some people buy an aftermarket BOV, then hook it up

with a "recirculation" kit. This usually only involves one hose and some clamps,

effectively making the BOV operate like a BV while still retaining some of

"whoooosh" we all love. Using a metal pipe rather than a hose makes this

effect louder as the rubber absorbs some of the sound.

Anyways, I'll post some sound bytes of my Greddy Type S hooked up

with/without recirculation kit when I get it. Might be awhile...

Cheers!,

-=Littlestan=-

SupraMan1784 · 10-14-2005, 08:41 PM

i have a recirculation kit...it doesnt really do much...just reroutes unused boost back into teh intake...relieves back pressure too...its a good thing to have

10-14-2005, 08:37 PM	#6
Littlestan Intake Join Date: Oct 2005 Location: Chilliwack, B.C. CANADA Posts: 44	I'va also found that some people buy an aftermarket BOV, then hook it up with a "recirculation" kit. This usually only involves one hose and some clamps, effectively making the BOV operate like a BV while still retaining some of "whoooosh" we all love. Using a metal pipe rather than a hose makes this effect louder as the rubber absorbs some of the sound. Anyways, I'll post some sound bytes of my Greddy Type S hooked up with/without recirculation kit when I get it. Might be awhile... Cheers!, -=Littlestan=- __________________ \|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\| \|\|\|\|\|\|\|\|\|\| Everything returns to the One. What does the One return to? \|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\| \|\|\|\|\|\|\|\|\|\|

10-14-2005, 08:41 PM	#7
SupraMan1784 SP58GT Join Date: Jun 2005 Location: Dirty Jerz Posts: 691	i have a recirculation kit...it doesnt really do much...just reroutes unused boost back into teh intake...relieves back pressure too...its a good thing to have __________________ Now: Saving for an MKIV Broken Rides: (Sold) 91 supra turbo 5speed with a 1jzgte motor 421whp 400(399) ft*lbs of torque on tap @ 15 psi "Always outnumbered, never outgunned."

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10-13-2005, 12:07 AM	#1
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	Hmmm see... that is different than my set up... air goes through filter, then afm then the turbo and out to intercooler and back up to BOV and then into the throttle body. so on your diagram , #5 goes between #1 and #2 but i guess i could move the afm anywhere huh? but still the hks ssqv bov that i run has no way to attatch a large tube back to the intake? so no point for me i guess anyways. i like the noise of the bov and if it runs rich. then thats better then lean. Is a AFM(air flow meter) the same as a MAF(mass air flow) sensor?? Then there is the MAP sensor like the newer supras use and dont use a AFM or MAF?? Last edited by joel williams; 10-13-2005 at 03:35 AM. Reason: new info

10-13-2005, 02:54 AM	#2
GreenChevelleSS 3" Exhaust Join Date: Oct 2005 Location: okiehoma USA Posts: 70	We did a supercharger on a 89 Camaro MAF and first off we had the MAf before the supercharger and the thing never ran right and always idled funny. Well we decided to try the other way, mounting the MAF after the supercharger and we have never had a problem with it and the thing idles great and all. Also one thing we noticed was the closer the Maf is to the intake the better since there can be tiny air leaks at joints that can also throw it off. This is a non intercooled centrifical supercharger. __________________ 1990 Toyota Supra Turbo 7M-GTE 1970 Chevrolet Chevelle SS 396 1996 Chevrolet Silverado Z71 www.cardomain.com/id/3115ultima

10-13-2005, 03:33 AM	#3
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	ya my afm is at the beginning before turbo but it idles soo smooth and runs awsome. all my ic piping is hand made by me and pressure tested to 50 psi and no leaks and i use hi temp silicon hose and all t-bolt clamps so no leaks here at all.

10-13-2005, 04:37 AM	#4
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	ok,to clerify. for my part..i did some reasearch and... an AFM(air FUEL meter) has the flapper door inside with the gears, and i have the MAF(mass air flow )meter with the wire resistor that will ONLY work before the turbo? ok, so, if this is true?, then the stock BOV vented after the MAF sensor into the accorian hose before the turbo from the factory?..correct?

10-14-2005, 01:10 AM	#5
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	yep... it vents back to the intake most ppl just tighten up the ssq so that it doesn't cause excessive richness on shifts.... our afm is a karman vortex afm __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!