What BOV can be redirected to intake?? - Page 2

Green7mgte · 08-04-2010, 04:28 AM

wtf... hmm must of hit edit instead of quote.

my bad.

cre · 08-04-2010, 04:34 AM

Quote:

Originally Posted by Green7mgte

wtf... hmm must of hit edit instead of quote.

my bad.

n/p.... I have madddd powah!!!

MA70-3.0GT · 08-04-2010, 12:16 PM

Now this thread kinda hits on a subject I've been pondering during my enforced downtime, if I were to plumb in an extra BOV (Currently fitted is a Bailey twin piston valve, was thinking one more of the same) is the effectively doubled BOV venting capacity going to do anything other than produce a shorter, sharper "PSHH" when coming off the throttle?

(Bearing in mind I have an auto so am not worried about reducing spoolup/lag times post gearshift, just after venting quicker primarily to scare peds. more, but also on the theory that quicker venting of excess boost on closing the throttle might be better for the turbo bearings...)

cre · 08-04-2010, 03:08 PM

you're not going to see a major benefit unless you're running a massive amount of boost.

MA70-3.0GT · 08-04-2010, 03:37 PM

That's kinda how I figured it would be on the benefits to the turbo side of things, and it is only running about 10psi but it does seem to take a couple of seconds for the boost to bleed off when the single BOV opens (maybe I'm exaggerating things in my mind, not driven the damn thing for months & it's sending me

!) and really the main thing I'm after is to change the blowoff sound from a PSHHHHH to more like a PSH!!.

Maybe I'll just plumb in the original recirc. valve (but venting to atm.) alongside the Bailey BOV & see what sort of effect that has before spending money I don't have yet on something I already have one of...

Travis89Turbo · 08-04-2010, 04:08 PM

Your ECU looks for that air between shifts it will almost certainly bog down or backfire when u lift off the throttle when i had mine to the atm. just for troubleshooting it ran like a dogs a$$. definatly wouldnt reccommend that!! unless you run some kind of AFC to change the parameters during shift point...even then it takes alot to get right with out aftermarket EMS or MAFT PRO.. or in other words.. $$$$$$$$$$

MA70-3.0GT · 08-04-2010, 04:12 PM

Already running single BOV and it's fine, thanks though. Mine's auto but doubt that makes a difference...

Green7mgte · 08-04-2010, 07:09 PM

Quote:

Originally Posted by Travis89Turbo

...even then it takes alot to get right with out aftermarket EMS or MAFT PRO.. or in other words.. $$$$$$$$$$

yea you would need an safc + a wide band sensor .. thats at least 400..

cre · 08-05-2010, 03:15 AM

Quote:

Originally Posted by MA70-3.0GT

Already running single BOV and it's fine, thanks though. Mine's auto but doubt that makes a difference...

Few people experience no issue... some just run rich but most run rich enough to at least backfire once in a while. Running both BPV and a BOV is not unheard of on vehicles with air flow meters, it cuts the negative effects in half and improves tip in throttle response over running with just a BOV... somewhat.

Green7mgte · 08-05-2010, 03:18 AM

if i were to change to a bov instead of a BPV i would probably run one of each in sequential sequence. altho of course i have an safc so i can modify my decal air..

08-04-2010, 04:28 AM	#11
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	wtf... hmm must of hit edit instead of quote. my bad. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

08-04-2010, 12:16 PM	#13
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	Now this thread kinda hits on a subject I've been pondering during my enforced downtime, if I were to plumb in an extra BOV (Currently fitted is a Bailey twin piston valve, was thinking one more of the same) is the effectively doubled BOV venting capacity going to do anything other than produce a shorter, sharper "PSHH" when coming off the throttle? (Bearing in mind I have an auto so am not worried about reducing spoolup/lag times post gearshift, just after venting quicker primarily to scare peds. more, but also on the theory that quicker venting of excess boost on closing the throttle might be better for the turbo bearings...) __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!

08-04-2010, 03:08 PM	#14
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	you're not going to see a major benefit unless you're running a massive amount of boost. __________________ 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 --->

08-04-2010, 03:37 PM	#15
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	That's kinda how I figured it would be on the benefits to the turbo side of things, and it is only running about 10psi but it does seem to take a couple of seconds for the boost to bleed off when the single BOV opens (maybe I'm exaggerating things in my mind, not driven the damn thing for months & it's sending me !) and really the main thing I'm after is to change the blowoff sound from a PSHHHHH to more like a PSH!!. Maybe I'll just plumb in the original recirc. valve (but venting to atm.) alongside the Bailey BOV & see what sort of effect that has before spending money I don't have yet on something I already have one of... __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!

08-04-2010, 04:12 PM	#17
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	Already running single BOV and it's fine, thanks though. Mine's auto but doubt that makes a difference... __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!

08-04-2010, 04:08 PM	#16
Travis89Turbo 12psi boost Join Date: Jul 2010 Location: Utah Posts: 332	Your ECU looks for that air between shifts it will almost certainly bog down or backfire when u lift off the throttle when i had mine to the atm. just for troubleshooting it ran like a dogs a$$. definatly wouldnt reccommend that!! unless you run some kind of AFC to change the parameters during shift point...even then it takes alot to get right with out aftermarket EMS or MAFT PRO.. or in other words.. $$$$$$$$$$

08-05-2010, 03:18 AM	#20
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	if i were to change to a bov instead of a BPV i would probably run one of each in sequential sequence. altho of course i have an safc so i can modify my decal air.. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

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