 Venting the Stock BPV on an ST205 GT4, Bad or is it ok? |
 Sep 19, 2011 - 9:42 AM
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Enthusiast  Joined Nov 27, '09 From Canada Currently Offline Reputation: 4 (100%)  |
Ive been reading all night about blow off valves and bypass valves. All i seem to read about is bad things (besides the sounds it makes) about blow off valves. Things like you run rich, lose power and crap like that. I wanted to know if this is the same way for 3SGTE ( i would assume so) Also does running rich every time you shift gear waste a noticeable amount of gas?
Also say i don't get a BOV. The BPV is designed to recirc the air back to the intake box. If i get an Apex'i intake filter to replace my box, Is there any way i can recirc the air back to the intake system? (btw I'm just getting the filter. The rubber intake piping will stay. I noticed the BPV is bolted onto the box so i see no way of getting it recirc'd to the intake system unless the piping was metal and a flange was welded onto it for the BPV to bolt onto. This post has been edited by Goonter: Sep 24, 2011 - 6:08 PM |
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Sep 19, 2011 - 11:42 PM
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 Enthusiast Joined Aug 1, '11 From San Diego, CA Currently Offline Reputation: 0 (0%) |
What has been said is correct, but I like to add some more.
The reason that the 3rd gen is ok using the BOV is because the map system measures the air as it enters the throttle/intake manifold. In other words the BOV is located before the sensor. The second gen measures the air at the intake which the BOV is located afterwards. The best solution for the second gen or any system using a AFM is using a aftermarket system like the old HKS VPC. For example the HKS VPC system installs the sensor right before the throttle body and after the BOV. In any case the BOV is still recommended when using a 1st or 2nd gen 3SGTE due to a lack of a BPV. --------------------  1990 Celica Turbo All-Trac, 1977 Celica GT Liftback, 1999 Celica GT Convertible, 2004 Lexus IS300 5-Speed |
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Feb 20, 2012 - 10:18 AM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
QUOTE (jlspec @ Sep 19, 2011 - 8:42 PM)  What has been said is correct, but I like to add some more. The reason that the 3rd gen is ok using the BOV is because the map system measures the air as it enters the throttle/intake manifold. In other words the BOV is located before the sensor. The second gen measures the air at the intake which the BOV is located afterwards. The best solution for the second gen or any system using a AFM is using a aftermarket system like the old HKS VPC. For example the HKS VPC system installs the sensor right before the throttle body and after the BOV. In any case the BOV is still recommended when using a 1st or 2nd gen 3SGTE due to a lack of a BPV. this is all wrong! MAP means pressure, not air! a MAP systems is totally different from a MAF system. -------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
Posts in this topic
Goonter Venting the Stock BPV on an ST205 GT4 Sep 19, 2011 - 9:42 AM
bsamps4 I wish I had a definitive answer for you, but let ... Sep 19, 2011 - 10:11 AM Neon90424 2nd gen BOV vent to atmosphere = bad metered air i... Sep 19, 2011 - 10:41 AM Sunny Hi,
the advantage of a BOV is very simple, it pro... Sep 19, 2011 - 1:32 PM
Unicorn QUOTE (Sunny @ Sep 19, 2011 - 2:32 P... Sep 19, 2011 - 3:20 PM Smaay Unicorn is 100% correct! Sep 19, 2011 - 4:19 PM Goonter Awesome detailed explanation unicorn. Thanks alot ... Sep 19, 2011 - 5:08 PM Unicorn No problem at all, just glad I can help a little
... Sep 19, 2011 - 6:49 PM Goonter Thanks for the informative replies guys. I appreci... Sep 20, 2011 - 2:34 PM Goonter Alright i know i got my answer for the topic and a... Sep 24, 2011 - 6:07 PM UndaGrwnD im sorry that i bring up a old topic.
but i wante... Feb 20, 2012 - 9:56 AM evo_lucian QUOTE (UndaGrwnD @ Feb 20, 2012 - 10... Feb 21, 2012 - 7:04 PM Stambo ^^ i agree. But a speed density system measures va... Feb 20, 2012 - 9:16 PM Smaay ^^^ yes because thats pressure, not airflow.
when... Feb 21, 2012 - 10:35 AM |
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