machine4321

i like the stealth approach when it comes to cars so im opting to recirculate the bov back in to the intake system . now i was wondering if i ran the bov charge directly in to the compressor inlet . would this help with the lag between shifting (ive felt it on a few cars but nmot saying that that is the problem ).

is ther going to be a power loss by doing the system this way .


and for the dump tube , i wanted to run it under the pan and have it join in the system on a 45 degree angle to try to get a bit of vaccum to help draw the gase in to the exaust . will that have any affect on power .


ive been searching for a few hours and found part answers but needed more info . thanks guys

machine4321

nothing ?

machine4321

UP

bubs

Recirculating the BOV won't hurt your power, but I can't see how running it directly to the compessor inlet will help with lag. The air will take the path of least resistance which will be straight out your air filter. Again, it won't hurt anything to do it this way and you won't lose any power, but I personally don't think it will give any advantage except no bov sound (which I consider a disadvantage ).

Running the dump tube back into the exhaust shouldn't hurt your power, at least not anything you'll notice.

machine4321

good stuff , thanks man . i wil try the bov open of course first to see if i like it

f22b2tdave

i reran my bov into the filter. i loved the lack of bov noise. but i still run open dump, wish i had closed that. my exhaust is too loud as is, 2 14" resonators on a full 3", but when the dump opens...man, yeah i wish i had recirculated that.

scottishdave

I ran a 2 1/2 downpipe with a 3inch open exhaust with an open dump tube when i was turbo. The exhaust and turbo whining away was so loud i couldnt hear ****. Im sure the wastegate sounded loud from the outside though.

machine4321

im just not into the open wastegate sound , i like ti to sound clean , so ill be runnign closed loop.

thanks

hunderpressure

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machine4321 &raquo;</TD></TR><TR><TD CLASS="quote">UP
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This is true, but the least path of resistance in this case would be the suction of the compressor as the pressure at that point is lower than atmospheric pressure.

BTW Suburu recommends that you leave their recirculation valve in place and do not replace it with a BOV as the compressor do not have to remake that air upon acceleration after gear changes as against if it was blown off. This gives a better throttle reponse.

machine4321

ah ha , see im not crazy , it made sence in my head , probly not enough to really worry about it but if i was gonan dump in back in why not have it shoot into the inlet.

dpetro1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hunderpressure &raquo;</TD></TR><TR><TD CLASS="quote">


BTW Suburu recommends that you leave their recirculation valve in place and do not replace it with a BOV as the compressor do not have to remake that air upon acceleration after gear changes as against if it was blown off. This gives a better throttle reponse.</TD></TR></TABLE>

i dont know much about the wrx but i think they use a MAF (mass air flow) sensor and thats why they use recirculation. with an MAF sensor, a BOV that vents to the atmosphere can cause problems because air that was already detected by the sensor gets released from the system. the ecu thinks there is more air than there actually is and that causes overly rich conditions, which might make the car feel laggy. i know for sure this is true with dsm's.

hondas use a MAP sensor so this isnt a problem. you can recirc the bov if you want to keep it sleeper but i dont think there will be any performance gains or losses.

please someone correct me if im wrong about the wrx thing.

kyden

you are correct on the MAF sensor.