mrmackie Donating Members 67 Member For: 17y 7m 5d Gender: Male Location: Perth - CBD Posted 28/10/10 09:59 AM Share Posted 28/10/10 09:59 AM Not sure if this has been asked a 1000 times before, but,......There are alot of XR6 systems with the BOV mounted on the cold side and anywhere from being near the throttle body to close to the cooler.I read an article that recommended mounting the blow off valve on the hot side (between turbo and the hot side of cooler) or mounted on the hot side of the cooler. The reason for this is listed in a clipping of the article below:"The vast majority of people will tell you that you are supposed to place your blow off valve within a couple feet of your throttle body. I am here to tell you that this is not the best location for your blow off valve.The best location for your blow off valve is going to be in between your turbo and intercooler, on the hot side.Think about it. If you put the blow off valve on the cold side (after the intercooler), you are pushing hot air through your intercooler for nothing. This increases the speed at which your intercooler and motor become heat soaked.By putting the blow off valve before, or even on the intercooler itself - you allow all of the hot compressed air to escape to atmosphere prior to passing through the intercooler. A blow off valve does the same thing no matter where you place it on the charge piping. Knowing this - it's only logical to put it in a place where it relieves hot air rather than cold air."SO,.....Any thoughts from people WITH experience on this would be appreciated Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/ Share on other sites More sharing options...
our06t Mmmmm......BOOST Member 3,135 Member For: 17y 11m 26d Gender: Male Location: central coast Posted 28/10/10 09:43 PM Share Posted 28/10/10 09:43 PM I think that theory is a bit of a stretch common theory is the closer to the throttle body the better ,the throttle is where the back pressure starts to build after it closes in theory the closer to throttle the quicker it will dump excess boost Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1051235 Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 15y 3m 5d Gender: Male Location: Christchurch, New Zealand Posted 29/10/10 05:05 AM Share Posted 29/10/10 05:05 AM When you think about it it shouldnt matter where it is as the pressure is in the system the whole time. As so as the BOV opens with the throttle shut it is going to take that path out. It shouldnt back track through the cooler it should just dump the hot air which is coming from the turbo.I am wanting to do this to keep piping short when I change my intake setup, the only worry I have is what temp can the BOV handle as it will be very hot and also can I muffle it as I dont want the noise, maybe plumb to the exhaust. Still a work in progress. Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1051347 Share on other sites More sharing options...
mrmackie Donating Members 67 Member For: 17y 7m 5d Gender: Male Location: Perth - CBD Posted 29/10/10 05:37 AM Author Share Posted 29/10/10 05:37 AM (edited) Thanks guys. It does make for an interesting topic of conversation. Doesnt the BOV dump excess pressure back into the intake pipe of the turbo anyway so you wouldnt have to vent it to the exhaust to keep it legal?Regarding the intake temp after it is pressurised by the turbo, without having researched this id guess its only around 60deg before the cooler. Im sure the heat under the hood would be way more than that, so the BOV should be able to handle 60deg temps going through it Edited 29/10/10 05:41 AM by mrmackie Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1051358 Share on other sites More sharing options...
mrmackie Donating Members 67 Member For: 17y 7m 5d Gender: Male Location: Perth - CBD Posted 29/10/10 06:14 AM Author Share Posted 29/10/10 06:14 AM OK, I did some surfing on the intraweb and found a formula for calculating an approx temp of compressed air after the turbo.Running boost at around 14.5psi, and on a day when the outside air temp is 30deg, the compressed air temp out of the turbo but before the cooler will be around 95deg, an increase of 65deg from being compressed.This should still be ok for the BOV to handle Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1051363 Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 15y 3m 5d Gender: Male Location: Christchurch, New Zealand Posted 30/10/10 01:03 AM Share Posted 30/10/10 01:03 AM Yea it should handle that temp, obviously a metal parts one would be the better option. If you are just dumping the air not recirculating then dumping the hot would be better than cold. If sending it back to the intake then youd definitely be better doing the cold side. Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1051535 Share on other sites More sharing options...
LukesF6 Donating Members 28 Member For: 16y 2m 14d Gender: Male Location: Brisbane Posted 03/01/11 11:10 AM Share Posted 03/01/11 11:10 AM Nah... Mate don't listen to that crap... The moment your throttle snaps shut the air has nowhere to go but back the other direction... By mounting a bov next to the throttle body air is still flowing towards the engine as it vents out... Doesn't matter if hot air passes through the intercooler coz that's what it's meant to do... Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1068765 Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 15y 3m 5d Gender: Male Location: Christchurch, New Zealand Posted 03/01/11 12:55 PM Share Posted 03/01/11 12:55 PM Well the BOV on the vehicle as standard isnt right next to the throttle body so you are still going to have air standing still between the bov and tb. But if you read what was being said which was when recirculating definitely cold side but when dumping the air why not the hot side. And the air will always be flowing towards the engine unless you have no bov at all. Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1068809 Share on other sites More sharing options...
FOONIN Donating Members 678 Member For: 15y 11m 24d Gender: Male Location: CHCH NZ Posted 04/01/11 07:16 AM Share Posted 04/01/11 07:16 AM Do I really need a BOV??? oooo I love starting this big debate Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1068976 Share on other sites More sharing options...
LukesF6 Donating Members 28 Member For: 16y 2m 14d Gender: Male Location: Brisbane Posted 04/01/11 10:59 AM Share Posted 04/01/11 10:59 AM On 04/01/2011 at 7:16 AM, osonvs said: Do I really need a BOV??? oooo I love starting this big debate Depends on how much u love that dose sound I guess... I think it sounds awesome but I love my turbo more so BOV it is... Link to comment https://www.fordxr6turbo.com/forum/topic/71335-best-location-for-bov/#findComment-1069080 Share on other sites More sharing options...
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