BOV on the hotpipe!?

[KPNITRL]

I keep seeing all these setups with the bov on the hotpipe and no one on the coldpipe. Seeing as in stock form the setup is on the coldpipe. Did I just come out under a rock?

Are there advantages to hotpipe over cold? I tried searching on here but no dice.

Thanks for any help people!

[brokeAs240sx]

it's really common.

hot pipe allows you to run shorter recirc piping for a lot of setups. for open atmosphere setup doesn't even really matter.

if you are recirculating, technically (though minimally) you get to run the air through the intercooler twice = cooler charge.

it has been discussed, you just have to really search for it.

personally, mine is on the cold pipe side just because of convenience.

[brokeAs240sx]

* isp or zilvia is going weird for me, sorry for the double post *

[KPNITRL]

ooh, cool. Thanks for the insight. Good to see I wasnt just wiggin' out. I kept doing more research and I did find a few companies that sold the bov mounted on a hotpipe for the SR guys.

How would the air run twice thru the intercooler if it was recirculated? Doesnt the air recirculated to the intake, into the turbo?

Its cool about the double post, makes it look like more members contributed, lol

[g6civcx]

We talked about this at least once a month around here. Just do a quick search and see what you can find.

[DOOK]

split the difference and run your blow of valve on the intercooler...

[MisawaJason]

haha, just weld that shit on the top of the core

[Zerolift Autolab]

Most of the BOV installations we do are on the Hotpipe - specifically with SR20.
And most of them are Vent to Atmosphere.

[DOOK]

haha, just weld that shit on the top of the core

nah, just tack weld it straight to the front on the fins.... works like a charm

[MisawaJason]

nah, just tack weld it straight to the front on the fins.... works like a charm

ah, that's what's good in the streets huh? Might have to try that with my new 14. Better airflow from what I've heard

[BPFTW]

I was always told that closer to the turbo is better...but I had it on the coldside on my srt-4 and never had any issues.

I currently have it on the hotside on my sr and have no problems.

[MisawaJason]

I'm going to go ahead and say that at least 95% of the cars that I've seen over here in northern Japan have had it on the hotside of the I/C

[lilredstiffy]

I prefer the hotpipe for looks.

and recirc means no giant hose across engine bay.

[Teambadrun]

I prefer running no BOV at all
so did formula 1 when they used turbos running 45+PSI.

So why should we bother using one??

[brokeAs240sx]

not sure if anyone answered yet, but the idea is:

- air gets run through the compressor
- bov goes off (recirc into intake)
- that same air gets run through the intercooler again

I don't know if that helps any (i.e. if the double cooled intake charge cancels out the heat from going through the compressor twice).

[soreballz]

I prefer running no BOV at all
so did formula 1 when they used turbos running 45+PSI.

So why should we bother using one??
How often did the F1 guys rebuild/replace their turbos and engines though? I promise they do it a whole hell of a lot more often than people like us do.

[PoorMans180SX]

Ball bearing turbos can really just shrug off compressor surge.

But it can't hurt to have a BOV, only help. So why not?

[S14DB]

I was always told that closer to the turbo is better...but I had it on the coldside on my srt-4 and never had any issues.

I currently have it on the hotside on my sr and have no problems.

Closer to the TB is better. You are purging the pipes of air. Most of the volume is in the FMIC. Hot pipe causes air to back flow. Cold pipe keeps the air going in the same direction.

[Om1kron]

My bov is on my cold pipe, i'm 100 percent convinced it doesn't even work.

http://img.photobucket.com/albums/v46/om1kron/My%20Cars/1996%20240sx%20Kouki/2009-02-07%20-%20Together%20Again/2009-02-07013.jpg

Note, I do not have any vacuum lines hooked up at the moment but my bov does have a recirc fitting.

[Addicted2Kouki]

i always thought blow off valves need vacuum to operate.

[allntrlundrgrnd]

^ yes require manifold pressure to activate.

mines:
http://farm4.static.flickr.com/3023/2951510553_d760a33fa8.jpg?v=0


My bov is on my cold pipe, i'm 100 percent convinced it doesn't even work.

LOLOLOL

is your bov recirculating right back into the piping before the tb? thats why it isnt working, needs to be recirc'ed into intake between maf and turbo.

as someone on here put it, how you have it set up "is like farting into your mouth"

[420sx]

difference is minimal at best. it only matters recirc/atmospheric and even then its just a matter of running a little rich for a half a second. boo fuckady hoo. just slap whatever doesn't leak on there and call it a day.