Blow Through - Vent to Atmosphere
Sep 10, 2008, 01:32 PM
#1
Blow Through - Vent to Atmosphere
well about 2 weeks ago i decided to switch my setup to a blow through set up. the main reason for doing this was because i was tired of trying to rig up a BOV return hose. this thing is ridiculously long from the factory and i wanted something to make it easier to switch between my street and AutoX setup. a while back i got an AMS intake and and buschur lower intercooler pipe setup. these two products were not compatible with one another. the angle and directions of the flange for the BOV off the lower intercooler pipe didn't work with the ams intake without a sever 90 degree bend in it. the picture below show the intake with the stock lower intercooler piping.
anyway to make a long story shorter, i purchased a UR intake pipe and cut the BOV return section out of the bushcur lower intercooler pipe (stainless Steel). on the buschur pipe the return flange is on the upper half of the pipe (nearest the throttle body). then i got me a tial BOV and welded it to the lower portion of the lower intercooler pipe (nearest the intercooler and goes around the radiator). AMS was kind enough to make me a custom intake without the MAF adapter or the BOV return flange on it. so here is the set up.
sorry no pictures of the BOV had it welded on a few days ago and forgot my camera. it is right behind the drivers side fog lamp. i have been running the set up for about 5 days now and it works great. i had some rubber stoppers in the original AMS intake (MAF adapter and BOV return) until today when the custom one came in. I contacted Eric at AMS on friday afternoon and by monday he had the intake in hand ready to ship out and i got it today. thanks a lot to AMS.
anyway to make a long story shorter, i purchased a UR intake pipe and cut the BOV return section out of the bushcur lower intercooler pipe (stainless Steel). on the buschur pipe the return flange is on the upper half of the pipe (nearest the throttle body). then i got me a tial BOV and welded it to the lower portion of the lower intercooler pipe (nearest the intercooler and goes around the radiator). AMS was kind enough to make me a custom intake without the MAF adapter or the BOV return flange on it. so here is the set up.
sorry no pictures of the BOV had it welded on a few days ago and forgot my camera. it is right behind the drivers side fog lamp. i have been running the set up for about 5 days now and it works great. i had some rubber stoppers in the original AMS intake (MAF adapter and BOV return) until today when the custom one came in. I contacted Eric at AMS on friday afternoon and by monday he had the intake in hand ready to ship out and i got it today. thanks a lot to AMS.
Last edited by gotrnet; Jan 3, 2010 at 07:31 AM.
Sep 10, 2008, 02:01 PM
#3
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Very nice. No idle problems at all? Any leaning out at high load / high boost, etc? Is your ECU stock or has it been flashed.
Where did the MAF housing geometry come fomr? Did you cut it out of the original AMS intake tube?
Where did the MAF housing geometry come fomr? Did you cut it out of the original AMS intake tube?
Sep 10, 2008, 02:08 PM
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very nice setup man, very clean!
i love my blow thru setup. i did it a few months ago since my turbo destroyed the screen in the stock maf. my car is much more responsive now, my turbo seems to spool a little faster since now i can have a unrestricted 4in intake pipe. and its nice being able to run a tail 50mm bov too. i would recommend blow thru for anyone who will be staying with stock ecu.
pic of my setup on my evo 8 not as clean as urs but it works lol
i love my blow thru setup. i did it a few months ago since my turbo destroyed the screen in the stock maf. my car is much more responsive now, my turbo seems to spool a little faster since now i can have a unrestricted 4in intake pipe. and its nice being able to run a tail 50mm bov too. i would recommend blow thru for anyone who will be staying with stock ecu.
pic of my setup on my evo 8 not as clean as urs but it works lol
Sep 10, 2008, 02:56 PM
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this will drasticaly change the way your maf reports airflow, the stock tune is very forgiving so it wont matter much (read: ubr rich)
dont do this unless your logging extensivly!
I've gone back and forth with the stock maf and a blow through set up on my DSM. I ended up staying with the stock set up due to gross inaccuracy in the readings of my blow through set up.
dont do this unless your logging extensivly!
I've gone back and forth with the stock maf and a blow through set up on my DSM. I ended up staying with the stock set up due to gross inaccuracy in the readings of my blow through set up.
Sep 10, 2008, 03:11 PM
#6
very nice setup man, very clean!
i love my blow thru setup. i did it a few months ago since my turbo destroyed the screen in the stock maf. my car is much more responsive now, my turbo seems to spool a little faster since now i can have a unrestricted 4in intake pipe. and its nice being able to run a tail 50mm bov too. i would recommend blow thru for anyone who will be staying with stock ecu.
pic of my setup on my evo 8 not as clean as urs but it works lol
i love my blow thru setup. i did it a few months ago since my turbo destroyed the screen in the stock maf. my car is much more responsive now, my turbo seems to spool a little faster since now i can have a unrestricted 4in intake pipe. and its nice being able to run a tail 50mm bov too. i would recommend blow thru for anyone who will be staying with stock ecu.
pic of my setup on my evo 8 not as clean as urs but it works lol
this will drasticaly change the way your maf reports airflow, the stock tune is very forgiving so it wont matter much (read: ubr rich)
dont do this unless your logging extensivly!
I've gone back and forth with the stock maf and a blow through set up on my DSM. I ended up staying with the stock set up due to gross inaccuracy in the readings of my blow through set up.
dont do this unless your logging extensivly!
I've gone back and forth with the stock maf and a blow through set up on my DSM. I ended up staying with the stock set up due to gross inaccuracy in the readings of my blow through set up.
Sep 10, 2008, 03:28 PM
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more importantly, every MAF-t set up is different 
I think I just got unlucky with one.
plus I use DSMlink to log/tune and my airflow numbers were off and it was annoying to correct for it, just an extra head ache so i took the whole thing out.
dont get me wrong, I'm not saying it doesnt work this is a great option and the safest way to VTA your BOV, and in reality your tune should change when ever parts do, so changing the MAF set up isnt a big deal.
now i just VTA and deal with the momentary richness, the ricer in me loves a noisy BOV
I think I just got unlucky with one. plus I use DSMlink to log/tune and my airflow numbers were off and it was annoying to correct for it, just an extra head ache so i took the whole thing out.
dont get me wrong, I'm not saying it doesnt work this is a great option and the safest way to VTA your BOV, and in reality your tune should change when ever parts do, so changing the MAF set up isnt a big deal.
now i just VTA and deal with the momentary richness, the ricer in me loves a noisy BOV
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Sep 10, 2008, 03:39 PM
#8
more importantly, every MAF-t set up is different I think I just got unlucky with one.
plus I use DSMlink to log/tune and my airflow numbers were off and it was annoying to correct for it, just an extra head ache so i took the whole thing out.
dont get me wrong, I'm not saying it doesnt work this is a great option and the safest way to VTA your BOV, and in reality your tune should change when ever parts do, so changing the MAF set up isnt a big deal.
now i just VTA and deal with the momentary richness, the ricer in me loves a noisy BOV
I think I just got unlucky with one. plus I use DSMlink to log/tune and my airflow numbers were off and it was annoying to correct for it, just an extra head ache so i took the whole thing out.
dont get me wrong, I'm not saying it doesnt work this is a great option and the safest way to VTA your BOV, and in reality your tune should change when ever parts do, so changing the MAF set up isnt a big deal.
now i just VTA and deal with the momentary richness, the ricer in me loves a noisy BOV
Sep 10, 2008, 03:50 PM
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kind of OT, but it wouldbe nice if DSMlink (and other tuning software) were like the calculator in windows.
most common buttons presented as default, but if you want to get gritty, click the scientific button (or something similar) and have access to ALLL the goodies.
who ever uses this idea please give me a copy of your software for free
most common buttons presented as default, but if you want to get gritty, click the scientific button (or something similar) and have access to ALLL the goodies.
who ever uses this idea please give me a copy of your software for free
Sep 10, 2008, 04:27 PM
#10
kind of OT, but it wouldbe nice if DSMlink (and other tuning software) were like the calculator in windows.
most common buttons presented as default, but if you want to get gritty, click the scientific button (or something similar) and have access to ALLL the goodies.
who ever uses this idea please give me a copy of your software for free
most common buttons presented as default, but if you want to get gritty, click the scientific button (or something similar) and have access to ALLL the goodies.
who ever uses this idea please give me a copy of your software for free
Sep 10, 2008, 06:18 PM
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i did have an idle problem but i turned the setup 90 degrees and it fixed it. it doesn't lean out at all and prob made it run even richer. i have a wideband installed and it maxes it out from about 4000rpm to redline on rich side. i am still running the stock ecu without any of the reflashes. the maf housed came from UR and i got got reducers to go on both ends to go from the 3" maf houseing to the 2.5" intercooler piping. no i still have the original AMS intake that i will have to try to get rid of soon.
One thing I know from back when I was running blow thru MAFs on Mustangs, was if you put 3x the length of the tube diameter as a straight shot in front of the MAF, it will give better readings, and you won't have to play with the orientation of the MAF so much, if at all.
Sep 11, 2008, 08:25 AM
#12
When I built the intake tube and air filter tube for my car I also had to turn the MAF 90 degrees since the tubing directly in front of the MAF had a 90 deg turn directly in front of the MAF. I installed a wideband somewhere around 800 miles and it's basically read the sam as what you posted, it bottoms out the wideband once boost comes in.
One thing I know from back when I was running blow thru MAFs on Mustangs, was if you put 3x the length of the tube diameter as a straight shot in front of the MAF, it will give better readings, and you won't have to play with the orientation of the MAF so much, if at all.
One thing I know from back when I was running blow thru MAFs on Mustangs, was if you put 3x the length of the tube diameter as a straight shot in front of the MAF, it will give better readings, and you won't have to play with the orientation of the MAF so much, if at all.
