DIY BOV... What is it and how do you do it... mor important what effect does it have. Finally how do I modify my stock bov to make that sound!

 

 

This guy at a shop I go to says it costs him about $2 in metal to make a BOV.

Crazy.

 

you could probably rig one up with a ball, a spring, and some threaded brass pipe peices.... the same way as a manual boost controller, but bigger... but why?

 

Do you mean this?

DIY Open-Vented BOV

 

Though BDC mentions it in his writeup, I'd like to stress that this setup is about 4/10ths of optimal. I used a big (1.5") blue plumbing check valve, and it still surges at very high boost. My buddy followed BDC's directions exactly (3/4" swing valve, etc) and it flutters pretty bad.

The moral is to get the biggest check valve that you can.

Brandon

 

Actually its very easy. Just go to the hardware store, and pickup a one-way airvalve (relief valve) with a very low threshold (be careful this is important), and -if you want- a silencer, in order to reduce the noise.

Then all you have to do is find a way to block off the hole for the BOV in the intake elbow (if you havent made already the TID mod). Disconnect the BOV from the intake TID, find a small plastic hose that can fit the output of the BOV, and connect the one-way valve (of course with the valve's direction "pointing" outwards from the BOV). Thats it!!!! If you want screw on the silencer to reduce the noise....

 

It's much easier in the long run to just buy a BOV....

 

Nope.....doing the TID mod yourself AND open-air venting the stock BOV at the same time feels soooooooooooooooo good

A nice DIY mod that actually improves performance quite a bit....and costs almost nothing

 

i have a sard bov that vents to the atmosphere. i'm wondering though, is there anything that needs to be done if i were to install it on a turbo II? when i had my dsm, you'd have to run a vpc or something to keep it running rich inbetween shifts (the metered ait by the mas was bled off otherwise and the extra fuel would be there) to keep from stalling sometimes. or could i just throw it on there and it be okay? just wondering......
scott

 

Besides shooting fire when you have a wide-open exhaust, there are no real side effects. No stalling or stumbling.

Brandon

 

Anyone know more about this? I've read that an aftermarket BOV confuses the computer and runs rich while shifting. I'm getting a BOV tomorow and would like to know if it will be a problem in the long run.

 

open venting doesn't work for DSM's works fine for rx7's....

 

SWEEEET!!!!