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BOVand lAT question


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#1 croquest87

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Posted 21 February 2018 - 07:01 AM

Hello everyone   l understand best place for IAT sensor is between intercooler and throttle body. How about the BOV?  I can install it before or after IC as l am in the process of making intercooler piping. Also should I have BOV before or after IAT? thank you gentleman

Edited by croquest87, 21 February 2018 - 07:34 AM.






#2 importwarrior

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Posted 21 February 2018 - 07:53 AM

probably does not matter because the stock mas air sensor is before the turbo.
apples to oranges

but I would put it between the BOV and T body, mine was in the in take.

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#3 psu_Crash

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Posted 21 February 2018 - 01:17 PM

IAT should be as close as possible to (or in) the intake manifold for the most accurate reading.
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#4 NotStock88

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Posted 21 February 2018 - 01:22 PM

I chose to put my bov on the pipe between the intercooler and the TB... also I put my IAT sensor after BOV before TB
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#5 croquest87

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Posted 21 February 2018 - 03:24 PM

Thank you all much apreciated  have a good one

#6 Chad

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Posted 22 February 2018 - 08:06 PM

On my custom MPI's, I place a 3/8 NPT boss near the throttle body for the AIT sensor.  Some plug it and put it on the other side of the throttle plate.

Both sensor locations will work.  

Putting the sensor in the intake itself exposes it to some heat soak after running the motor and shutting off, then trying to restart while it's still hot.  Putting it so close to the throttle plate helps minimize this effect because it's exposed to a good flow of intake air.  Most that report heat soak I think had the sensor further from the throttle body, somewhere in the plenum where the air is more stagnant and recycled.  If you want to avoid this, you have to put a boss in the intercooler plumbing for the sensor as close to the throttle body as practical.  It's only a problem on hot starts, and you can can probably tune around it anyway.

There is no demonstrated benefit to putting the BOV before or after the intercooler.  I've seen many setups used, all worked fine.  I put mine just before the throttle body so the BOV doesn't see hot air, and so the air doesn't have to back-flow through the intercooler to discharge pressure when it opens.  I've seen OEM BOV setups do both before and after the intercooler, so I doubt it matters much.

#7 croquest87

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Posted 23 February 2018 - 12:00 AM

Sounds good thank you sir




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