Supercharger Pressure Release Valve Location

Racer75

Tuner
Points
107
Location
Scotland, Glasgow
Car
BMW 323i (e36)
Hi all.

I have a blow through supercharger setup (maf and TB after SC) and I was trying to find the best way of locating a Pressure Release Valve.

Currently, I have both a Bypass valve and a Blow off valve fitted with <1bar springs in each. I was curious as to whether or not this is the most efficient setup. Does anyone else have a similar setup and what do you run to make your engines run optimally?

Cheers
 

thexav

Pro Tuner
Staff member
Points
387
Car
2002 Clio 172
Personally I use a partially atmospheric BOV, some ECUs don't like the drop in pressure and missing air. I guess you've mounted after the MAF, which could be a problem, you don't want all that air registering and fuel being pushed in when most of that air is going to be vented away.
 

Racer75

Tuner
Points
107
Location
Scotland, Glasgow
Car
BMW 323i (e36)
Hi mate, thanks for that. Currently I have the BPV set up after the MAF and the BOV just after the intercooler but well before the MAF. I thought I’d use the BOV as a sort of Overboost protection sort of thing
 

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