vr4 turbo question

[keith-b]

does the turbo's on a vr4 both kick in at same time or which way do they work wat rpm does which kick in at and also can i fit a boost gague to each turbo

[andydckent]

Both work at once. Can't really tell you anything else.

[Turbo_Steve]

does the turbo's on a vr4 both kick in at same time

Pretty much: they're in parallel.

which way do they work

One per exhuast bank.

wat rpm does which kick in at

They are both spinning even at idle. They generally start being efficient at around 2700 -3000rpms.

also can i fit a boost gague to each turbo

You can. They will both read almost identical, as the compressor side is commoned, as are the wastegate feeds.

[keith-b]

Pretty much: they're in parallel.

One per exhuast bank.

They are both spinning even at idle. They generally start being efficient at around 2700 -3000rpms.

You can. They will both read almost identical, as the compressor side is commoned, as are the wastegate feeds.

cheers mate i just want a gague for each turbo so i know if they are both boosting together or if one turbo is weaker etc

[Nick Mann]

Both turbos blow in to the same pressure system. It will be more complex that just measuring pressure to see if they are working the same way, I think. I'd guess you need to measure flow from each, as the pressure will be fundamentally the same.

[Turbo_Steve]

yah. Two turbos blowing into one pipe: so the pressure will be equal. Best bet would be to measure EGTs on both sides: the weaker turbo will be running hotter as it's less efficient for the same pressure.