I've seen a lot of fast turbo v8's using a second wastegate as a bov in the cold side charge piping. What is the benefit of doing this compared to using a tial 50 BOV?

Do you open the gate while staging to get the turbo spinning up? Then slowly close the cold side BOV as you can use the power?

Regards,
Justin


Modified by Justin Olson at 6:34 PM 1/21/2006

 

i know older formula 1 cars used pop off valves to limit the boost. this was to limit the overall power output of the car, kinda like a restrictor plate on nextel cars. but a gate on the cold side, i would think that this would cause irregularities like boost not staying steady, or up and down not a constant hold. understand? i hope? he hee

 

you are probably just mistaking it for a WG

 

Well I remember reading about the very high hp drag guys using what functions as a bypass/recirculating valve on their large turbos. Basicly routes the coldside's outlet back to the inlet to spool the turbo. Anti-lagging the motor would have to done at a lesser amount, since the turbo would go from 0 psi to med-high psi in a fraction of a second as the bypass routes the air to the TB.

It would be more like a motor & clutch. The motor spins freely w/clutch disengauged, then applys lots of power when you pop the clutch.

 

They do that to relieve the compressor from resistance of building boost, allowing the turbine/shaft speed to come up fast on the line. Big turbos have big heavy wheels and take alot to get going, but they will keep going easy from the inertia the wheels carry.