blow off valve? on our trucks?

[TRACTJDS0428]

Ive been seeing pictures of our trucks with blow off valves. Do they work? Do they help? Anybody running them
Have pictures or notice a difference?

[oldestof11]

Probably an external wastegate. They're used to bypass the exhaust gousing on the turbo better than an internal wastegate.

[TRACTJDS0428]

This one looked identical to a blow off valve ive seen on turbo gas eninges (SRT4s and GTRs). Was mounted in the intake horn just before the intake heater. I thought they would only work on a throttle body engine because of vaccum.

[Tacoclaw]

Seems pretty pointless to me, not like we've got a throttle plate snapping shut to bark anything.

I guess you could rig one up to a switch on your throttle linkage so opened with vacuum-pump vacuum when the throttle was at an idle, but I think a correctly-sized turbo would make more sense.

[BC847]

http://www.competitiondiesel.com/forums ... p?t=126690


http://www.jgsturbo.com/wgpg.html

[absentheart]

Thank you for the links BC847, I've always wondered what business BOVs had in a throttle plate-less engine bay. They have rigged the valves to vent intake pressure when drive pressure falls off. It would also seem from the sigs of the users in that thread that I would need to be running more than 30# of boost before this would a priority.