I cant wait to see the differance between old school and High Tech.
I had no noticable problems without BOV .I tigged BOV on the up pipe right after the inntercooler hose vented to attmosphere and have the daul nozzel alky from Razor closer to the 70mm TB and Hat. Im also running cass stretched stock location,it ran great until the Turbo would deside to take a dump 1000miles or less.This was my experiance with TE-67 and Limit.I cant wait to see the differance between old school and High Tech.
I think they help out more on a manuel car too..When you shift you let your foot off the gas and the throttle plate closes with nowhere for all that boost to go. So the vacuum will pull the BOV open and relieve pressure.
Fast4Ward said:extra insurance against early turbo failure.
This my friend is a very true statement, but with that said, running a BOV on a turbo buick specially if your running anything over 20psi on a big turbo could save your turbo in the long run, if you do a WOT pass at 22psi all that boost that the turbo is creating is going past the blade and going into the motor, once you let off the throttle the turbo still making boost as it is spinning at several thousand RPM's, the air between the turbo and now close blade will have to go somewhere and where it goes is backwards hitting the blade quite hard and this can cause the shaft to vibrate resulting in early turbo seals or perhaps bearing failure, i run one in my car for xtra insurance..IIRC, BOV's were designed to help cars with manual transmissions keep the turbo spooled between shifts. GN's with auto trans do
not have this problem.
Dead head: a situation that occurs when the pump's discharge is closed either due to a blocage in the line or an inadvertently closed valve. At this point, the pump will go to it's maximum shut-off head, the fluid will be recirculated within the pump resulting in overheating and possible damage. By definition, we are deadheading the turbo when the throttlebody closes rapidly..... we didn't turn the compressor off prior to that, it is spinning at up to 120k RPM until we let off..... then it slows down. Although this also typically is talked about with an incompressible fluid, this same principle still applies.
TNTSNBS said:This my friend is a very true statement, but with that said, running a BOV on a turbo buick specially if your running anything over 20psi on a big turbo could save your turbo in the long run, if you do a WOT pass at 22psi all that boost that the turbo is creating is going past the blade and going into the motor, once you let off the throttle the turbo still making boost as it is spinning at several thousand RPM's, the air between the turbo and now close blade will have to go somewhere and where it goes is backwards hitting the blade quite hard and this can cause the shaft to vibrate resulting in early turbo seals or perhaps bearing failure, i run one in my car for xtra insurance..
Have seen plenty myself, i am just saying that a BOV is good insurance to keep your turbo running longer without having the bearings or seals take a beating everything you let off a high boost pass..I'd still like to hear from anyone with any turbo that actually wore one out without a bov before even 50k miles.
... if you do a WOT pass at 22psi all that boost that the turbo is creating is going past the blade and going into the motor, once you let off the throttle the turbo still making boost as it is spinning at several thousand RPM's, the air between the turbo and now close blade will have to go somewhere and where it goes is backwards hitting the blade quite hard and this can cause the shaft to vibrate resulting in early turbo seals or perhaps bearing failure...
Correct me if I'm wrong, but Isn't the overheating rate different between water and air considering one uses conduction and the other used convection therefor making the potential overheating for air far less?
D