Inliners International Forums General Discussion Blown and Injected New turbo!!!!!!

So, I am STOKED for the purchase of my first turbo!!!
It is A/R .60 with a T3 flange.
Not ideal, but a good stepping stone!!!
Came off a mrk3 supra from Japan. Running 20 lbs boost.
It's only a few months old. The guys got caught racing and lost his license.

I need to find an adjustable external wastegate 5-15?
I'm going to start at 5 and work my way into it.

Is there any merit to the adjustable flow valves I see? Not sure exactly what they do... its just a 't' with an outlet on either side and an adjuster.

Here we go......

What is the difference between a wastegate and a BOV?
Do I need to have both?

A wastegate allows exhaust flow to bypass the turbo to stop it from building boost. If undersized, it will still allow the turbo to build pressure. I don't know if there is a downside to oversized.

A blow-off valve releases excess boost from the intake manifold. If your over-revved or your wastegate was too small and your turbo keeps spooling, this will keep you from blowing things to bits. Plus, it makes a cool noise!

IIRC, a blow off valve is recommended when you have a manual transmission as engaging the clutch can spool a turbo quickly and cause a boost problem. A wastegate is always necessary.

I'm putting both on my automatic, its just safer that way.

Also, adjustable flow valves just block part of your vacuum/boost signal to the wastegate. That way, if you really have 10 psi boost you can adjust it so the wastegate only sees, for example, 5 psi. That would allow you to build more boost before the wastegate opens.

Wastegate regulates how much boost the turbo makes, BOV regulates backpressure to the turbo.

Internal wastegate is attached to the exhaust housing and uses an armature to operate a paddle. External uses a spring/diaphragm to allow exhaust gas to flow past the turbo housing.

Once the throttle plate closes on a carb/throttle body, boost has nowhere to go but back towards the turbo. This can cause damage to turbine wheel/housing and kill the turbo. BOV helps vent that boost to atmosphere or back to the turbocharger.

What are you going to be using for exhaust?

For now, I will be using the stock manifold woth a pipe going under the engine to the passenger side
Probably 2.5" once it is out of the manifold. Unless I come across a 292 manifold or a short tube header.
In case I didn't make that clear I am mounting the turbo on the passenger side.