so i have the edge turbo and it has no wastegate. Can someone exlain how a non w/g turbos works?

 

Having no wastegate makes it simple. The exhaust spins the turbine, the turbine spins the compressor, the compressor builds boost.


With a non wastegated housing you need a bigger housing so the exhaust gasses don't choke up. When running a wastegated housing when full boost is built the wastegate opens and allows some of the exhaust to bypass the turbine thus a smaller housing can be used.

Clear as mud?

 

Very well put ph4tty

 

so this means that there is a larger gap between the exhaust wheel and housing to move freely when boost is no longer needed, instead of having the excess exhaust release via wastgate?

 

Less boost right away but when it hits it hits... My 1st gen had a 18cm housing and it had no spool till halfway or 3/4 way through throttle. I think 16cm housing is ok for our trucks if it's not waste gated, I am no expert my info is just from reading on here and a few other sites combined with my diesel shop here in town. I know more will chime in with better and more specific info for you

 

I think it just means that it needs more of a volume of air to start spool up, it takes more air at a faster speed in a larger housing than in a smaller housing which causes larger housings to have more LAG, W/non-gated housing any right foot action will go through the turbo none will bypass the charger, in low throttle conditions the air is not forced into the housing fast enuff to be compressed it just goes through the exducer wheel lazy ahd not forced through which would cause boost. Hope this is right chime in if I am no where close to the answer or I am giving false info!
Brandon

 

now what does my turbo do to release the extra boost pressure

 

Good explanation, Brandon.

Powermad-- your turbo cannot release extra boost in the sense that the boost is ONLY controlled by how hard you are into it.

A wastegated turbo will allow a bypass valve in the exhaust to open at an established boost point and reduce the energy driving the turbine, thus holding boost at a constant point (ideally-- sometimes they let boost creep slowly higher).

Justin

 

The wastegate also performs another function and that is to control maximum boost pressure. From the factory the waste gate on my 02 was set control boost to a maximum of about 20 psi.

Jim

 

Boost control is the ONLY real function of the wastegate-- it manipulates the turbine to control boost.

The factory HO spec is 21psi for WG setting on trucks like mine.

jh

 

Yeah, LURCH

I need to read better.

Jim

 

so if i am on it at 30 psi and let off and it surges will it have a higher chance of blowing? and does anyone know a good set up to make the non w/g turbo into a twin setup?

 

No. You have the same chance of blowing a wastegates and nonwastegated turbo. I think you are confusing a wastegate with a blow-off-valve (BOV). If compressor surge is a concern, then a BOV is what you need-- or a talented right foot.

As for making the non-wg into a twins setup, you'll need an external gate and some custom fabrication to plumb it.

justin

 

no i know the differance between a w/g and a bov, im just confused on the surging. does anyone know any websites that have a set up i can run as twins with my turbo. or if i could get an external w/g and a k31 or a aurora 5000 to work as twins?

 

hmmm... any ideas anyone?