Relatively speaking could anybody tell me what PSI was being exerted on the turbine in comparison to whats being put out from compressor? Would it not have to be equal or greater to the pressure leaving out of the compressor? ie PSI turbine side = PSI out compressor side + losses?. If you need to use an example please just use a standard turbo system that tech info is readily available(garrett, dsm etc.)

I'm just curious how much pressure it takes going through into your turbine (Hot side) housing to produce X PSI out of the compressor. Are they equal? or is it greater in the HOT side due to heat, and losses?

Pretty much I want to know how much PSI I need to put into a turbine to get X PSI out of compressor. I'm sure this incorperates compressor efficiency, but I'm just looking to know the rough relation.

Please go easy on flamming, I'm having a hard time wording the questions so I get the information I'm actually after. Thanks in advance to any help provided!

 

After you get the turbo specs, it will take you some mad thermodynamics/aerodynamics computation to figure that out.

You will need to know displacement, mass flow, exhaust temperature, and a whole lot more to shoot that one in the dark.

Good Luck.

 

Pressure in = Pressure out - losses ONLY if the turbine wheel and the compressor wheel is exactly the same.

 

typically you will see about 1.5 to 2x times exh manifold turbine pressures.

i dont know how to caluclate it.

if you get anything more than that it means your turbine housing is too small.

high reving engines with divided runners and big a/r housings and large cams will see closer to 1;1.

OK PEACE OUT

the only way to know for sure is to measure it with a pressure guage.

 

Right on guys! Thanks alot. Exactly the sort of help I was praying for

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spets &raquo;</TD></TR><TR><TD CLASS="quote">Pressure in = Pressure out - losses ONLY if the turbine wheel and the compressor wheel is exactly the same.</TD></TR></TABLE> Could you elaborate? If both the turbine wheel and compressor was exactly the same? You mean if they were both turbine designed/shaped?

 

What are you even trying to figure out? And the post you are asking about doesn't make any sense to me either.
Do you know how to read a compressor graph? A lot of your questions might be answered with that..? And keep in mind the turbine aspect of that graph too..

 

I was trying to figure our compressor/turbine efficiency relative to PSI. I wanted to know how the pressure put out of the compressor, was related to the pressure put in on the turbine.

 

Well, you're not going to be able to figure this out exactly as you want to. Aside from looking at compressor and turbine efficiency graphs, keep in mind the motor itself affects this just as much as the design of the turbo.

As far as just the turbo, here's something sort of interesting to think about. It is possible to make a jet engine out of a turbo. What does that tell you about compressor vs exhaust press and flow rates?

 

i was logging this last summer
the yellow line is backpressure and purple is boost
it was a garrett t04e 57 trim[IMG][/IMG]