Turbine housing A/R
Turbine housing A/R
(OP)
I'm looking for a good source of info on how to properly choose turbine housing sizes for turbos.
I feel pretty confident in selecting properly sized compressors, But there seems to be a void in everything I read on the exhaust side. Not looking for some one to do it for me just looking for a really good source for this info.
I've been through Corky Bell's book "Maximum Boost" and the Garrett Turbos website is really good. I just need more.
I feel pretty confident in selecting properly sized compressors, But there seems to be a void in everything I read on the exhaust side. Not looking for some one to do it for me just looking for a really good source for this info.
I've been through Corky Bell's book "Maximum Boost" and the Garrett Turbos website is really good. I just need more.





RE: Turbine housing A/R
Their website has a lot of useful information, and I'm sure if you talk to the owner, he can at least point you in the right direction.
j79guy
RE: Turbine housing A/R
RE: Turbine housing A/R
Another good text is "Turbochargers" by Hugh MacInnis.
RE: Turbine housing A/R
If done on a chassis dyno under load and at full throttle, I think theoreticaly one could find the exhaust gas pressure and velocity at the point in the rpm range just before your desired time to boost. of course I'd have an egt sensor to refrence as well.
I think I might be well out in left field on this but some constructive critisism may do me good.
RE: Turbine housing A/R
The engine running minus the turbo won't be a very good source of data for the engine running with the turbo.
I still recommend the advice in my previous post.
RE: Turbine housing A/R
What you need is a turbine performance map (which includes a flow curve), a just a little background into how to interpret the data.
Hugh MacInnes' book on turbocharging, albeit somewhat dated now, still is the best treatise on turbocharging for the performance enthusiast (sorry, Corky). The book will help you understand the different ways the manufacturers map the performance of the turbine stage.
That's the easy part.
The tough part is actually getting your hands on turbine map data.
A/R is just a proxy for nozzle size, and is based on the principle of conservation of angular momentum of the inlet gas (the tangential component of the velocity).
But get and read MacInnes booklet, as he has explained much better than I can in this short note.
RE: Turbine housing A/R
RE: Turbine housing A/R
Never stop learning !