Eaton TVS 1320 Porting & Efficiency Questions

[SeniorCypress80]

Hello Community,

I am working on porting and improving flow on a eaton tvs 1320. I know this is a fairly limited charger with the normal constraints of a traditional root supercharger. I am currently porting these and am looking for tips for further the progress of this charger.

Some of the concerns I'm having are:
- Is there such thing as "too much air " entering the charger?
(went from 70mm TB -> 80mm but adapter goes back to 70mm entering S/C. Opened up inlet & on "race" port, edged center support. Also opened up exit ports for post charger.
- my extreme port resulted in drop of 4 PSI using same P/R.
* If my understanding is correct I'm flowing more air and by removing turbulence its moving easier with less restriction, resulting in lower PSI?

what can I do to further improve flow/efficiency?

thread71-162511

 

[Lou Scannon]

Removing restrictions and pressure drops is never a bad thing for performance but if you're monkeying with the internal geometry of the blower you need to know what you're doing. From the photos, I have no idea what you did or didn't do to the geometry.
Bottom line, only way to know whether you've made a difference at a given operating point is measure true mass flow, inlet pressure & temperature, outlet pressure and temperature, and shaft power (i.e. speed & torque), before and after.

"Schiefgehen wird, was schiefgehen kann" - das Murphygesetz

 

[TugboatEng]

This is a positive displacement pump...

 

[enginesrus]

And if you have to try to improve airflow in that pump, then it is sized too small for the application.
So what exactly was the problem? Induction pressure too low?
Porting is a funny thing, there are cases where head ports have been ported, really fancy, and in the end there was a
loss of power.












edit added, of

 

[Lou Scannon]

This is a positive displacement pump...

In principle, yes, however, they have inlet and outlet losses, less than 100% volumetric efficiency, and various degrees of isentropic compression.
The end result is a map of efficiency contours plotted on axes of corrected volume flow and pressure ratio, which is what I was getting at in my earlier post. Did the OP improve the map for his operating line, break even, or make it worse?


"Schiefgehen wird, was schiefgehen kann" - das Murphygesetz