Please help with reading compressor map :)

[Skalabala]

Hi members.

Please help me read this map. Can get hold of one of these turbos
Map is on the page
http://www.minicooperspeed.com/mini-cooper-r56-jcw-turbocharger-info/

And it will be for a 4efte with stand alone management.

Thanks

 

[weeJohn]

http://www.gnttype.org/techarea/turbo/turboflow.html

 

[Skalabala]

Thanks bud now just need time to study

 

[weeJohn]

I did this a long time ago but I cant remember the result, 315 sticks in my head but that could be miles away lol.

 

[Rev]

A few comments . This map is a 298 kelvin converts to 24.85C ct9 spec is usually 20degC.

Toyosport say CT 9 can push about .117 cum/s ( .13kg/s) at 2.2PR 60% eff. and 20C
This turbo 2080DCB appears* to be at 75% efficiency for the same output.

A CT 12 .145 cum/s ( .16kg/s ) PR 2.2 20C 60% eff
vs 74% eff at 24.85C 2080DCB

Tdo4 13g mitsub .159 cum/s at PR 2.2 20C 70% eff
vs 71.5% at 24.85C eff 2080DCB

The thing I wonder is the lines are very close together on the bottom of the map .
If your boost is not kept high enough you may not get the efficiency and find it wanting from 3000-5000 rpm on a 4e , Maybe some one can comment further ?
* Regarding the temp of the map increased temp will increase pressure so effectly increase the effciency figure ?
If this is the case maybe 75% efficency at 24.8C is really only 60% [ 75x20/24.8r ] at 20deg C probably not that simple though.

 

[Skalabala]

Thanks But I already sold the turbo two days ago
Supposed to be a good turbo as it came from JCW Mini

 

[Rev]

Not too sad I hope as the mini is 1600cc and would keep the turbo in its efficiency range a little easier than with a Starlet.

 

[omikron]

how would a td04hl 15t fare on a std 4efte?

 

[Skalabala]

how would a td04hl 15t fare on a std 4efte?

It will be laggy, but will pull hard till a rod or piston will want some freedom outside the engine

 

[omikron]

ill get a td05 instead then

 

[omikron]

evo 3 td05 acquired now to put it in my box of things