Turbo question ..... it's going on my EFI engine =-)

[Greg Hermann]

>Hi Simon,
>tell us a little more about the application...  Do you have the McInnes
>"Turbochargers" or the Corky Bell "Max Boost" book?
>What kinda engine/ECM ya got?
>Mike V.
>
>In a message dated 8/17/98 12:10:24 AM Eastern Daylight Time,
>questeds at whio.lincoln.ac.nz writes:
>
>>  I'm trying to do the math to size my turbo and I need to now how to
>>  work out at what engine rpm the the air flow will reach PR and if I'm
>>  going to hit the surge line.
>>
Translate "PR"????

Regards, Greg