boost controller

[madwoody]

Have a couple of things on my mind.

Alot of people put restrictor rings in a j spec supra why is this? the reason i ask is if you have the said ring in the spool up time on the turbos goes down (well it does on mine).

so if you have a boost controller installed does it

1 control the boost by operating valves to control the boost at a set presure

2 limit the high boost by operating a valves so as to not have to much presure in the system

3 limit the low boost some how

i've asked these questions because i can't understand why we put a restrictor ring in, my car has not had one in for about three years now i've been messing around with the apexi valve which because of the size it makes it a restrictor ring of about 1.25 bar

Just wondered if there was anyone out there who knows (not thinks they know or was told by someone else) that you need a restrictor ring in