HYBRID
Super Moderator <a href="http://www.toyotagtturbo.
then the maltese come & break physics lol 
1st of all very nice writeup tobs.. i just have a wee thing for u to notice, how exception is not always the rule.. now bear in mind you have colder temps in the uk, but here we have denser air which kinda does the same effect (mildly).. waiting for my greddy, im running a ct9 on my (too big for it setup lol) ie a 60mm decat, which turns into a 70mm exhaust to a 80mm inlet backbox which in turn ends up at 125mm at the tip (apexi N1 rx7 backbox) .. also im not running any air filter (unusual isnt it lol).. i have the stock actuator as i couldnt be arsed to buy an hks one & i have a turbosmart mbc FULLY OPEN & what do i get?! ..... 0.8bar at WOT, which by 5000rpms drops to 0.5bar.. y?! well simple coz the actuator is too damn weak to hold the door propperly open..
well my point is a simple one, the angle that the decats ppl buy on this site (ie how much clearnace & turning angle was used internally) could be in fact causing the door not to open enough, or cause turbulence due to the gas hitting a wall infront of it b4 being expelled into the exhaust system, ask sacha or any exhaust expert & they will tell u that exhaust turbulence can cause alot of backpressure problems
not pissin on ur fire dude
u have a very nice writeup, just giving u a perspective from another side of the world 
kon
1st of all very nice writeup tobs.. i just have a wee thing for u to notice, how exception is not always the rule.. now bear in mind you have colder temps in the uk, but here we have denser air which kinda does the same effect (mildly).. waiting for my greddy, im running a ct9 on my (too big for it setup lol) ie a 60mm decat, which turns into a 70mm exhaust to a 80mm inlet backbox which in turn ends up at 125mm at the tip (apexi N1 rx7 backbox) .. also im not running any air filter (unusual isnt it lol).. i have the stock actuator as i couldnt be arsed to buy an hks one & i have a turbosmart mbc FULLY OPEN & what do i get?! ..... 0.8bar at WOT, which by 5000rpms drops to 0.5bar.. y?! well simple coz the actuator is too damn weak to hold the door propperly open..
well my point is a simple one, the angle that the decats ppl buy on this site (ie how much clearnace & turning angle was used internally) could be in fact causing the door not to open enough, or cause turbulence due to the gas hitting a wall infront of it b4 being expelled into the exhaust system, ask sacha or any exhaust expert & they will tell u that exhaust turbulence can cause alot of backpressure problems
not pissin on ur fire dude
kon