HEy guys I have a mild street ported engine with s4 rotors and ported exhaust holes on the housings. Im running a single exhaust composed of a racing beat header, racing beat presilencer a 12 inch turbo resonator ( its not a straight design resonator it has a curve inside the piping to create back pressure i believe) some piping and a 3 inch inlet to a 3.9 inch outlet exhaust with a silencer which reduces it to a 2 inch outlet ( for even a lil added backpressure). (The entire system is 2.5 piping except for the muffler)I will test my actuators tomorrow but I was wondering if you guys think that this exhaust is enough to even create the require 2.2 psi needed to open the ports. One more thing in my s4 i dont have an aipump therefore my ACV has 2 outlet holes open should I close them with a plate or something or are they just fine being open.

 

i doubt theres enough to open them. make a block off plate for the ACV i just went through that **** with my 6 port accuators and i ended up pulling my intake and i'm getting those pineapple racing 6 port sleeves and just removing the rats nest emissions and all that 6 port crap all together

 

It doesn't take as much to open them as one thinks. I use an 1/8" copper tube connected to a fitting that is tapped into the header. Works fine.

 

just tested them they seem to open about 3/4 of the way but i used white out... so it dries fast ill try to get soem grease and retighten the hoses see if it will help

 

does anyone knows the correct way of routing the vacumm hoses after removing the selenoidsin a fuel injected
engine 13b