Manifold difference??

NoDOHC · \r\n \r\n \r\n 04-23-2009, 10:05 PM\r\n \r\n \r\n

Ill get pics tonight but While taking my turbo off looking for an axhaust leak i discovered that my manifold is cracked. I have an extra one but when i went to get it i noticed that the one of the car has an extra pencil sized hole in it and a flap thing and a big actuator for the flap. The one without is off a jdm car so im assuming that its emissions junk. I just want to be sure. So if anyone know the difference let me know. My car is an 88 s4 tenth ann. The jdm turbo is also s4. Also how freely should i be able to spin the turbo by hand. the one off the car spins really easy but has no side to side or back and forth play, neither does the jdm one but its a little stiff to spin, is this do to it not having any oil in it to lubricate it?? Oh and when is it neccessary to port the waste gate? Im running stock boost but have a more freely flowing exhaust. And whats the difference between a recirculating blow off valve and an atmospheric one, besides one venting back before the turbo and one venting to air. The sound is cool but it recirculates for a reason right? this is my first turbo anything lol

I forgot to mention that one manifold has k5 stamped on it and the other has k7 on it