Question on downpipe, immah noob i know!
 

Hey i got a question.. supposivly the IHI RHB5 will be stock actuated at 8 psi.. what if i run a 2 1/4 inch downpipe (kinda smaller) how much will that lower boost? also then technically i can up the boost correct? or will i have too much of a boost spike if i go with a smaller DP? help will be much appreciated

Re:Question on downpipe, immah noob i know!
 

a smaller exhaust will not cause you to have less boost, it'll just have slow as ---- spool time. Regulate boost with the wastegate or boost controller and make your downpipe as big as possible

Re:Question on downpipe, immah noob i know!
 

won't that be kind good for the IHI considering i've heard it reaches full boost at ~3000rpm???

Re:Question on downpipe, immah noob i know!
 

also i'm using the stock o2 housing and then bolting on a downpipe, is that good enough? i'll make it like 2 1/4 or 2 1/2 we'll see.