89_740Turbo
New member
- Joined
- Apr 10, 2018
- Location
- Central New Jersey
If your turbine housing has the matching step in it there is no reason to flatten the manifold.
You cant just pull a flat turbine housing up to that raised circle as it will warp the housing when it gets hot.
I've seen the turbine housing and down pipe glow. Like one time when the MAP sensor hose popped off and it went full rich.
I never intended to machine the hotside turbo housing inlet flat and mount it up to the raised lip on the 90. I guess since mine has both lips that fit into one another, there isn't a point in machining anything other than a resurface touch up to make them fit nicely