t3/t4 turbine house questions

[dsmless]

so I installed my new gt2876r it as a t3 housing, a sbr cast manifold and the problem is that the turbine housing contacts the engine block were the front balance hump is at, its got about 0.008 of inch clearance with a feeler gauge will this affect anything? do i need to grind down the block/housing? anyone ran into this problem? thanks guys for your help

 

[PreskitVR4]

You may be able to loosen the bolts, wiggle it, pull it away from the block, then tighten them again and get a touch more clearance, but that probably wont affect much even if that doesnt do anything /ubbthreads/images/graemlins/smile.gif

 

[dsmless]

yeah tryed that no help drove the car around a little today it feels good so will give it a try thanks

 

[PJGross]

I have an old school turbonetics knockoff manny (cast T3 with tial flange on runner 1) and with a 4-bolt T3 turbine housing the snail is offset enough that it would hit the block. We used a 1/2" T304 laser cut manifold spacer (I'm not sure who made it) with 2 factory manifold gaskets and longer studs to get it away from the block. It actually works pretty well. From what I recall, the 4 bolt T3 housings have a different offset or at least more meat on the back than the internal wastegate 5 bolt housings.

-PJ