Cheap cast manifolds that will fit larger turbos

[dUo-sx]

So i ran into a dilemma this weekend. It was suppose to be the a good weekend where i would finally start my build after putting on the turbo. Well the cast manifold im using is a T3 treadstone replica but im not sure if its a cheap ebay cast either. Anyway the point is when i put my 20g tdo6h (t3) on the manifold the turbine housing hit the block and the exahust manifold would not mate up to the head flush.

I tried using 2 manifold gaskets and even shaved some cast over off the turbine housing where it was hitting and its still quite a bit off.

So my question is are there any cheaper cast exhaust manifolds for t3 turbos that support larger turbine housings? Somewhere around 300$?? The thing that really gets me is that its only a 20g and i never saw this coming!


I did search and this was a good post that is exactly the problem im running into posted by the famed JusMx141:

If you use an eBay or Turbonetics cast T3 manifold, you'll have trouble with larger (.82 a/r) turbine housings hitting the block on the front balance shaft tube.

If price doesn't matter, go with the ERL for sure. You won't be disappointed.

ERL would be ideal but a little over budget..

 

[JusMX141]

There is a series of knockoff Turbonetics T3 manifold which is milled at the wrong angle on the turbo flange. Sounds like you have one of these.

If you can track down an actual Turbonetics cast manifold it should provide adequate clearance; buying a new Treadstone copy is also an option.

 

[bastarddsm]

have the head flange milled at a little angle.

 

[dUo-sx]

This would explain alot if its at the wrong angle just didnt seem right. Oh wow never thought of having it milled at a new angle either what a great idea, thank you guys!! I thought i was going to have to spend a fortune finding something that worked *whew* and i really did like how the treadstone/turbonetics cast looked beside the wg placement that is.

 

[bastarddsm]

Get a blockoff plate for the wg hole and run an internal gate.

On mine, all the holes are slightly off. The holes for the turbine flange are shifted about .5" towards the block from where they should be. But a slight angle(2*) mill on one of the flanges should fix it right up.

 

[sethpatch]

just make sure it's prefectly flat and that you dont take tyo much off the surface, I would hate to see it leak after you re install it.