Quote:
Originally Posted by Chuck33079
I missed a step somewhere. Aren't the turbos you have good for a lot more than the 15(?) psi you're running them at? What do you gain by swapping kits that couldn't be gained by working with the existing one?
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The combination of small T25 housings and poor design/flowing manifolds will limit maximum power. So you can put whatever turbo you want on there, you will always be limited to the turbine housings and manifold design.
If you compare any manifold to the F.I units, it is very obvious which manifold will flow more/better and produce much better results.
Remember this picture I took:
T25 .63 a/r turbine compared to a Precision T4 1.0 a/r (that is only a 1.0 a/r housing too, they go up to 1.32)
Whatever air the compressor pushes out, the turbine has to be able to handle as well.