um.. let me chime in.
small intro: i made my own turbo kit, utilizing the SPA manifold and a PTE 5858 journal bearing turbo.
This is an image of the custom piping for my car... which i too made on a computer with the measurements.
First off, forgive my... rudeness. i am not known for patience.
Dont be stupid and cheap.
Turboing a 2.5L is not necessarily hard, and it can be awesome, but do it wrong and you could be looking at a blown engine.
a K03 is VERY small for a 2.5L. to illustrate: its a small turbo on a 4 cylinder 2.0L, and its almost choked at 4k RPMs, and then it just keeps on falling up to redline.
so, put a similarly sized turbo on a 2.5 and you would just choke it sooner. whats the point?
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Do it right. use a medium to large turbo. Why? not only efficiency, but also flow. These 2.5L 5 cylinder motors have a relative high flow, similar to that of the 2.8L VR6 motors. Yes, thats right, we have the size and flow similar to 6 cylinders, not 4.
So, when shopping for a turbo think and search for 6 cylinders if its easier for you.
A garret 2876 for example is a great turbo on a 2.0, but a tiny turbo that just produces WAY too much torque and chokes up on a 2.5L.
and a PTE6262 is a large turbo for a 2.0, but its just right for a 6 cylinder 2.8. And as it happens, its a good turbo (albeit a bit laggy) on a 2.5L.
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Cliffnotes:
- dont cheap out.
-SPA manifold is a biatch to work with.
-USE an intercooler.
-use proper tuned software (c2 is not my option)
feel free to post any questions. i