Turbo to NA conversion
 

Any tips on converting a 940 turbo to NA head?

Same 530 head; different cam; same ECU; just plumbing?

Thanks

why you want to do that?

sell yours and buy a NA one.

Just switch exhaust manifolds/ header pipe. then remove intake plumbing. find NA ECU/ICU. etc. the opposite of +T.
The 530 head is the same on the NA....well. it should be.

Why do you want to remove the turbo? If it's had it, just replace the turbo or rebuild it. There is nothing mystical about rebuilding a turbo unless parts are broken.

Regards, Andrew.

When we had our turbo replaced a few years back, my mom thought that might be a cheaper thing to do. Just take it off. The conclusion was, if you did it right, you would get a pretty sluggish car. If you messed up, it would be a really sluggish car. One thing to keep in mind, in an engine the intake and exhaust valves are open at the same time for a little amount of time between the exhaust and intake strokes. This allows the last bits of exhaust gas to exit while new fresh charge comes in to replace it. In a turbo charged motor, this overlapping time can be shorter because something is pumping the new charge in and the exhaust out during this time. This requires different camshafts. Now I don't know if Volvo put different camshafts in turbo/nonturbo motors, but my point is there might be a lot of unexpected differences that will ultimately lead to a relatively untuned "de-turbocharged" motor rather than a naturally aspirated motor.

I believe they used the T grind cam in most.... I thought the only difference in the heads where the Turbo models had sodium filled exhaust valve.