Thread: Not so budget turbo install

From those figures, you are not at maximum fuel yet.

The smoke problem at low speeds is because the full load adjustment screw allows the control rack to travel further, and this happens across the range of engine speeds.

The governor was calibrated for the stock NA engine, but now, with the full load screw adjusted, the increased fuel at low speeds, when the accelerator is depressed, is too great for the amount of air delivered.

This is why many turbo engine have a boost compensator (to reduce fuel when the boost pressure is too low). You have to make that control with your right foot until the boost is sufficient to not produce smoke.

Originally Posted by Dougal

Check for damage or debris on the seats.

There are two types of seals you can get for 37.5deg tapered seat fittings, known as JIC (joint industry council) in hydraulics or AN (army/navy) in alloy fitting circles. One is a latex sheet material that's cast into the taper/shape of the seat and just covers it. The other is a steel stepped piece that cuts into the seat/tube and has a multi layer sealing effect. The main thing with either is that you must only turn the nut to tighten up the fitting. If the male fitting is turned then the (especially the latex) seal can move out of place.

If there's any damage I usually carefully file any raised material and use Loctite Teflon sealant on the seat, none is required on the thread.