Position of the candle (angle with respect to the valves)

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Position of the candle (angle with respect to the valves)




by Other » 07/03/13, 05:01

Hello

Note that the position of the spark plug once tightened on the cylinder head the ground electrode is perpendicular with the intake / exhaust valves.
Apparently the mass electrode would have an influence so badly placed in turbulence?
Some make a den on the candle and interchange the candles to favor this position.
I did not check that but it would not be long as the good weather arrives (normally I never worried I screw the candle and that's it)

Andre
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Alain G
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by Alain G » 07/03/13, 07:29

André Good evening!

I always tend to tighten more than the recommended quarter turn, I should also notice the final position of the spark plug to see if it aligns with the valves.

To check on my side too!
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by Janic » 07/03/13, 08:18

This is only possible with a ground electrode, not with 4 electrodes. more this should only have a small effect with direct injection, a carburetor for gasoline, but hardly with high pressures. On the other hand, vortex systems are much more efficient.
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by Christophe » 07/03/13, 12:12

The influence should not be very important because the candles with improved electrodes (2 or 4) do not have a great influence ...
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by Alain G » 07/03/13, 15:24

I tried on 3 cars 4 Bosch electrodes and the result was felt on only one so the position could really influence.
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by Christophe » 07/03/13, 15:30

Feel how? Better performance or consumption?

After: is it the influence of the other 3 electrodes or the angle?
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by Alain G » 07/03/13, 15:41

Hi Christopher!

Better performance (low-end torque) and economy!

In a case of lower performance, on this last Bosch vehicle I did not recommend this spark plug but I still tried to see.
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by Flytox » 07/03/13, 20:00

On a sharp 2-stroke, certain modifications (thermal index, shape of the electrode, games at the electrode) are clearly seen, even make radical differences in behavior / acceleration, etc. ... On a slow four-stroke, never seen big differences ... : Mrgreen:
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