Jean Fouche wrote:

Does the Turbo 13B knocksensor go through to a passage or is it a blind
hole?

Jean Fouche

It is a blind hole into solid metal bolt web. Drilling it out
would be a disaster.

Paul Lamar

Paul,
I will be leaving off the sequential twin turbos that came on my 20B and
running it in the  normally aspirated configuration.  Thus am wondering about
the need to keep the knock sensors.  I was thinking that they are mainly
intended for use on turbocharged engines.  If this is the case and its OK to
remove them when running normally aspirated, what do you think about mounting
CHT probes in this position above the plugs on each rotor housing.  This was
the main question I had when I started this thread.  You are correct:  my
knock sensors mount in a blind hole into a solid metal bolt web which is
continuous with the adjacent solid metal trailing plug boss.  Only about 5/8"
of metal between the trailing plug hole and knock sensor hole.  This seems
like the ideal place for the CHT probes.

What do you think about this?

Sincerely,
Don Mitchell
Standard Velocity - Fixed Gear
N6VV (reserved)
Mazda 20B - NA

You won't need the knock sensors. BTW Are you going to higher compression
rotors?

I think you would still be reading water temp.

BTW Mazda mills the web next to the spark plug out in the 
later turbo rotor housings so be careful about drilling the hole.

Paul Lamar
 
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