Hello all,

This is in regard to the spark plug cool that is being discussed. I

came

across this on the RX7club.com site. I pleasantly surprised to see the
amount of technical experimentation that some on this board try. I

send

the good nuggets I come across.

http://www.rx7club.com/showthread.php?t=751977


Rob Woods

Interesting thread. So far it has been unnecessary to modify the rotor
housings
for rotaries used as aircraft engines. These guys may be at the 150 to
200 HP
per rotor level. Here is a trick all should do if they get a chance.
It relives any steam pockets that may be generated around the spark plug
area.

Also the  3rd gen water pump and RX8 water pump are less than ideal.
The Rx8 in particular as it is much smaller than the 2nd gen water
pumps.
Somebody is already making a better impeller for the RX8 engine but I
have not
tracked it down yet.

The bottom line is you need to know what is happening and the only way
to know that is measure the "cylinder head" temperature with thermal
couples
embedded in the roto housings.

Paul Lamar


"Better" Rx8 impeller is made by Rick Engman in Atlanta, at Downing
Atlanta.

www.Mazdatrix.com
Mazdatrix Inc.
2730 Gundry Ave.
Signal Hill, Ca. 90755
562-426-7960

Thanks Dave.

Paul Lamar