Bobby,

I used 13 B plugs in my Renesis during a lot of my ground runs - this was when we were having problems at higher rpm with the CAS not being compatable with the EC-2.  Once we added the zenor diode and resistor I compared both the 13 B and Renesis plugs.  I did not see any notable difference in ground testing.  I now have over 85 hours on the original Renesis plugs that came with my engine (9,500 miles on the car when it was wrecked).  I use nothing but Mogas and have my fuel pumps mounted on the floor behind the firewall of my RV-7A.  I have not had any vapor lock problems at temps above 95 deg. in the summer.

Several days ago several posts showed problems with cowl interference with 13 B engines.  I've found that when using the Renesis engine the water pump outlet, alternator mount and oil fill can easilly be modified to fit the RV-7A using the James Rotary cowl.

Dennis H.

Bobby J. Hughes wrote:

Any problems using 13B sparkplugs in the Renesis. I have a set of the expensive Renesis plugs but would prefer to use less expensive ones for the first few hours. I seem to be running out of things to wire so I may attempt an engine start in a couple of weeks.

 

Bobby J Hughes