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On another subject - while flying Friday, I turned the cold start
switch on and the engine quit - I adjusted the mixture knob all the
way lean and it would not run. I than decided to turn the cold
start off! I'll install a switch guard on it soon.
This is going to be the case on the 4 port Renesis if the engine is staged (running on primaries only). The injector pulse width is large when staged because of the relatively small primary injectors. When you turn on the Cold Start switch it turns on the big secondaries and swamps the engines capability to burn all that gas. If the injectors were the same size, the mixture knob could compensate for that but there is not enough range to handle this situation. That's just one side effect of having large secondary injectors.
Tracy
On Sat, Mar 27, 2010 at 10:17 PM, Dennis Haverlah <clouduster@austin.rr.com> wrote:
Kevin,
I used the RX-8 plugs that were in my engine when I bought it for the
first 200 hrs of flight. They has 9400 miles of highway driving on
them first!
I changed them last week and could not tell any difference. They are
the iridium plugs.
On another subject - while flying Friday, I turned the cold start
switch on and the engine quit - I adjusted the mixture knob all the
way lean and it would not run. I than decided to turn the cold
start off! I'll install a switch guard on it soon.
Dennis Haverlah
Tracy Crook wrote:
The Renesis IS
a 13B, just the latest version.
RX-7 plugs will work fine in it. The RX-8 plugs are Iridium and they
do last longer but are not a necessity. Mine have passed the 300 hour
mark and are working fine (with very little 100LL).
Tracy
On Sat, Mar 27, 2010 at 9:10 PM, kevin lane <n3773@comcast.net>
wrote:
my engine ran today, first time!
pretty rough, but I used the plugs that came with it.[they all seemed
to spark] my engine was built by Bruce, a 2004 renesis, but I'm not
sure which plugs to use. the rotor housings say "13B". do renesis
engines have that? consequentially, I'm not sure whether I use renesis
or rx-7 plugs, or if it really matters. if someone has some plugs that
will work and wants to sell them , let me know. looks like these plugs
run almost $25/each?
--
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