First, some news..

I recently redesigned my cooling system due to unable to run the engine for more than about 20 min at high idle without it overheating.  Now I have the good problem.  Granted it was cold..low 60s.  But I was not able to get my oil above about 145 and the water above 185!   I ran it full bore till I got tired of holding the brakes!  I still need to do some work balancing the air between the oil and water.  And I didn’t have the cowl on, so the problem is not completely solved, but I am on the right track!

 

Now the question.

I have the Renesis that has the very small red primaries and the very large blue secondaries.  I recently changed them to all yellow.  This removes the need to balance the flow so much when it stages.  The total output is very similar between the two systems.  Now I have a larger flow when on the primaries and the secondaries kick in with a smaller change.  I removed the large secondary option using mode 6.

So I checked the mixture at 22 inches manifold pressure and it seemed fine with mixture at center setting so I deemed that I didn’t need to change the fuel flow with mode 3.  BUT when I started to let it auto tune, I noticed that it was setting all the bins to -127 until after it staged, then it started to build the graph that you normally see.  It stages at 20 inches manifold pressure.  Is that the recommended pressure?  I expected 15”??

So my question is…Should I set the mode 3 at a lower setting?  This will affect the entire range so I am concerned that I will not have enough fuel at WOT if I do that.  Should I make an adjustment using Mode 2?  I don’t really understand what dynamic range is??   What are your thoughts?

 

Thanks,

Bill B