When major changes like this are made you should start from scratch on the MAP table, (reset mode 1), center Mode 6 with the program knob at 12:00, and reset Mode 3. Then use a higher MP (24 - 26") to set Mode 3 which is the current instructions in the latest manual.
Next do Mode 2 at lowest manifold pressure your engine runs at.
Next do Mode 6, checking the staging transition for smoothness. Note! if staging is not smooth at the default setting It means you haven't got Mode 6 right yet!
After these steps are done and working correctly, then and only then should you start adjusting the MAP table using Mode 1 or Mode 9 (I like using 9 the best).
I recommend using the 4 yellow injectors for builders that have the 6 port engine but there is no reason the 2 red & 2 Blue setup from the 4 port engine won't work if you follow the setup described above. It's so smooth, I can't tell when my engine stages with this setup. If your stumbles or otherwise misbehaves at staging, it means something is not adjusted right. Do not accept anything less than smooth staging.
If you think this is a complicated and difficult proceedure, you've never had to rejet a carburetor.
Tracy
On Sun, Feb 21, 2010 at 4:33 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
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
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