Just a guess but sounds like noise or result of very long cable runs on the RPM readings.  Many possible fixes.

 

Carefully read the auto tune instructions.  Yes, the adjustments happen slowly.  Very Important!  This is not Not Pn'P!  Did you follow the instructions to setup Mode 3 (injector flow rate) BEFORE doing any other tuning?  Sounds like it's setting might be a bit high for your installation (no 2 are alike so far). 

 

What's normal for static RPM?  There is no normal.  Depends on your prop, gear ratio, manifold tuning, what you are trying to optomize, etc, etc.  Got any numbers on the prop?  Could give a SWAG if we knew that.  5500 rpm is generally enough to make takeoff power though. 

 

Hey Chris, just had a thought.  Wouldn't ask for free legal advice but how about swapping some for EC2 /EM2 advice :>)

 

Tracy
 

On 8/2/07, Christopher Barber <CBarber@texasattorney.net> wrote:

Ok, I know I have read about this somewhere, but not sure where or what I read means, but I finally ran my engine up to full power and was wondering what kind of numbers I should be seeing.

 

Even though I had some intermentant wire issue (SUPRISE) in that as I got over about 4500 rpm the rpm would flash in the hundreds and then go to zero.  When I throttled back to below 4500 ish, the reading came back.  This happened a few times.

 

However, later when I did it, the readings were better and I was able to run the rpm up to about 5500 rpm at full power on the Mistral Intake (so about 2534 rpm at the prop).  It seem to reach full rpm at about 3/4 (to 4/5) of full throttle and then mostly stablized.  Sounded smooth even though I am still running rich.  It seems to run much better with the mixture at about 9 oclock and bogs as I bring it to the noon position.  In auto tune it seems to be trying to lean but kinda slow and if I try to keep it at the 12 oclock position it seems too rich, so I think I will need to do some manual leaning and then go back to the autotune.  I am idleing pretty smoothly at about 1000 rpm.

 

Is this RPM range acceptable?  Is this good; bad? What should I expect? I was nervous to run it up like this, but I just kept telling myself that I am not gonna be throwing a rod or blowing a jug <g>.  If you remember I do not have coolant temp reading right now, so I closely monitored the oil temp and kept the run short, but I was curious as to what I could run it up to.  Thanks again.

 

All the best,

 

Chris