so I'm trying to get the engine to cruise leaner near 14-14.5 AFR. It runs great at ~13 AFR but what da hell, I want to save some trees and spark plugs

problem I noticed when I'm trying to run leaner is that it would run great for awhile but would run lean all of the sudden (AFR would go to 15+ at idle and cruise). the issue seems to go away when I go into boost briefly.. but most of the times, it would run great. the lean problem is intermittent, and I can't really put a finger on the problem.

All my compensation tables are off. is this because of air temp flunctuations? or injector pump function calibration issue? I can't think of anything that changes my fuel table otherwise.

Also the AFR doesn't really change for almost half a minute when I make small adjustment to the table. when I make big adjustments, it would change right away.. just curious why this is also.

 

Not just saving trees and spark plugs, but running leaner at cruise (go for 15s if your setup will deal with it...most even aggressive ports will...my Bridgeport cruises around the 16s) is going to save a hell of a lot of expense, oil, exhaust smell, engine wear, etc.

Are you in matrix mode or normal mode? In normal mode when the ECU detects cruise conditions it will go to the correction table (don't remember what it is called at the moment). Observe the injector duty cycle and see if the change in AFR is caused by the ECU commanding it, or the duty cycle stays the same and it is a problem outside of the map (ie. fuel system).

 

dare I say it? I'm beginning to think you were right about microtech all along.

when I ask microtech a question via email, what I get is this:
"all our customers are extremely happy with their setup. If you want "xxx" you should get another ecu"

literally...

can't say it didn't **** me off.

I was going to go with their new LT16c, but for the money, I may do something else.

 

Haha yeap once you have played with almost any other ecu you will never look at a microtech the same again. download some software for adaptronic (sekuku or wari) or link (pclinkg4+) or megasquirt (tunerstudio) or any of the others and you will be mind blown lol. step out of the past and into the present. navigate with drop down menus and a mouse. I working on a car today with a microtech. Hadn't used one in a while. forgot how ancient they are . alot of things taken for granted in the newer ecus. sad things is microtech refuse to acknowledge the present and what everyone else around them is doing to push consumer level ecus forward and choose to keep there platform a rehash of what they previously had

 

Hey, at least you got a response! When the LT8s was new, all of those purchasing it were promised continuous software updates to add features. They touted the 32 bit CPU as allowing this. Guess how many updates we have received? I'll give a hint...It's less than 1.

But, what are you trying to do?

 

well I purchased aem infinity 10 only to find out that its firmware doesn't support rotaries. I asked aem and they said currently there is no plan to develop firmware to support rotaries for their series 7 ecu's (8, 10, 12's). so the only aem option is infinity 6/8h. I ended up just smoothing out the tune on my existing microtech lt16. it runs fine, but as you said (and my tuner agrees), it does nothing else and it's pia to tune. I particularly don't like the fact that there is no engine safety with sensor feedback. looks like I'll be doing the safety thing myself with bunch of gauges. although I gotta say I used to like seeing bunch of gauges before going 3 rotor, but I find them pretty useless when I'm having hard enough time keeping the car straight when boost hits. eventually I want to incorporate everything to the ecu with a single warning light and get rid of all my 5 gauges. I'm not in big hurry. My tuner prefers AEM, so i probably just wait until aem come up with something that can control 9 injectors sequentially for rotaries.

 

Megasquirt MS3-Pro. You'll never go back. Up to 4 rotor support with full sequential on everything, engine protection features, excellent datalogging with analysis, autotune, etc. etc.

Or Haltech P1000, but frankly the software isn't nearly as good as TunerStudio.'

You can fake some engine protection with the Microtech.

Obviously set the boost cut and RPM limit.

For temperature for example, you could crank the hottest temp bin up to its maximum so the engine would drown in fuel.

Of course no other options for AFR monitoring or fuel pressure for example.