14 apache

If I was in fresh water I would run closed loop and not worry. But the salt is a killer.

underpsi68

I run my car open loop all the time with no issues. If you have a good ecu and someone that knows how to program it, it shouldn't be an issue once you get the the tables programmed.

Apache I'm on the south Shore in Nassau if you want to see how it works.

14 apache

That would be cool what system you running in your car? A few people I know run it one guy does drag week with his 56 chevy and he loves E85. Going to be running Holley dominator with the smart coils.

underpsi68

I run an Autronic SM4 (Australian).

The owner of the shop I use to dynamic my car used it on some of Zuls engines I was impressed by how when the unit works and the data logger

Did you by the Holley yet?

14 apache

Yes had it for years new in the box. Big reason I went with it was for self learning and smart coils hate the RF noise MSD gives off. Save a lot of fuel on the dyno.

underpsi68

The auto tune feature works great on some units. It definitely saves time.

14 apache

https://youtu.be/qwkqjotkDJQ One more thing I like about this it has 31x31 load table or 32x32 forgot. Most are not that big.

underpsi68

A lot of load cells are good. A good ecu can interpolate between the cells with good resolution. Here's a video of dynoing an engine using the Autronic while using only one load/rpm cell up to 9000rpm. https://youtu.be/vZQvB0KD5NA

14 apache

The engine is being run on an Autronic PnP Honda ECU.
The video was designed to show the power of the Autronic and how easy it can be to get an engine up and running and very quickly tuned versus other systems.

It takes less than an hour to go from non-running car, to having something that makes great power, holds consistently good A/F ratios, starts everyday when cold, and has terrific driveability without constant tweaking.

We did not use any of the auto-tune features in the video.

The Autronic software works differently than most others out there {including the big name brands}

The Autronic software has a very complex modeling software built into the background of the software to actually predict the airflow of your engine based on a few simple parameters you put in during setup.

Once the model is complete {which you never see behind the scenes} the software is so powerful that it can run your engine very well with only one single cell in the table.

You can, of course have as many cells as you want{up to 512}, but what you find out is that when you are all finished tuning the engine, almost all the cells have the same number or something very close so the table looks very flat in 3D.

With all other brands YOU the tuner, must create the "model" of the the engine's airflow by placing bigger or smaller numbers in the base fuel table until your 3D image looks just like the engine's airflow curve.

With the Autronics doing the model for you, the base fuel table is simply used as a way for the tuner to tell the software when the engine's actual airflow doesn't match the model it created. The model is typically very accurate {as evidenced by the fact that most numbers in the base fuel table are the same or very close}

How good is it at modeling the engine? Watch the video again. No tricks, no slight-of-hand, just basic math and lots of it.

This video was done with a high compression N/A engine, but the software works just the same even on turbo'd cars!

Using the AutoTune feature simply allows you to operate the engine in various RPM and load cells and the ECU modifies the numbers in each cell to tune the engine with no input from the user. Its really cool to watch and its amazing how fast the ECU can tune itself on the dyno, but on the street it might be easier for a good tuner to do it manually since its hard to hold a constant load and RPM.


I did not under stand how the single cell worked until I read this. It uses other information to be able to pull it off. Pretty cool ECU. Same one you have?

underpsi68

Yes I am running that ecu. It is a good video to show how the ecu works but honestly you need more cells. I use every cell that I can, ocd i guess lol