I don`t run a stat, not sure why it would make any difference . All coolant enrichment is turned off.

I used a big marine cooler and an oil thermostat...in my setups to keep engine oil up to temp. Was very impressed with my temps even in 50° water.

If I understand it,the learning will not turn on until the motor is at 160 deg. ?

Yep this is true on my current Sniper setups. That may pose a bit of a problem, if I remember correctly my engines run pretty darn cool. I am not sure where the temp sensor is at, they recommend a cylinder head pickup which I believe is going to read hotter than where it is now.

However, even with "Learn" inactive, the system still corrects and makes "Closed loop" changes on the fly to keep everything safe and at your commanded target AFRs and Timing table specifications. However, these changes do not write into the Learn table without the engine being fully warmed. So essentially it may do the same 20% correction every time coming out of the launch on fuel, but without being over 160, it's not going to save that.

I'm getting to be a pretty good tuner with the Holley system and with data-logging and monitoring am able to perfect and apply the closed loop corrections even without the aid of the learn table.

Sniper must be different ...I uncheck the box and done . V5 software

No sir, Sniper has the same exact screen. Closed Loop is different than learn mode. The only time you would want the Closed loop to be restricted based on RPM/CTS/TPS etc. are very specific situations. Like perhaps, if you have a decelerations fuel cutoff tables turned on and want it to leave <1500 RPM alone, or if you don't want it making closed loop corrections to your hot or cold idle etc. Closed Loop are UNSAVED percentage (%) corrections from 0-100 that the computer automatically makes during all situations to maintain your commanded level of fuel and functions off of the O2 sensor constantly. Also, worth noting that once you have a good tune in place, you will want to significantly decrease the compensation limits across the board. Usually something around 25% at first and then it can be further reduced to 2%ish in the idle range and 10% in other areas. This also protects against O2 sensor decay. Notice your table is 100% across the board in that pic which basically means at any point the computer can make serious corrections when you might not want it to.

Learn always requires 160 and above. Learn changes are actual sticking changes made to the Learn table which is separate from your Base table. They function over the top of each other. Without "Transferring To Base" or making manual changes to the Base, the Base table always remains the same as setup upon install. Then the Learn table functions over the top of it to make changes when above 160 to correct. These changes are percentage modifiers of the Base table. The reason learn requires 160 on the CTS is because the system is based upon normal operating temps. Then you have Startup Enrichment, Coolant Temp Enrichment, etc. to correct for different temps, throttle position, etc. But Base is always around normal operating temps and then all of the modifier tables are variations upon that.

If you haven't already, you want to let a good learn built up, Transfer it to Base, then spend some time CAREFULLY manually smoothing the graph. That is the most important part. Also, make sure your Spark (if applicable) and commanded AFR tables are relatively smooth and safe.

Great points, Thor39

The coolant temperature does not effect the learn parameters. The coolant enrichment must be at 100% in order for the learn to activate. Same thinking as Thor pointed out, no point in modifying your fuel table before the engine is up to temp, but the software lets you determine what point warmed up is.

So are you saying that if I go into Coolant Enrichment and define 100% Enrichment at 80 degrees on the CTS the learn mode will kick on at that point and I'll see "Learn Active" on the dash? I'm not saying you're wrong but I'm pretty sure Holley has that 160 temp set there across the board. I have not read ANYWHERE that you can change the temp of the Learn model activating and I've read a lot of documents, threads, and posts on Holley EFI forums etc. I really wish I could lower it for cold idle etc. at least in my earlier days of tuning when it was taking me longer to figure things out. If you're right I'll be happily surprised. Thanks.

On the HP and Dominator systems, yes your learn goes active when the coolant temp enrichment is 100%. Remember the system interpolates between table values so if you have 120% at 80 degrees and 100% at 100 degrees and your engine temps drop below 100 degrees the learning will shut off.

I run in Lake Michigan with no thermostat. My water temps run right around a 100 degrees and I use closed loop and learn while running.