Yeah that was my thinking all along, I've just haven't had time to mess with it. I am talking about the drag track but the same principals still apply. The 2-step and the launch are likely causing higher EGTs than what I normally see during tuning.

 

I have not posted anything on this thread yet, but have read all the good info a couple of times. I am still working on getting my AFR and Timing maps in check since my build. I am interested in using LS in a modified format and get sidetracked here and there.

I can confirm that my logs from my first track day (about 2 hours worth of CA speedway) show significantly different indicators than my zillions of 3rd gear pulls near my home. Stepping through all gears at WOT, and just doing a burst at a time provides significantly different data.

Doing a thorough tune is very time intensive and for those that speed it up to make it profitable, are leveraging many years of experience and knowledge.

I also found PCYang's article very helpful, as I am just at the point beyond the more basic "How to Tune and Evo" thread, and dabbling in more advanced concepts and topics. If anyone has more resources they can suggest I would like to read them.

Thanks

 

Just looking to get some feedback on timing map, this is first go of self tune. Mods basic bolt on's in sig. I cant get HP and TQ curves to smooth out. Meaning I always am higher in TQ than HP. Maybe i am at limits of mods?

 

How much boost are you running and what afr?

 

12-5-12.7 during spool and from 4k-7k its 11.5 tapering to 11.0 @ 24LBS tapering to 21.5.

Oh yeah 93 octane

 

Could you upload a map trace of third on that one or a log?

 

Here is a log from week or so ago.

 

From what I can see on the log here is what I would if it were me:

- Drop timing 1* in the 4k-5.5k : 200 - 260 load range
- Add timing 1* in the 6.5k : 220 - 240 load range
- Add timing 1* in the 7k - 7.5k : 200 - 240 load range
- Smooth map for changes
- Test to see if that helps

Your losing momentum from 5187rpm to 5593prm when timing drops from 6* to 5* then with 1-2 knock counts

Your losing momentum from 6656rpm through then end of the pull when timing decreases from 11* to 10*

That is where you're losing your power.

If I am incorrect in anything I wrote, someone please correct me.

Hope it helps.

 

Hey bud, in this post are you referencing the "Knock Load" table or the "Load Required for CEL on Knock" table? The reason I ask is I changed my Knock Load table to look like this:

RPM LOAD
500 159.375
1000 159.375
1500 159.375
2000 159.375
2500 100
3000 100
3500 100
4000 100
4500 100
5000 100

This solved my issue with the knock that I was seeing between 3000-3500 at part throttle (60-70 load) but I want to make sure that I'm not just turning a blind eye to the problem. In other words, what exactly does the Knock Load table control? Does it mean that the ECU won't recognize any knock below the load values even if the car really is knocking. Or does it mean that the ECU will still see the knock but it just won't pull any timing when it does. The full title of the table is "Knock Load- Knock Ignored Below These Values" so it's the last part of that title that has me confused. What exactly is the ECU ignoring??

 

at those low of loads there isnt enough cylinder pressure for the knock to do any damage

 

It doesn't register any knock below those loads. So you won't see any knocksum, and there won't be any timing pulled.

 

you can run more timing up top to help raise the hp

 

djchopps, if you post your hex file, I'll show you what kind of corrections you should make with your own map.

 

Thanks for the responses. I dropped the load above 2500 RPM down to 40 tonight and didn't see any knock so I think I'm good. But I still think it's strange that before I changed it, whenever I hit 60-80 load between 2500 and 4000 rpm it would "think" it was knocking for some reason.

 

guys what do you call spool-up area, cells from vacuum till positive pressure (100 load) or till peak load ? or from 100 load till peak load ?