absolutely! You can NOT just turn it off, especially if you have been tuned w/ it on! You need to make adjustments to the fuel map, when turning LS off! I would start by leaning out the map AFTER peak load/boost by a few points @ a time. From say 200 -300 load/ 3500 on... till you get it back to ~ mid 11's... Most likely gonna need to adjust spool up area too...

another thing you can do, is re-enable it, and extend it to your rev limiter... But we all know about LS (if its not set up correctly)

 

ya i figured. my fuel map has a huge dent in it from 220 load to 360. a dent full of 9.5's.... im guessing this is because lean spool was turned on? its in the 4000-4500 rpm range..

 

^^^ Your 2.3L is going to make more noise on the knock sensor than your stock block, especially at those low RPM tip-ins. Mine does for sure. You'll need to adjust knock control at low RPM for that.

You need to get your AFR's tuned, there is no reason to be making pulls that rich. Get that thing at 11.7-12.0 (for E85) during WOT. Then worry about the other stuff.

 

ya i will. how important is smoothness on a fuel map? as important as on the timing map? this fuel map i have to work with is really jaggy and blocked.

 

What is important for the fuel map is that it creates a smooth AFR log! Use the values that get you a nice set of logged AFRs.

 

ok........ im confused with this map tracing crap. If i edit my log to only show 100 TPS and look at where the wideband reads 10 AFR those are the cells i want to increase and the surrounding ones a bit as well?

heres what my map looks like from 200 to 360



why are my numbers so much higher then yours on your fuel map?
do cars really change that drastically?

 

Ok so Ive maybe done 8 pulls and 4 incremental changes to my fuel map to get what I have here.

It could use a little more work to get it perfect but Its certainly more like 12.5 ish during spool and then 11.5 tapering down to 11 at 7k. Before I do much more Id like to recalibrate my WBO2 properly to be sure what im reading is correct.


I have the "average" selected. But what is this really doing taking data points in a range averaging them and then putting them into a cell? Is that a good way to make changes to achieve a proper flat fuel line?

Ive graphed the AFR in excel against RPM to see the line. Ive also posted the raw log files. Thoughts? Am i headed in the right direction? Is this too rich? My car is already a gas hog...


sorry to put this in the middle of your discussion Tom.

-Ethan

 

no problem. looks good to me.

 

Injector scaling plays a massive role in the AFR's effective value based on the map. No two cars will use the same map AFR values once you use bigger injectors and scale them for your specific fuel trims.

 

Amazing how this thread became "tuning 101".

I love to see people try DIY.

 

i already scaled the injectors. the trims are all +3, 0, 0

I dont trust my aem wideband, so im taking it to david buschur. Hopefully i can crack 520+ on his dyno. after I confirm my wideband is good, then i can play with the tune when time comes. I plan on switching to sd in end of april anyways.

 

ya... well im going to stop for now and give it to david lol. my aem wideband gives me a wierd feeling, and i dont want to damage my motor over a $300 gauge. and i feel ill have trouble getting rid of this low rpm knock issue, where as someone like David will be able to get rid of it within 1-2 pulls, so im going to let him do it instead. I fail i guess

 

DIY... if all else fails take it to Buschur??? FTW???

 

Ok ive been working on my tune for a bit today and have some questions about maptracer and the 2byte load and rpm values.

How does the maptracer deal with the load spikes? this is what my load looks like on a recent pull. Sometimes I get spikes sometimes and other times I dont. See below
.


So when map tracer is looking at the log file how does it deal with these spikes to properly plot on the timing and fuel maps?

Also what are you guys using for "data values" Its set on average as default it seems. Is it averaging all of the values and plotting ceratin areas? That doesnt seem to be an accurate way to tune...? Especially when plotting knock sum counts. Take a look at the screen shot below. You can see where the tracer has plotted knock counts on 4 different cells. I have 4 different lines in my log that have knock They are all plotted correctly but where did this 0.5 count come from? Ive highlighted the cell in question and its corresponding line in the excel sheet.



Once in a while when i stop the logger it puts some rabdom number for all the values on the last line. Something like 13.23564. If the tracer really averges values then this will greatly effect a small value like 1 count of knock. Is this a glitch in EvoScan? See Below

 

ur load spike is 320 ish... your maptracer wont show it untill you rescale... for 320 load.. but i cant see it on you log... weird.. is that the same log as displayed on maptracer and the exel chart?