Hey everyone i have a evo 9 ssl and been "self tuning" for 3 years now but never really got it. at first i did lots of reading but it all did not click until recently. i have more time to sit and actually tune the car than i did before and was hoping to see if i can improve some areas to get the most of my setup. i have full bolt-on 3 inch turbo back exhaust stock exhaust manifold, hallman mbc set to 25 psi peak taper to 19. 264 greddy easy cams and aluminum radiator (because my stock started leaking). here are the logs, maps, and dyno results. you will see an increase from the first log and im not sure if what i have is great for 91 octane. i also would like to improve my mpg from 19 to anything higher haha. i tried doing the open loop setup when i first started tuning however when i flashed it, i got really lean numbers when i hit the load and tps numbers that were set. like 16:1 and quickly heading to 19:1. it would fluctuate way too much so i stopped with it. Thank you in advance for your input.

 

Anyone?

 

What do you guys think of 8* at 7K? i am looking at other posts and it seems like people are running much higher than 8 but i seem to be knocking if i go higher. is this right for the load i am in (210-220)?

 

The 9 does not like near as much timing as the 8 does. I get down to 0 on my car on the top.

 

Wow and I thought I was low. Do you think that there is more power in a lower boost level or do you think I've peaked it's performance?

 

You don't need timing near 0 well past peak torque. I could see getting down close to 0 at peak torque but no way that should be necessary after that.

Drop your timing a few degrees where you're getting knock and see if the knock goes away. If it does then you found a safe point for your tune. If not mix in 110 or something if it's available to you to see if the knock remains. If you're still getting knock with the high octane and low timing then you probably have something loose in your engine bay causing false knock.

 

I have fixed all of my knock issues. I dont get more than 2 counts now and that is at random pulls so i think it could be the road causing false knock. i have also lowered my fuel to be a little more conservative for weather fluctuations. so far i am happy i just need to smooth out the map now. i am now working on getting cruise set up in open loop. yesterday i was in 16.9 at cruise and i know thats really lean. this morning i got it set to no more than 16.2. my map has the cruise loads set to 15.2 value but the afr fluctuates a lot from 15.1 to 16.2. Do you think lean spool could be causing this change when the values are the same?

 

From looking at your AFR graph, you need to fix that spike at 6800 rpm. I would also run slightly leaner at spool up too. I usually target 12.1 at spool up and then richen it up from there. You're timing map could be a bit more smoother when transitioning into the 80+ load columns as well.

your spike is probably from 200-210 load where those 11s are. It's not smooth on the fuel map so it's causing that spike.

I am no expert though, but after a lot of reading and testing like yourself I've learned a decent amount.

 

Yeah I have tried fixing that spike and dip around the 6800-7200 rpm. i noticed my lean spool starts at 2k-7k so i thought maybe that is why there is such a huge gap in numbers. if i got it close to 10's it would get extremely rich. ill get a updated run today after work.

 

I would personally disable lean spool entirely. I'm really not a fan of it.

 

i will do 2 tests runs today, one with lean spool enabled and one disabled to see the change and i will go from there.

 

BTW thanks to both of you who replied to this thread.

 

I don't like using lean spool either. Unless you're using 3D Speed Density and tune every cell in the VE Table you won't be able to just put the same value in an entire group of cells in your fuel map and get that AFR.

Even with a very obsessively tuned 3D SD map it still won't be perfect. I spent a ridiculous amount of time causing around tuning mine.

To keep the same 15.2 or whatever AFR in the entire group of cells your fuel map will need smoothed out instead of just having a block of cells with values of 15.2. Very light throttle low load is something to be careful not to forget to tune also. Drive in 2nd or 3rd or whatever up to mid - high RPMs and give just the slightest amount of throttle and try to hold steady to get good data. Using up and down inclines can help hold steady at a certain RPM and load also.

 

Definitely let me know the results!

 

Omg. So the lean spool tune worked great and followed the curve. Lean spool disabled went super rich haha. I'll post up the map, graph and log when I get back to the office. I will try to retune with lean spool disabled. The 7k up looked great. I may need to take off a degree at spool up to completely rid of knock but there's no more than 2 counts that I could initially see. I haven't looked at the logs yet.

As for a new adventure, I have been working on open loop for cruising. It seems like I get super lean when I hit the threshold till I reach 3k and then it jumps to 15.5. I've been trying to catch it on evoscan while driving to see if maybe it's a load issue but I keep my foot steady and see it jump back and forth from 16.5 to 15.2 so I'm trying to figure out what is causing that as well.