So now that my car is back out of storage the first thing on my to do list has been to fix this tune. I got this tune about 2 years ago, set up for 26psi of boost. Over winter i have added 280 cams and i want to bring the boost down to a more conservative 24psi or so. I dont expect any specific power level out of the car, i just want a safe tune that will keep everything in one piece for track days.

Tuning has been something i have always wanted to be able to do and i have some time to do it now. I have a wideband and everything ready to go. I have read as much info as i could find on how to tune but i dont know if i should start from scratch or continue from where im at. These maps dont look anything close to what most people have and even in my eyes look kind of awful

Here are the current fuel and timing maps that have been running on my car. The most i have done is brought the AFRs back to normal since they were incredibly lean around spool up and peak boost

Any tips? im a little overwhelmed by the large maps, i think i should go back to stock maps to begin with

thanks guys

 

Timing needs a fair bit of work.
Peak load timing looks like its setup for ethanol, high RPM timing looks like its setup for pump gas. Lol

Either the knock sensor is turned off or the same timing maps are in high and low.
If you are on ethanol you'll be past MBT at that boost at peak boost, if you are on pump gas you should have a lot of knock activity.

If you are dropping the boost start the map with 2-3 deg at 3500-4000, Ramping up to 10 deg by 6500 n the 230 load range, copy these across the higher ranges to get started with, smooth the lower into it. That will give you something to get started with.

 

yea there is a lot of knock. idk if you looked at the log or not. thats what i was planning on doing with the timing. How quick can the timing change from say 30-28* cruise down to 2-3* WOT?

 

I bring the timing down by a max of about 3 degrees per 10 load. So from 100-200 I'd keep changes from one load cell to the next no greater than 6.

You can also work backwards; If you want 3 degrees at peak boost (which is say 280 load), then you could have 3 at 280, 4 at 270, 5 at 260, etc, until you get to around 200, at which point you'll need to make changes of more than 1 degree at a time to maintain a smooth curve.

 

okay, that helps alot. Since im getting a bunch of knock it seems like a good idea to me if i log maybe 3K-4.5K and get the spool up area good and smooth first then move on to the higher rpms

 

Yep that's a good idea. Keeps the engine from knocking more than you need.

 

So after several reflashes and plenty of hours staring at my computer screen I think im finally starting to figure this out. Here is where im at.

Im a little confused sometimes when it comes to knowing where the knock is coming from. if you look at the log you'll see im getting a couple 1 counts and some 2s but idk why.

Let me know what else i can do to tweak this tune. I know my timing as well as AFRs should not have peaks and valleys, it should be a steady increase/decrease across and down. So yea, that needs work. It could also still use some smoothing

If you filter the data to 100% TPS i spaced out and labeled the pulls. They were 3rd, 2nd, 3rd

 

Do you have lean spool on? Looks like your trying to tune against the lean spool. I'd sugest turning off lean spool, get AFRs to 11.5 or so and then put lean spool on. Do three back to back 3rd gera pulls with no rest in between and see what AFR is like after 3rd pull. The do a 1st to 4th geatr run and check AFRs again.

 

Yea that exactly what I've been doing. I thought about turning it off but decided against it. At first my lean spool values were pretty high and the AFRs were very inconsistent. I then set them as suggested in the "tuning with LS enabled" thread. That made things better but its still been hard to get it right. Your suggestion makes sense so ill give that a shot.

But that cant be where the knock is coming from is it?

 

The knock is not that bad, you might as a test, want to drop 1 deg from the 260-320 columns across all RPMs, or add a little fuel around 3500. But if the knock never gets worse than that, you are doing pretty well. You done really want to tune for 0 knock, as the car will feel flat and unresponsive.

Try to get to a place were you can get lots of WOT in, a track is obviously perfect, but some quite ( no police ) and safe roads will do and get lots of 1-2-3 gear and 2-3-4 gear runs in to test what you have, but I think you look pretty good right now, certainly a nice base to refine as you gain experiance.