So I'm just getting started tuning my new motor/setup. The details of it are in my signature. I'm looking for input from others running strokers, bigger turbos, largely rescaled load axises etc.

I'm on 94 octane right now and looking to finalize the tune for a track day this weekend - road racing, not drag racing. After that I'm switching over to dual mapping and E85. Boost is set at 24 psi via a manual boost controller.

The motor was a false knocker after the build. I've used the knock control maps to eliminate that, but I'm trying to set the values (for eliminating false knock) right at the limit so I don't hide any real knock. I'm seeing a little knock right now, and from audio files of the motor it's false.

SO, I've got my A/F's doing OK, spooling around mid 12's and dropping into mid 11's with a slight taper. I've got the map kinda blocked out above 200 load, and it seems to work well - anyone have comments about blocking the fuel map like that? Also, what are people running for values in the non-WOT areas of the map, I'm kinda shooting in the dark in those areas.

Timing is really low right now as I was trying to see if it would get rid of the knock - which it hasn't. I'm at 0 degrees at peak torque, and around 10/11 at redline (7500). I'll be trying to bump that up and see what I can do. But what about the rest of the map? What are people doing in the areas of the map not traced by a WOT pull. Again I just have values loosely based on stock in the other areas. Does anyone have some knowledge they can share about correctly tuning in the other areas.

Here are my maps from this morning, and the log to go with it.

 

Have you ever hit 360 load? It seems like your mid RPM timing at high load is way low- at least compared to mine it is. Your timing is also low compared to mine in part throttle/cruise areas. I know I have a different setup, but I can't imagine that those basic areas would change that much from setup to setup. At 100 load at 2k I'm running 18 degrees of timing where you are only running 10. I could be way off here, but that's my opinion. My car drives like stock- which is a very nice feeling- when just cruising around. Your setup, which is quite admirable, should do the same. I think the timing would need the biggest adjustment. But then again, I'm just a novice when it comes to this stuff compared to some people. It also seems like it would be hard to tune the part throttle and cruise because of the load difference in the low range because the gap is larger than stock.

 

The timing is super low because I'm trying to validate the knock I see as false, and it's an artifact of my start-up map being ultra conservative.

So I'm trying to get some legitimate timing in the WOT pull cells, and then bring the other areas back up and smooth.

I added 3-4 degrees at peak torque and redline, and in DLL went to 414 ft-lb peak torque and 460 whp. But there is still some knock. I'm going to lower the timing back down, maybe -1 degree peak torque and then go back to tuning the knock control to get rid of the false knock.

 

I there, a couple of questions.

How much knock is showing when you think its false knock?

What gas are you using?

Blocking your fuel map is fine. Mine is blocked (mostly vertically) and I have very stable afrs throughout the rpm/load range. The engine VE doesnt change dramatically between each load point hence the reason you have ended up with it blocky.
You may want to try to be a little richer at peak torque than you are to see if the engine likes it more. As very small knock counts at peak torque can often continue on up the rpm range even though the timing in those areas are "ok" I personally always treat random knock 1-3 counts at peak torque with more concern than higher in the rpm range, because of this.
I hate ANY knock at peak torque, random or otherwise.

Your Timing map looks fine- one thing ive noticed is the lack of timing in offboost low rpm (2000-3000) This may be a legacy of you tracing false knock.
At your current boost level and based off 93oct, 3-4 more degrees more on the map you have above would be a middle ground of "normal" for that turbo/engine. If your engine can take more- thats great!

 

I know there are lots of you out there.... anyone else with tips and comments.

 

I wouldn't think you would need the fuel map that rich at only 100 load. Do you still have the lean spool junk enabled?

 

I have lean spool disabled with address 1680 and 1684 both set to 1500 on the 94170015 ROM, I believe that is correct...

 

those addresses are correct. as long as your afr's are stable (which they look like they are) then your fuel map will be fine.

As you already know your timing is very low in pretty much all areas of the map.

 

I have noticed that my 2.3 on pump 91 was VERY prone to knocking at peak torque with much of any timing advance. I have read somewhere before that the 2.3's don't happen to like a lot of ignition advance on regular gas. I don't know if that is really a relevant statement though. Once you switch to e85, you will be able to ramp up the timing significantly before encountering knock.

 

yeah in general some engines just dont like timing. It looks like you are only seeing 2 counts of knock. That isn't bad at all. How much do you get when you bump up the timing? if it is a drastic difference you are probably running sufficient timing.

Have you tried turning the boost up a bit? I would aim for 3-4 more lbs on pump on that turbo.

That thing looks like a monster mid to high end. Must be great on the track!