! if your already decreasing slope is decreasing , vs if your decreasing slope is increasing.. the former is typically 100- peak load does. Starts steeper then slows down decreasing.. concepts compare eaily to derrivitaves imho. random and easily enough to confuse anyone, maybe somone can reword that trend so that it makes more sense?

I actually took 1* out at 160, 2 @ 180, 2 @ 200, and 1@ 220 on my map. Gave it a slight sag there. Was getting a bit of part throttle knock... 200 is about 9 psi on my car. 270 is about 22

seemed very clean tonight, still tweaking some of the VE in on my car, I run her 13.5-14 at 0-5 psi. at some RPM its 13.5 quicker than others, SD is stilll giving me some heart burn, but Im verry verry close.


I am starting to see that your first 0-15ish psi of boost takes a good decrease in timing, then gradually the rate of decrease in timing, is slowing down.

My next theory is that for a given airflow/boost level, you have a RPM at which that is achieved earliest. At that point you can start to ramp timing up from there. so a line drawn from 0 rpm,100 load, to peak RPM and Peak load is kind of the trend line. more emphasised in boost.

 

Thanks for the comments guys, I appreciate it.

Re: ReaperX
- Gonna smooth that out and Ill check on the VD stuff. It was long stretch of flat road and some areas are better then others. This just happened to be my last run before the battery died on the pc.

Re: domyz
- I look forward to trying a little more timing up top. I didn't relies i had that much more room to play with it. Obviously another 2* of timing in the mid range and i start seeing knock and 1* didn't show any increase in power so i was happy where it is but i'm definitely gonna go back and fix that ramp up curve i missed and see how it likes it. Your illustration really puts it in perspective.

Re: 211ratsbud
- I have never liked the 11000 scale and that's just one really good reason to get rid of it, thanks.

Re: evo8426
- The tune is meant to be a little on the aggressive side and the car does seem to like the timing but i am gonna try and curve it better and see where that puts me. I was running an 11.5 on 93oct because the car liked it so i kind of just went to the leaner side of e85 as well. I definitely planed to try a few afr's and see what was working best but just haven't gotten around to it yet. I also didn't relies there was an update out for VD so ill grab that now and i apologize for removing the numbers but people tend to get distracted when you post the numbers and i wanted to avoid any of that. Also thanks for the scaling, ill give that a try.



Edit & QU: After a little bit of review i have a question... In the area of 270 load vertically it reads 6678766778 top to bottom. Now look at rpm 5250-5500 horizontally and you'll see a strip of lower timing of 6's. This tune was done with boost by gear progression so the lower loads (250 for instance) are not merely a manor of smoothing but actually tuned and the segments in between smoothed in. This strip is present ac-crossed the tune and was also in my 93oct tune. The motor WANTS less timing here and i"m not sure why. Could it be related to the custom Mivec map? I do hit knock at a lower timing then the surrounding cells and the power curve seems to follow the same effects. At this point a picture of the Mivec map would be helpful but i cant load that up at this moment, sorry. Its this one strip that really throws the map out of wack.

 

For the sake of keeping the motor intact do not tune E85 based on knock which it sounds like you are doing. E85 will keep taking timing and will become very dangerous if you continue tuning with the knock method.

Also there is no benefit in running E85 leaner than 12.0 because leaner than that can cause to car to start acting like it is hitting fuel cut. I run 11.5-11.6 on 93 but I run 11.8-12.1 on E85.

 

Its not tuned to knock but I do know where the knock is. And I definitely am gonna try to richen up the afr and see what it does.

I still have some more playing around to do... I've only had a night and a half to build what I got so come this weekend ill be able to put the finishing touches too it and thanks to some comments a few things to try out.

The strip at 5250-5500 rpm still has me a little curious though.

 

Hello, maybe this is the right thread to post. I've been battling with knocks for awhile. Back in Jan, I logged knocks as high as 12 while under load. Since then, I changed plug wires and to copper plugs gapped at .22 and reduced by half 1-6 counts. Recently, I upgraded my fuel pump/injectors and tried scale it best I can . I did some 3 pulls back2back, and now highest knock is 4. Just conversing with a respectable tuner, he believes I'm almost there. So I wanted to see if I can do this myself before going to the tuner. LOoking at my map, do I need to just reduce timing in knock cells and "smooth out" the surrounding areas? From my logs, anything I need to do AFR, etc?

Running 91 Oct with10 ethanol blend
mods are:
no name upper/lower ICP
KN cone filter kit
APS Bov
no name intercooler
FIC 1050
DW300
Buchur TB with gutter cat
Greddy Profec B Spec 2 set for 18-19ish PSI

Thanks!

 

Way too high timing at peak load!!! Try 2* at 3250 and 3500 and 11* up top. What are your AFR readings?

 

thats an interestingly high amount of timing to be running on 91.

 

True

Funny thing was a local tuner suggested I run that high on 91 too. Blew a HG.

 

Holy Shxx!!! ok, I'll try to work on it tonight and post it up. If it seems I'm clueless, please let me know and I go to reputable tuner. BTW the tuner who gave me advice didn't have my maps or logs...just based it of our conversation. I'm know I would've gave my logs, he would've said the same !

Which load should I start/end with the 2's and 11's?

BTW my logs should have AFR. If you guys wouldn't mind checking it so I don't blow something up!

 

my 93 oct s2 cams map, also an IX

 

If you dont mind me asking but whats your boost like? Peak-tapering?

 

310 load 3500 260ish load 7k

19 creeping to 22 or more weather considered

 

Looks good!!! You've got a slight dip at 3750 300 load.

 

tuned for first(second too) gear needs that ..

My hta 71 is beginning to fail aswell. theres a fair amount of axial shaft play.

 

Ok looks good!