Results from evo cam install & alky

[Goat Blower]

IDC of 93% could be part of it. You're almost holding the injectors wide open continuously, which can cause a funky spray pattern. You could also add a couple of gallons of E85 to a full tank and see if that clears it up, if it does, the injector DC is not the problem.

[niterydr]

To bad the airflow hz signal pins at 1603.95 hz at around 5156rpm, it would be nice to see how much higher it goes when the computer starts to advance 10 degrees of ignition timing.

[scheides]

Yea, from what I understand that is a bug in the logging software, 1603.95 hz is the max it will read for some reason. The MAF itself will read much higher than that, unlike the 1G MAS which maxes out around there :D Apparently in an upcoming release that will be fixed.

[FattyBoomBatty]

What logger are you using?

[scheides]

EvoScan v.97

[Shane@DBPerformance]

The 1G and 2G have the same 1600hz logging problem due to the hz only being a single byte 8-bit value. The trick done on the 1Gs to get high hz logging was to change the code in the ECU to divided the outputed Hz value in half before putting it to the datastream and then running a modified logger like MMcd that knew to multiple the value by 2 before displaying it. That trick upped the logging limit to 3200hz.

I can tell you how to remove the boost cut limiter or raise it up, if you want to. I put it at that level on purpose incase of overboost. If you airflow gets much higher though, then the boost cut won't be of any use. Eventually you outflow the max value even allowed for the boost cut table.

You could try pulling some timing out or richening it up in the are where it knocks, but you really don't seem to be getting a huge benefit from the alky. And up top where it is running plenty of timing, it wasn't knocking much at all in that log.

[scheides]

So on some advice I tweaked the controls of the progressive controller. It was set to come on at 10psi and max flow at 20psi. I changed these to 7/15 respectively, and it did help a little bit.

So I moved it down to about 7/15 and at 25psi knock is almost eliminated. However, as soon as I bump it up to 26psi, things get a bit unstable, though not as bad as before. One run will be clean, 0 knock all the way through, the next will be knocking up to 6-8 counts. Here's a log from a clean run:

RPM O2 TPS KnockCt TimingAdv
2031.25 0.897 81.96078431 0 16
2125 0.9165 100 0 15
2218.75 0.936 100 0 13
2312.5 0.936 100 2 11
2375 0.936 100 2 11
2500 0.936 100 2 9
2593.75 0.936 100 1 9
2718.75 0.936 100 2 8
2843.75 0.936 100 2 6
2968.75 0.936 100 1 4
3093.75 0.936 100 1 2
3281.25 0.936 100 1 -1
3468.75 0.936 100 1 -2
3656.25 0.936 100 3 -1
3812.5 0.936 100 3 1
3968.75 0.936 100 3 0
4250 0.936 100 2 2
4406.25 0.936 100 1 2
4593.75 0.936 100 0 3
5000 0.936 100 0 3
4968.75 0.936 100 0 4
5218.75 0.936 100 0 5
5437.5 0.936 100 0 5
5625 0.936 100 0 6
5812.5 0.936 100 0 8
5968.75 0.936 100 0 9
6156.25 0.936 100 0 10
6343.75 0.936 100 0 12
6500 0.936 100 0 12
6656.25 0.936 100 0 13
6812.5 0.936 100 0 14
6968.75 0.936 89.41176471 0 19



And here's a log from a not-so-clean run. I can feel the car down on power (these are 4-th gear pulls) from knocking a bit, but how bad is this?

RPM O2 TPS KnockCt TimingAdv
3562.5 0.897 100 0 0
3656.25 0.9165 100 4 -3
3718.75 0.9165 100 7 -4
3875 0.897 100 7 -3
3937.5 0.897 100 7 -3
4000 0.897 100 7 -3
4125 0.9165 100 7 -3
4218.75 0.9165 100 6 -1
4312.5 0.9165 100 6 -1
4468.75 0.9165 100 6 -1
4531.25 0.9165 100 5 -1
4593.75 0.9165 100 5 -1
4718.75 0.9165 100 5 0
4812.5 0.9165 100 5 0
4906.25 0.9165 100 4 1
5031.25 0.9165 100 5 0
5125 0.9165 100 5 0
5187.5 0.9165 100 4 1
5281.25 0.9165 100 4 1
5406.25 0.9165 100 4 2
5500 0.9165 100 3 3
5562.5 0.9165 100 3 4
5656.25 0.9165 100 3 4
5750 0.9165 100 3 5
5843.75 0.9165 100 2 5
5906.25 0.9165 100 2 6
6000 0.9165 100 2 7
6093.75 0.9165 100 2 8
6187.5 0.9165 100 1 8
6250 0.9165 100 1 8
6343.75 0.9165 100 1 8
6406.25 0.9165 100 0 10
6468.75 0.9165 100 0 11
6531.25 0.9165 100 0 11
6593.75 0.9165 100 0 12
6687.5 0.9165 100 0 13
6750 0.9165 100 0 14
6812.5 0.9165 100 0 14
6875 0.9165 100 0 15
6937.5 0.9165 100 0 15
7031.25 0.9165 100 0 15

[scheides]

Hrm, now I am confused. So *sometimes* when I'm doing logging runs like above I get 6-8 counts of knock. Now here's the interesting part. I did some more logging on my home from the office today and simply drove like I normally do. It's a mix of stoplight driving around town in 2nd 3rd and 4th gear, with plenty of 2nd gear sprints and freeway driving doing runs through the gears on on-ramps and 4th gear pulls for misc passing/fooling around. It's 18 miles from work to home, and I never saw more than 2 counts of knock.

[Halon]

Sweet, even evo's have phantom knock!