first log with 550s installed, guideance welcome

[magik95]

I put my PTE 550s in a few weeks back and now just started to really trying to tune them with my safc. so heres the first log at 15psi.

Third gear pull started at about 25k.

rpm timing air flow lb/min
2500 28* 4.26
2804 25* 5.74
3019 23* 6.89
3070 23* 7.26
3136 21* 7.89
3210 20* 8.26
3335 17* 9.46
3457 13* 10.99
3492 11* 12.66
3660 10* 13.42
3828 8* 15.63
3957 0* 19.09
4140 3* 20.44
4292 4* 21.46
4664 5* 22.12
4734 4* 22.98
4781 4* 23.25
4843 4* 23.13
4941 4* 23.10
4968 5* 23.03
5015 5* 23.42
5167 6* 23.21
5207 6* 23.47
5351 7* 23.22
5437 8* 23.30
5531 9* 23.61
5601 11* 23.46
5750 12* 23.46
5785 11* 23.47
5972 13* 23.45
6074 15* 23.69
6183 15* 23.25
6250 15* 23.25
6367 16* 23.24
6492 16* 23.83
6515 17* 23.52
6585 18* 23.88
6738 19* 23.92
6761 21* 23.63
6957 21* 23.48

 

[Gstclipse69]

Well from the timing values gradually going up it doesnt look like you are knocking anywhere which is good. Imo the timing looks a bit high but you are getting away with it now. Granted you have a safc so there isnt anyway to change your timing. Do you have a wideband? What is your afr?

Looks good all in all. You're not knocking. Up the boost a bit at a time. Make sure the afr stays around 11.0 assuming you are on pump gas. Then go from there. If you see the timing drop from the values you have now then there is some knock and you need to back of the boost or adjust the afr.

 

[magik95]

I dont have a wide band yet so I dont know the afrs. So do you think I could lean it out a tad based on the log or should I just leave it alone and mess with the boost and see what canges? With the same settings should I log the o2 voltage to some what see what the afr are?

 

[Gstclipse69]

I am not going to tell you to tune off of the stock narrowband o2 sensor, so take this with a grain of salt. At this point you dont have a wideband so you dont have any inkling what the afr is. I cant tell you to lean it out at this point either because I have no idea where the afr is at.

So; if I were in your boat, I would log the narrowband voltage and see where it is at. In my experience if your gas afr is around 11.0 then your stock narrowband sensor should read some where around .94-.96. If its below that then richen it up. If its higher than that, lean it out a tad. Since your timing values didnt drop any, you are probably somewhere near where you need to be or richer. This is assuming you have a good working o2 sensor as well. Once you get the voltage in good order then proceed to up the boost a bit at a time.

 

[magik95]

Ok thank you. I was going to log the o2 values but didnt know if that would make the log less accurate with logging the other values as well.