Datalog analysis - does this look normal?

[D4T]

Hi all,

Just wanted to check something as I just took a couple of datalogs from my car and I'm not sure I'm happy with how the log looks but could do with some other opinions.

I wasn't concerned with how the car was running at all until I did some logging and looked more carefully at some old datalogs I had saved.

Essentially though to me it looks like it's pulling lots of timing across all cylinders - I don't think this is "normal" is it?

I've also noticed it pull timing at idle (only like -0.5 to 1 degree) which seems weird and some knock events detected when I'm off the throttle. I assume that any knock events aren't normal or are some to expected here and there due to noisy engines?

Datazap link

Thank in advance,

D4T

[fstm5]

Originally Posted by D4T

Hi all,

Just wanted to check something as I just took a couple of datalogs from my car and I'm not sure I'm happy with how the log looks but could do with some other opinions.

I wasn't concerned with how the car was running at all until I did some logging and looked more carefully at some old datalogs I had saved.

Essentially though to me it looks like it's pulling lots of timing across all cylinders - I don't think this is "normal" is it?

I've also noticed it pull timing at idle (only like -0.5 to 1 degree) which seems weird and some knock events detected when I'm off the throttle. I assume that any knock events aren't normal or are some to expected here and there due to noisy engines?

Datazap link

Thank in advance,

D4T

Need more info, tune, fuel type etc

Only pay attention to knock if it’s pulling timing, or else it’s most likely false knock

[D4T]

I’m running the Stage 1 91 octane BM3 tune on UK 99 RON fuel as I wanted to leave some headway. The car made 699bhp on a local dyno and as I said I’ve never been that concerned until I noticed lots of timing pull.

[fstm5]

Originally Posted by D4T

I’m running the Stage 1 91 octane BM3 tune on UK 99 RON fuel as I wanted to leave some headway. The car made 699bhp on a local dyno and as I said I’ve never been that concerned until I noticed lots of timing pull.

I’m no professional but your timing seems ok, a few degrees here and there from my understsnd isn’t really an issue as there’s a lot of reasons why timing can be pulled, fuel etc. I don’t see any knock but again it’s difficult to look at the log on an iPhone. Timing is great only in some RPMS it’s being pulled.