Hondata

- FlashPro Manager version 1.1.7.4
- 2009 S2000, completely stock except invidia Q300 cat-back exhaust

Could someone look at my latest data log and tell me if there is any obvious reason why my car is getting knock? It's a 2009 S2000 with only 8k on the odometer, virtually stock except the Q300 exhaust and the Flashpro. I'm using a tweaked calibration of the "Tuned" S2000 profile. This is the second time this week during a datalog that my car has recorded knock, both times it occurred during stop and go driving and mostly on cylinder #2. The attached data log only show a knock count of 3, the previous data log shows a knock count of 10. If someone could look this over and give any suggestions it would be appreciated.

What was the time frame that you got the 10 knocks?

I'll have to find that datalog when i get home from work, but it was about a 15-20 minute datalog. I think I remember seeing 2-3 knocks at the beginning then 6-7 more knocks very close together towards the end of the log.

I wouldn't worry too much about that.

Each time I've recorded knock on a datalog it's been within a cycle or two of driving after a reflash of the ECU. Could these knocks have to do with the ECU adapting to the new values from the reflash? It's only a concern for me because the car has very low mileage and I don't consider my tune/mods to be very aggressive.

Spunkster wrote:I wouldn't worry too much about that.

Wouldn't it be causing power loss because of the ignition retard?

hello,

i checked your datalog. i noticed that u r at gears 4 & 5 respectively at first and second knocks. your RPM levels are very low (just over 1,000) just before the knocks and u were stepping on gas; not WOT but a gentle press.

consequently it seems that u r at a high gear with a low RPM and cylinder 2 knocks. in my opinion this is an expected outcome.

however, the third one occurs at gear 1, the above explanation is not valid for the last knock.