knock low load

Tuning discussion for all second generation Mazda 2.3 MZR DISI Turbo powered vehicles
Post Reply
Edain
Posts: 12
Joined: November 27th, 2024, 1:31 pm

knock low load

Post by Edain »

Hi team.

I have the following question.
Analyzing my car's engine logs, I see a knock of 8.0 at low load. For example, if I shift from 3rd to 4th at 2300k RPM, the knock increases for a moment. At high load, the knock doesn't increase; it stays at 0.79. I want to know what's happening. Maybe it's a false knock. I should clarify that the knock doesn't increase at all at high load. I'm sharing my log and tune details.

My car's specs:
- HPFP updated.
-CPE CAI
- ETS big intercooler.
-Downpipe anda catback 3in
- LTR7IX-11 spark plugs.
- Smoke vacuum test: Pass.

Thanks!
Attachments
93US_98EU Octane High Load + CPE CAI + Corksport Race Pipe v1.06.vtune
(96.89 KiB) Downloaded 3 times
knock.zip
(82.98 KiB) Downloaded 3 times
mituc
VersaTuner guru
Posts: 1524
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: knock low load

Post by mituc »

You may have an intake leak (I know you said you passed the smoke test but the logs show a different story), and once you fix that see if anything changes. Right now the combined fuel trims are around 12-16% and the very small boost time you had in this log shows that the leak may be before the turbo.
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~550BHP @35PSI
2008 Icy Blue Mazda CX7
Built engine and stock exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 360-ish BHP
Edain
Posts: 12
Joined: November 27th, 2024, 1:31 pm

Re: knock low load

Post by Edain »

Thanks for replying. Today I'll disassemble the entire intake system before the turbo to make sure it's properly adjusted. I'll come back and post the results. Thanks
Post Reply