Higher RPM Knock

Discussion of tuning specific to CX-7 vehicles
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Posts: 6
Joined: November 29th, 2015, 11:53 pm

Higher RPM Knock

Post by GRemezov »

Gents, need your help!
Cannot understand the knock at high rpm, tried to fight with it by increasing fuel to 10.5 and decreasing timing to 6 deg, still there :banghead . Would really appreciate your help and opinion.
Logs and current tune attached hereto.
GRemezov S2.1 v1.01.vtune.zip
(92.05 KiB) Downloaded 443 times
(17.24 KiB) Downloaded 404 times
Logs CSV.zip
(4.92 KiB) Downloaded 428 times
CX-7 Gen1 (USA Spec.)
Corksport TMIC, Autotech HPFP internals, Test Pipe, NGK LTR7IX-11, TD05H-18G, 3-port solenoid, 3Bar MAP.
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Posts: 1327
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: Higher RPM Knock

Post by mituc »

Give it less VVT above 5000rpm. Actually from 5500 up zero it.
Also when you take your logs change the units on the dashboard to something with better granularity than just BAR. kPa would work pretty well, also 1BAR=100kPa so it's easy for the metric system guys to make the conversion.
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~509BHP @34PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 330-ish BHP
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