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How Reliable Is The Knock Sensor?

SargeRX8

By SargeRX8,
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SargeRX8 Grand Master

SargeRX8

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Ive got a relatively standard R33 GTST. Only has a cat back HKS exhaust, pod, BOV, FMIC. Stock boost yada yada. Anyway I installed a PowerFC, let it learn my car. Its got nothing but base tune.

Checking knock, I see it averaging at about, well 0 when cruising around. Abit of a push it goes to about 15. If I gun it, it shoots between 40 - 80. If I hold it, I can see massive readings like 134 - 150...

My engine should explode.... Should I be worried? Is it unsafe running the PFC as a full time ECU with no tune? From what Ive read it should be running like stock but more optimized...

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SargeRX8 Grand Master

SargeRX8

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It is an atmospheric BOV, an apexi. Could the frequency of the sound from the BOV trip the sensor? I cant keep my eyes on the hand controller, I just drive and finish then check my max readings before I switch the car off. A idle rev all the way to 5000rpm gives me knock of 5, sometimes more sometimes less. Its very inconsistent..

I really dont feel it worth the money on turning a stock car :( I guess ill return back to stock ECU.

mad082 Grand Master

mad082

Posted
Posted

over the stock ecu you would recieve an increase of 10kw or so just from a tune on a stock car. if you were running higher boost the power gains would be closer to 20kw from a tune over a stock ecu (and a boost increase + tune would yeild about 30 or 40kw over the stock ecu and stock boost).

the power gains from running an untuned PFC on a stock car would be minimal, if any. you may actually see a decrease in power.

89CAL Grand Master

89CAL

Posted
Posted

a month isnt long to wait. Id do as you said and put the stock ECU in until youve got everythng else done. As youve just pointed out, now point forking out twice for a tune within the space of a month or so

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