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ImPrOvIsE

By ImPrOvIsE,
in Western Australia

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ImPrOvIsE Collaborator

ImPrOvIsE

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Hi all. When I was driving around yesterday in the hot weather there was this pinging/rattling type noise coming from the motor when I was flooring it. Its never really done this before and I was wondering is this what "knocking" is? Is this caused by hot weather? I have an SAFCII but the knock has always remained on 0 which leads me to think I have not wired this part correctly.

Also, my brakes seem to be wearing thin. What is the part number for just the standard run of the mill brake pads or where can i get them from.

Thanks all

Andrew

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rob77 Veteran

rob77

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Without going for a drive with you its hard to say 100%, but I'd be pretty sure the engines detonating. Its sounds like marbles rattling around or a loose screw rattling around. I would say with the extra heat, the safc2 leaning the fuel mixture out and using a stock intercooler the car's detonating. Basic fix dont thrash the car in the heat or richen up the fuel mix.

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ImPrOvIsE Collaborator

ImPrOvIsE

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yeh thats what the sound was like. I had been driving reasonably hard for a while in the heat. Guess it twas just the hot weather. The car was normal again this morning.

THis might sound stupid but detonation is knocking right?

Good place for purchasing brake pads for R33?

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caminperth Grand Master

caminperth

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Yup - detonation = knocking... detonation is NOT your friend. It is not a GOOD THING (*TM). If you hear this noise you should stop accelerating immediately. Detonation causes all sorts of problems, to mention a few - blown plugs, broken ring lands, melted pistons, burned out exhaust valves etc....

Brakes pads for an R33 - talk to Perth Brake Parts. Use Bendix Ultimate - nothing less or you will be dissapointed.

This has been a community announcement fuelled by red wine - not to say that the information is inaccurate, cause I know through experience on both counts that I'm correct! I hope it has been helpful. :D

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GTS-t VSPEC Grand Master

GTS-t VSPEC

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Hi Andrew, I was sure we hooked up the knock sensor correctly, but I guess we never checked to see if there was any output. Definately sounds like knocking, most likely cause by heat soak into the intercooler, with the intake temps rising causing the pinging.

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caminperth Grand Master

caminperth

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Bendix ultimate $70  :(

Woah! Where are you getting them at that price? Maybe they're cheaper for an R31? 1st set I bought were round $120 from Perth Brake Parts. Second set I got for a shade under $100 through a mate's work account at Coventrys.

BTW - just put on a set of DBA slotted rotors. Made a HUGE difference! :)

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