Jump to content
SAU Community

Recommended Posts

Hi all.

So i know what each is, but how do i dignose it. I keep thinking i keep on hearing things in my R33.

How does one tell if the engine is knocking or pinging. I have fitted an SAFC II and i hardly get any knock maybe up to 15 or so. The car pulls HARD and EAVEN all the time, but somethimes i swear to god i am hearing something like knocking or pinging, but the car does not stumble or anything, no missing, no smike nothing. ( hard to tell with 3.5' exhaust and HKS pod)

So how does one tell by ear if anything is happening. What noises can you tell from, and symptoms.

ALSO how do i check timming, i have a series 1.5 so a series 2 ignitor on coil, no idea how to connect things up.

What are the timing setting suppose to be at idel ect????

HELP ME FROM GOING INSANE

Edited by WogsRus
Link to comment
https://www.sau.com.au/forums/topic/134153-knocking-and-pinging/
Share on other sites

Knocking and pinging is generally caused by improper combustion in your engine, called "auto-ignition."

An internal combustion engine runs properly when the spark-initiated combustion wave expands rapidly but smoothly across the combustion chamber.

If the gasoline-air mixture auto-ignites somewhere in the cylinder (other than at the spark plug) just after spark ignition, the auto-ignition combustion wave can interact with the spark-initiated combustion wave, causing the vibration we hear as a knock or ping.

Increasing engine load, temperature, compression, spark-advance, air-fuel ratio, combustion chamber deposits, and decreasing altitude all increase the tendency for an engine to knock. :(

if your car is pinging/knocking its not good. Its something you should get checked out man. the human ear cannot hear about the first 10% of the sound that is made so if you can hear it over the exhaust pod than its pretty bad. If you got a Power FC I think there's a function where you can make it flash the engine light when its pinging/knocking???? Good luck man.

well the car is runnign stock boost and intercooler but new pod and exhaust, i am not saying my car does knock or ping, i simply WANT TO KNOW what they sound like and how to pick it ip if it does do it.

SO SOMONE tell me please.

I know what they are and what happens to the engine when it goes wrong, but HOW do it pick it up by ear.

THANKS.

BTW My safc II has a knock setting, it never goes higher then 15 or so.

Edited by WogsRus

If u can hear it pinging will sound like a box of matches ratling in the background very faint, then sever knocking is basically that, like a cylinder went knock on the side, well thats my interpretation. I drove around for 2 days wihtthe pining box of matches sound and it was real quiet so i thought it wasnt to big a deal to be urgent and then i busted a piston. ended up buying a new engine. Get it checked if your in doubt by a good workshop.

Thats my point, i have a 3.5" ehayst and a HKS pod with bellmoth intake, and at 4000rpm, no idea what is what, everything makes noise.

I have a timing light now and will check the timing this weekend.

Will pinging be notice by performance, ie losst or a miss or something

Listen to a loaded up mitsubishi express van go past in a gear too low for it. That's pinging. It's a metallic kind of rattling. I can hear it in my car but my exhaust isn't that loud and I don't have a pod. It's easier to hear with the windows up.

It's the kind of sound that someone needs to point out to you. Once you know it you know it. Hard to describe otherwise.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
    • Legend. I ended up finding the facebook account of the owner of the first car i sent but sadly he deactivated the account. I think you’re right in saying it’s some sort of well done custom job. Really appreciate your help anyways.
    • Totally equivalent. Stock often goes from the comp cover because that's where the actuator is also installed and the factory needs 2" of hose to make the connection - and it comes as a pre-assembled unit. They totally have a boost reference from somewhere between the turbo and the throttle(s). Oh, jeez. Just do it in M12 then. We don't actually care that much. I would expect any such AN converter fitting to rely on an o-ring or some other seal onto a flat surface under the flange of the hex**, because bolt threads are no intended to provide a pressure seal. unlike..... pipe threads. **which also requires a suitably flat and smooth surface on the turbo's boss to provide the seal.
    • I also used NP   That’s were it’s seems to be the best place to fit it? All schematic shows also that it’s should be referenced from the turbo housing. But idk, I do see high hp cars without any connection or anything to their turbos, so I really don’t know how they connect their things
    • I do have loctite 243 and 246 and a few more models. I could drill it now in place and make new threads for m12 and order an4 - m12 coupling and fit that to the turbo. Run a braided hose to the EBC which I could get a an4 to 1/8npt 
×
×
  • Create New...