Jump to content
SAU Community

Recommended Posts

Although the value at which it flashes can be set..

I used to think my knock levels were okay.. then I've seen 90% of people have lower knock readings than me ;) Time for a retune..

i think the knock on the power fc is a load of crap simply because if u go over a bump or pot hole or the road isnt the greatest --(NSW ROADS) the knock level will b all over the place. if u want to be accurate u would get an exhaust temp reading!... my 2cents worth!

i think the knock on the power fc is a load of crap simply because if u go over a bump or pot hole or the road isnt the greatest --(NSW ROADS) the knock level will b all over the place. if u want to be accurate u would get an exhaust temp reading!... my 2cents worth!

I dont think understand how the knock system works ,it's looking for more like harmonics then just bump your a knock to the car. And yes they do work very well or why would a cars like Keir wilsons retain the power fc and hand controller when his running a full metec system (knock detection).

As for knock levels well i think to many people get carried away with the levels as every car is different especially car run fordge pistons and lump cams etc

BUT just concide this that APEXI and i believe nissan don't think there a real issue to you get around 60 knocks as that is when they fire the warning light (not before all they would have set the level lower) all that said most responible tuner will normally stay below 40 or so to give a bit of head room for a bad datch of fuel and or different weather condition to the day of it,s tuning.

pete

I dont think understand how the knock system works ,it's looking for more like harmonics then just bump your a knock to the car. And yes they do work very well or why would a cars like Keir wilsons retain the power fc and hand controller when his running a full metec system (knock detection).

As for knock levels well i think to many people get carried away with the levels as every car is different especially car run fordge pistons and lump cams etc

BUT just concide this that APEXI and i believe nissan  don't think there a real issue to you get around 60 knocks as that is when they fire the warning light (not before all they would have set the level lower) all that said most responible tuner will normally stay below 40 or so to give a bit of head room for a bad datch of fuel and or different weather condition to the day of it,s tuning.

pete

okay i was thinking that knock is the knock inside the engine right as u explained the harmonics well that can change quite rapidly esp if u have hard engine mounts and suspension....is this right ...?

i looked at my knock after going over a bump in the road and it changed...? so in other words it is not an accurate reading at all since it did affect the harmonics in the engine....? and therefor it might not be reading the harmonics in the engine but actually the shock from the bump...?

something on your car is f**ked mate if bumps in the road cause a knock reading. I always monitor knock in my car and it is never affected by road conditions. never. and i will include in this burnouts, drag launches, 4 track days and a fair bit of street driving.

exhaust temp reading is really only a good measure of engine effeciency/AFR and is not as quick to react as a knock meter. they are two completely different things for completely different purposes.

something on your car is f**ked mate if bumps in the road cause a knock reading. I always monitor knock in my car and it is never affected by road conditions. never. and i will include in this burnouts, drag launches, 4 track days and a fair bit of street driving.

exhaust temp reading is really only a good measure of engine effeciency/AFR and is not as quick to react as a knock meter. they are two completely different things for completely different purposes.

ahhaaahah thats a laugh!

so u dont get any knock when going in a pot hole.....?

i find that hard to believe since the vibration is carried through the car...mmmm

but anyways each to your own and ill tell u one thing just had the engine rebuilt ...so its not f**ked!...lololol

im just saying that is not accurate the knock on the power fc.

so u dont get any knock when going in a pot hole.....?

i find that hard to believe since the vibration is carried through the car...mmmm

no i don't unless you are talking about a 3 foot deep cavern (which i can't comment on as i've never driven into one). I have been in potholes before, and a couple of times gone offline a little at turn 4 oran park (big bump there) and yes the knock reading didn't change.

I never said your engine was f**ked i said: "something on your car is f**ked" it may be gearbox problem sending a shock through the crank, or a faulty knock sensor, or knock sensor wiring, or it may just be a shit tune. but i can tell you no car i have ever been in has the knock reading affected by bumps in the road...

no i don't unless you are talking about a 3 foot deep cavern (which i can't comment on as i've never driven into one). I have been in potholes before, and a couple of times gone offline a little at turn 4 oran park (big bump there) and yes the knock reading didn't change.

I never said your engine was f**ked i said: "something on your car is f**ked" it may be gearbox problem sending a shock through the crank, or a faulty knock sensor, or knock sensor wiring, or it may just be a shit tune. but i can tell you no car i have ever been in has the knock reading affected by bumps in the road...

ok ok ok im not going to start answer this if u go over a pot hole or hit the ripple strip at the track and u feel it im sure your engine will feel it....

it may be due to my hard suspension and engine mounts and all the other siffening ..hahah

but im going to argue.

okay i was thinking that knock is the knock inside the engine right as u explained the harmonics well that can change quite rapidly esp if u have hard engine mounts and suspension....is this right ...?

i looked at my knock after going over a bump in the road and it changed...? so in other words it is not an accurate reading at all since it did affect the harmonics in the engine....? and therefor it might not be reading the harmonics in the engine but actually the shock from the bump...?

no that is not right

you need to open your eyes a little and think

If yours is doing this, dont just say the pfc is crap and the knock detection does work may you should be asking why is mine not working (because i can safety tell you that they dont all do what your does) and the knocks and haromics dont have to come from inside the motor as i have seen a exhaust touching the chasis effect knock reading before,(your could be as simple as this).

The knock detection system of the std gtr with apexi pfc is one of the single most helpfull tools in tuning the car a tuner can have(trust me i have know tuned a few).

pete

The reason I asked this question was becuase I have just added a power FC to my GTR and the tune is (out of the box) I was told that they have very advandce timimg so I did a dyno run with results of 11.5 A/F and a knocklevel of around 20.

Was told by a Melbourne PFC tuner that anything around 50 to 60 was bad.But then I was reading in PFC FAQ and it said that anything more than 10 was bad.But it sounds like 10 is a bump steer <_< so all is good B)

Thanks

no that is not right

you need to open your eyes a little and think

If yours is doing this, dont just say the pfc is crap and the knock detection does work may you should be asking why is mine not working (because i can safety tell you that they dont all do what your does) and the knocks and haromics dont have to come from inside the motor as i have seen a exhaust touching the chasis effect knock reading before,(your could be as simple as this).

The knock detection system of the std gtr with apexi pfc is one of the single most helpfull tools in tuning the car a tuner can have(trust me i have know tuned a few).

pete

i found my knock sensor was f**ked sorry guys!

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

    • That's not a transistor --- it's marked ZD1 which makes it a zener diode. As to what the breakdown voltage is, not enough there to divine.
    • Hi all, Long time since I've posted here. Looking for some advice on what I can remove to further identify the cause of my issues.  I can move the passenger seat forward and back but the knob used to adjust the seat angle is pretty much free spinning, there's very little resistance.  Removing the side cover I can see that the chain is intact but the shaft for the adjustment spins without the gear attached to it moving.  What's my next step for disassembly here? Is this a common fault? Just being a little cautious as I didn't want to start removing bolts for a spring to fly out or something equally as stupid.  Cheers
    • The incentives are mostly the same, yes. Ethanol is cheap compared to the cost of doing 98-100 RON with crude oil alone. 87 to 93-94 AKI all with E10. In 2020 Canada mandated E10 as a part of their "renewable fuel standard" and is supposedly going to go to E15 in 2030. In California where there are only 8 refineries with two threatening to shut down next year it's been over 20 years now of E10 and 91 AKI maximum because there's just not enough refinery capacity or crude oil supply relative to the demand for premium unleaded fuel. And CARB's low carbon fuel standard means functionally none of the diesel available at the pump is made from crude oil anymore. It's almost all entirely 20% biodiesel blended with 80% renewable diesel (hydrotreated vegetable oil) now. The number of gasoline vehicles that support E15 or higher ethanol concentrations is surprisingly low, I can't imagine it being wise to play tricks like this without flex fuel sensors in most of the fleet.
    • It's almost certainly the same as the one next to it. Have a fish around amongst these hits https://www.google.com/search?q=surface+mount+transistor+m33&sca_esv=9cb49794e0b2005d&source=hp&ei=2vJ5aNjTB7Kw0PEPldnS8QM&iflsig=AOw8s4IAAAAAaHoA6qkfmF6XcygtrZ4Vu9f92NXF_RFd&ved=0ahUKEwjYqIPP7MWOAxUyGDQIHZWsND4Q4dUDCA8&uact=5&oq=surface+mount+transistor+m33&gs_lp=Egdnd3Mtd2l6IhxzdXJmYWNlIG1vdW50IHRyYW5zaXN0b3IgbTMzMgUQIRigATIFECEYoAEyBRAhGKABMgUQIRigAUjKCFAAWABwAHgAkAEAmAHfAaAB3wGqAQMyLTG4AQPIAQD4AQL4AQGYAgGgAuYBmAMAkgcDMi0xoAfMBLIHAzItMbgH5gHCBwMyLTHIBwU&sclient=gws-wiz
    • South Australia, which is hardly as far behind as the rest pf Oz makes out, and who is also not a paragon of progressiveness (read that as over-legislation) in the area of vehicle standards, has this to say on the subject: Adjustable coil-over suspension Aftermarket adjustable coil-over suspension components are suspension units that incorporate an external thread on the main body and corresponding threaded spring saddle that allows the vehicle's suspension height to be varied. If fitting aftermarket or coil-over suspension components you must submit an Application to modify a light motor vehicle form and a report from a light vehicle engineering signatory (LVES).
×
×
  • Create New...