Jump to content
SAU Community

How Do I Log Both Knock Sensors With Datalogit ?

-wj-

By -wj-,
in Engines & Forced Induction

 Share

Recommended Posts

-wj- Rookie

-wj-

Posted
Posted

Hi guys, I've got an S13 with an RB25 engine in it, and I'm remapping it myself.

I've got some mild knocking numbers close to the redline (it's got a power-fc pro, so ignition cut on revlimiter), and I'd like to know if there is any difference between the front and back knock sensor...

And for the record, what a/f ratio should I be aiming for at what load level ?

William

paulr33 Grand Master

paulr33

Posted
Posted

the knock sensor signal in the powerfc is presented as a single value, that is, you can't see both

the only way to log both would be to have a multimeter on both signal wires

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

you sure about that ?

Have you played with the raw logging data that you can save out of the datalogit software and then import it into excel?

It has 2 knock values. they are different values on my engine, the rear of the engine is nosier then the front on mine. which showed up on the stock power fc datalogit knock sensors & on my Gizzmo KMON.

the knock sensor signal in the powerfc is presented as a single value, that is, you can't see both

the only way to log both would be to have a multimeter on both signal wires

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

Your such a help mate.. lol

Sorry. Start logging with datalogit and when you wish to see what you have run, save the log file or when you disconnect it will ask if you wish to save, open the log file with notepad press controll A. edit copy.

Open microsloth excel and paste into there. Drag down the sticky cells to the cell information and the first knock sensor is there, scroll across to see the second knock sensor.

I delete all the crap i dont need and have a excel file with all the usefull information i need.

one tip, Knock with a power fc.. = BBAAAA BUMMMMMMM totally useless information with anything more then 200 to 240rwkw and above.

you sure about that ?

Have you played with the raw logging data that you can save out of the datalogit software and then import it into excel?

It has 2 knock values. they are different values on my engine, the rear of the engine is nosier then the front on mine. which showed up on the stock power fc datalogit knock sensors & on my Gizzmo KMON.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • GTSBoy
      Ethanol Content Sensor - Always at 11%?

      By GTSBoy · Posted

      The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      Yes they do. For some maybe. But for those used the most by abusers, ie Skylines, the numbers are known. The stock eyebrow height for R32/3 Skylines is about 365/375mm or thereabouts. The minimum such heights are recorded in adjacent columns in the database.
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Hmmm, interesting. Makes me wonder whether there is bias as well. It's the cheapest fuel, so it is used for all kinds of ill-maintained shitboxes which are bound to have issues regardless. Nicer cars tend to require higher octane rated fuel and can't use it anyway. FWIW, the official NSW E10 facts page is decent. 
×
×
  • Create New...