knock knock

[Cruisin1966]

. . .I usually use Pedal Position in my logs. Good enough to see when you go WOT or not. . .

I know some of us have the option for Pedal Position %, but the Challenger's don't and the Trucks may not either. Just something to keep in mind

[09Laramie]

Got a log with a couple better runs- one from a full stop (right at the beginning- might have been a little delay from when I hit the button though) and one from a relatively slow speed. Both were long enough, and started at a low enough speed to have a gear shift in them.

I'm a little confused by the runs though- got no knock, or at most 0.5 degrees ST in the lower gear, then after the gear shift it jumped up to 2 to 2.5 degrees ST and then gradually tapered down. Is this what it's supposed to be looking like? I was under the impression that it might spike to 2ish and then drop back off to 0 if everything is done right.

Thanks again for the help.

[lross78550]

2009 Dodge Ram Hemi 4X4
Laramie Here is my 3rd run at WOT after adding fuel at 4% 6% and 7%. Im running the 93 oct tune with 93 oct fuel.
I got rid of Long term knk completely. I'm still getting ST KNK and im going to try adding another %5 to the top 2 rpm ranges to see if that helps the ST KNK. So far I havent had to change the timming at all. I did raise the shiftpoint, rev limiter and the partial throttle upshifts.
anyway here is the log file

Check out Log # 3

[09Laramie]

bump

Am I correct in that I should add fuel to get rid of the knock that I was seeing after the gear shift, even though I didn't see much, if any, knock in the lower gear?

[Oosik]

Random question, which gauges did you use for each parameter? I'm tuner illiterate, so I'm trying to learn. Any suggestions on a place to learn more about what I want from each parameter?

[butch1581]

These are the only two points where I had any KNK at all, after each "spike" it returned to zero right away. Is this ok or should I add fuel? Thanks

[butch1581]

I still dont get how to post a log on this site. I cannot read anybody elses either????

[Oosik]

Did you disable your MDS? I seem to get a lot of knock when the MDS turns on. I'm only running the 87 octane, but I need to log some stock data now.

[butch1581]

My MDS is still on, but that should not change anything at all at WOT

[Oosik]

I haven't tested WOT, I'm just playing around with it still. I was talking about normal cruising speeds, I get a random array of knock when MDS kicks in.

[butch1581]

Got ya. I have no KNK anywhere except at WOT. I wish there was more info out there as far as how to use these things to really "tune" your motor.

[09Laramie]

Random question, which gauges did you use for each parameter? I'm tuner illiterate, so I'm trying to learn. Any suggestions on a place to learn more about what I want from each parameter?

I don't use any of the gauges- I strongly prefer the charts because it allows me to see much more detail, and also a progression over time for each of the parameters. With the gauges, you can only see that one instant in time, which can make it much more difficult to spot whatever it is you're looking for.

butch1581: I'd check the graphs again, but if you're only seeing 2 degrees max of ST KNK, and it's dropping off immediately to 0, you're in good shape. From what I've heard, the goal is to get to there, with that spike only happening around gear shifts.

To post logs, use the "Add an Attachment" section under where you would type your post. You have to be on the regular editing page to see this, you won't see anything in the thread under "Quick Reply".

To download somebody else's logs, right click the Download link, and click "Save Target As". Then you can change the file name if you want, and click save. Then you should be able to open the file from DataViewer.

[Oosik]

Any luck getting the knock to go away on the 87 tune? I'm running 89 octane and switched back to stock because I'm worried about engine damage.

[Kahler]

Buch1581-- oosik,, Im with ya !! Been following your thread and going through the same stuff. Anyone know where we can get info on tuning and what to do ? A good book/manual/pdfile,c-d anything !! I have read everything in these forums and challangertalk.com forum also. I sifted through mounds of info trying to learn. I need (Tuning for Dumbies book) any ideas

[Oosik]

http://www.diablosport.com/index.php?mo ... lay&pid=98

That mentions you change the spark to lower knock, or do you change the fuel?