Koolponycar

Just wondering how many here when they get a custom tune say from ssi, 5star, Mpt etc., actually data log the tune to see what it is doing and if the knock numbers look good? And what are suppose to be good consistent knock numbers tuned compare to stock? I know a lot here are running vendors tunes, but I think some just load and go, just curious as I see people post about how good a tune is or performs. I know ssi requires a datalog for a ssi3 or ssi4, not sure about the others. I have made preselected configured PID files for data logging with the x4. Not sure how many PIDs the x4 will let you load pre-configured. Anyways just wondering and please lets not make this into a tune bashing vendor thread, just tyring to learn, thanks!

antony1103

I don't have a tune yet, but I occasionally save some data logs for different driving conditions for future reference (city, highway, light driving, heavy driving, towing, hauling, etc.). I probably have about a dozen logs saved.

I've never payed much attention to the knock sensors since I'm not hearing anything. However, I have seen how the ECU handles engine knock. I use Forscan, and I haven't figured out how its logging knock exactly. I'm used to seeing knock represented as a voltage, but Forscan seems to be spitting out a running tally of some sort. I assume that it is registering a knock event and adds to the count. Whenever there is a spike in the count, I usually see the ECU pull 3-5 degrees of timing. I see this a lot when I'm lugging in high gears.

I would think any reputable tune like the ones you mention keep a similar strategy; they retard engine timing in response to engine knock and advance timing to some predetermined level with a lack of engine knock.

05 super

done a few but never sent them in..i gotta get ahold of SSI and get a file cause i'de like to upgrade to SSI4

Koolponycar

Thanks for the information. I use to hear and some others on here have reported audible knock in the higher gears too, lugging at say a rpm of 1100-1600 rpms. My truck started that about a year after i had it, off and on and I tried changing gas, gapping plugs and new ones. it finally seemed to go away for the most part and then i recently had my SB replaced do to the cylinder bore distortion issue that some of the early 11-12 model 5.0's had.

Koolponycar

Anyone else? I thought more would respond to a topic like this as much tune inquiries people on here ask.

blue5.0

I have data logged mine but really didn't evaluate them much myself. Sent them in and had both 5 star and MPT evaluate and tweak as needed.

Koolponycar

So you had to have some revisions as you do have some nice mods to your truck. thanks for your reply, and you always share honest informative insight!

TJPlatinumEB

I have sent data to MPT numerous times. I switched away from Unleashed back to them awhile back and did the logs for them and even with the tune they sent me initially, almost no positive or negative knock. I ended up logging it two more times and they made small adjustments each time before being done.

They also could do everything on only 17psi. The power difference they can get with only a few psi over stock is amazing.

Koolponycar

I did take a look at my stock tune while normal driving and on Lambse bank1 i saw 0.84-1.03 and on the knock sensor 0.00 to -6.78, so I guess it was adding timing for the most when I would accelerate on load or up hill lug. This was mixed driving and no WOT.

Koolponycar

Did you do the 3rd gear pull up to redline?