Knock around 20 psi.

[Gasolinebaptism]

Build is as states in profile.
Link V2. I've never had problems with knock before at 24 PSI on 92 octane.
I pulled so much as 4.2* of knock on a few pulls right around 5k rpm, which is where I spool.
Things that have changed, it's cold outside, probably about 40*.
On top of that, as you'll see my coolant temps never rise much, I don't have a thermostat in the car right now because it had been over heating, I've since gotten to the bottom of it, and need to reinstall thermostat.
It's not a DD by any means, but need to get to the bottom of it.

The log is about 10 minutes long, multiple low rpm pulls and pulls in boost. Do you think the cold weather is causing the knock?

On one hand, it would make sense for the cold weather to cause knock, because more oxygen will be going into the engine, but on the other hand, it's obviously colder..
I guess my confusion lies in the fact that it should be perfectly directly proportional between air density and temperature at a given elevation.

 

[doubleclutch99]

It appears that your tps needs to be adjusted, and the thermostat needs to be in the engine. i never seen above 119 degrees anywhere in the log . it needs to be up to full operating temp so you can get out of the cold fuel map. always remember garbage in equals garbage out. if your comparing the way it runs now to the way it ran before when everything was operating right. you won't be able to track it down. also your o2 shows lean pretty consistant with the knock i see in the log. i'd guess your a little lean. but without a wide band to tell exactly where your at it's only a guess.

 

[Gasolinebaptism]

Well I have an NGK AFX wideband, recording 11.2 at WOT.
And it doesn look like my TPS is 5% off. but I don't see why that would cause knock.
And, on top of it all, the cold fuel map would richen my mixture, more like an AFR of 10.5.
I don't see any of this adding up to knock.

 

[doubleclutch99]

There is such a thing as rich knock.

 

[Gasolinebaptism]

Guy's here are running as much as 10.0 AFR's though. That's damn rich if you ask me.
And i just tested my thermostat, which is stuck open. I'll buy a new one, probably another 160 F.
And I'm also hoping to switch to E85.
Do you mind taking a look at my fuel and timing sliders?
I'm very new to link, and I didn't make this tune.

 

[Calan]

I took a look at the log, but it's really hard to get much from it without boost and/or AFR being logged. AFRatioEst is way off due to the properties not being set correctly, but even if it was correct you can't do much with it since there is no WB. Same thing for BoostEst and no MAP sensor being logged.

The fuel sliders don't tell us anything, because again we have nothing to compare to. The timing sliders look a bit notchy, but on a 1G factory map that really isn't all that uncommon.

I would suggest getting the WB hooked up, adjusting the TPS, and then going from there. And with your setup's potential, you REALLY owe it to yourself to upgrade to at least V3 lite, and also pick up a MAP sensor to log boost.

 

[Gasolinebaptism]

So like an AEM 5 bar map sensor?
And I have an NGK AFX wideband, just need to figure out how to run it into the ECU. I saw something about wiring it into pin 4?
And again, I'm new to this tuning business.
And what do you mean my notchy timing to not be uncommon on a "factory 1g map"?
Where would be the proper place to tap the AEM into? Probably right in the center of the manifold somewhere?
Now how much more tuning capability will I have under V3?
I know I have a lot of questions.. But hey, that's what the forum is for.
]And I take it you're set up on speed density Calan? I'm curious about this if I do end up going for V3, I know that there are a ton of threads on it though, so I'll poke around about it.

Or would you recommend sticking with an AEM 3.5 bar MAP? The highest the car has seen is 33psi. But I wouldn't hate to hit 40 one day. I definitely wouldn't go above that though.

 

[Calan]

Whoa! Slow down there homie... you're making my head spin.

So like an AEM 5 bar map sensor?

A 5-bar isn't really necessary unless you are running a lot of boost. A 4-bar seems to be a good compromise between a decent amount of boost and good resolution, and ECMTuning offers one that works pretty well. For 35 psi boost or less, a 3.5 bar will work just fine.

externalsensorlist [ECMTuning - wiki]

And I have an NGK AFX wideband, just need to figure out how to run it into the ECU. I saw something about wiring it into pin 4?

externalsensorinput [ECMTuning - wiki]

And what do you mean my notchy timing to not be uncommon on a "factory 1g map"?

V3 lets you define your own timing values for any RPM and load. Otherwise, you are limited to the factory tables...and on a 1G the timing is very (overly) aggressive and requires a lot of adjustment.

2gtimingin1gecu [ECMTuning - wiki]
The DSM ECU Timing Curve

Where would be the proper place to tap the AEM into? Probably right in the center of the manifold somewhere?

http://www.dsmtuners.com/forums/tuning-engine-management/403159-speed-density.html

Now how much more tuning capability will I have under V3?

v3summary [ECMTuning - wiki]
prodcompare [ECMTuning - wiki]

And I take it you're set up on speed density Calan?

Yep

sd101 [ECMTuning - wiki]
sdsetup [ECMTuning - wiki]


*****

Spend some time crawling all over the wiki site and check out the demo videos. That will answer a lot of your questions...even the ones you don't know to ask yet.

 

[Gasolinebaptism]

Thanks Calan.

 

[Calan]

No problem... post up another log once you get a little further along and get that wideband wired in, and we'll get you tuned up. Might wanna stay off of the go pedal until then though.

 

[Gasolinebaptism]

Will do. V3 and the Map sensor will be a bit in the making. Holidays and anniversary are on their way.

 

[Dert]

I recommend v3 lite or full and ecm's SD package, you get a 4 bar MAP sensor and an IAT plus pigtails for under $100, plus you can get a plug n play SD cable making install litteraly take 10 min to install and set up. Do as Calan says and watch all the tutorial vids and do alot of reading as it is all extremely helpfull, plus use the forums if you get stuck, good luck