Torque Knock PID - may have some progress...

Leading Edge Tuning · July 19, 2014, 05:05:19 PM

Quote from: wasinger3000 on July 19, 2014, 04:38:01 PM
Quote from: FoMoCoSHO on July 19, 2014, 10:15:14 AM
Quote from: wasinger3000 on July 19, 2014, 01:39:49 AM

Found some knock.

How I'm getting it at 35% ish I don't know.... only thing I can think of is the fuel just won't mix right.
Its not the fuel, mine does it too. I think its happening under heavy throttle, coupled with an abrupt lift. I need to redo my data logging parameters and try to pin it down. Its not dangerous at all for us but could be for the guys running straight gas. Consider only A6's motor came apart under that same circumstance. It also explains why some of us have noticed throttle response going away under spirited heavy off-on conditions.....the car is seeing knock and goes into self preservation mode.
Well that's good to know. I might have to ease off the throttle after a wot run.

One thing I've been thinking about is this, if I have a meth kit and if at some point I floor it to pass and the meth doesn't spray because of a mechanical failure will the car be able to pull enough timing to protect it? to Or will I be picking parts up off the road.... that's the one thing that keeps me away from meth right now.

It depends on how the tune is setup. I set mine up to take advantage of meth, but not to be dependent on the meth. This would be a question for your tuner...I don't ever want to have to worry about a customer blowing their motor because their meth kit failed...

panther427 · July 19, 2014, 05:10:28 PM

That's the reason I plan to run water meth not straight meth. A tune will not be depending on the extra fuel as much as just the intake cooling effect.

Leading Edge Tuning · July 19, 2014, 10:11:51 PM

Quote from: panther427 on July 19, 2014, 05:10:28 PM
That's the reason I plan to run water meth not straight meth. A tune will not be depending on the extra fuel as much as just the intake cooling effect.

Again, it depends on the way your tune is setup...I recommend 100% meth, but I don't setup the tune to depend on it, ONLY to take advantage of it...

FoMoCoSHO · August 05, 2014, 09:23:37 AM

I was able to verify this today, it is knocking after wot abrupt lifts. Turned corner, downshift to 1st let off and saw 1.5 on the gauge.

ShoBoat · August 05, 2014, 09:28:28 AM

Quote from: FoMoCoSHO on August 05, 2014, 09:23:37 AM
I was able to verify this today, it is knocking after wot abrupt lifts. Turned corner, downshift to 1st let off and saw 1.5 on the gauge.

Curious, you are not tuned correct? Although 1.5 really isn't anything the car can't handle. Need more data, was this just after a heat soak? What were your other readings (IATs coolant temp).

At least it's protecting it's self. I'll have to take a look at mine and see if I have the same issue.

FoMoCoSHO · August 05, 2014, 10:07:11 AM

Quote from: ShoBoat on August 05, 2014, 09:28:28 AM

Quote from: FoMoCoSHO on August 05, 2014, 09:23:37 AM
I was able to verify this today, it is knocking after wot abrupt lifts. Turned corner, downshift to 1st let off and saw 1.5 on the gauge.

Curious, you are not tuned correct? Although 1.5 really isn't anything the car can't handle. Need more data, was this just after a heat soak? What were your other readings (IATs coolant temp).

At least it's protecting it's self. I'll have to take a look at mine and see if I have the same issue.

I am untuned conditions were low 70's no heat soak. Consider that A6's car blew up on a lift condition. His car was tuned. Also consider that I am at 100 octane and seeing knock, so what is going on with the cars with much less knock resistant 93.

It is starting to make sense why the throttle disappears during spirited on off driving.

FoMoCoSHO · August 05, 2014, 10:24:51 AM

Maybe one or more of our esteemed tuning vendors will chime in here.

Leading Edge Tuning · August 05, 2014, 10:33:08 AM

As sensitive as the knock sensors are on these motors, it is a fairly common occurrence to see knock when you let off the throttle. There seems to be noise created from the TB closing.

As far as power going away in repeated runs, the tuning has safe guards based on IAT, coolant temp, cat temp, valve temp, flange temp, EGO temp...well, you get the idea...

SHOnUup · August 05, 2014, 10:37:49 AM

Only time I get timing pulled is when easing into full throttle from a roll(still quick throttle , just not punched to floor)...any foot to the floor action gets 0's....

FoMoCoSHO · August 05, 2014, 10:46:47 AM

Quote from: SHOnUup on August 05, 2014, 10:37:49 AM
Only time I get timing pulled is when easing into full throttle from a roll(still quick throttle , just not punched to floor)...any foot to the floor action gets 0's....

Interesting. Mine adds.

SHOnUup · August 05, 2014, 10:51:36 AM

If I lightly accelerate in a normal driving situation on e-way it instantly starts adding timing right up to -4....it's weird that the smooth yet above normal throttle pressure to wot at a roll gets a +1.5 knock reading...maybe due to not getting the downshift?

ShoBoat · August 05, 2014, 10:52:09 AM

Quote from: FoMoCoSHO on August 05, 2014, 10:46:47 AM
Quote from: SHOnUup on August 05, 2014, 10:37:49 AM
Only time I get timing pulled is when easing into full throttle from a roll(still quick throttle , just not punched to floor)...any foot to the floor action gets 0's....
Interesting. Mine adds.

Same here mine adds timing, I was just out for a drive and nada. Mine is not pulling timing at all. I was trying to duplicate this effect and I couldn't. Interesting after the mod to the Airaid and the installation if the RX I almost never see any timing pulled they were done at the same time. Once in a blue moon I get .5 and that's it. I will keep an eye on it.

Brucelinc · August 05, 2014, 10:53:39 AM

Quote from: SHOnUup on August 05, 2014, 10:37:49 AM
Only time I get timing pulled is when easing into full throttle from a roll(still quick throttle , just not punched to floor)...any foot to the floor action gets 0's....

That behavior is similar to mine. Easing in the first part of the throttle seems to add timing. A little deeper into the throttle pulls it and then at WOT it is at zero. I haven't seen more than a +2 under any conditions, though. This occurs in higher gear/lower RPM scenarios.

SHOnUup · August 05, 2014, 10:55:17 AM

Quote from: Brucelinc on August 05, 2014, 10:53:39 AM
Quote from: SHOnUup on August 05, 2014, 10:37:49 AM
Only time I get timing pulled is when easing into full throttle from a roll(still quick throttle , just not punched to floor)...any foot to the floor action gets 0's....

That behavior is similar to mine. Easing in the first part of the throttle seems to add timing. A little deeper into the throttle pulls it and then at WOT it is at zero. I haven't seen more than a +2 under any conditions, though.

I had a +2 first time out testing with 3 bar but have only seen +1.5 since...cars learning I think...hope...has to right

SHOnUup · August 05, 2014, 10:58:26 AM

We have some consistency, that's a good sign. Wonder with it being tuned that those mid range throttle pressure ventures to wot missing the downshift is the cause?