Procede V4 CAN Knock

3coupe · 04-13-2010, 03:00 PM

Hello,

my car is completely stock. i am running stage 1 @ 30% UT 100% IC and ALL other values default (boost limit 17, boost allowance 5ms etc) on map 2-23 and on 91 octane pump gas.

i did some datalogging and i noticed that i have CAN Knock values of 1 in groups of three. i tried other UT values such as 40-50-60 and i have the same CAN knock values, again in groups of three.

does anyone know if this is creating knock in my engine, and more importantly damaging my car? if so, i will need to take out this tune immediatley.

someone please chime in.

OpenFlash · 04-13-2010, 03:03 PM

As mentioned before in a few threads, ignore CAN knock. It's unreliable which is why we don't mention it in the tuning guide. It will be going away in the next user software update. The only reliable way to quantify knock is by ignition timing drop outs (as discussed in the tuning guide). You have nothing at all to worry about.

I suspect this is why you are only running 25% UT and not the default 100% value. Completely unnecessary. You'll notice that you will even see CAN knock values of 1 even when off-boost and in conditions where knock isn't even possible. We added this CAN channel back in the day when we thought it could be useful. It's our fault for not removing it once we determined that it's not.

Shiv

04-13-2010, 03:00 PM	#1
3coupe Captain 31 Rep 645 Posts Drives: BMW 335i Coupe 07 Join Date: May 2007 Location: Somewhere. iTrader: (2)	Procede V4 CAN Knock Hello, my car is completely stock. i am running stage 1 @ 30% UT 100% IC and ALL other values default (boost limit 17, boost allowance 5ms etc) on map 2-23 and on 91 octane pump gas. i did some datalogging and i noticed that i have CAN Knock values of 1 in groups of three. i tried other UT values such as 40-50-60 and i have the same CAN knock values, again in groups of three. does anyone know if this is creating knock in my engine, and more importantly damaging my car? if so, i will need to take out this tune immediatley. someone please chime in. __________________ BMW E92 335i retired: 04 BMW M3 \| 05 Honda S2000 \| 03 BMW 330ci \| 01 Honda Prelude \| 99 Acura Type-R
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04-13-2010, 03:03 PM	#2
OpenFlash 1750 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	As mentioned before in a few threads, ignore CAN knock. It's unreliable which is why we don't mention it in the tuning guide. It will be going away in the next user software update. The only reliable way to quantify knock is by ignition timing drop outs (as discussed in the tuning guide). You have nothing at all to worry about. I suspect this is why you are only running 25% UT and not the default 100% value. Completely unnecessary. You'll notice that you will even see CAN knock values of 1 even when off-boost and in conditions where knock isn't even possible. We added this CAN channel back in the day when we thought it could be useful. It's our fault for not removing it once we determined that it's not. Shiv Last edited by OpenFlash; 04-13-2010 at 03:10 PM..
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