Am I knocking?
#1
Am I knocking?
Hi guys,
Im running a Rev MS3 with Flow Force 640cc and Innovate LC-2 on a otherwise stock NB2.
I'm using Revs basemap spark timings.
Around the 3k rpm, range I can hear a audible sound which i think is knocking.
Are those spikes knock or am I on crack? Logs are attached.
Im running a Rev MS3 with Flow Force 640cc and Innovate LC-2 on a otherwise stock NB2.
I'm using Revs basemap spark timings.
Around the 3k rpm, range I can hear a audible sound which i think is knocking.
Are those spikes knock or am I on crack? Logs are attached.
Last edited by Ivan; 10-18-2016 at 01:17 AM.
#4
Thanks Rev
I forgot to add, this is with 91 Octane.
I have a couple follow up questions:
I forgot to add, this is with 91 Octane.
I have a couple follow up questions:
- Should I lower the ignition advance in this area? Based on a couple of your base maps that I have found, 22 degrees at 88kpa and 3000rpm seems on the low end in this area.
- Should I install colder plugs? I'm currently running the stock BKR5E
- Should I adjust the Knock threshold, the current one in your basemap seems rather high, 50% at 3k rpm, while this log showed knock at 7%
#5
If you see knock on the log and you hear knock in real life, then you need to address the knock. If you decrease timing and it goes away then you have bad gas and should tune accordingly (22* in that range is definitely conservative), if it still doesn't go away then you will need to start troubleshooting for what might be causing it
#6
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If you see knock on the log and you hear knock in real life, then you need to address the knock. If you decrease timing and it goes away then you have bad gas and should tune accordingly (22* in that range is definitely conservative), if it still doesn't go away then you will need to start troubleshooting for what might be causing it
So from where I stand either you're not running real 91 octane, or something else is afoot. Even with the higher compression of the VVT this doesn't sound right to me.
#9
The timing was checked when I installed ms a few months ago. It was dead on.
I lowered the ignition timing in that area and the knocking went away. I guess this points to bad fuel.
I've been primary filling up at my local Costco. I'll try some other stations and report back
Thanks everyone.
I lowered the ignition timing in that area and the knocking went away. I guess this points to bad fuel.
I've been primary filling up at my local Costco. I'll try some other stations and report back
Thanks everyone.
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