so it was all in the tune then ziad?

 

I will go through my logs, but I have cases of ZERO knock at 3.9v and 12-14 counts at 0.5-1.0v. For this reason I do not trust AEM knock control entirely. Its pretty obvious on a dyno when you are still low timing on a given fuel. Some engines are inherently noisy because of piston to wall, valvetrain (I think of solid lifter cars), and turbo selection. Turbos that surge can register "knock" because of the frequency involved sometimes. I have only seen that in a few examples so I dont think its too common.

You may have been getting some misfire noise which the knock sensor records as knock though it is technically something entirely different.

 

maybe thats what it was... i havent done a good couple of runs yet... will comment more maybe it was just lucky.

i have the plugs gapped at 0.6 maybe i need to regap them to 0.55.

 

Gap them smaller....like 22.

 

I forgot to mention Appauld, that I do wholeheartedly agree with though, phantom knock when you can determine it is Real and True phantom knock will generally be in low Volt range.

 

In the case of our cars the "phantom knock" can be attributed to drive train noise that is being picked up by the over sensitive knock sensor. Thus, if we desensitize it a bit by raising the knock multiplier tables we can effectively eliminate phantom knock.

True engine knock will set off the knock sensor like crazy. It will have huge spikes in voltage. While phantom knock will result in minor jumps in voltage that cross the knock threshold. I did these tests on my own car and the stock ecu. That is all I am trying to say.

 

How much does one raise the multiplier values?

 

I used to always have sporadic knock on spoolup and here and there throughout the rev range on boost, turns out it was my boost solenoid clicking triggering it. Didn't help that it was resting against the intake manifold either.

 

I raised all 3 by 2 points. No phantom knock for me.

DO NOT raise them very much....you can effectively disable the knock sensor....BAD...very BAD.

 

Appauldd, do u mean the low, mid and high knock multiplier raised by 2-3 points?
Whats ur settings?

 

Ziad,did you end up sorting this out?

I just had some GSC S1 cams installed also and i'm now seeing 36 knock count even at 25% throttle around 2500 to 3500ish rpm and 80-100 load. Pulling timing, adding fuel hasn't helped at all for me. I do have upgraded beehive springs, and the lifter were bleed. Doing a pull from 4000 rpm show no knock at all...

 

mate.. u what fixed the issue... increasing timing.... i have no idea why. put it back to stock.. increased a little and there u go almost no knock... on stock knock tables... even on the sd rom no problem... pity i am going to crappy fuel and hence decreasing timing which causes knock.

btw i was never 36... but it would quickly jump to 18or so.

also atleast on my car i have noticed it i cant put much timing above 5.5k rpm, maybe the cams for 8mr and 8gsr are supposed to be different??

 

Well I tried going back to the stock timing maps, tried less timing, and more timing and had no luck fixing it. I've had my local workshop use some det cans to confirm there's no knock but didn't want to touch the knock tables unless it was the last resort...

I have made some small changes to the load, low and mid multipliers to prevent knocksum coming up, which has fixed the problem.

My timing is conservative at the moment... now the low load knock is sorted I should have the tune finished soon. Will be interesting to compare to yours as the next planned mod for me is a bbk lite.

 

yeah the load KC tables looked like mine... i used the united 100 ron so it helps. now that i am back with 95ron its a pain. as a lot of strange knock comes back up. as someone said maybe u need to turn the knock control off. use det cans to tune and then turn on again and adjust till u get no knock again.

btw who is ur tuner

 

funny you mention fuel. A mate and i installed my S1's and i didnt encounter any knock then one day ran my tank dry and i filled up with BP Ultimate98 to see if there was a difference in fuel...i got some really bad random knock 12-15. went back to Caltex Vortex98 and never saw it again. car had more of a lopey on idle with the BP also.