2.2L Engine, Phantom Knock

1163 Views 5 Replies 3 Participants Last post by Tephra, Jan 16, 2012

revo

Discussion Starter · Jan 14, 2012

Hello Everyone,

Since my 2.2L built, İ'm experiencing heavy phantom knock problems.
İ already increased the knock filter multiplier table, but i'm reluctant to increase it more. İ'm at 23 mid range and 21 uptop. İ would be grateful if owners with 2.2l setups can share their knock filter multiplier table so that İ have an idea of what the values should be.

Thank you

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Beeble

· #2 · Jan 16, 2012

I posted this on the other forum, so here goes...

this was verified using a knockbox/headset + dyno , 93 octane, 26-27psi boost and a 2.2 with CR9.5
That is all the boost i ever plan on running with 93

There are peaks where it knocks on my motor
Mine was at 4500-5000 and at 6000-6500.
I'm sure every car will be quite different, but this is what worked for me

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Beeble

· #3 · Jan 16, 2012

Oh and PS you REALLY need to set these on a dyno with detcans/headset.
i thought i had phantom knock at 6000rpm and fairly low timing, but it was real.

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revo

Discussion Starter · #4 · Jan 16, 2012

Hello Beeble,

I've tried to pickup knock on detcans, but the lifters make such a big noise
I am not sure what i am hearing!
What timing did you end up running at 6000 rpm and what is your boost at this rpm?
Can you send me your email address pls?

Tks

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Beeble

· #5 · Jan 16, 2012

You'll know it when you hear it. it sounds like gravel rolling around in a tin can, is the best way i can describe it.
I'll send you a PM

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Tephra

· #6 · Jan 16, 2012

http://theknockbox.com.au/the-knock-box/sound-recordings/

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