Seal

I autotapped the car today, and i picked up 7 degress of knock at max... it would fluctuate between mid 4s to 7.0

i'm running on 93 octane, and my cam has a tune from ion...

what would cause the knock?

i thought it was false knock, but i capped my exhaust (closed the cutout) and still got the knock (it was actually worse)

what can this be from?

PatriotTA

If you have headers, they could be the cause. Also a noisy valvetrain like aftermarket rockers and such could also cause false knock. Do you have a stock knock sensor, or an LT4 one? If you still have the stock one, I'd reccommend you pick up the LT4 version which is less sensitive.

Seal

i do have a lt4 KM and also my tune includes knock desentasition(sp)

96ta(nick)

i am picking up *5 even with my lt4km

mPoRtSsUcK

what can the cause be tho...

if i/we can eliminate this, it would def give us some more power

JSK333

Too much advance and/or not enough fuel.

mPoRtSsUcK

i'm actually running rich...

96ta(nick)

hmm same here

CoUnTryMuZiCZ28

When i dynoed i showed a max of 9. something degrees of spark retard.. Mine was because of an exhaust leak.. It should be all fixed now. I hope..

JSK333

If you've been running rich, your plugs could be fouled, which I've seen can cause pre-ignition.

When I changed my plugs after getting knock on nitrous, the knock went away. The old plugs were fouled.