Unusual amounts of knock at unusually low timing

[RobertISaar]

i'd unplug the set timing connector and grab a timing light to make sure you're actually seeing 6*BTDC.

[Danspeed1]

i'd unplug the set timing connector and grab a timing light to make sure you're actually seeing 6*BTDC.

I'm 99% certain but I will check again and verify just to be 100%. I reset the timing just before I began tuning. Ill post back my results tomorrow when its not raining lol!

Dan

[Danspeed1]

Ok, just checked the timing. It's set exactly to 7 degrees, I can tweak it to 6. Will the difference of just one degree make a huge difference in the overall tune?

[steveo]

no.

again for you to actually hear pre-ignition you'd have to have grossly over-advanced the timing

I don't think you're chasing detonation here, i think its noise from something else.

[Danspeed1]

The only thing I can fathom is that my ignition timing is so low, that when it pulls an additional seven degrees advance what I'm actually hearing is a popping from it being so retarded. Against my better judgement I just might pull the wire for the knock sensor and try running it. Maybe I'll top it off with some race fuel just to be on the safe side.

[steveo]

so far all you know is "there is a noise" and "your knock sensor filter doesn't discard the noise (probably because its loud)"

i really dont see where the ignition timing theory comes from

[Danspeed1]

so far all you know is "there is a noise" and "your knock sensor filter doesn't discard the noise (probably because its loud)"

i really dont see where the ignition timing theory comes from

I'm with you Steveo, but what concerns me is the fact that the noise only occurs at WOT and sounds exactly like knock lol. I am not totally even sure how to diagnose it to be honest. I could try getting the car up on a lift and do a quick pull but the noise could disappear or change without the weight of the car. It sounds like its coming from the engine, but its a fresh rebuild done by a professional shop. And its not like anything else I've heard. Ill keep messing with it and post my results. On the bright side, plugs look great, not indicative of knock at all. So close to getting this thing done; one step forward to steps back.

Dan