I have attached the last log i did tonight (the first 2 were no better)

3500rpm ~200load, 5* of timing it's 6 counts and 11.7AFR
3700rpm 230load, 0* timing it's at 14 counts and 11:1AFR
4000rpm 230load, 0* timing it's at 14 counts and 10.1:1AFR

The high knock count, low timing and rich AFR continue to 6800rpm where all is well again. This is at 18-20psi and 93oct

Setup:
Evo 3 car/motor
Evo 8 ECU/MAF/Knock sensor
Built 2.0L 9.3:1 CR (stock crank, Wiseco HD's & Manley rods
Evo X turbo with 20G compressor and custom short runner manifold
24x12x3.5" AGP bar and plate intercooler
Perrin filter on custom 3" intake
3" TBE with 1.75" wastegate dump
HKS 272/280 cams (stock evo 8 valve train on stock ports)
FIC 750's
BPR7EIX
Hallman MBC
93 octane

I have a rattling t/o bearing, though it does not rattle or squeak when its driving only in neutral and when it does the ecu does not register any knock

The knock sensor wire was pretty close to a battery relocation wire, i have now ziptied it farther away.

The engine is mounted with Ralliart GRP A engine mounts, the fore and aft cross member is solidly mounted to the frame with steel bushings so it does vibrate a bit

Note of interest. The pistons i bought are part number K656M85 which are advertised as 10.5:1 compression ratio. What they don't advertise is this is when used with a 4G64 block and 4G63 head. The math works out to be 9.3:1 when used straight up as a 2.0 in a 4G63 block. The only "dish" in them are the valve reliefs. Of course my "math" could be wrong but i have used a few compression ratio calculators on the web and gotten the same results.

Any insight is appreciated

 

Not sure about your knock count but the ECU will richen the afrs to counter knock. Not sure if it would be that much. Sounds like something is up with your sensor. Shutting the hood is worth 4 knock counts on mine

 

Your timing is too low and your Afr's are too rich in that whole area where your knocking.

 

well i have the AFR's back in reasonable shape though i am still getting the knock.

I am going to be rechecking my base timing today. I hope that is the issue.

 

At 12-14 counts it got to be phantom knock, if such high count was real, it would be clearly audible even without det cans! You've got to go through a process of elimination to determine what's causing the phantom, otherwise, the only option would be to play with knock control settings.

 

Well the base timing is set at 5* BTDC so it's not that.

I have increased the knock multipliers by 3 to see if it clears up. I will be doing some logs later on today to see if it made a difference

 

well i found the cause for the AFR dip ....


Getting that welded up this week hopefully.