Not an absolute expert with this stuff, but with logs I have looked at from other EVO's that I have logged, it looks like your injectors are maxed out. It also looks like you are maxing them out to throw more fuel at it to get rid of the knock, which I don't think you should worry about. I agree with dan_l here and I would not worry about it at all. I have seen/heard bone stock EVO's knocking 8-9 counts right form the factory!

My logs have some slight tip in knock when boost hits and there is not much I can do about that because of the sudden boost jump from 5 to 25lbs (GT35r).

I wouldn't worry until you get more than 4-5 counts continiously every time. It seems like this is more sparatic and sometimes there.

Another thing to not rule out is it could be your downpipe or exhaust hitting from during this stage of the pull. Just an idea.

Good luck,
~Zach

 

This is most definately phantom knock.

I boost more than you're running and AFR's at 11.5-6, 0 knock. My timing is also higher than yours (91 octane..) Higher by 2-3 degrees. My IDC is slightly lower probably due to you not removing as much fuel.

I had this sort of knocking issue also, then figured out it was my downpipe hitting the crossbar beneath the car.. Added some spacers and its been fine since.

Now I'll get knock like that occasionally if I'm on a bumpy *** road while going WOT.

On my '3rd gear pull' road I use its smooth and i rarely ever get knock on there

 

Well the problem with the “fat and happy” theory is how people implement it. They run “fat and happy” and compensate with the ignition timing they *think* they should be running by what *other* peoples cars run. The thing is you should put your AFR to an efficient point then work on timing. If you’d like to run a little richer to account for something then fine but the problem is when you have a fueling issue like a stuck injector, failed injector coil, or a failing fuel pump that single AFR point or more isn’t gonna do dick as your cylinder goes lean or all of them go drastically lean.

Furthermore too many people run “fat and happy” and push the ignition timing to the knock threshold and then back it off a little. The problem is that lots of ignition timing makes the car very sensitive to the detonation threshold. Small weather and/or temp changes can quickly induce knock to your “fat and happy” tune.

I know everybody has their own style and I respect that, I was just throwing out my ideas out their. I’ve never hurt a valve, never hurt a piston, never hurt a motor part ever with my method. Mid 11’s on a stock 164K mile motor that I just pulled out this weekend to rebuild to make stronger is all I have to show for it.


EDIT:

Here is a turbo honda that was running "fat and happy" when he had an injector failure. That is me running "dangerously lean" beside him.

http://vids.myspace.com/index.cfm?fu...=773244639&n=2

 

He is at 83% in that log.

 

I have since leaned out to 11.5 across the board. Timing soon to be changed.

I don't believe I should have any sort of issues with metal on metal movemtent. I've replaced the stock cat with a test pipe...and a Dejon tool intake. That's about it.

 

If thats a high gear pull, youre fine!!!

I tune for 1-2 counts on a 4th gear pull personally and my car hasnt blown up yet.

 

98.9% duty cycle.... time for some bigger injectors

 

I've re-tuned the car for 11.5 AF.
I was reading that other people push pretty rich AF ratio's but I stopped listening to them. 11.5 is fine.
My duty cycles are somewhat more reasonable now.

I'm a little perplexed about putting in a new fuel pump and not being able to tune closed loop. I guess people really rely on the stock ecu to just compensate the hell out of everything.

 

hmmmm

 

How accruate are those inj duty cycle readings? I see peeps making 400whp on stockers, but a log i took the other day said i'm around 95% and i'm around 300.

 

I think that is with meth, since you can lean out your afr to account for the meth. I'm at 300 on dyno dynamics / 350-360 on mustang.. with 750cc injectors my duty cycles hit a max of 80%.

 

obviously it depends on your AF ratios as well. If you're pushing a really rich, then your duty cycle is gonna be higher.