Hi all,

I've just started tuning and logging my car and i've run into some concerns. I was also wondering if any of you could take a look at my logs to see if i'm on the right track.

I am getting 1-2 counts of knock while cruising and I am unsure if its normal or not(probably not lol). On my WOT pulls I have no knock but I think I get 1-2 counts whenever I give the car a little gas while cruising and Ive seen it right before I start a WOT pull. I have attached an evoscan log of the knock. Unfortunately I had to log the afrs with logworks because I couldn't get the LM1 to work with evoscan and nothing saved when the laptop ran out of batteries

Also one last thing, I was wondering if my load values correspond with any evo8s you have tuned with my mods. I think i'm running 20 lbs of boost but I have a prosport gauge so who knows. Maybe I should buy a stock solenoid and a JDM map sensor =/.

 

1-2 counts of knock at random spots is nothing to lose sleep over, if it is in a consitent spot on your map then you should either reduce timing or richen the fuel or both.

but since you say you are crusing you should be in closed loop anyhow.


and JDM MAP FTW

and hitting 240 load is pretty good

 

2 thing to consider w/ knock...

1. Is it consistant? If so then do as justboosted said, and retard 1* of timing or richen up the AFR a bit.

2. I wouldnt really even worry about it unless you see 3 counts or more in the same rpm range consistantly. If you NEVER see knock, your tune might be too conservative IMO.

 

Ok. My 2 cents. Log TPS as well. Purchasee Data Log Lab for $50 so you can figure out if you are making more or less power with your changes. To be honest knock counts of 1 or 2 I generally ignore. Knock at part throttle I worry even less about because it is less dangerous in my opinion. Post up your fuel and timing maps so we can take a look. Your timing looked alright except it looked kinda high in low load (45). Did you increase that part of your timing map? You want to shoot for 3 degrees at max torque/load and 12 or so at redline. A/F should be 11.5 to 1. JDM sensor is definetely the way to go. I have prosport as well and it is now way off from the JDM map (wasn't always) I just ordered another one assuming it is broken. Is this a common thing with the prosport guages for them to be inaccurate?

 

You're fine. Also, if you have an LM-1 and Logworks, then why not just use LogWorks to log and analyze your runs. Logworks has some really nice freatures that make it very easy to analyze the log, like the graphical format, etc.

How many miles are on your Evo? That 1-2 counts of knock at very low load is nothing to worry about and depending on your mileage and other factors, it could be a tiny amount of phantom knock.

You have 0 knock under load, so it looks like you are doing fine.

 

I did not tune the timing maps, it was done by kunizeee a while back and from what I understand he had to change some of it to keep my IDC's low since I was still on the stock fuel pump. I'm not too sure on how to modify the timing maps but if you think my maps are off feel free


From what ive searched on the forums, prosports usually end up 1-2 psi off...but mine isn't even centering at 0 anymore. They do seem to have good customer service and 1 yr warranty, going to send in the gauge to see if its broken or not.

Also the car has 47000 miles on it now

 

I live right down the road from you and I would offer to help you out, but I don't even have enough time to work on and tune my own car.

Do you know how to use ECUFlash to flash your ROM? If not, read the stickied thread from nj1266...it's a good start to get you going. If you have any questions, feel free to ask from there.

Based on your logs, though, you are looking good. You can probably even run a little more timing, depending on where your knock threshold is at.

As far as what boost you are running, I can run a log through one of my estimations if you want. But, I will need you to log load (2-byte), intake air temp, baro and RPM.

The equation I came up with is:
BoostEst=[(load*T)/(P*VE*280)]-14.7
T = actual intake air temp (not MAF temp) in degrees Rankin (degrees F +460)
P = atmospheric pressure in psi at the MAF(baro)
VE = VE of engine at the RPM being measured

Edit: Note that this equation may need some tweaking...I developed it one day very quickly with a sample log and some quick math.

Eric

 

Wow, that must be a record. :-)

 

i hope you dont have almost a half a million miles on your evo.......

timing map looks a bit weird but you have nothing to worry about with 2 counts especially during cruise....

oh and yeah log it with the 2byte so you can see exactly where you are gettin the knock so you can compare to additional pulls to find consistency

 

your curising knock is an easy fix. you definetely have more than what a stock would show. Stock would show maybe 3-4 counts of 1 knocksum. but you got like 8-10 of them in the 3000RPM 80load
all you have to do decrease timing 2-4* and you should be ok. Leave fuel alone since your in closed loop.

 

Thanks, edited my half a million miles evo. I'll try reducing the timing during low load.

krazirob: Are you saying i should log 2byte load? I already applied that mod but is there any other 2byte logging parameters?

Oh also there were two DTC codes thrown by evoscan...I've searched that the code reader isn't very useful but it said I had problems with the fuel pump relay and fuel rail. Should I be concerned?

 

no if you already have the 2byte mod on your flash then you are good.....

with that being said wherever you are having that knock, just to make you sleep better at night go ahead and lower her down 1-2 of timing and she will be golden....

i wouldnt worry though....

 

Can anyone check out how my lean spool tables look? No knock during any pulls, around 10.8-11.1 AFRs. Is the convention to tune for 11.3 and allow for variations higher from there? Or to keep it under 11.3 no matter what. 11.3 was the number i got from the how to tune and evo sticky. Does 93 octane increase this desired limit?

Also i'm knocking 4-8 counts of knock while letting off the gas during free revving around 3-5k while stationary. I've read the threads that conclude adding more timing would help but the posters seem to have much more mods than I do...I guess i'm just very cautious about messing with my timing.

Here's a picture of my maps and a log of a NLTS run and my free rev knock problem. If any you guys got some free time to look over them I'd much appreciate it. If you do check my logs, could you please check also if my IDCs are showing up on your evoscan? It's logging my IPWs but not wont calculate IDC from it.