Hey all,

I'm still learning and wondered what people though of my timing/fuel maps and my last run log. I'm trying to get my AFR locked in. Mods are in signature, adding a Walbro this weekend. Lean spool is disabled.

The log,
logworksrun.jpg

Timing Map,
timing.jpg

Fuel Map,
fuel.jpg

Occational knock counts of 1 on spool up. Feels strong but need to dyno again to be sure. thanks for your input.

 

12.3 AFR at 6600 rpm at WOT? Is this on C16 or VP import?

 

It is on 92 oct pump gas. The fuel map is pretty stock, only recently started making changes since I now have a wideband. Was told to get to mid 11's to create a safe buffer. I have been trying slowly. All the talk about Evo being rich from the factory....guess my mods have leaned things out a bit.

 

also, i think egt's are ok. i'd have to check my defi's to see what the max it has recorded. what is too hot for EGT's?

 

so you have an Evo8, running 21psi without a fuel pump? thats probably why your AFR's are lean.

 

And the psi is almost 21.5-22 at redline with the new O2 housing installed....small amount of boost creep. I might try to open the wastegate hole in the O2 transition a little to cure it. I'm hoping the Walbro will set some of the lean condition a bit lower. I know the VIII's fuel pumps are not a good as the IX so that is why it was ordered. Does it appear, I'm heading the right direction? I know each car is different but is it a good rule to shoot for mid 11's in AFR after spool up?

 

step 1 = buy fuel pump
step 2 = wind up boost and tune

You seem to have missed my point so ill be a bit more dramatic: When your engine blows because you couldn't wait for a $150 part don't blame us

 

What are your IDC's right before your AFR does that shoot up to 12AFR?

Willing to bet over 100%.

From squinting at that super small chunk of logworks it also looks like you are getting boost creep from seeing your load curve.

You need to stop going WOT with a 12.3 AFR on 92oct gas. It's not a matter of if, it's a matter of when your piston says hello to your radiator.

 

On my evo8 with the TD05-9.8 I get 100% injector duty cycle around 6000-6500 rpm with AFR at 11.2 and boost at about 21 psi.

Don't go above 6000 rpm WOT until after you put that pump in.

I don't know why you get boost creep though. I don't. But could be because I use ecu-controlled boost.

Also that logworks picture is hard to read in my opinion. Is there a different way you could present your logged data?

 

I hear you loud and clear. I have the Walbro at my house and it is going in this weekend. Would have last weekend but things came up. I appreciate your input.

 

Hmm, I am a super noob, I'll go read more since I do not know what IDC's are or how to log them in Mitsulogger or LogWorks. The boost creep is due to the newly installed Megan O2 housing. I think I need to enlarge the wastegate hole a bit since it is so small.

Really the only tuning I have done on this car was the timing and almost all the changes reduced the advance.

Thanks for your input, it is appreciated.

 

Ah, IDC = Injector Duty cycle... yea. I'm a bit slow. Not seeing it in Mitsulogger...I'll search it out.

 

IDC = IPW*RPM/1200

i think :P

 

Don't think you can log IDC in mitsulogger. You'll have to make a column in your log and put that formula tephra did.

p.s. IPW = injector pulse width. And yeah that formula gave me a correct value, Tephra.

 

Great. I checked a few of my logs with the formula and yes I am at 100ish for IDC's, more or less depending on the cell. I will keep my foot out of it until I install the Walbro on Saturday. I really appreciate the help from all that gave some. I will reply with my findings after I do some logging, post install of the Walbro.