Hey All,

I just posted this in EcuFlash, but thought it might do better here. Just wanted to toss this out for suggestions. Tunah has been super nice and has given me a lot of guidance and suggestions on my first tune. I know he's busy with his own car right now, so I wanted to bounce this off others.

03 Evo
10.5 hotside
Turbosmart 14psi actuator
Perrin Intake
ETS LICP
Grimmspeed 3-port
Supertech valves, fresh head.
Walbro 255
AEM Wideband

Stock exhaust and downpipe (new OEM cat).

So here's where I am:

This is where I can run very consistent without any knock.
Attachment 331124

Here's my map trace.
Attachment 331125

And full map.
Attachment 331126

Let me know what you think. I'm probably just getting greedy and wanting more out of a very stock car. Tunah has suggested that I'm just at the mercy of my exhaust. I tend to agree.

The car feels great, but that flat spot in the power from 4800-5800 is driving me crazy. I can't run any more boost or timing without getting knock.

Let me know what you think! I can post the log if necessary.

 

yeah man you have to get the air flowing and that stock exhaust is holding you back, but the numbers are really low. I haven't seen any dyno numbers from an evo with stock exhaust, ever

 

I think it's the exhaust, but then I see a thread like this:

https://www.evolutionm.net/forums/ev...k-exhaust.html

I'm wondering if I should try to run less boost up top and more timing. May be something to play with.

Edit: So I pulled up some old logs and found that I was able to run more boost with the same timing in the past, with no knock. I'm going to play with it later and see what I can do.

 

More boost and less timing seems to be making power. I'll play with it for a couple days and report back.

 

Stock exhaust, O2, and BOV are most likely not helping.You need one of these. http://www.shopenglishracing.com/Evo...d-Cut-Out.html

The car seems to be about right given your mods. On 91 octane w/ similar mods as you, plus an exhaust, O2, and BOV my car put down 264hp on a Mustang dyno. Once those are taken care of the cams, injectors, and FMIC will follow.

 

Sorry, running a slightly crushed IX BOV.

I made a little progress after work today. I'll see how she does. I'm working on getting my catback. I just like to squeeze what I can out of things before I move on.

 

yeah you really need the full exhaust.