EJ 207 (2001-2005) EDM STI, stage 2. New thread title. ;)

Patrick P931 · **Posted:** Tue Jul 31, 2012 9:24 pm

2015-06-13

There was a small thing noticed in my tuned rom so I've decided to delete these and upload a new revision where the avcs table is better used. Revised rom is called r5 avcs fix. I've also set the IAM to start at 8.

This is to date still the best edm ej207 rom I've driven, logged and tuned and with a good wbo2 you can lean it out a little.

Patrick

Original fourth post wrote:

2013-05-18

As this thread has developed in the direction of covering all edm ej207's and I think that they all can share the basis of this rom that was initially made for a 2003 STI, I've decided to change the topic.

Set (i.e. leave) your initial IAM at 8 when first starting out.

Patrick

Original third post wrote:

2013-05-16

It's been a while since I made any updates to my friends car. It runs really well and he is very happy.

I am attaching his latest revised rom, it has some changes to avcs (to take away stumble when approaching a stop light so I went back to stock settings at low loads) and adjustment to where KCA comes in.

The main difference is a considerable change to the total timing (through the base timing table) at high loads and high rpm as his car would suddenly knock with the r9 map!

How come? We don't really know more than that his old engine was consuming a lot of oil (before the remaps) so he put in another donor engine. Same year, same all, just new long block, and that new engine would knock with the r9 timing. Although in one of two cells the total timing is 5 degrees lower the car doesn't feel any slower, actually it feels the opposite!

If you consider flashing this or copying the maps to your rom, please start with inital IAM at 8. I still think it's a pretty great rom, if anyone asks.

Patrick

Original second post wrote:

Update 2012-11-19.

Further testing has resulted in R9. That is a pretty good rom.

Tested with 99 RON and 98 RON. I would not run it on anything less unless you lower advance and/or boost.

IAM is set to start at 16, if you want to feel "safer" set it to a lower number before flashing.

Climate is fairly dry and cold, tuned at sea level.

For comments see the thread.

Patrick

Original first post by Patrick P931 on July 31st 2012 wrote:

Hi!

I am tuning a friends 2003 EDM STI.

He has a newly built engine and the only mod from stock is a full 3" exhaust that is catless. I am not sure right now but I think that he also has a catless uppipe (I remember reading that these cars had 2 cats, is that correct?). That would make it a stage 2 tune I figure.

My plan is to influence the tuned rom largely by the Subaru S203 rom, boost level, fueling, and that amazing looking avcs.

What do you think? Any feedback is greatly appreciated!

Attached you'll find 2 learning views. One before starting anything and the other after reading the rom and driving for a couple of kilometers. IAM did not go back to 16 in this approx 10 min drive. My experience with these slightly older models is zero so I don't know how fast the IAM is supposed to climb back up.

Can I set initial IAM to 16 during tuning or is that not considered good?

I also attach the stock rom and the s203 rom (for reference). I hope to have the first tuned rom done tomorrow.

Patrick

brendy · **Joined:** Fri Jan 27, 2012 6:20 pm **Posts:** 235

Give it a bit longer, you need to put it through varying conditions inc full throttle etc through a few gears etc for it to learn quicker.

Dennis87 · **Posted:** Wed Aug 01, 2012 12:13 pm

Remeber that is some mayor differences on the JDM and EDM. Where the biggest is that the JDM have a twinscroll turbo. So you cant just use the boost/wastegate map from the s203.

The most easy way to get the IAM value up fast is to reset the ECU when the engine is warm. And then drive in 3 gear and give about 60-70% throttle so you are boosting a little bit. Then you IAM value will rise to 16 fast if everything else is ok

Patrick P931 · **Posted:** Wed Aug 01, 2012 12:23 pm

Hi!

Thank you for your replies!

I have finished the first version of the rom. There are influences from here and there.

Total timing could use a little more work, it is more or less stock up to 2 g/rev just smoothened a lot.

I am aware of the mechanical differences between this edm sti and the s203, but I feel that the s203 is a good place to start. I have actually more or less copied the boost and wastegate settings from the s203 map, together with the avcs map.

We'll see how it turns out. I have no idea about the loads we will reach, now I am guessing peak around 3 g/rev.

All comments are truly appreciated!

Patrick

Patrick P931 · **Posted:** Thu Aug 02, 2012 6:00 am

With a little inspiration and support from Throttlehappy I flashed and tweaked a little last night.

And imho it flies.

I'll share logs and the rom later. I'm using the phone now.

Peak values of just under 3 g/rev and 275 g/s.

I had a slight issue with a "stumble" just before 3000 rpm at wot, but I got rid of most of it (imo 99%) by zeroing cl/ol delay, richening the ol fuel map and increasing the advance slightly in that spot.

How much timing advance can these cars take? Running Shell V-Power, 99 RON.

Patrick

Dennis87 · **Posted:** Thu Aug 02, 2012 9:59 am

The EDM is running up to 28 total timing at redline on the std map. But i see the JDM is running a bit less. I think that is becasue the more aggressive AVCS

Im running at 29 total timing, 1.4 bar boost on my car. But im on E85 fuel

Patrick P931 · **Posted:** Thu Aug 02, 2012 9:22 pm

And here is the rom that we finally called it a night on.

The only issue I had was slight overboosting just after shifting. I'll share a couple of logs of revisions before this one as the final edits were only wgdc trying to control the boost. There are no logs of this final revision but it is probably very safe as there is less wgdc than the previous revision.

I think that the wgdc tables need work and the total timing could look better. I have also seen a rom with more overlap at high rpm, now this roms avcs map is S203.

Patrick

Patrick P931 · **Posted:** Thu Aug 09, 2012 4:30 pm

I know I promised to share a log. Here is one third gear wot of the rom that is posted above this post.

There are plenty more but not enough time to cut them out as the entire log is long with tons of wots but none that are as complete as this one.

I've also attached my next proposed revision, wgdc change (and removal of one dtc: p0420).

redwagon · **Posted:** Mon Oct 08, 2012 6:50 am

I used your map as a base for a car a few weeks back:

'04 EDM STi (EJ207)
EJ257 crank / stroker kit rods & forged pistons (8.5:1 CR)
JDM ECU (A45DA01Q)
TD05H-16G in 7cm2
Tomei EL header
Catless DP
Stock intercooler / intake

With the stock JDM ECU and map in the car, compounded with non-functioning AVCS due to neutral switch open-circuit, it had been knocking like hell and cracked a piston, hence the stroker build.

Starting with your timing table I had to pull back a little around 4k4rpm but it could be our gas isn't as good as yours, different chamber shape due to aftermarket pistons or....? Of course boost control needed some massaging but overall your map seems really well sorted. I especially like the AVCS mapping and how well ignition timing works with that. Together with the extra stroke the low-rev torque is really good.

Thanks!

throttlehappy · **Posted:** Mon Oct 08, 2012 8:29 am

Patrick P931 wrote:

I think that the wgdc tables need work and the total timing could look better. I have also seen a rom with more overlap at high rpm, now this roms avcs map is S203.

Patrick

The freer flowing exhaust needs a little more AVCS past peak power to assist with gearshifts and letting the engine 'rev through' and let the engine breathe. You wont see that in a log

Same as my maps where I drop WGDC past peak power to let the DP be the choke point rather than the turbine

Also, less AVCS on cruise/light load = improved fuel economy

Patrick P931 · **Posted:** Mon Oct 08, 2012 9:11 am

Redwagon: happy you liked it! The knock could be the fuel, he is using Shell V-Power 99 RON.

Throttlehappy: we'll give the revised avcs map a shot!

Cheers,
Patrick

redwagon · **Posted:** Fri Nov 09, 2012 12:46 pm

Patrick P931 wrote:

The knock could be the fuel, he is using Shell V-Power 99 RON.

Ah, thanks mate. The best we get is 98RON. It's consistent but I don't know how it stacks up against your V-Power.

Patrick P931 · **Posted:** Sat Nov 17, 2012 9:24 am

Did a couple of revisions to this car yesterday.

We left the rom not really finished last time and I wanted to test what would happen with a litle bit of extra overlap at high rpm.

I fixed the spool so now the boost feels very stable. 1 bar at 3300 rpm in third gear.

At first look extra avcs at high rpm did not yield in higher load (as TH said) so I plan to go back to the s203 avcs at high rpm today to compare if the load goes up.

I've attached a graph of the load of rev 5 (no avcs at high rpm) and yesterdays final rev 9 (better boost control and a little avcs at high rpm). I could share the rom but it feels better if I get the chance to log without the extra overlap first.

On another note, what is the max boost that a stock ej207 such as this one can take? Can I hit it with 1.5 bar at low-mid rpm or is that just taking unnecessary risks? Now I am asking for and getting about 1.35 bar.

Patrick

kfad89 · **Joined:** Sat Oct 06, 2012 12:00 pm **Posts:** 18

Hi Patrick,

Im quite new to tuning and I was wondering if i can apply your tune onto my map. If copy and pasting the tables work, which part can I copy?

Car mods:
03 EDM WRX STi
Stock VF35 turbo
Turbosmart MBC
Catless 3" dp
Full 3" TBE
Short ram intake
Upgraded fuel pump

ID: A4RN200H

Patrick P931 · **Posted:** Sat Nov 17, 2012 8:04 pm

Back to back tests did show that a little extra avcs at high loads and high rpm does make a difference!

Thank you Throttlehappy for pointing this out.

I made my "own" avcs map, S203 except for a little more overlap at high rpm/load inspired from TH.

RomRaider dyno (only software dyno that had 03 EDM STI preset) numbers look sweet. Only did one dyno run to test. 212 kW (ca 288 whp).

I feel confident to share this rom as I honestly think it's a pretty good 03 STI rom.

Patrick

RomRaider

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